Which statement best describes the cell membrane?
1. It is found only in animal cells
2. It is a nonliving structure
3. It controls reproduction in a cell
4. It controls the passage of materials into the cell

Answers

Answer 1

Answer:

The correct answer is 4

Explanation:

The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.

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Related Questions

The body and blood of jesus are symbolized:_______
A. With the color violet.
B. With the chi-rho symbol.
C. In the eucharistic meal.
D. On the forehead at lent

Answers

The body and blood of Jesus are symbolized with the chi-rho symbol

Chi Rho represents an early illustration of the relationship between Jesus' Crucifixion and Resurrection. An ancient Christian symbol is known as Chi Rho, pronounced "KEE-roe," is created by joining the first two letters of the Greek word Christos, which means "Christ." Early Christians used the Chi Rho symbol to represent both Jesus Christ and Christianity. Prior to the Battle of the Milivian Bridge outside of Rome in 312 AD, Constantine reportedly had a vision in which the Chi Rho symbol appeared. The monarch then had his soldiers' shields etched with the insignia. Constantine legalized Christianity throughout his kingdom after winning the conflict. Since then, he had made frequent use of the Chi Rho sign. Later Christian emperors also employed the Chi Rho as a vexillum they termed the Labarum. The coins of Constantine and his successors used this symbol.

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In animal cells, cell junctions called ______ junctions form barriers between cells that prevent leaking of fluids and water-soluble molecules.

Answers

Animal cells communicate via their extracellular matrices and are connected to each other via tight junctions, desmosomes, and gap junctions

in cocker spaniels, solid coat color is dominant over spotted coat color. If two heterozygous dogs were crossed to each other, what would be the probability of the following combinations of offspring

Answers

A gene region where there are two distinct alleles present. One normal allele, one mutated allele, or two distinct mutated alleles can make up a heterozygous genotype.

Combinations of offspring:

Let's say that the letter S stands for a solid coat and the letter s for a spotted coat. This indicates that the genomes of the two heterozygous cocker spaniels are Ss. As a result, the likelihood of the progeny having a solid coat (SS and Ss) is 75% and a spotted coat (SS) is 25%.

There is a 25% chance that the firstborn puppy in the first litter will have spotted fur. The likelihood that 4 of the 5 remaining pups will have spotted fur is 1/4 x 1/4 x 1/4, or 1/256. Calculate the likelihood that the second litter will have 6 pups with solid fur by multiplying 3/4 by 6, which equals 64/4096 or 1.5% The probability that the second litter will contain 1 pup with spotty fur is 25%.

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What is the correct sequence of enzymes involved in dna replication, considering the lagging strand?

Answers

The correct sequence of enzymes in DNA replication includes such as DNA helicase, RNA primase ,DNA polymerase, and DNA ligase. This process of DNA replication the double helix unwinds with the help of enzymes DNA helicase.

The lagging stand is the parent stand that runs in 5' and 3' direction towards the fork and the replication discontinue. DNA ,two strands at a replication fork. one stand is the leading stand which runs from 5' to 3' and other stand is lagging stand runs from 3' to 5' fork and it is made in small pieces called okazaki fragments.

The leading stand which synthesis in continuous manner, synthesis of lagging strand requires a primase that makes RNA primers that can extended by DNA polymerase to form okazaki fragments.

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What causes clouds to condense and form?
Select one:
O a. As cold air sinks, water vapor is released.
O b.
As hot air rises, water vapor is released.
O c.
As winds drive cold air across the Earth's surface, water vapor is released.
O d. As winds drive hot air across the Earth's surface, water vapor is released.

Answers

Answer:

C

Explanation:

As winds drive cold air across the Earth's surface, water vapor is released.

Answer:

B

Explanation:

Water is constantly cycling through the atmosphere. Water evaporates from the Earth's surface and rises on warm updrafts into the atmosphere. It condenses into clouds, is blown by the wind, and then falls back to the Earth as rain or snow.

A diploid individual with two identical alleles for a particular gene is said to be:.

Answers

Answer:

Homozygous for that gene.

Explanation:

A diploid individual with two identical alleles for a particular gene is said to be homozygous for that gene, but if the individual has different alleles he or she is said to be heterozygous for the gene.

Oxygen gas (o2) is an example of a/an __________. a. element b. mixture c. compound d. cell

Answers

The answer is (a) element

Scientists use the scientific process to which mechanisms underlie observations; they do not if a particular finding is correct or not. a broad statement called a can be used to solidify reasoning before setting up an experiment, and then the scientific process is followed to test one's idea. to illustrate, consider this scenario: suppose you are a researcher investigating the impact of eating eggs on cholesterol levels. your states "consuming an egg everyday increases blood cholesterol". you use a carefully designed experiment to determine if your statement is or not. in this experiment, number of eggs is the , while cholesterol level in the blood is the . you recruit 100 subjects and divide them into two groups: the corresponds to subjects who will eat an egg everyday, and the comprises individuals who will not consume eggs. in order to avoid confounding results, both groups need to have like same gender, similar age, consistent baseline cholesterol measurements, equivalent food consumption, identical exercise routine, etc. in a well-designed experiment, there should only be one variable, but many variables. after a six-month trial, your data show both groups have similar blood cholesterol measurements. your conclusions include that eating one egg everyday for one year does not raise blood cholesterol; your hypothesis was .

Answers

The hypothesis was that eating one egg everyday for one year may or may not raise blood cholesterol levels.

What is a hypothesis?

A hypothesis is an explanation given prior to testing of an observation.

A hypothesis aims to give a reasonable explanation for a given observation.

The experiment given was designed to test if eating one egg everyday for one year will raise blood cholesterol.

Therefore, the hypothesis was that eating one egg everyday for one year may or may not raise blood cholesterol levels.

In conclusion, a hypothesis is like a guess without testing.

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If sperm do not exit through the vas, either because the man has had a vasectomy or has not ejaculated, in what region of the testis do they remain

Answers

The epididymis region of the testis do they remain.

What about epididymis?Each testis has a little, tightly coiled tube linked to it (the male sex glands that produce sperm). Male reproductive cells known as sperm travel from the testicles into the epididymis, where they mature and are then stored.The epididymis' most obvious job is to move sperm from the rete testes to the vas deferens.The immature sperm from the testis is received by the tortuously coiled epididymis, which stores it for several days. Sperm is forcibly discharged into the deferent duct during ejaculation from the epididymis' tail.Sperm is transported from the testes and stored in the long, coiled epididymis. It is seen as a curving structure on each testis' posterior (rear) edge. There are three parts to it.

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The function of sigma factor in bacteria is replaced by that of _____ in eukaryotes.

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The function of sigma factor in bacteria is replaced by that of general transcription factors in eukaryotes.

General transcription factors along with RNA polymerase form the basal transcription apparatus that binds to promoters in eukaryotes to initiate transcription.

Sigma factor (σ factor or specificity factor) is a protein needed for initiation of transcription in bacteria. It is a bacterial transcription initiation factor that enables specific binding of RNA polymerase (RNAP) to gene promoters. It is homologous to archaeal transcription factor B and to eukaryotic factor TFIIB.

Sigma factor is an accessory protein to RNA polymerase in bacteria that helps the polymerase bind to the promoter region.

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A procedure that increases the appetitiveness or aversiveness of a stimulus is called a(n):_______

Answers

A procedure that increases the appetitiveness or aversiveness of a stimulus is called   Establishing operation.

Any stimulus that will increase the chance that a preceding behavior will arise again. Satisfies a biological need and works clearly, no matter someone's previous enjoy.

Stimulus that will become reinforcing because of its affiliation with a number one reinforcer. Aversives are unpleasant stimuli that result in adjustments in behavior via negative reinforcement or effective punishment. by using applying an aversive right now earlier than or after a behavior the likelihood of the target conduct going on in the destiny is reduced.

Stimulus is some thing that makes an organism or part of an organism react in some way. for example, for maximum vegetation, daylight acts as a stimulus that reasons stimulates them to grow or pass toward it.

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A procedure that increases the appetitiveness or aversiveness of a stimulus is called Abolishing Operation.

Abolishing Operation is to describe events that decrease the punishing effectiveness of a consequence and change the frequency of the future related to that particular consequence.

It is a type of motivating operation that is responsible in making stimulus more desirable. Many unconditioned abolishing operations are identified in humans.

Example: Satiation of sleep, activity, food, Cold and warmth.

Aversiveness tends to avoid or punish stimulus.

Appetitive stimulus is an unconditioned stimulus that can be modified by deprivation.

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Sari and Jon disagree over who needs more calories (proportionately) per day to survive a three-month-old baby or a

grown adult San argues that a grown adult is bigger and needs more calories per pound of body weight Jon believes

the baby would require more calories per pound of body weight

he is most likely conect and why?

San, because it takes more energy to move the larger muscles that adults have, so they need more calories

Jon, because babies grow at a much berate than adults and require more cabries to support this growth

Jah, because babies are more active than grown adults and need more energy from calories

San because adults have more to do during the day and need more calories to sustain their activities

Answers

Answer:

Jon, because babies grow at a much [faster rate] than adults and require more [calories] to support this growth

Explanation:

Adults need 13 calories per pound of body weight while babies need 35 to 50 calories per pound of body weight.

Answer:

b

Explanation:

Biological membranes are selectively ______, meaning they allow only specific types of molecules to pass into or out of the cell.

Answers

Biological membranes are selectively permeable as it allows only some substances and molecules to pass into or leave the cell. Selective permeability is defined as ability of the cell membrane to allow certain substances to pass through while keeping others out. Molecules can selectively pass through the cell membrane, small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly. Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly.

Plasma membranes allow certain substances to enter and leave a cell, while preventing harmful material from entering and essential material from leaving. In other words, plasma membranes are selectively permeable they allow some substances through but not others.

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Identical twins are produced from the same sperm and egg. After the first mitotic division, the cells detach from each other and develop into distinct individuals. In contrast, fraternal twins are produced from separate sperm and separate egg cells. If two parents with brown eyes (a dominant trait) produce one twin boy with blue eyes, what are the probabilities of the following

Answers

The probability of other twin to have blue eyes is 100% because they are genetically identical.

Are identical twins are formed from two different eggs and two different sperm?

One fertilized egg (ovum), which develops into two children with the same genetic makeup, produces identical or monozygotic twins. Two eggs (ova) are fertilized by two sperm to create fraternal or dizygotic twins, which are two genetically distinct infants.

How is identical twins formed?

When a single egg (zygote) is fertilized, identical twins (monozygotic twins) are produced. The egg then separates into two, producing genetically identical twins. If your twins are identical, you will have two girls or two boys because identical twins are always of the same sex.

What is special about identical twins?

Identical twins have DNA that is 99.9% the same. They also have almost nearly identical brain wave patterns. But they do have different fingerprints and teeth marks! 22% of twins are left-handed as opposed to the 10% of singletons who turn out to be left-handed.

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Why do you think that there are so many different ways for the body to fight off infection and invasion by foreign or disease causing particles

Answers

Because the body is made with cells to fight off infections and disease

If there is an high concentration of carbon dioxide in the blood stream, it will diffuse into the

Answers

Answer:no because we have vitals that help with that

Explanation:

After being shot in the head in Iraq, what type of glial cells began to restore the barrier between Brandon's brain and blood

Answers

The type of glial cells that began to restore the barrier between Brandon's brain and blood is the astrocytes.

What are glial cells?

The glial cells are does cells that are non-neuronal cells found within the nervous system which helps to provides physical and metabolic support to neurons.

An example of glial cells is the astrocytes which are the building blocks of the brain neurotransmitters that aids in brain injury recovery.

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Which events occur during the atrial contraction and ventricular filling phase of the cardiac cycle?

Answers

Blood flows from the atria to the ventricles during ventricular diastole, and from the ventricles to the pulmonary artery and the aorta during ventricular systole during the cardiac cycle .

The cardiac cycle is a sequence of electrical and mechanical events that take place when the heart is contracting and relaxing (diastole) (systole). Blood flows from the atria to the ventricles during ventricular diastole, and from the ventricles to the pulmonary artery and the aorta during ventricular systole.The atrial musculature begins to contract with atrial depolarization. The pressure inside the atrial chambers rises as the atria contract, pushing more blood across the open atrioventricular (AV) valves and causing a quick flow of blood into the ventricles.The atria relax (atrial diastole) and receive venous return from both the body and the lungs during ventricular contraction. The lower chambers then loosen up during ventricular diastole, enabling initial passive filling of of the thick-walled ventricles and emptying of the atria.

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one way that the investigator could increase the validity of the investigation​

Answers

Answer:

for different purpose like accuracy, validate

PLEASE ANSWER QUICK

Which of the following has two lenses as well as a light bulb in the base that shines light through the specimen?

Group of answer choices

scanning electron microscope

compound light microscope

transmission electron microscope

scanning tunneling microscope

Answers

Answer: compound light microscope

Explanation: a microscope that shines light through a specimen and has two lenses to magnify an image (Ocular lens and Objective lens)

A male is heterozygous for the trait that produces freckles on the skin, and he has freckles. If he marries a woman who is also heterozygous for freckles, ________ of their children are predicted to be freckled. Also, of all their children, ________ are predicted to be heterozygous.

Answers

A male is heterozygous for the trait that produces freckles on the skin, and he has freckles. If he marries a woman who is also heterozygous for freckles, 75% of their children are predicted to be freckled. Also, of all their children, 50% are predicted to be heterozygous.

The genotype of a plantThe plant must be homozygous for the trait because the phenotype reflects the genotype. To test if any white plants emerge, cross the red plant with a white plant.A gene region where there are two distinct alleles present. A heterozygous genotype can consist of one normal allele and one mutated allele, or two different mutated alleles.The symbol Tt stands for the heterozygous state, in which a gene's homologous pair has two distinct alleles.

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The controls of the windshield wiper and windshield washer are usually located on _______.

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The controls of the windshield wiper and windshield washer are usually located on Right lever. Two levers on steering column contain controls for driving. .

A sun visor is located ion the above of windshield  also called windscreen . Designed with a flap that is adjustable to help shade the eye of drivers and passengers from the glare of sunlight.

The combination switch they flip beam switch or the directional switch that is on the left hand stalk signals and cancels turn indications when moved up or down.Automotive wipers are controlled by a microprocessor. windshield washer used to keep it clear for rain . snow , dust.

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Substance A is transported from the plasma of the peritubular capillary into the fluid of the renal tubule. Substance A is said to be __________.

Answers

The transport of substance A from peritubular capillary into the fluid of renal tubule is Tubular secretion.

What is Tubular secretion?

Tubular secretion is the phenomenon of transfer of materials from peritubular capillaries to fluid of renal tubule. It is basically a process of toxins removal from blood capillaries and tissues and their active secretion into the nephrons. The nephrons are surrounded by peritubular capillaries and the exchange between nephron and blood occurs via peritubular capillaries. The tubular secretion is most active in proximal convoluted tubule (PCT). Tubular secretion is an important parameter for measuring kidney function and excretion process. It also maintains the blood pH.

Hence, the substance A that is transported from plasma of peritubular capillary  into fluid of reanl tubule is said to be secreted.

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In a neuroscience experiment, which one of these would best indicate LTP?

Answer choices:
Elongation of the postsynaptic neuron
Stronger and more frequent action potentials in the postsynaptic neuron
Stronger and more frequent action potentials in the presynaptic neuron
Spines growing throughout glia

Answers

In a neuroscience experiment, the one of these would best indicate LTP is Stronger and more frequent action potentials in the postsynaptic neuron.

What is long-term empowerment?

Long-term potentiation (LTP) is the increase in postsynaptic responses over hours, days, or weeks after brief repetitive stimulation of presynaptic afferents.

However, for study purposes, LTP is commonly divided into three sequentially occurring phases: short-term potentiation, early LTP, and late LTP.

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An intravenous hypertonic solution containing dextrose, proteins, vitamins, and minerals is known as?

Answers

An intravenous hypertonic solution containing dextrose, proteins, vitamins, and minerals is known as total parenteral nutrition

A hypertonic solution is one that has more dissolved particles than normal cells and blood do, including salt and other electrolytes. For instance, wounds are soaked in hypertonic liquids.

Blood has a lower concentration of dissolved particles than hypertonic fluids. 3 percent Normal Saline is an illustration of a hypertonic IV solution (3 percent NaCl). The intravascular space has a higher concentration of dissolved solutes than the cells when hypertonic fluids are injected. In contrast to a hypotonic solution, a hypertonic solution includes more of the other substance and less water.

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How is it possible for organisms to undergo both punctured equilibrium and gradualism?

Answers

Answer: Gradualism and punctuated equilibrium are two ways in which the evolution of a species can occur. A species can evolve by only one of these, or by both. Scientists think that species with a shorter evolution evolved mostly by punctuated equilibrium, and those with a longer evolution evolved mostly by gradualism.

Explanation:

Phosphorous acid, a common ingredient used for potable water treatment, has a molecular formula of:_______

Answers

Answer:

H³PO⁴

Explanation:

Phosphoric acid (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is an inorganic compound with the chemical formula H3PO4. Phosphoric acid is a colorless solid, it is commonly encountered as an 85% aqueous solution, which is a colourless, odourless, and non-volatile syrupy liquid.

In the movement of water across a selectively permeable membrane lab. What substance was actually able to pass through the membrane?

Answers

If the membrane is selectively permeable or semipermeable membrane molecules, such as hydrocarbons and oxygen can only cross the cell membrane.

Larger molecule like hydrocarbons and carbon cannot cross the cell membrane . water can only cross between the lipids .Hence ,Osmosis is a special type of diffusion, that allows diffusion of water across a semipermeable membrane. Water readily crosses a membrane down its potential gradient from high to low potential. Osmotic pressure is the force required to prevent water movement across the semipermeable membrane. Any substance crosses the cell membrane by two basic ways passive transport, which requires no energy; and active transport, which requires energy.

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What is the term for biodiversity that results from few ancestral species

Answers

Adaptive radiation is the term for biodiversity that results from a few ancestral species.

What is biodiversity?

The term biodiversity (from “biological diversity”) guides to the mixture of life on Earth at all its levels, from genes to ecosystems, and can contain the evolutionary, ecological, and cultural functions that sustain life.

Biodiversity includes not only species we consider rare, endangered, or endangered but also every living thing—from humans to organisms we understand little about, such as microbes, fungi, and invertebrates.At the Center for Biodiversity and Conservation, we have human and human cultural diversity as a component of biodiversity. We use the term “biocultural” to represent the occupied, always evolving, and connected nature of people and place, and the notion that sociable and biological measurements are interrelated. This vision recognizes that human use, knowledge, and beliefs influence, and in favor are influenced, by the ecological methods of which human residents are a part.

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The Stages of Change are known as what psychological model? Autonomy Self-Determination Theory (SDT) Motivational Interviewing (MI) The Transtheoretical Model (TTM)

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The Stages of Change are known as The Transtheoretical Model (TTM)

The transtheoretical model of behavior change is an integrative treatment theory that determines whether a person is ready to adopt a new, healthier behavior and offers methods or tactics to help the person change.According to the TTM, there are six stages of change that people go through: precontemplation, contemplation, preparation, action, maintenance, and termination. Termination was not included in the initial model and is used less frequently when using the phases of change for behaviors relating to one's health. Different intervention techniques are most effective at advancing a person through each step of change so that they might reach maintenance, the optimal stage of behavior, later on in the model.

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How many moles of electrons are transferred when the two half-reactions shown below are combined to generate the spontaneous balanced chemical reaction with the lowest possible integer coefficients As autumn approaches, white-tailed deer begin to accumulate a layer of body fat. this is an example of which characteristic of life? Is someone able to help me? You dont have to explain just give answers Please help!I don't understand part B. Which options reflect the requirements for factoring using quadratic form? (Select all that apply.) What steps may be necessary to predict data not included in a data set using a scatter plot and line of best fit? Select all that apply. The vehicle preference of police officers and firefighters is given in the table.Police Officers FirefightersCars 12 3Trucks 9 4SUVs 15 2Based on the information in the table, which of the following is an example of independent events. An Independent group experiment or between-subjects experiment comparing four treatment conditions produces 20 scores in each treatment condition. How many individuals participated in the entire experiment List out the citizen liabilities Part 1. A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1.50 atm.F2 + 2NaCl Cl2 + 2NaFPart 2. Explain how you would determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP. What is a theme of the passage?A. Quests for adventure can lead to the unexpected.B. Adventure often results in loss of innocence.C. It is important to maintain special traditions.D. Wisdom of experience should be valued. -How did the economic depression impact the following areas? Europe: United States (1918-1929): United States (1929-1939): Determine the output voltage of the op-amp circuit shown below: 2. Explain one way the people of the Eastern Woodlands and Great Plains were different.M How many moles of nitrogen gas are there in 6.8 liters at room temperature and pressure (293 K and 100 kPa)?A. 163.2B. 0.28C. 152.3D. 0.30 Suppose you prepare 500 ml of a 0.10 Msolution of some salt and then spill some of it. What happens to the concentration of the solution left in the container dentify the run-on in the selection. If the selection contains no run-on, select "Correct."A) I saw many adorable kittens and puppies at the animal shelter. B) I am allergic to fur, I adopted a turtle instead. C) A turtle, however, is not very cuddly. Volume=Help me please I appreciate it so much :) What describes accenture's approach to automation, both internally as well as for clients? As of 2019, there were approximately ________ Latinos residing in Texas.