Answer:
The blood brain barrier blocks chemicals from entering brain tissue.
Explanation:
Write down a mechanism for increasing genetic variation in BOTH eukaryotes and prokaryotes.
Answer:
Genetic variation mechanisms are different in prokaryotes and eukaryotes, Transformation, transduction, and conjugation in prokaryotes whereas crossing over, random assortment, and random fertilization in eukaryotes.
Prokaryotes:
Prokaryotic cells can lead to genetic variation by recombining their genetic material. In prokaryotes, horizontal gene transfer (HGT), in which gene transfer from one organism to another in the same generation. The three most common ways of HGT are transformation, conjugation, and transduction.
Eukaryotes:
Eukaryotic organisms can perform either sexual and asexual or both reproduction in which they are able to transfer genetic material (DNA) to their offsprings. Such transfer of genetic material process is called vertical gene transfer. In sexually reproducing organisms, independent assortment during zygote formation, a mutation in genes, and crossing over during prophase 1 in meiosis is the process that increases the chances of genetic variation.
What is the function of the fungal structure shown?
A. Energy production
B. Reproduction
C. Nutrient absorption
D. Photosynthesis
Answer:
Nutrient absorption
Explanation:
the mushroom helps the trees extract minerals and water from the soil .
Gina is lactose intolerant but she loves to eat cheesy fries from her local restaurant. What do you suggest Gina does differently so she gets the same nutrients but does not suffer with the bloating and pain she feels after eating cheesy fries?
a. Eat a smaller portion of fries and order a cup of vegetable soup.
b. Add jalapeño peppers to the fries since the spice will counteract the effects of the dish.
c. Order macaroni and cheese instead.
d. Ask for a low-fat cheese option
Answer:
A
Explanation:
Its the most logical one
Why is respiration essential for all organisms?
Explanation:
to obtain energy..........
How is genetic material passed from parent s to offspring?
DNA is the genetic material and pass from. parents to offspring
function of semilunar valves in the heart
Answer: They close to prevent blood from flowing back into the ventricles.
Explanation: To find the semilunar valve is the valve between the left ventricle and the aorta is the aortic semilunar valve.
4. The inner membrane of the mitochondria is impermeable to ions. How does this fit with what
you've learned about membrane structure? Why is this important to cellular respiration?
Answer:
The inner mitochondrial membrane contains proteins involved in the electron transport chain. This chain releases energy that is then used to generate an electrochemical gradient, which is subsequently used to synthesize ATP
Explanation:
Mitochondria are membrane-bound organelles that have an inner membrane separated from an outer membrane by the intermembrane space. Moreover, the mitochondrial matrix is located within the inner membrane. The inner mitochondrial membrane contains proteins involved in the electron transport chain and ATP synthesis. Oxidative phosphorylation (electron transport chain) is the third stage of cellular respiration in aerobic organisms in which ATP is generated by transferring electrons from NADH or FADH2 to O2 by a series of electron carriers located in the inner mitochondrial membrane. The trans-membrane complexes of electron carriers are multiprotein enzyme complexes (I–V) and electron carriers (i.e., coenzyme Q10 and cytochrome c) required for the communication between complexes. The electron transport chain is coupled to proton transfer from the matrix out to the intermembrane space, thereby generating a proton gradient which is then used by ATP synthases to synthesize ATP.
What is the answer for this
Answer:
Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
What is the role of RNA?
Answer:
It is the 1st one ○ to provide the original blueprint for protein production
Explanation:
RNA polymerase (green) synthesizes RNA by following a strand of DNA. RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
An organism that creates its own food is called:
A) a producer
B)a consumer
C)a carnivore
D) a decomposer
Answer:
a
Explanation:
Answer:
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers.Organisms are characterized into two broad categories based upon how they obtain their energy and nutrients: autotrophs and heterotrophs. Autotrophs are known as producers because they are able to make their own food from raw materials and energy. Examples include plants, algae, and some types of bacteria.
Natural selection was acting on the population of radish plants. Which of the following DOES NOT satisfy a condition of natural selection as it relates to our radish populations?
a. there was a purple phenotype and a white phenotype
b. the R allele produced a white plant, and rr produced purple plants
c. competition was affecting the reproductive success of at least one of the morphs
d. our populations of radishes were small
e. all of the above are examples of conditions necessary and sufficient for evolution by natural selection
Answer:
d. our populations of radishes were small
Explanation:
Natural selection is a type of evolution that allows only individuals with favorable characteristics and better adapted to the environment to survive and reproduce offspring with the same favorable characteristics. In this case, to observe a population where natural selection is taking place, population sizes can be disregarded, as this is not a condition for natural selection to take place. However, the other conditions presented in the response options are necessary for natural selection, since it is necessary that there are different phenotypes and genotypes in the population and that competition between them promotes the survival of one group at the expense of the other.
When comparing energy and chemicals in an ecosystem?
Answer:
Chemical nutrients and energy tend to flow in the same direction for most of an ecosystem. The big difference is that the chemical nutrients are ultimately recycled in the ecosystem while the energy is ultimately lost from the ecosystem to the universe at large. Energy in any ecosystem ultimately comes from the Sun.
Plants convert ________.
Answer:
sunlight into energy
Explanation:
Do you think humans have a moral obligatie to preserve the habitate of the chimp.
What is meant by Vetebral Column?
Estimate the sum of the masses: 56.9kg, 43.9kg, 60.5kg, 29.8kg
Answer:
191.1 kg.
Explanation:
The total mass of all these objects can be determined by adding all the masses present in the question. 191.1 kg is the value of total masses when the given masses such as 56.9kg, 43.9kg, 60.5kg and 29.8kg are added with each other. This value is considered as the total sum of all masses so we can say that the total value is obtained after all the masses are combine or added together.
Was there any significant difference in appearance between the two bean plants? if so, what was the difference?
Explanation:
the plant in the sunlight will receive green color due to chlorophyll and the plant in the dark will have yellow or white color due to the lack of chlorophyll
A polysaccharide is:
A. A fatty acid chain.
B. A chain of monosaccharides.
C. A poly sugar and a saccharide bonded by a 1-4 glycosidic bond.
D. None of these is correct.
Answer:
B. A chain of monosaccharides
Explanation:
Polysaccharides, or polycarbohydrates, are the most abundant carbohydrate found in food. They are long chain polymeric carbohydrates composed of monosaccharide units bound together by glycosidic linkages.
. Why is Gandhi giving advice or comfort to Dr. King in this cartoon?
Answer:
Explanation:
Gandhi who was assassinated about 20 years before King, is telling King all that happens when they kill your body is that what you have stood for and what you have left behind for your followers lives long after your death. Not to worry is the message: all will come out well when the methods you have used sink in to the leaders and followers you have left behind.
All that happens is that those who oppose you enough to kill you will think you are dead: you are not. Your legacy becomes stronger and stronger.
2. Which types of halogen compounds are known to contribute to ozone depletion?
O A. Chlorofluorocarbons
O B. Salts
O C. Alkali metals
O D. Oxides
Answer:
A. Chlorofluorocarbons
Explanation: short answer
Answer:
A. Chlorofluorocarbons
Explanation:
Halogens are a chemical family containing fluorine, chlorine, bromine and iodine; any carbon compound containing them is known as a halocarbon. While all halogens have the ability to catalyze ozone breakdown, they have an unequal impact on the ozone layer. A catalyst is a compound which can alter the rate of a reaction without permently being altered by that reaction, and so can react over and over again. In this fashion it is estimated that one molecule of chlorine can degrade over 100,000 molecules of ozone before it is removed from the stratosphere or becomes part of an inactive compound. These inactive compounds, for example ClONO2, are collectively called 'resevoirs'. They hold chlorine in an inactive form but can release an active chlorine when struck by sunlight. The relative potency of the different halogens depends a great deal on the stability of the resevior compounds. Hydrogen fluoride, HF, is so very stable that fluorocarbons have relatively no known impact on ozone. Bromine resevoirs, such as HBr and BrONO2, are much more easily broken up by sunlight; causing bromine to be from 10 to 100 times more effective than chlorine at destroying ozone. From 30-60% of bromocarbons released to the atmosphere are man-made (methyl bromide fumigants and halon fire extinguishers) and both compounds will soon be restricted by international agreement.
What is the 'processor of thermoregulation that determines if a change in
body temperature is needed?
A. Thyroid
B. Pancreas
C. Kidneys
D. Hypothalamus
Answer:
D) Hypothalamus
Explanation:
which characteristic of water allows it to absorb large amounts of energy without a large rise in temperature
Answer:
Specific heat capacity
Explanation:
Determine whether each statement describes mitosis, melosis, or both mitosis and melosis.
Answer:
This question is incomplete as it lacks statements, the statements and the answers are as follows:
occurs in organisms that sexually reproduce - MEIOSIS
occurs during growth and development - MITOSIS
the DNA is replicated - MITOSIS AND MEIOSIS
occurs in all organisms - MITOSIS
the number of chromosomes remains the same - MITOSIS
the number of chromosomes reduces by half - MEIOSIS
Explanation:
Meiosis and mitosis are both types of cellular divisions that occur in living cells. Mitosis involves the formation of two (2) daughter cells that are genetically identical to the parent cell while meiosis involves the formation of four (4) daughter cells that are genetically different from the parent cell.
The following are characteristics of the two division processes based on this question:
MITOSIS:
- It occurs during growth and development of an organism.
- it involves DNA replication
- it occurs in all organisms since every living organism undergoes growth and development.
- the number of chromosomes after mitosis remains the same in the daughter cell i.e. 2n remains 2n
MEIOSIS:
- It occurs only in organisms that sexually reproduce.
- it also involves the replication of DNA
- The number of chromosomes in the daughter cells is reduced by half i.e. 2n to n.
Over the past few hundred years, the human population on Earth has
Answer:
7.9 billion
in June 2021 to the United nations Estimated elaborted by worldmeter.
Which of the following is rich in organic nutrients?
a.Potash
b.Compost
c.Ammonium Sulphate
d.Urea
If you answer I will follow you
answer fast
Answer:
Compost
Explanation:
Compost is rich in organic nutrients
five characteristics of harmattan
The Harmattan is a season in West Africa, which occurs between the end of November and the middle of March. It is characterized by the dry and dusty northeasterly trade wind, of the same name, which blows from the Sahara Desert over West Africa into the Gulf of Guinea.[1] The name is related to the word haramata in the Twi language.[2] The temperature is cold in most places, but can also be hot in certain places, depending on local circumstances.[3]
The Harmattan is a season in West Africa, which occurs between the end of November and the middle of March. It is characterized by the dry and dusty northeasterly trade wind, of the same name, which blows from the Sahara Desert over West Africa into the Gulf of Guinea.[1] The name is related to the word haramata in the Twi language.[2] The temperature is cold in most places, but can also be hot in certain places, depending on local circumstances.[3]Harmattan haze surrounding Abuja National Mosque in Abuja
The Harmattan is a season in West Africa, which occurs between the end of November and the middle of March. It is characterized by the dry and dusty northeasterly trade wind, of the same name, which blows from the Sahara Desert over West Africa into the Gulf of Guinea.[1] The name is related to the word haramata in the Twi language.[2] The temperature is cold in most places, but can also be hot in certain places, depending on local circumstances.[3]Harmattan haze surrounding Abuja National Mosque in AbujaThe Harmattan blows during the dry season, which occurs during the months with the lowest sun. In this season the subtropical ridge of high pressure stays over the central Sahara Desert and the low-pressure Intertropical Convergence Zone (ITCZ) stays over the Gulf of Guinea. On its passage over the Sahara, the harmattan picks up fine dust and sand particles (between 0.5 and 10 microns). It is also known as the "doctor wind", because of its invigorating dryness compared with humid tropical air.
Explanation:
Harmattan is a season in west Africa.
What must be true for natural selection to happen?
A. There can be no competition for resources
B. There must be genetic variation in the population.
C. All organisms must reproduce the same amount.
O D. The population must be below carrying capacity.
Answer:
B
Explanation:
There must be genetic variation in the population.
5. Which function is associated with phagocytes in the blood?
O A) initiating blood clots
B) transporting dissolved nutrients
O C) producing antibodies
D) engulfing bacteria
Answer:
D) Engulfing Bacteria
Explanation:
How does replanting trees increase the sustainability of forestland?
A. Replanting reduces the consumption of wood.
B. Replanting reduces the demand for wood.
C. Replanting increases the cost of wood.
D. Replanting increases the supply of wood.
______ function mainly in cellular movement
O Microtubules
O Microfilaments
O intermediate filaments
Answer: Microtubules function mainly in cellular movement.
Microtubules are responsible for a variety of cell movements, including the intracellular transport and positioning of membrane vesicles and organelles, the separation of chromosomes at mitosis, and the beating of cilia and flagella.Microtubules are filamentous intracellular structures that are responsible for various kinds of movements in all eukaryotic cells. Microtubules are involved in nucleic and cell division, organization of intracellular structure, and intracellular transport, as well as ciliary and flagellar motility.