Explanation:
Small and nonpolar (hydrophobic) molecules can freely pass through the membrane, but charged ions and large molecules such as proteins and sugars are barred passage.
Nonpolar and small polar molecules can pass through the cell membrane, so they diffuse across it in response to concentration gradients.
specific enteroendocrine cells of the stomach, called g cells, are stimulated by partially digested proteins, caffeine, and rising ph. when stimulated, g cells secrete ________.
when stimulated, g cells secrets oocytes
the mycelium is a mesh of filaments, each of which is called
Why do parasites not require complex nervous or muscular tissue?
Porque los parásitos no requieren tejido nervioso o muscular complejo?
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Poorly developed nervous and muscular systems – because parasites live inside their hosts, they don't need eyes, ears or a keen sense of smell to detect potential predators nor a brain to facilitate escape. They have little need for a muscular system because they have no place to go.
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meaning of Natality Rate
Answer:
It's the same as the birth rate.
an adaptation of the epithelial cells of the proximal convoluted tubule for reabsorption is
what is an important function of the urinary system?
Answer:
the kidneys are the most important function of the urinary system
Explanation:
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<3 anmol
2- El electron ocupa el nivel
de menor energia que se
encuentran libre falsa o verdadera
verdad
porque si estos tuvieran carga positiva ya no serían electrones
(c)
In the human body, glucose is absorbed into the blood from the small intestine.
The small intestine contains many villi.
Which two of the following help the absorption of glucose in the small intestine?
Tick () two boxes.
Villi have a cell wall.
Villi are covered in thick mucus.
Villi give the small intestine a large surface area.
Villi have many blood capillaries.
(2)
Total 7 marks)
Answer:
villi is used and is very imp as it has structure like finger type which help for increase in surface area for more absorption and less wastage of water/minerals
Answer:
villi have a cell wqll
Explanation:
PLZZZZZZZ help me and thank you
Answer:
it's in the book hehe 11111111111111
Explain how pollution from one location
can affect the environment far away from the
source of the pollution
Answer:
Air quality is affected by natural processes. Wind can move pollutants from their source to far-away locations. It can still spread and harm living creatures and destroy their environments.
Explanation:
Air quality is affected by natural processes where wind can carry pollutants to places far away from their source which can still spread and harm living beings and destroy their environments.
What is Pollution?Pollution is defined as the introduction of harmful materials into the environment where the harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash which can also be created by human activity, such as waste or runoff produced by factories. Pollutants harm the quality of air, water and land.
Many things produce pollution such as cars spewing pollutants from their exhaust pipes. Burning coal to generate electricity pollutes the air. Industries and homes generate waste and sewage that can pollute land and water. Pesticides which is chemical poisons used to kill weeds and insects which is seep into waterways and harm wildlife.
Thus, air quality is affected by natural processes where wind can carry pollutants to places far away from their source which can still spread and harm living beings and destroy their environments.
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the organ that transfers nutrients and oxygen from mother to embryo is called the
Answer:
The fetus is connected by the umbilical cord to the placenta, the organ that develops and implants in the mother's uterus during pregnancy. Through the blood vessels in the umbilical cord, the fetus receives all the necessary nutrition, oxygen, and life support from the mother through the placenta.
at what point in sperm production do you hypothesize that loss of the testis-blood barrier would have an immunological effect on sperm production?
Answer:
when u do ittttt
Explanation:
100!!! POINTS!!!!
On the map, take a close look at the boundary along southern California and Mexico’s Baja California Peninsula. The arrows on the map show the direction and speed of the plates along this boundary in millimeters per year. Based on the speed and direction of the arrows, identify the type of plate boundary at this location. Which landforms or events are likely to occur there as a result? (Hint: It may be helpful to model the motion of the plates using your hands or pieces of paper.)
Explanation:
Thus, at convertgent boundries, continental crust is created and oceanic crust is destroyed. Two plates sliding past each other forms a transform plate boundry
The area around the convergent boundries, continental crust is created then the oceanic crusts were destroyed.
What are land forms?The term land form is used to describe the physical features that describe the geography of any particular area.
Looking at the map, in the area around the convergent boundries, continental crust is created then the oceanic crusts were destroyed.
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As a result of an injury in gallbladder of a person, it had been removed surgically, which of the following processes can be affected by this? *
a. The removal of amino groups of proteins.
B. The digestion of carbohydrates.
C. The breaking down of peptide bonds of proteins.
D. The digestion of fats
Answer:
D
Explanation:
when fatty acid metabolism creates more acetyl-coa than can be handled in the citric acid cycle, the excess acetyl-coa is converted into ________.
Answer:
Ketone Bodies
Explanation:
If excess acetyl CoA is created and overloads the capacity of the Krebs cycle, the acetyl CoA can be used to synthesize ketone bodies.
How does carbon dioxide enter leaves?
What is the role of density changes in a convection cycle
Answer:
Explantion
Convection is heat transfer due to a density differential within a fluid. As water's temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks. ... Air from above the ocean is colder and more dens
Convection is the transfer of heat caused by a density difference within a fluid. Water becomes less dense and rises as its temperature rises in the presence of a heat source.
What is convection?Convection is a method of moving heat that is also known as a heat transfer mechanism. When a fluid, such as air or water, is in motion, heat is transferred. Temperature differences across the fluid drive convection.
Differential heating causes convection currents. Warmer (less dense) material rises, while cooler (more dense) material sinks.
This movement is responsible for the formation of circulation patterns known as convection currents in the Earth's atmosphere, water, and mantle.
Convection is the heat transfer resulting from variations in density within a fluid. In the presence of a heat source, water becomes less dense and rises in density.
Thus, this is the role of density changes in a convection cycle.
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Why does pollution become more than a local problem?
it can kill
Explanation:
The reason it is a universal problem is because it can kill animals and polute the ocean and then clog up a boat engine
IQ is determined by:(1 point)
multiple genes only
both a single gene and environmental factors
a single gene only
multiple genes and environmental factors
IQ is determined by ; ( D ) multiple genes and environmental factors
IQ ( intelligence quotient ) is influenced by more than a single gene ( i.e. multiple genes ) and this makes IQ a polygenic trait found in organisms such as humans.
IQ is not only determined by multiple traits but is strongly influenced by environmental factors just like the multiple genes. IQ measures the intellectual ability of humans ( i.e ability to read and think critically outside the box and also think logically . )
Hence we can conclude that IQ is determined by multiple genes and environmental factors
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Answer:
multiple genes and environmental factors
Explanation:
Is it True or false?
in what ways does transformation play a role in stories meant to scare us essay
Answer:
Transformation can play a big role in frightening stories because transformation in and of itself can be frightening. This process involves the unknown and a loss of control, two things that very much tend to frighten human beings who prefer the familiar and secure.
Hi can someone plss help me with this!!
Explanation:
4. evaporates , ocean
8. transpiration,
9. acid rain
Calculate the kinetic energy of a
30 g bullet fired at 200 m/s.
Step 1: Identify the formula needed to solve this problem.
The formula for kinetic energy (KE) is:
KE = 1/2m~v^2
m = mass
v = velocity
Step 2: Make a list of the values given in the question.
mass (m) = 30 g
velocity (v) = 200 m/s
[tex] \frac{1}{2} m {v}^{2} \\ \frac{1}{2} \times 30 \times {200}^{2} \\ 15 \times 40000 \\ = 600000[/tex]
Answer:
6 × 10⁵ J
Explanation:
Kinetic Energy of a moving mass is defined as, half of the product of it's mass and the square of it's velocity.
[tex] \boxed{ \mathsf{K.E. = \frac{1}{2} m( {v})^{2} }}[/tex]
Mass of the bullet (m) = 30 gvelocity (v) = 200 m/ s[tex] \implies\mathsf{K.E. = \frac{1}{2} \times 30 \times ( {200})^{2} }[/tex]
[tex] \implies\mathsf{K.E. = 15 \times 4 \times {10}^{4} }[/tex]
[tex] \implies\mathsf{K.E. = 60 \times {10}^{4} }[/tex]
[tex] \implies \underline{\mathsf{K.E. = 6 \times {10}^{5} J }}[/tex]
What condition occurs when epidermal cells are created too quickly? a. Acne c. Psoriasis b. Skin cancer d. Chicken pox.
The condition that occurs when epidermal cells are created too quickly is known as psoriasis. In this disease, the cell cycle of skin cells is abnormally accelerated.
Psoriasis is a skin disease associated with itchy patches of thick, red skin, especially in the knees, trunk, and scalp.
Psoriasis is an autoimmune disease caused when the immune system attacks healthy skin cells.
Psoriasis is well characterized by hyperproliferative keratinocytes, which are the most prominent type of cell within the epidermis.
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Identify the main gas that diffuses from the alveolus to the capillary.
Answer:
oxygen
Explanation:
white rami carry _________ neurons, while gray rami carry _________ neurons.
Answer: myelinated preganglionic, unmyelinated postganglionic
Explanation:
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what is most likely the cause of this difference from the rest of the population
Answer:
Gene mutation is most likely the cause of this difference from the rest of the population. Log in for more information.
Explanation:
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Place the stages of photosynthesis in order:
Answer:
First is D
Second is C
Third is B
Fourth is A
1. Transcription happens in the _______ and translation happens at the _________.
a. mitochondria, chloroplasts
b. chloroplasts, mitochondria
c. nucleus, ribosome
d. ribosome, nucleus
2. Proteins are long chains of _________ assembled by _____ bringing them to the ribosomes.
a. nucleotides, mRNA
b. mRNA, nucleotides
c. amino acids, tRNA
d. tRNA, amino acids
3. What are three amino bases on the mRNA strand that codes for a specific amino acid is? What is the complementary bases on a tRNA molecule called?
a. Genetic code, DNA
b. DNA, RNA
c. Codon, anticodon
d. bird, dog
Answer:
1. C
2. C
3. C
Explanation:
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How do animals cause erosion.
Answer:
Some animals weather rocks by scraping them as they feed. Other animals change Earth's surface by burrowing into it and moving material. Too many animals in one place can destroy most of the plants, leading to faster erosion.
If too many animals graze the same land area, the animals’ hooves pull plants out by their roots. A land is overgrazed if too many animals are living there. Grazing animals can cause erosion if they are allowed to overgraze and remove too much or all of the vegetation in a pasture.
Explanation:
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