Diffusion, pinocytosis, carrier-mediated transport, and transcellular transport are the mechanisms that control the movement of molecules across membranes.
What is diffusion ?Diffusion is the overall net movement of anything from a higher concentration to a lower concentration. A gradient in the Gibbs free energy or chemical potential drives diffusion.
The process by which cells take in molecules by engulfing them is known as endocytosis. The substance to be carried is caught in a little invagination that the plasma membrane forms that extends inward.
The terms "concentration gradient," "pressure gradient," and "temperature gradient" are used to describe changes in concentration, pressure, and temperature over a given distance. The Latin term diffundere, which meaning "to spread out," is the root of the English word diffusion.
Thus, Diffusion, pinocytosis, carrier-mediated transport, and transcellular transport are the mechanisms that control the movement of molecules across membranes.
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Use two examples for plants to explain how the development of new technologies such as radioisotopes has increased our knowlegde of reactions in plants.
Answer: The radioactive isotopes can be used to track many physiological functions and chemical reactions occurring within the cells of the living organisms including plants.
Explanation:
Phosphorus uptake by the plants: Phosphorus is an essential mineral required by the plants for their growth and metabolism. The radioactive phosphorus-32 can be used to track back the rate at which the plant absorbs the phosphorus from the soil. This can help scientists to identify plants that can absorb phosphorus more quickly.
Pesticides levels in the plants: The pesticides levels in the plants can be traced by using radioisotopes such as chlorine-36. This can be used to trace the fact that how much of pesticide is present in the soil and how much of it is utilized by the plants. This is helpful identifying the fact that which pesticide is useful for the growth of the plants.
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Cystic fibrosis is one of the most common genetic diseases in America. It is estimated
that 1 in 23 Americans are carriers for Cystic Fibrosis. Cystic Fibrosis is a recessive trait
that follows Mendel's Law of Dominance.
Answer ALL parts of the free response below - be sure to use vocabulary and explain your
response in detail:
A. Explain what Mendel's Law of Dominance means
B. Explain how 2 parents who do NOT have Cystic Fibrosis could have a child with cystic
fibrosis.
Answer:
a.When an organism is heterogeneous for a trait, it expresses only the dominant allele
b. A child will be born with CF only if they inherit one CF gene from each parent. A person who has only one CF gene is called a CF carrier. They are healthy and don't have the disease. But they are a carrier of the disease.
Explanation:
a.In other words, the dominant trait always masks the recessive trait.
b.A parent can be a CF carrier, and pass the CF gene on to their child.
Study the image, and then choose the statement that best describes the image.
Answer:
The nitrogen system aka what we have
Explanation:
When tectonic plates are colliding, what is the geological event that will NOT occur at a convergent boundary?
Question 2 options:
Mountains
Volcanoes
Volcanic Island
Rift valley
The thin outer shell of Earth is broken into large pieces which is called as tectonic plates. Rift valley is not the event of collision between tectonic plates.
What is rift valley?Rift valley is the low land between highlands and mountain ranges created by geographical rift.
These can be formed on both land and deep oceans, where they are made by seafloor spreading process.
It is caused when two tectonic plates moves apart from each other.
Thus, the correct option is D.
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Can raccoons eat Newts and salamanders?
Answer:
yes
Explanation:
What are the yellow arrows showing . Please no links :) ill mark brainlest if you give correct answer
Answer:i am not 100 percent sure but i think the yellow arrows are showing the wasted carbon
Can someone please correct me or tell me if I’m correct please that will be lovely
Answer:
A
Explanation:
Destruction of habitat is not going to preserve the habitat.
Multiple sequence alignment is a method that can be used to compare three or more biological sequences to determine homology and evolutionary relationships between species. This is done by selecting a target protein or DNA sequence (consensus) and comparing it across other species’ sequences. Conservation is a statistical analysis that describes how much the target sequence is observed across the selected group of species. A higher conservation score indicates that the protein or gene is more ancient or more critical across species.
Construct a cladogram using the multiple alignment of a protein sequence found below.
Answer:
here is the answer key
Explanation:
Which of the following is NOT a way that fungi
reproduce?
A. asexually through spores dropping and growing
B. a piece of the hyphae breaks off, lands, and starts growing
C. the spores travel by wind to a different mushroom that gets
fertilized and sprouts a new mushroom
D. the hyphae of a plus and minus fungi come together and the
nuclei fuse and start to grow together
List the four codes for RNA and show how they are paired.
Answer: adenine (A), uracil (U), guanine (G), and cytosine (C). When this base-pairing happens, RNA uses uracil (yellow) instead of thymine to pair with adenine (green) in the DNA template below.Bases. ... The four bases that make up this code are adenine (A), thymine (T), guanine (G) and cytosine (C). Bases pair off together in a double helix structure, these pairs being A and T, and C and G. RNA doesn't contain thymine bases, replacing them with uracil bases (U), which pair to adenine1.
Explanation:
endocrine glands are called ductless gland give scientific reason
Answer:
their secretions reach the blood directly without ducts
What is the name for all the plants and animals that live together in a habitat?
Answer:
Biotic community
Explanation:
Definition of biotic :living organisms in the ecosystem .Example Frog,fish,and etc.
Definition of Abiotic: Nonliving things in the ecosystem. Examples wind,water,and etc.
Help me please!
What information can be gained about the structure and function of plants by ring barking?
Answer:
About its different layers and their functions in the plant body.
Explanation:
By studying the structure and function of the plants by ring barking, we find out that the ring barking is very important for the plant because it provides support as well as protection to the inner part of the stem against environmental conditions such as temperature and intense light etc. These barks are responsible for the storage of water which can be used during drought conditions. This ring barking provides information about different layers of stems such as periderm, cortical and phloem tissue that has a specific function in the plant body.
a. If you were designing a pigment to maximize light capture in a new kind of solar array what light absorbing properties would have?
b. what molecule in the sumary equation for photosynthesis ends up in the sugars made by photosynthesis?
c. When Jasmine was a baby, her parents planted a jasmine plant weighing 1 kg in a container in their yard with 50 kg of soil. When Jasmine was 18, the plant was estimated to weigh 75 kg. Then it was time to transplant the plant into the family yard so it could continue growing. When the soil in the container was weighed, its mass was 50 kg. Over the years Jasmine's parents neither added nor removed soil from the container with the plant in it. How did the plant increase in mass by 74 kg while the soil did not change in mass and never needed adding to over the years?
Answer:
Following are the solution to the given points:
Explanation:
In point a:
When a light absorption dye was to be introduced to optimize the plant's absorbing capacity, the paint could absorb wide different wavelengths besides the observable light spectrum. It must also absorb the UV only at IR light rate to maximize the fluorescence intensity.
In point b:
Its molecule in the production of pentose sugar is the nitrogen and hydrogen atoms of carbon dioxide and water ions of air. Its water oxygen atoms are emitted through oxygen atoms during this phase.
In point c:
Its plant increased with weight while decreasing the weight of the earth, so because manufactured goods needed for plant growth are carbon dioxide from water and air, provided to a plant every day and nitrogen extracted from of the atmosphere through means of microbial materials into nitrogen. So, even if the plant raised its weight, the soil does not change the weight.
Flowers are the ______________ structures of plants.
A. meiosis
B. reproductive
C. motosis
Answer:
B. reproductive
Explanation:
Answer: reproductive
Explanation: flowers contain the reproductive organs of a plant, the stamen (male) and/or pistil, (female)
How does nectar increase the ability of plants to reproduce?
Answer:
nectar is very sweet juice which attracts insects.
when those insects suck the nectar the pollen grains sticks to the body of those insects and then when they fly and sit on the other flowers and then those pollen grains are then transferred to the stigma of that flower which then forms a zygote and then forms a new flower.
and this is how nectar helps to reproduce
A scientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. Which biological component would be best to use as a model for the pill’s function?
bacteriocytes
phagocytes
complement system
antibodies
Answer:
thx but the answer is D
Explanation:
A pill formulated to attack a specific type of bacteria that infects the throat would best follow the operations of antibodies.
What are antibodies?Antibodies are chemicals produced by the immune system of the body in response to external attacks by foreign substances.
In other words, antibodies are like weapons deployed to defend the body from external attacks.
A pill designed to attack a specific type of bacteria that infects the throat will be most effective if it follows the operations of antibodies.
Since different antibodies are produced for different external invasions, the pill will also be most effective by being specific in its actions.
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Humans have 46 chromosomes in each of their body cells. Jason has a small cut on his right arm and his body cells are undergoing mitosis to repair the damage. How many chromosomes will be in each new body cell after cell division?
Answer:
23
Explanation:
How are photosynthesis and cellular respiration connected as a cycle?
Answer:
Photosynthesis is when energy, carbon dioxide and water react to produce glucose and oxygen. It is an endothermic reaction (takes in more energy than it gives off).
glucose + oxygen + (energy) → carbon dioxide + water
C 6 H 12 O 6 + 6 O 2 → 6 CO 2 + 6 H 2 O
Respiration is the process of producing energy from glucose. It uses glucose and oxygen to give water, carbon dioxide and energy (thus making it exothermic).
carbon dioxide + water + energy → glucose + oxygen
6 CO 2 + 6 H 2 O → C 6 H 12 O 6 + 6 O 2
As you can see from the equations, they are essentially the reverse of each other.
Another difference is how they are used. Respiration occurs in the mitochondria of all living cells, whereas only plants photosynthesize.
In plants, they make their own glucose using the sun's energy, then respire to allow them to use the glucose for the energy they can use. The glucose can also be stored and used in many other ways other than in respiration.
How is the lower respiratory system related to the
circulatory system?
The lower respiratory system moves oxygen
into the blood; the circulatory system delivers
blood to the body.
The lower respiratory system delivers blood
to the body; the circulatory system moves
oxygen into the blood.
The lower respiratory system moves oxygen
into the blood; the circulatory system delivers
air into the lungs.
Answer:
b
Explanation:
Answer:
It's A
Explanation:
Fossil fuel dependence has an impact on which of the following?
A)
the environment
B)
economics
C)
poverty
D)
international security
E)
all of the above
How do viruses reproduce during the lysogenic cycle?
During which stage of the cell cycle do Mitosis and Cytokinesis occur? (I will give brainliest?
Answer:
Mitosis occurs in Interphase and cytokinesis occurs in Anaphase
Explanation:
The elephant reproduces
sexually. If the parent cells
have 38 chromosomes, how
many chromosomes do the
elephant sex cells have?
Answer:
5 sex cells
Explanation:
4.) The more different kinds of living things in an ecosystem the more successful it is. This is called ___________.
use this vid https://youtu.be/-Sybgof-X2k
Answer: isn’t it climax community?
Explanation:
Many scientists are worried that the increased amount of carbon dioxide in Earth's atmosphere will _____
A. make it harder for animals to breathe
B. use up all our fossil fuels
c. cause Earth to warm up unnaturally
D. make green plants grow too fast
For anybody with this question
Here is your answer
1
3
4
Below shows a process that occurs in cells. The type of building blocks represented by the letters A, B, and C in this process are:
A: Nucleotides
B: Codons
C: Amino Acids
D: Nitrogen bases
Most non-vascular plants are small because they-
A. Can only transport water short distances
B. Have thick leaves
C. Usually grow in deserts
D. Are unable to perform photosynthesis
PLEASE HELP I NEED THIS ASAP!!!
Answer:
A. Can only transport water short distances
Explanation:
Nonvascular plants are very short because they cannot move nutrients and water up a stem
Hope this helps! =w=
A significant shift in the environmental conditions over a very short period of time caused most groups of dinosaurs to become extinct because of their inability to adapt fast enough. This allowed for a variety of niches to open providing current organisms new opportunities. Mammals were one group of organisms that took advantage of this environmental change, filling niches that were unoccupied and eventually developing new species that were specifically adapted to their particular environment. Which of the following is a term that most correctly describes this process?
A. Adaptive radiation
B. Gradualism
C. Convergent evolution
D. Genetic drift
Answer:
A. Adaptive radiation
Explanation: