Answer:
If both glucose and lactose are both present, lactose binds to the repressor and prevents it from binding to the operator region. The block of lac gene transcription is thus lifted, and a small amount of mRNA is produced.
Explanation:
Explain how the VIH virus uses specific structures to enter the cell
Answer:
When HIV infects a cell, it first attaches to and fuses with the host cell. Then the virus uses the host cell's machinery to convert the viral RNA into DNA and replicate itself. The new copies of HIV then leave the host cell and move on to infect other cells.
what causes blue whales to grow so large
Answer:
Stronger upwelling created the right conditions for baleen whale prey, such as krill and forage fish, to become concentrated in dense patches along coastlines. Whales that fed on these prey resources could forage efficiently and predictably, allowing them to grow larger.
rate brainiest
Which plant structures are common to all angiosperms?
Answer:
All angiosperms produce flowers, reproductive structures that are formed from four whorls of modified leaves. Most flowers have showy petals to attract pollinators, bribing insects and other animals with nectar, to get them to carry the male gametophyte through the air to another flower.
Answer:
spores,flowers,cones,endoskeleton
Explanation:
What functional brain system participates in memory, learning, emotion, and behavior?.
Answer:
Limbic System
Explanation:
The limbic system of the brain is responsible for behavioral and emotional responses.
Match the image with its best description
Answer:
This seems like common sense considering there's no actual terms involved, here it is regardless:
1) D (Tectonic plate boundaries)
2) C (Convergent boundaries)
3) A (Transform boundaries)
4) B (Divergent boundaries)
Why is using bacteria to produce insulin such an exciting prospect?.
Using bacteria to produce insulin such an exciting prospect because insulin is inserted into bacteria's body.
Why is using bacteria to produce insulin such an exciting prospect?Use of microorganism for the production of industrial products is called biotechnology. Insulin is also produced with the help of biotechnology and genetic engineering processes.
So we can conclude that using bacteria to produce insulin such an exciting prospect because insulin is inserted into bacteria's body.
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helloooooooooooooooooooooooooooooooooooo
Answer:
hi
Explanation:
The mutual interdependence that characterizes oligopoly arises because.
We can confirm that the mutual interdependence that characterizes oligopoly arises because the output for a given market is being generated by a small group of companies.
What is oligopoly?Oligopoly is when the market for a given product is controlled by only a few of the companies that create said product. This situation can have benefits as well as drawbacks. A benefit would be increased product variation, providing more choices for consumers, while a drawback would be a lack of competition to keep prices low.
Therefore, we can confirm that the mutual interdependence that characterizes oligopoly arises because the output for a given market is being generated by a small group of companies.
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Could melanin granules be moved by dynein and kinesin along an actin microfilament?.
We can confirm that melanin granules could in fact not be moved by dynein and kinesin along an actin microfilament.
Why can these substances not be moved along a microfilament?This has to do with the fact that these proteins are specific to microtubules, and therefore are not able to move along microfilaments. This is why the dynein and kinesin motor proteins would not be able to transport the granules along microfilaments.
Therefore, we can confirm that melanin granules could in fact not be moved by dynein and kinesin along an actin microfilament.
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Scientists have studied the return of plant life on Mount St. Helens ever since the volcano erupted in
1980. Wildflowers began colonizing the area, followed by shrubs and small trees. Scientists predict
that it will likely take hundreds of years before the area returns to a forest dominated by fir and
hemlock trees. These changes are an example of:
a. humans degrading an ecosystem by removing wildflowers
b. the loss of genetic variation in a plant species
C. the growth of a forest through ecological succession
d. the biological evolution of wildflowers, shrubs, and trees
Answer:
C.
The ecosystem there will definitely go through ecological succession by which the structure of the flora there will evolve over time into forests.
If a cell becomes freely permeable to sodium ions (na ) and is not regulated, what will be the resulting membrane potential?
Since their are more sodium ions outside the cell at test, if a cell becomes freely permeable to sodium ions and is not regulated, the membrane potential will be positive.
What is membrane potential?The membrane potential is the potential difference across a neuronal membrane due to the difference in the concentration gradient of oppositely charged ions.
At rest, the inside of the membrane is negative while outside is positive due to more sodium ions being outside the cell.
Therefore, if a cell becomes freely permeable to sodium ions and is not regulated, the membrane potential will be positive.
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Which of the following is an example of a phenotype?
Answer:
A phenotype is the physical definition of you, what people can see. For instance, when you take a picture, people can see your phenotype through your eye.
Which statement describes one way that roots and leaves interact to transport water through plants?
The flow of oxygen out of the stomata of leaves
stimulates the roots to absorb more water for
photosynthesis.
Wilting leaves send chemical signals to the roots,
causing them to take in water at a faster rate.
The evaporation of water through the stomata of
leaves creates a pull that draws water in through the
roots.
Changes in sugar concentration in the phloem of
leaves causes water to move into the roots by
osmosis.
The statement that describes one way that roots and leaves interact to transport water through plants is: evaporation of water through the stomata of leaves creates a pull that draws water in through the roots.
What is transpiration?Transpiration is the process whereby water is lost from the surface of the leaf into the atmosphere.
A process called transpiration pull facilitates the absorption of water by the root hairs of the plant.
The water then moves via the conducting vessel called xylem to other parts of the plant.
Therefore, the statement that describes one way that roots and leaves interact to transport water through plants is: evaporation of water through the stomata of leaves creates a pull that draws water in through the roots.
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What is the maximum number of seeds of any one type that the seed dispensary can hold?.
Answer:
20 seeds of each plant can be held at a time.
Explanation:
:)
this one aswell haha i dont know any of these
In RNA molecules, adenine is complementary to
Select one:
O a. thymine.
O b. guanine.
O c. uracil.
O d. cytosine.
Is this animal a carnivore or an herbivore? How do its teeth help it obtain food?
Answer:
This animal is a herbivore. The front teeth help it tear off vegetation, and the back teeth help it chew the plants.
Explanation:
A herbivore's back teeth are adapted to help it chew its high fiber plant diet. The front teeth, however, help it actually put the food in its mouth. The picture below shows a typical goat skull (herbivore), and as you can see, it is similar to the one in your problem. So, that skull is one from a herbivore.
In what way is an ecosystem different from than an organism, population, and a community?
Answer:
Ecosystems are made up of all the different living organisms as well as the abiotic elements that affect them. In ecology, the difference between community and ecosystem is that the community refers only to living organisms inside an ecosystem.
Explanation:
Which of the following statements about energy and trophic levels is not true? a. the amount of available energy decreases at each higher trophic level. b. the energy conversion efficiency decreases at higher trophic levels. c. the net production of energy is higher at lower trophic levels. d. none of the above please select the best answer from the choices provided a b c d
All statements are true about the energy and trophic levels. So, the correct option is D. None of the above.
What are trophic levels?Trophic levels are the levels of energy transfer from lower to higher levels.
There are five levels of trophic level.
The lower level contains autotrophs or producers. And the uppermost level contains big animals or tertiary consumers.
The energy level decreases on going to the higher levels because some amount of energy always lapses as entropy.
Thus, the correct option is D.
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Answer: D
Explanation: fr fr
When two alleles are dominant and both are expressed in an individual, what kind of non-Mendelian inheritance is that?
Answer:
Codominance
Explanation:
This case happens when both alleles are dominant then they will be equally expressed in phenotype
I can give you an example to understand this topic such as blood type: in the type AB both A and B are codominant = 2 dominant alleles are expressed together
define biomagnification
[tex]\qquad\qquad\huge\underline{{\sf Answer☂}}[/tex]
Increase of toxic materials in organisms from lower tropical level to higher tropical level in a food web is known as Biomagnification.
your friend has an aquarium with several exotic fish, a turtle and some plants. She is moving and can't take the aquarium with her. Explain why it would not be a good idea to dump them all into the nearby pond.
Answer:
Fish and turtles are living organisms so they should not be thrown in a pond
Explanation:
God created living things and its not nice to kill them we can eat them too but dont kill them they can feel pain too.
ATP is a nucleotide which stores energy, true or false
Answer:
False
Explanation:
Plants help the environment by supplying ________.
Answer:
oxygen
Explanation:
hope this helps
have a good day
Protozoa are often found in what kind of environment?.
The passage of blood from the atria to the ventricles is regulated by which valves?.
Answer:
I believe it is the tricuspid valve
Explanation:
Answer:
Tricuspid Valve
Explanation:
The tricuspid valve regulates blood flow between the right atrium and right ventricle. The pulmonary valve controls blood flow from the right ventricle into the pulmonary arteries, which carry blood to your lungs to pick up oxygen.
What is the renewability of nuclear power?
It is a nonrenewable energy source.
It can use the same fuel cells repeatedly.
It is an unlimited, clean energy source.
It can be replenished, but not by fusion.
Answer: A
Explanation:
Answer: It can be replenished, but not by fusion.
Explanation:
The rabies virus is capable of entering the brain with the blood of a victim of the bite of an infected animal. Propose a mechanism for this to happen.
This is clear demonstration that neurons are not like other cells and that they need a unique environment to thrive and function properly. It also protects neurons from blood-borne proteins, cells and toxic factors.
Genetic change caused by mutations in DNA can lead to?
Answer:
Sometimes, gene variants (also known as mutations) prevent one or more proteins from working properly. By changing a gene's instructions for making a protein, a variant can cause a protein to malfunction or not be produced at all.
Please help me. Fill in the blank with the answer
Answer:
Ribose sugar
Explanation:
Ribose sugar