BIOLOGY HIGH SCHOOL

Colorado has a vast population of lodgepole pines. A population of lodgepole pines have been killed in a section of the forest. What is a possible limiting factor of that population?

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Answer 1
Answer:

I just took the test, the answer is A ) Devastation by the pine bark beetle
Answer 2
Answer:

Answer:

A

Explanation:

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Members of which two domains of life are composed of one or more prokaryotic cells?

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Domain Archea and domain Bacteria

19. A material with a shape that remains unchanged when it is moved from one container to another is a(n)________

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I think that the best word to fill into the gap is "solid".


Solid comes in opposition to other fundamental states of matter: liquid, gas, plasma (the last one can be characterized by high electric conductance).

Only the proteins that the bacteria Escherichia coli (E. coli) needs are synthesized at any given time. For example, when lactose is available in the environment, E. coli will express the lac genes that allow it to break down lactose to obtain energy. When lactose is not present, these genes are not expressed.This prevents the lac genes in the DNA of E. coli from being expressed most of the time.
A. the lac repressor
B. the lac operator
C. the lac promoter
D. the lac locator

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The correct answer is A. Lac repressor.

Lac repressor prevents lac gene which are found in the DNA of Escherichia Coli from being expressed for many times.

Lac repressor is termed as DNA which binds proteins. It allows the expression of genes from coding which are made for proteins to be involved in metabolism of lactose which is in bacteria.

When there is no lactose which is available in the cell, then the genes are being repressed. Lactose are being converted to allolactose if they are available.
The lac repressor prevents the lac genes in the DNA of E. coli from being expressed most of the time. The answer to your question is A. I hope this is the answer that you are looking for and it comes to your help.

Explain how producers, consumers, and decomposers obtain the energy they need.

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Answer:

Producers obtain energy from sunlight, consumers obtain energy from producers, and decomposers obtain their energy from dead living beings.

Explanation:

Producers produce their food by themselves as they are autotrophic. They obtain mostly their food and energy from the light energy comes from the sun, by the process of photosynthesis.

Consumers are depending on producers for their energy and food. They get energy from producers they eat as food and convert energy from it.

Decomposers get their food or energy by decaying dead living beings or other organic matter. They change these organic matter to energy.
Producers get the energy they need from the sun. Consumers get their energy from the plants and animals that they eat. Decomposers get energy from eating dead plants and animals.

Traumatic injuries, such as that suffered by Christopher Reeves (an actor that portrayed Superman years ago) can affect a variety of functions of the body. The dysfunctions are dependent upon the level in the spinal cord the damage occurred and what aspect(s) of the cord is damaged. In this posting, you are to describe the organization schemes of the spinal cord (both anterior-posterior as well as internally).

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The spinal cord is divided into 31 segments with 31 pairs of nerves exiting the cord - 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal nerve.
In respect of internal structure of the cord, there are white matter in the periphery and gray matter inside. In the center there is a thin canal filled with cerebrospinal fluid.

Mimulus lewisii and Mimulus cardinalis are two plants that occupy the same habitat but do not interbreed in nature. However, they can be readily crossed in the laboratory to produce fertile offspring. Which of the following is a likely reason that prevents interbreeding of these plants in nature?A(They only reproduce by self–pollination.
B(They have incompatible gametes.
C(They show seasonal differences in flowering.

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C(They show seasonal differences in flowering.
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