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kramer
3 years ago
11

Before the Industrial Revolution (top picture), the bark of the trees was

Biology
1 answer:
-BARSIC- [3]3 years ago
5 0
This is an example of evolution through natural selection. The peppered moths started off with a light color scheme when the industrial revolution started, and they had this to blend into the trees. The better the moths could blend in, the less likely they were to be preyed upon. Once the trees changed colors, the light moths were vulnerable. The months that thrived in this change were the darkly colored moths. These moths then bred and spread their dark color pattern to best fit into the new environment.
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Who would the double pour technique be a preferred method of fabricating a cast/study model
vodomira [7]

Answer:

Prevents distortion

Explanation:

Double-pouring technique is used for casting, it prevents distortion of the material to be fabricated or the study model.

It ensures the study or fabricated model is firmly withheld, increasing the material life span, and can be used at extreme conditions.

This type of technique takes longer time to set than the single pour method as it gives the needed base to yeild the oral structures.

4 0
2 years ago
Which of the following outcome would be most likely if the proteins emmbedded in a cell membrane became unable to function prope
Andreas93 [3]
C) The Cell Would Be Forced To Divide as substances continued to build up inside the cell
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3 years ago
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Which plants are the first to grow during primary succession?
ludmilkaskok [199]

Answer:

mosses

Explanation:

Simple species that can tolerate the often- harsh environment become established first. These organisms help enrich the soil, allowing other species to become established. The first organisms to appear in areas of primary succession are often mosses or lichens.

6 0
2 years ago
Refer to the Biochemistry in Focus section of your text for this chapter to answer this question. Sarin inhibits acetylcholinest
DENIUS [597]

Answer:

c. Pyridostigmine binds to the acetylcholinesterase active site and prevents sarin from binding to and modifying the enzyme active site.

Explanation:

Sarin is a toxic compound which inhibits acetylcholinesterase enzyme. This enzyme degrades the neurotransmitter acetylcholine after the required muscle cell stimulation. In absence of its activity, acetylcholine is not degraded and the muscle cells are stimulated uncontrollably. The muscles are not able to relax which ultimately proves fatal for the victim.

Pyridostigmine is also an acetylcholinesterase inhibitor like Sarin. However its period of inhibition is short compared to organophosphorus inhibitors like sarin. It competes with sarin and replaces it in the active site of acetylcholinesterase. The enzyme is still inhibited but for a shorter time as compared to inhibition by Sarin. Hence after sometime, it becomes functional again and resumes its normal activity. Acetycholine starts getting degraded relaxing the muscles.

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2 years ago
What rule is used to join the free nucleotides to the exposed bases of the dna
Rashid [163]
<span>Complementary base-pair rule.</span>
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3 years ago
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