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STALIN [3.7K]
3 years ago
11

Which of the following statements is not true about the Grand Canyon

Biology
1 answer:
gtnhenbr [62]3 years ago
7 0

Answer:

the grand canyon is older than the rocks in its wall hope it helps

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What large flat muscle moves up and down in order to bring air in and out of the lungs?
Brrunno [24]
The diaphragm is the large flat muscle. hope that helps :)
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3 years ago
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Knowing that some individuals from Island 1 colonized Island 2, biologists sample the Mainland and two Island populations fifty
raketka [301]

Answer:

The evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect.

Explanation:

Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time and eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster -bottleneck effect- or because of a population split -founder effect-. In <u>founder effect</u>, a new population originates when a few individuals who are coming from a bigger population carrying its genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, <u>genetic variability is reduced</u> and there exists the possibility of developing a peculiar allelic composition. If the number of individuals that originated the new population is low, the founder effect will be very extreme, because the effects of the genetic drift are inversely proportional to the original number of individuals.  

<em>In the exposed situation, the evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect. The fact that both islands are similar in their frequencies might be due to little genetic variation on island 1, or because dispersion to island 2 is a recent event on time. </em>

5 0
2 years ago
Which statements correctly explain why biological productivity in the tropical ocean is so meager when compared to biological pr
Anni [7]
<span>The answer to this question would be: 
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- The sunlight penetrates deep into the tropical ocean, warming the surface waters and creating stratification of water masses.

In tropical lands, the area is getting sunlight all around the year. This will cause the plant to be able to do photosynthesis all around the year too. Sunlight can penetrate the ocean, but the intensity will be much lower in deeper part. The ocean also become warmer but it will become cold in the deeper part too. </span>
3 0
3 years ago
Define synapsis. In what stage does it occur?
OLEGan [10]

SYNAPSIS: also called syndesis

the fusion of chromosome pairs at the start of meiosis.

synapsis takes place during prophase I of meiosis.

Hope this helps have a good day.....

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3 years ago
"Tryptophan self-controls its synthesis." Justify this statement.
miskamm [114]
Just say we have a big amount of tryptophan in the sense that it exceeds, tryptophan would act as a co-repressor which prevents synthesis of more enzymes for its production

Hope this helps :)
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