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3 years ago

Most cells fall within the range of 5-20 microns. What factors keep the size of the cell within these boundaries?

Biology

1 answer:

Tema [17]3 years ago

7 0

Answer: Cytoplasm and organelles

Explanation:

Normally, a cell cannot attain a size greater than 20 microns due to the limits imposed by the size inter-relationships of its components. For example, there is a relationship between the amount of nuclear material and the size of a cell; this limits cells to a size where there is an optimal proportion of nuclear material to the rest of the cell.

Hope this helps :) and can I please get a brainly

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A population of 100 tigers has 30 with horizontal stripes. Using pedigrees, you ascertain that horizontal striping is caused by

bixtya [17]

Assuming that this population is in Hardy-Weinberg equilibrium, we can sayt that the probability that, given enough time, all tigers in the population will have horizontal stripes is 30% = 0.3.

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Available data:

Population size, N = 100 tigers
Number of Tigers with horizontal stripes = 30
Horizontal stripes is caused by an autosomal recessive mutation.

We need to know the probability that all tigers in the population will have horizontal stripes, which is the recessive phenotype.

We assume that the population is in Hardy-Weinberg equilibrium, so there should be no evolution.

Since the population is in H-W equilibrium, the allelic, genotypic and phenotypic frequencies will remain the same generation after generation.

Now, we will calculate the allelic and genotypic frequencies of horizontal striped individuals in the population.

There are 100 individuals, and only 30 have horizontal stripes.

So, the phenotypic frequency, F(HS) is 30/100 = 0.3 = 30%

Since this is a recessive phenotype, this value equals the genotypic frequency, F(hh) = 30%

Finally, we can get the allelic frequency by taking the square root of this value.

F(hh) = q² = 0.3

f(h) = q = √0.3 = 0.55 = 55%

According to these calcs, the probability for the fixation of the recessive allele is 55%, and the probability that all individuals express the recessive horizontal stripes phenotype is 30%.

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You can learn more about Hardy-Weinberg equilibrium at

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2 years ago

Where are coral reefs most threatened by pollution, and what effects has pollution had so far?

NeTakaya

Answer:

In the great barrier reef

Explanation:

It has effected plants and sea creature populations because of their homes being destroyed

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2 years ago

2. What process is shown in the diagram in Figure 28.1

Murrr4er [49]

Embryonic development

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Saliva contains an enzyme that breaks down _____. sugar starch fat protein

AlexFokin [52]

Saliva contains an enzyme that breaks down STARCH.
The digestion process usually starts in the mouth. The saliva contain an enzyme called ptyalin, which act on the starch in the eaten food and break it down to simple sugars. This enzyme is secreted by the salivary gland and it helps in the pre digestion of starches.

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3 years ago

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The fibrous protein responsible for the structure of hair and wool is

Ann [662]

Keratin

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3 years ago