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4 years ago

After oxygen and hydrogen which element is most abundant in ocean water by mass

Biology

1 answer:

Naya [18.7K]4 years ago

6 0

Sodium chloride is the 3rd most abundant element found in ocean water

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Is a virus made up of cells?

Ksenya-84 [330]

I think that since they actually attach to cells inside the body, they don't count as cells. They're capable of getting in cells, but viruses themselves are actually made up of nucleic acid.

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3 years ago

Stem cells are cells that stay the same and never differentiate into different types of cells.

mamaluj [8]

The answer is false because it is

6 0

3 years ago

Read 2 more answers

Suppose that a biologist states that the average height of undergraduate students at your university is 205 cm plus or minus a s

GrogVix [38]

Answer:

This means that the means height (which is all the sum of the height of all the students divided by their number ) is 205 cm. Standard deviation means how the height of the students deviates from this mean since students do vary in height and are not all the same height of 205 cm. Therefore, in this case, the amount of standard dispersion of the students' height is by 17 cm on either lower or higher side of the mean.

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3 years ago

In Drosophila, the bar mutant is characterized by eyes that are restricted to a narrow, vertical bar. When a bar female is mated

Lelechka [254]

Answer:

See the answer below

Explanation:

a) The mode of inheritance of the bar mutant is X-linked and dominant.

Assuming that barness is represented by the allele B.

Bar female = $X^BX^B$ or $X^BX^b$

Wild type male = $X^bY$

Bar female x wild type male:

$X^BX^B$ x $X^bY$

$X^BX^b$ $X^BY$ $X^BX^b$ $X^BY$

All of the F1 flies are bar because a single B allele is required for the trait to be expressed.

Bar male x wildtype female

$X^BY$ x $X^bX^b$

$X^BX^b$ $X^BX^b$ $X^bY$ $X^bY$

All the female offspring are barred while all the males are wildtype barred resulting in a 50/50 (857/905 is approximately 50/50) ratio of barred/wildtype offspring.

b) Genotypes of each of the cross above, including the parents and the F1 generations.

1. $X^BX^B$ x $X^bY$

$X^BX^b$ $X^BY$ $X^BX^b$ $X^BY$

2. $X^BY$ x $X^bX^b$

$X^BX^b$ $X^BX^b$ $X^bY$ $X^bY$

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3 years ago

If a genotype has two identical alleles that are always expressed is called

aleksandr82 [10.1K]

Answer:

Homozygous

Explanation:

8 0

3 years ago