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3 years ago

Food provides the human body with all of the following but . .

Biology

1 answer:

ratelena [41]3 years ago

8 0

Answer:

C.Hydrochloric Acid

Explanation:

hydrochronic acid is naturally in your stomach to help digest food

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Specialized proteins that act as catalysts for chemical reactions are _____.

VashaNatasha [74]

Enzymes are specialized proteins that speed up chemical reactions, biological catalyst.

4 0

3 years ago

Assume that an organism exists in which crossing over does not occur, but that all other processes associated with meiosis occur

expeople1 [14]

Answer:

The options are missing, they are:

a.The daughter cells of meiosis I would be diploid, but the daughter cells of meiosis II would be haploid.

b.The two sister chromatids of each replicated chromosome would no longer be identical.

c.The four daughter cells produced in meiosis II would all be different.

d.The two daughter cells produced in meiosis I would be identical.

e.There would be less genetic variation among gametes.

f.Independent assortment of chromosomes would not occur.

The correct answer is E, there would be less genetic variation among gametes.

Explanation:

Crossing-over or also called recombination is a phenomenon peculiar to meiosis alone. Meiosis is that kind of division that is employed by sexual-reproducing organisms to produce gamete/sex cells. Crossing-over is a process that may or may not occur, if it does, it occurs in prophase of meiosis I, and it involves exchanging equal chromosomal segments between two non-sister chromatids or homologous chromosomes. Crossing-over is the means by which sexually reproducing organisms use to bring about genetic variation among their species.

It is worthy to note that the non-occurrence of crossing-over does not affect the number of chromosomes as a normal meiotic division will always yield haploid gametes right from meiosis I.

Since crossing-over did not occur, the homologous chromosomes (similar but non-identical chromosomes) will separate into each cell during meiosis I, meaning that each cell will have chromosomes that are either maternal or paternal. This will reduce the chance of genetic variation occuring among species.

7 0

3 years ago

Select the correct answer from each drop-down menu.

Ira Lisetskai [31]

Answer:

Stem cells have the ability to divide <u>through mitosis</u> and produce unspecified cells. Stem cells can be developed into a required tissue because of their ability of <u>differentiation</u>.

Explanation:

A stem cell is a cell that is in an undifferentiated state. This means that it has not specialized in a specific type that carries out a specific function of that tissue, which does not imply that stem cells do not have their own function. The concept of stem cell is due to the ability to originate specialized cells from one or more tissues, depending on the degree of potency or plasticity it has. They are found in all multicellular living organisms. Their main characteristic is that by reproducing through the process of mitosis (they divide into two cells) they can form more stem cells or differentiate, that is, they become specialized cells, in such a way that they are essential for the renewal of cells in different tissues. and to repair them.

5 0

3 years ago

Read 2 more answers

Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square sho

Ira Lisetskai [31]

Answer:

Second Punnett on the first attachment.

Explanation:

In a 4 x 4 Punnett there are a total of 4 squares. Twenty five percent (25%) of 4 is 1. This means that only 1 square out of the 4 should have the genotype that you are looking for.

Okay going at it in a biological sense. Because red eyes is dominant, we know that the allele should be represented by a capital R. It is X-linked, so it should be on the X. The problem is looking for the probability of a male offspring so the combination should be XY (this means the offspring is male, XX is for females).

So taking that all together, you're looking for the genotype combination:

$X^{R}Y$

So you need to find the Punnett that has only 1 square with this combination. The attachment shows which specific Punnett:

6 0

3 years ago

What molecules go into the calvin cycleee

grandymaker [24]

FDAH, ATP, CO2, NADPH

4 0

3 years ago