14. What two things limit the size of cells?

1 answer:

4 0

14. Surface Area , and Volume Area limits the size of cells.

15 .A cell is a metabolic compartment where a multitude of chemical reactions occur. The number of reactions increase as the volume of metabolic volume within a cell increases. (The larger the volume the larger the number of reactions)
All raw materials necessary for metabolism can enter the cell only through its cell membrane.
The greater the surface area the larger the amount of raw materials that can enter at only one time.
Each unit of volume requires a specific amount of surface area to supply its metabolism with raw materials. The amount of surface area available to each unit of volume varies with the size of a cell.
As a cell grows its SA/V decreases.
At some point in its growth its SA/V becomes so small that its surface area is too small to supply its raw materials to its volume. At this point the cell cannot get larger.

16. Cells only divide when they receive specific signals from proteins called mitogens,the presence of mitogens can limit cell division. Mitogens are needed for cell division in healthy cells and are released depending on what cells the body needs.

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WILL UPVOTE RIGHT ANSWERS

otez555 [7]

As UCG is for serine !
UGU for cysteine
CGU for argenin
GUC for valine !

so the answer is D !

7 0

3 years ago

he percentage of newborns that will develop behavioral difficulties that could be connected to behavioral teratogens is approxim

koban [17]

Answer:

20 percent

Explanation:

There are some conditions and agents which can impair prenatal development and lead to birth defects or even death knows as teratogens. For example, viruses, drugs, stressors, and malnutrition. Teratogens that can harm the prenatal brain, affecting the future child's intellectual and emotional functioning know as Behavioral teratogens. These increase the risk of harm to developing children. Some can influence the effect of teratogens.

1. Timing--- at which phase of pregnancy, developing organism exposed to the teratogen, either in 1st, 2nd or 3rd trimester.

2. Exposure-- at what dose or frequency of exposure of the teratogen, newborn is going to expose.

3. Genetic variability-- genetic makeup of newborn makes her more susceptible to the effect of a teratogen.

According to literature, 20 percent of behavioral teratogen can affect the newborn.

7 0

3 years ago

Which of the following statements is true about the chromosomes in animal cells?

Kisachek [45]

Q. Which of the following statements is true?

A. Chromosomes occur in pairs in higher plants and animals.

B. There are more chromosomes in a cell than there are genes.

C. All organisms have the same number of chromosomes.

D. A karyotype cannot determine if an organism is male or female.

Answer:

A karyotype cannot determine if an organism is male or female. Thus, the correct option is D.

<h3>What is karyotype?</h3>

A person's entire set of chromosomes is known as their karyotype. The phrase can also refer to an image created in a lab showing a person's chromosomes separated from one cell and organized in numerical order. A karyotype can be used to check for chromosomal number or structural problems.

Males and females may have different karyotypes. For instance, human females have two X chromosomes while males have an X and a Y chromosome in their karyotype. Body (somatic) cells and egg and sperm cells have different karyotypes (gametes).