Answer:
d. Epithelial tissues are nourished by blood vessels in adjacent tissues, thus diffusion is limited to thin tissues.
Explanation:
Epithelial tissues have tightly packed cells and have no space for blood vessels to be present between adjacent epithelial cells. The cells of the epithelial tissues get nutrients from the blood vessels of neighboring connective tissues.
Since the exchange of nutrients between the cells of the epithelial and connective tissues occurs through diffusion, epithelial tissues are only one to few cells layers thick to allow nutrient supply to all of its cells.
<h3><u>Answer;</u></h3>
Meiosis is called reduction division <u>because number of chromosomes in daughter cells is reduced to half than that of parent cell.</u>
<h3><u>Explanation;</u></h3>
- Meiosis is a type of cell division that takes place in the germ-line cells, it involve division of a parent cell into four daughter cells.
- The process of meiosis involves two divisions of the genetic material, namely; meiosis I and meiosis II.
- <em><u>The first division is called the reduction division or meiosis I, this is because it reduces the number of chromosomes from 46 chromosomes or 2n to 23 chromosomes or n.</u></em>
Answer:
control group
Explanation:
In manipulative studies, it is necessary to have an experimental group and a control group.
Processes by which organisms produce food
