Ripened ovary turns into fruit and ovules turn into seeds.
Answer:
Killer T cells release enzymes that help destroy invading foreign matter (antigens), Helper T cells, on the other hand, stimulate another type of lymphocyte known as B cells. B cells produce antibody, which is a protein made in response to a specific antigen.
The thorax is a very vital and important organ in the human body.
- It is a structure that serves as a<u> </u><u>protective covering</u> for organs in the body such as<u> the lungs, the heart, some vital blood vessels</u> e.t.c
It is<u> false</u> that to <em>make a person breathe in, the volume of the chest cavity must decrease, creating a higher pressure in the thorax.</em>
- When a person breathes in, <u>the chest cavity expands (the volume increases) and the pressure in the thorax decreases.</u>
- When a person breathes out, <u>the chest cavity decreases in size, and the pressure in the thorax increases. </u>
- Therefore, we can see that the <u>process of breathing in humans</u>, follows the <u>principle of Boyle's Law.</u>
- Boyle's law states that as the<u> volume increases there is a decrease in pressure</u> and <u>as the volume decrease there is an increase in pressure. </u>
Therefore, It is <u>false</u> that to <em>make a person breathe in, the volume of the chest cavity must decrease, creating a higher pressure in the thorax.</em>
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There are 5 levels of cell organization recognized by biologists.
C X-inactivation "switches off" one of the X chromosomes.
Explanation: