Answer:
(a) energy source, either sunlight or chemicals
Explanation:
Answer:
Diffusion is critical in the body for the transport of liquids, such as oxygen from the air into the blood and carbon dioxide from the blood into the air in the lungs, or glucose from the blood to the cells.
Explanation:
Answer:
Mendel choose pea plant (Pisum sativum) for his experiment due to following reasons:
(i) availability of contrasting traits of several characters.
(ii) Their life span is short.
(iii) Normally self-pollination occurs but cross-pollination can also be done by artificial means.
(iv) Large no of seeds produced.
The chromosomes are made up of one long strand of DNA.