2. Give reasons for the following:-
a) Why is spore formation in
bacteria not considered a
form of reproduction?
b) Why are proteins necessary
in our food?
c) Why are celis generally of a
small size?
d) Why are Maize plant -
monoecious?
Answers
a)The bacterial spore is formed in response to adverse conditions and constitute a durable form with minimal metabolism which can usually survive starvation. As it is formed from the original cell and no new cell is formed it is not considered reproduction.
b)Proteins are the building blocks of life. Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones.
c)The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. ... That is why cells are so small.
d)Maize plant as monoecious because it consists of both male and female flowers in the same plant. Male flowers present at the top of the plant and female present half way down to the plant.