Differentiate between the following pairs of terms :
(a) Radicle and plumule.
(b) Hilum and micropyle.
(c) Testa and tegmen.
Answers
a) Radicle and plumule.
Radicle: In a seed the radicle lies downwards near the lower pointed end of the grain. It gives rise to the root.
b.) Hilum is a scar on a seed that shows the connection between the ovule and ovary while micropyle is a pore that shows the point from which the pollen tube entered the ovary during fertilization.
c.) Testa is the outer covering of the seed whereas tegmen is the covering which lies under the testa.
Testa provides protection from bacteria and natural sources whereas tegmen directly cover the seed and gives protection
4.)The functions of the fruit is to protect the seed inside and aid in its dispersal. Some fruits harden to make accessing the seed difficult. Many fruits promote wind dispersal.
Answer:
Radicle and plumule
Explanation:
Radicle- It forms root system
It is the lower part of a seed
Plumule- It forms shoot system
It is the upper part of a seed