NEET BIOLOGY

PLANT PHYSIOLOGY

PLANT GROWTH

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A very small and smooth pollen grain with a very low mass would be expected to have which dispersal method?
A
water
B
animals
C
insects
D
wind
Explanation: 

Detailed explanation-1: -Fungal spores and pollens can be dispersed in a number of ways: by animals and insects; by water; by wind or by rain.

Detailed explanation-2: -Pollen grains are smooth, small and light, which makes it easier for the wind to carry the pollen grains to long distances.

Detailed explanation-3: -A mature ovule consists of a food tissue covered by one or two future seed coats, known as integuments. A small opening (the micropyle) in the integuments permits the pollen tube to enter and discharge its sperm nuclei into the embryo sac, a large oval cell in which fertilization and development occur.

Detailed explanation-4: -The anther usually contains four pollen sacs which are responsible for producing pollen grains. Each pollen grain is a single cell containing two male gametes. Once mature, the anther splits open and pollen is released.

There is 1 question to complete.