Comprehension Passage
Pollen grains, which vary in size, shape, color, and design across species, are generally spherical. They have a distinctive two-layered wall. Pollen grains consist of two cells. Pollen formation begins with microsporogenesis. Pollen can trigger severe allergic reactions, such as asthma.
Identify the correct statements regarding pollen grain viability:
Identify the correct statements regarding pollen grain viability:
A) The viability period of pollen grains is influenced by temperature and humidity.
B) In rice and wheat, pollen grains remain viable for several hours after release.
C) In members of Rosaceae, Leguminoseae, and Solanaceae, pollen grains can remain viable for months.
D) Pollen grains can be stored for years in liquid nitrogen at -196°C
1
A, B, C
2
A, C, D
3
B, C, D
4
A, B, D