Plant Anatomy and Physiology MCQ question and answer with solution | Biology Gk MCQs

For the protection from toxic effects of molecula O₂, cells possess the cellular organelles called

Drought enduring plants like species of Acacia are

The lichens, mycorrhizae and nitrogen fixing organisms have been classified under

First compound which is fixed during photosynthesis is

With reference to the movement of molecules of fluid in plant, consider the following statements.
1. Diffusion is the movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration.
2. Osmosis is a process in which the water molecules move through a semipermeable membrane from the region of their lower concentration to the region of their higher concentration.
Which of the statement(s) given above is/are correct ?

Plants contain a variety of sterols like stigmasterol, ergosterol, sitosterol etc which very closely resemble cholesterol. These plant sterols are referred as

Assertion (A) Reproduction is the process by which living organisms produce young ones of their species.
Reason (R) Sex organs, male and female, are mandatory for reproduction.

Which of the following pair represent the Correct pair of reproductive parts of a flower?

Consider the following statements regarding double fertilization and choose the correct answer:
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo

Consider the following statements and choose the correct answer:
1. Evaporation is a vital physiological process
2. Transpiration is restricted to living bodies only
3. Evaporation is as low loss of water molecules to the unsaturated atmosphere from the free exposed surface among living and non-living bodies
4. Transpiration is simply a loss of water molecules which do not involve any pressure