21.

During photosynthesis

• both CO₂ and water get oxidized

• both CO₂ and water get reduced

• water is reduced and CO₂ is oxidized

• CO₂ gets reduced and water gets oxidized

The order of occurrence of the cytochromes in the F₁ particle is

• cyt-b, cyt-c, cyt-a-cyt a₃

• cyt-c, cyt-b, cyt-a-cyt a₃

• cyt-a, cyt-b, cyt-c-cyt a₃

• cyt-a₃, cyt-a, cyt-c-cyt b

Storage leaves occur in

• Allium

• Zizyphus

• Triticum

• Trapa

Tube-within-a-tube body plan is shown by

• coelenterates

• platyhelminthes

• aschelminthes (nemathelminthes)

• porifers

True coelom appeared first in the course of evolution in

• Aschelminthes

• Chordata

• Echinodermata

• Annelida

The cell organelles are found in

• bacterial cells

• cyanobacterial cells

• prokaryotic cells

• eukaryotic cells

Intracellular compartments are not found in the cells of

• lower plants

• prokaryotes

• higher plants

• eukaryotes

Spindle chromosomes have

• centriole

• kinetochore

• chromocentre

• chromomere

Adrenal gland is derived from

• ectoderm

• mesoderm

• endoderm

• both (a) and (b)

Which endocrine gland becomes inactive in old age

• Adrenal

• Thymus

• Pineal

• Pituitary