Question: 7
Presence of metameric segmentation is the characteristic of phylum
A. Protista
B. Porifera
C. Cnidaria
D. Annelida
E. Platyhelminthes
Correct Answer: D. Annelida
Explanation:
Metameric segmentation is the division of body into a number of similar segments. Metameric
segmentation is generally exhibited by phylum Annelida and phylum Arthropoda.
Question: 8
A process by which an egg undergoes a series of rapid cell divisions without cell growth or
gene expression is called
A. Apoptosis
B. Acrosome reaction
C. Cortical reaction
D. Cleavage
E. None of the above
Correct Answer: D. Cleavage
Explanation:
Cleavage is a series of rapid cell divisions without cell growth or gene expression. The organisms are
formed by growth and development of these cells. The different cells formed from cleavage are called
as blastomere. The compact mass of blastomere is called morula.
Question: 9
Which of the following is mixotropic?
A. Yeast
B. Dinoflagellates
C. Amoeba
D. Mushroom
E. Blue- green algae
Correct Answer: B. Dinoflagellates
Explanation:
A mixotroph is an organism that can utilize different forms of energy. Dinoflagellates are flagellated
mixotropic protists. They combine photosynthesis with ingestion of prey. Yeast, amoeba and
mushroom are heterotrophic. Blue- green algae is autotrophic.