Biology Mcqs

If bile pigments are prevented from leaving digestive tract, then they cause_____________?

A. Hepatitis
B. Jaundice
C. Gall stones
D. Blockage

Double fertilization is feature of____________?

A. Ferns
B. Whisk ferns
C. Gymnosperms
D. Angiosperms

Alternation of generations is absent in___________?

A. Hydration
B. Obelia
C. Jelly fish
D. Physalia

The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called______________?

A. Ovule
B. Seed
C. Fruit
D. Embroyo sac

Pollen grains in us have __________ for dispersal through wind?

A. Flagella
B. Cilia
C. Wings
D. Feathers

Pox viruses are_________?

A. RNA non-enveloped
B. RNA enveloped
C. DNA non-enveloped
D. DNA enveloped

Destruction of all life forms is called___________?

A. Sterilization
B. Disinfection
C. Antisepsis
D. Preservation

Reverse transcriptase is present in____________?

A. All RNA viruses
B. All DNA viruses
C. All retroviruses
D. All viruses

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

A. Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones
B. Older sediment layers have less amount of these reaioactive isotopes as that of the young ones.
C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.
D. Older sediment layers did not have these radioactive isotopes

Bacteria which grow either in the presence or absence of oxygen___________?

A. Aerobic bacteria
B. Anaerobic bacteria
C. Facultative bacteria
D. Microaerophilic