Category: Biology Mcqs

A. i & ii
B. iii & iv
C. i ii iii & iv
D. iv only

A. Leaves respire and utilize O2 and release CO2.
B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.
C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.
D. Rate of respiration becomes more than rate of photosynthesis.

A. 7
B. 12
C. 5
D. 4

A. Its short thick branched horizontally growing rhizome
B. Fibrous adventituous roots arise from the lower side of rhizome
C. Shows heteromorphic alternation of generation
D. Stipe (stalk) and rachis of leaf have black smooth and shiny hair like structures

A. Alveoli
B. Air sacs
C. Bronchi
D. Parabronchi

A. Population
B. Community
C. Biome
D. Habitat

Potential energy means?

A)due to position of object

B)due to motion of object

C)due to gravity

D)non of these

A. mitochondria
B. nucleus
C. chromosomes
D. ribosomes

A. Primary wall
B. Secondary wall
C. Middle lamella
D. All of these

A. Louis Pasteur
B. Edward Jennar
C. Leuvenhoek
D. Alexander Fleming