Each gramme of water transpired absorbs _______ kj of latent eat from the leaf and its environment:
A.2.0 – 2.1
B.2.2 – 2.3
C.3.4 – 3.5
D.2.7 – 2.8
Category: Agriculture Plant Physiology Mcqs
Direct sunlight at noon in late June in the northern hemisphere corresponds to _____ foot-candles:
A.5,000
B.7,500
C.10,000
D.12,000
When yeast and certain bacteria carry on anaerobic respiration they produce:
A.Carbon dioxide
B.Nitrogen
C.Water
D.Oxygen
The Singer and Nicholson model of plasma membrance differs from Robertson’s model in the:
A.Arrangement of lipid layers
B.Arrangement of proteins
C.Absence of proteins in the singer model
D.Number of lipid layers
The total thickness of unit membrane fall in the range of:
A.7 – 10
B.70 – 100
C.700 – 1000
D.7,000 – 10,000
Functions and vital activities of the plants are studied under:
A.Ecology
B.Cytology
C.Physiology
D.Morphology
If a cell is placed in a solution and the cell shrinks, the solution is:
A.Clear
B.Isotonic
C.Hypotonic
D.Hypertonic
Mitochondria were seen first in:
A.1850
B.1900
C.1940
D.1975
Soil water that is available to plants seldom has water potential more negative than:
A.3.0 MPa
B.? 1.5 MPa
C.? 2.0 MPa
D.? 2.5 MPa
