#Question id: 12714
#Unit 6. System Physiology – Plant
|
COLUMN I (environmental factor ) |
COLUMN II (primary effects) |
COLUMN III
(secondary
effects) |
|
A)
Water deficit |
i)
Hypoxia, Anoxia |
a)
Membrane dysfunction |
|
B)
High temperature |
ii)
ROS production |
b)
Reduced cellular and
metabolic activities, Leaf abscission, Ion cytotoxicity and Cavitation |
|
C)
Trace element
toxicity |
iii)
Photo inhibition |
c)
Reduced
respiration, Fermentative metabolism, Inadequate ATP production , ROS production and Stomatal closure |
|
D)
Flooding and soil
compaction |
iv)
Membrane
destabilization |
d)
Inhibition of PSII
repair |
|
E)
Chilling |
v)
Cell dehydration and
Hydraulic resistance |
e)
Disruption of
metabolism |
|
F)
High light intensity |
|
f)
Photosynthetic and
respiratory inhibition, ROS production |
#Question id: 34151
#Unit 7. System Physiology – Animal
#Question id: 12388
#Unit 7. System Physiology – Animal
#Question id: 3398
#Unit 11. Evolution and Behavior
Genetic drift in a small population for multiple generations can significantly affect the composition of a population’s gene pool. Following some observation are given for reason of Genetic drift?
A) Small populations are threatened by a loss of genetic variability. This loss may be caused by inbreeding, genetic drift, and limited mating.
B) Sampling error can arise is through the founder effect, which is due to the limited matting within population
C) Genetic drift arises is through a genetic bottleneck, which develops when a population undergoes a drastic reduction in population size.
D) Variance in allele frequency due to genetic drift will be maximal when one allele is very rare and the population size is small.
Which of the above observation are true?
#Question id: 23593
#Unit 13. Methods in Biology