#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: 4974
#Unit 11. Evolution and Behavior
Which of these is the most likely explanation for the modern-day distribution of dicynodont fossils?
#Question id: 11984
#Unit 10. Ecological Principles
#Question id: 19186
#Unit 13. Methods in Biology
#Question id: 11806
#Unit 6. System Physiology – Plant
sap is translocated from areas of supply, called
sources, to areas of metabolism or storage, called sinks. Which of the
following statements about source and sink are TRUE?
a.) Sinks include any nonphotosynthetic organs of the
plant and organs that do not produce enough photosynthetic products to support
their own growth or storage needs
b.) Sources include exporting organs that are capable
of producing photosynthate in excess of their own needs
c.) During the growing season of the first year,
storage root is a sink, when it accumulates sugars received from the source
leaves. During the second growing season the same root becomes a source
d.) Roots, tubers, developing fruits, and immature
leaves, which must import carbohydrate for normal development, are all examples
of sources tissues
Find the correct combination of the source and sink pattern of translocation.