#Question id: 12959
#10. Ecological Principles
#Question id: 8841
#9. Diversity of Life Forms
Adaptive radiations can be a direct consequence of four of the following five factors. Select the exception.
#Question id: 19870
#13. Methods in Biology
#Question id: 16121
#7. System Physiology – Animal
Match the following mechanisms (Column I) with their correct example (Column II).
Column I |
Column II |
A. Heat-generating and heat-retaining mechanisms |
i. increased metabolic rate (thyroid hormones, sympathetic nervous system) |
B. Heat-dissipating mechanisms |
ii. vasodilation of blood vessels of the skin
(decreased sympathetic tone) |
|
iii. increased activity of sympathetic cholinergic
fibers to sweat glands. |
|
iv. shivering |
|
v. vasoconstriction of blood vessels of the skin (increased
sympathetic tone) |
#Question id: 9595
#6. System Physiology – Plant
The process is that the absorbed photon causes an electron rearrangement in the reaction centre chlorophyll, followed by an electron transfer process in which part of the energy in the photon is captured in the form of