In Himalayan rabbits, the ears, feet, and muzzle are pigmented while the rest of the body is white. This is because they express an enzyme variant that is ineffective at body temperature but functions at the lower temperatures experienced by cells of the extremities. This is an example of:

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#Question id: 13018

#Unit 10. Ecological Principles

Generalized global air circulation and precipitation patterns are caused by

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#Question id: 23923

#General Aptitude

A thermodynamic function of state which is constant during a reversible isobaric isothermal process is:

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#Question id: 11211

#Unit 7. System Physiology – Animal

The following steps refer to various stages in transmission at a chemical synapse.

1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.

2. Calcium ions rush into neuron's cytoplasm.

3. An action potential depolarizes the membrane of the presynaptic axon terminal.

4. The ligand-gated ion channels open.

5. The synaptic vesicles release neurotransmitter into the synaptic cleft.

Which sequence of events is correct?

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#Question id: 20003

#Unit 12. Applied Biology

In plants proline is preferentially produced from ornithine under normal conditions. However, under stress it is made directly from 

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#Question id: 16102

#Unit 7. System Physiology – Animal

When the temperature of environment is above 34 degrees, the only heat loss mechanism is