In zoo animals, inbreeding often occurs because of a lack of a sufficient pool of breeding individuals. Under such conditions, which two characteristics are often exhibited among inbred organisms?
What will be an ideal response?
higher frequency of aberrant phenotypes and higher mortality rates
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The term polymorphism refers to the phenomenon that a trait displays variation within a population. Which of the following is an example of polymorphic trait in a population?
A. The A, B, O blood types found in humans. B. The loss of hair in elderly animals that are malnourished. C. The pink or white flowers of the four o'clock flower, both pink and white individuals are prevalent. D. Both the A,B,O blood types in humans and the pink and white flowers of the four o'clocks. E. Both the A,B,O blood types in humans and the loss of hair in elderly animals that are malnourished.
When acetylcholine stimulates the opening of ligand-gated ion channels on a postsynaptic cell, what is this event called?
A. neuromuscular junction B. temporal summation C. inhibitory postsynaptic potential (IPSP) D. excitatory postsynaptic potential (EPSP) E. synaptic integration
Linking Microbiota and Obesity
What will be an ideal response?
When water moves from soil into the vascular tissues inside the root, it can take three possible pathways. Of these, the apoplastic route is _____.
a. through plasmodesmata b. through aquaporins on the plasma membrane c. between cells and through cell walls d. by active diffusion across the plasma membrane