What can we learn about evolution from biogeography?
What will be an ideal response?
The continents are now in positions that are very dissimilar to conditions millions of years ago. This explains the similarity of some large, extinct mammals found in South America to some of the large, living mammals in Africa. The flightless birds found on varying continents illustrate the same idea.
Analyze and Evaluate the Concepts (Essay)
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Which of the following is not associated with adhesive junctions?
A) desmosomes B) hemidesmosomes C) plaques D) connexin E) cadherins
In some G-protein-coupled-receptors, cyclic AMP (cAMP) acts as a(n)
1.first messenger. 2.second messenger. 3.effector. 4.protein kinase. 5.extracellular signal.
Chewing is important because it
A. alters the food chemically. B. adds enzymes that cause starch, proteins, and fats to begin to be broken down. C. increases the surface area exposed to the action of enzymes. D. is required by your mother.
Which of the following statements regarding Neisseria meningitidis is FALSE?
A. There are vaccines available to prevent infection with all strains. B. Up to 40% of the population are carriers. C. Humans are the only natural carriers. D. Transmission is via respiratory droplets. E. It often causes meningitis.