Transformational evolution on the population level has been rejected as a process of evolutionary change. Yet, at the macroevolutionary level, transformational change is a potential mechanism for an active evolutionary trend
Can you reconcile this potential contradiction?
What will be an ideal response?
ANS:
Even though the mean of phenotypic values for different species shift transformationally into the same direc-tion, the positive selection within each species causing the shift is still variational.
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Which of the following is an organelle in plant cells that stores starches, fats, and proteins?
a. plastid b. mitochondria c. parasite d. fungi
The normal vital capacity for a male is
a. 1000 milliliters. b. 2000 milliliters. c. 4800 milliliters. d. 3800 milliliters. e. 5200 milliliters
When a photon is absorbed by a pigment (light-absorbing molecule), such as chlorophyll, the energy of the photon is transferred to
A) D1 protein to activate PSII. B) ATP synthase to make ATP. C) an electron to move it from a low to a high energy orbital. D) Plastocyanin to be passed on to PSI. E) NADP+ to make NADPH.
Some insecticides interfere with the removal of acetylcholine from the synaptic cleft. What effect will this have on muscle contraction?
A) The muscle cell will be unable to be stimulated again. B) The muscle cell will be in a state of constant stimulation, leading to a tetany response. C) The muscle cell will lose all of its supply of calcium. D) The muscle cell will have a single twitch and will be unable to contract again.