Why is it difficult to find intermediate fossils in organisms that have evolved under the punctuated
equilibrium model?
What will be an ideal response?
Evolutionary change in these organisms has been so rapid that relatively few intermediate individuals
lived, and so were unlikely to have been fossilized.
You might also like to view...
Refer to Figure 45.8 in your textbook. Which of the statements below about foraging behavior is not correct?
A. Levels of for mRNA are significantly higher in foragers compared to nurses. B. cGMP and cAMP, cyclic nucleotides, were used as activators of cGMP-dependent protein kinase. C. cGMP but not cAMP was capable of activating kinase in nurse bees who then showed a significant increase in foraging behavior. D. cAMP was capable of activating a kinase that increased nurse bee behavior in foragers. E. The increase in nurse bee foraging was directly related to the dose of cGMP.
Bacteria described as being coryneform have which of the following morphologic features?
a. Squared rods with squared ends arranged in pairs b. Short gram-positive cocci in branching chains c. Resemble and are often referred to as Chinese letters d. Long branching gram-positive bacilli
The sliding filament model
a. supplies the energy needed for muscle contraction. b. provides a flexing action for the muscle fibers. c. describes the action of the actin and myosin in a muscle cell. d. explains muscle fatigue. e. only explains how muscles contract, not how they relax.
Which of the following describe the placenta? (Check all that apply.)A) The bloods of the mother and the embryo come in close contact without mixing.B) The placenta neutralizes toxins like alcohol and drugs before they reach the fetus.C) Oxygen diffuses from the mother to the embryo.D) Carbon dioxide diffuses from the embryo to the mother.E) The placenta provides nourishment and hormones to the embryo.F) The antibodies made in the embryo protect the mother from infections.
What will be an ideal response?