At which point on a cladogram do two species share an ancestor?
A. taxon
B. Node
C. Tip
D. Branch
Ans: B. Node
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The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats
Which of the following is most directly involved in the evolution of these variations in metamorphosis? A) artificial selection of sexually immature forms of insects B) changes in the homeobox genes governing early development C) the evolution of meiosis D) the development of an oxidizing atmosphere on Earth E) the origin of a brain
All EXCEPT which one of the following are
the reasons for the rapid population explosion of humans? a. increases in carrying capacity b. expansion into new habitats c. removal of limiting factors d. reproduction occurring earlier in the life cycle e. none of these
Compared to mammals that are not adapted for diving, diving mammals _______
A. have larger lungs B. always keep blood flowing to their lungs during a dive C. can store more oxygen in their muscles D. use gills for gas exchange
By the end of the 21st century, it is expected that the human population will:a
increase at the fastest rate in the highly developed countries. b. increase at the fastest rate in the less developed countries. c. increase at similar rates in all countries. d. decrease at similar rates in all countries. e. achieve zero population growth.