Reptiles resemble __________ in being able to
__________.
a. ray-finned fishes; freely leave the water
b. birds; breathe by use of lungs
c. ostracoderms; utilize their jaws
d. amphibians; exchange gases across their skin
e. lobe-finned fishes; exchange gases across their
gills
Answer: b
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Protobionts are thought to be the first nonliving structures that evolved into living cells. A critical characteristic of a protobiont that is found in both modern day prokaryotes and eukaryotes is
A. internal compartments that subdivide metabolic functions. B. a boundary membrane that separates external from internal environments. C. the ability to exclude all organic substances. D. the ability to fuse with any other protobiont for reproduction. E. the ability to recognize other protobionts for developmental purposes.
Who is responsible for the first concept regarding the passing on traits or characteristics that were acquired during the
lifetime of an organism to its offspring? a. Charles Lyell b. Charles Darwin c. Alfred Wallace d. Thomas Malthus e. Jean Baptiste de Lamarck
Why was Charles Darwin initially puzzled by the observation that worker bees die when they sting an intrud-er to their hive? (The bee's stinger is ripped from the bee's abdomen, causing a fatal injury.)
a. All defensive behaviors result in the guaranteed destruction of the defender. b. Such self-sacrifice is widespread in many different groups of animals. c. He found it hard to imagine how such behavior could evolve, as a defending worker's chance of survival is zero. d. The stinging apparatus appeared to be too complex to have evolved.
Combination therapy for HIV is based on the assumption that it highly unlikely for multiple simultaneous mutations to cause resistance to each of the drugs used.
Answer the following statement true (T) or false (F)