The most humanlike australopith discovered so far is ____
a. Australopithecus afarensis
b. Australopithecus africanus
c. Australopithecus ramidus
d. Australopithecus sediba
e. Australopithecus kadabba
ANSWER: d
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Suppose you use a dissecting microscope to observe organisms that have colonized discs of densely packed, fibrous wood (Masonite plates) that have been submerged in 6 inches of lake water for 8 weeks. You see insect cases (protective shelters), insect
larvae, and newly emerged insects with wings. You determine that you are looking at an insect species A) that undergoes incomplete metamorphosis. B) that undergoes complete metamorphosis. C) with a body plan of radial symmetry. D) with incomplete digestive tracts.
The outer layer of the mammalian kidney is the ____, and the inner layer is the ____
A. cortex; medulla B. medulla; cortex C. nephron; medulla D. cortex; nephron E. nephron; renal pyramid
Density refers to the
a. average weight of individuals in a population. b. ability of the population to adapt to the environment. c. intelligence of the organism. d. biomass of the population of organisms. e. number of individuals per unit area.
In transduction, two prokaryotic cells of different mating types come together and genetic material is
transferred from one cell to another. Indicate whether the statement is true or false.