The so-called robust australopithecines are:a
the earliest members of the genus Australopithecus.
b. the line that gave rise to the genus Homo.
c. the hominids that developed from Ardipithecus.
d. a dead-end branch in hominid evolution.
e. an extinct line of hominoids that existed about 6?7 million years ago.
D
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Which of the following describes when a species that is not divided by any geographic barrier evolves into separate species within the same location?
a. gene flow b. founder effect c. sympatric speciation d. allopatric speciation
Body cells of human males contain _____
a. one X chromosome b. two X chromosomes c. one Y chromosomes d. two Y chromosomes e. one X and one Y chromosome
Recessive disorders related to genes found on the X chromosome but not on the Y are more commonly expressed in ________
A) children B) adults C) females D) males
Which graph in Figure 7.3 best depicts the effect of placing the culture in an autoclave for 15 min. at time x?
A) a
B) b
C) c
D) d
E) e