The branch points on a cladogram represent ____
a. the species' extinction
b. derived characters
c. related clades
d. a common ancestor of two lineages
e. mass extinctions
ANSWER: d
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When patient tissues are transfected with viruses carrying a needed, normal human gene, the technique is called ________.
A. gene therapy B. DNA fingerprinting C. cloning D. antisense therapy
The duct between a testis and a seminal vesicle used for the transport of sperm is the ____________________. Fill in the blank(s) with the appropriate word(s)
Based upon today’s molecular evidence, Homo sapiens appear to have originated from:a
Europe. b. Indonesia. c. East Africa. d. South Africa. e. South America.
One way in which distributions of populations and species have been responding to climate change is by shifting
A) to lower elevations. B) toward the poles. C) toward the equator.