The technique used to accomplish cloning in vertebrates is called
A. gametic cell nuclear transfer.
B. somatic cell nuclear transfer.
C. recombinant technology.
D. in vitro fertilization.
B. somatic cell nuclear transfer.
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In principle, a type II restriction endonuclease with an 8-nucleotide recognition sequence should cut 1 in every 48 nucleotide positions
Indicate whether the statement is true or false.
The central nervous system of vertebrate animals consists of
A. the brain. B. the spinal cord. C. all nerves in the body. D. nerves originating at sensory receptors. E. the brain and spinal cord.
A squirrel living in a park bisected by a busy street passes on a mutation to its offspring that allows them to judge the speed and distance of passing cars more accurately based on the vibration they cause in the ground. Over several generations, the percentage of squirrels expressing this mutation increases equally on both sides of the street. What principle does this demonstrate?
a. founder effect b. genetic drift c. microevolution d. equilibrium
Which statement about tropical forests is true?
A) Tropical forests occur in equatorial regions with very long (16- to 20-hour) days. B) Tropical forest structure consists of distinct layers that provide many different habitats. C) Once stripped, tropical rain forests regrow quickly, although with slightly less diversity. D) The soils of tropical rain forests are typically rich in nutrients.