What is the most reasonable conclusion that can be made from data graphed in the figure? 
A. After high mortality early in life, survivorship becomes constant for the rest of life.
B. After following a constant rate early in life, mortality becomes low late in life.
C. Survivorship is constant throughout life.
D. After low mortality early in life, mortality increases to a constant rate for the rest of life.
Answer: D
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Embryonic stem cells derived from blastocysts are pluripotent, and therefore useful in stem cell research because they
________. a. are viable under a wide range of laboratory conditions b. do not replicate and are therefore stable long-term c. can form all cells, tissues, and organs of the human body d. are specialized and therefore arrested in G0 e. function to replace damaged or diseased body parts in adults
Gene targeting:a
requires individuals that are homozygous for the knockout gene in every cell. b. is usually studied in organisms in which the knockout gene is homozygous in only one cell type. c. involves the study of knockout genes in the embryo-derived stem cells of mice. d. is a fairly rapid process since it is conducted entirely in vitro. e. involves the excision of the target genes, which are then "knocked out."
The reactivity of an atom depends on the number of
a. protons. b. neutrons. c. electrons. d. valence electrons. e. protons and neutrons in the nucleus.
Shade-grown coffee in mixed polycultures is a good example of _________________.
A. terracing B. a genetically modified crop C. agroforestry D. biomimicry E. Both C and D are correct.