During sexual reproduction, each parent contributes one set of chromosomes. Members of a pair of chromosomes (one from each parent) are called __________
A. karyotypes
B. sister chromatids
C. homologs
D. sex chromosomes
C
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Top-down factors that can control the population sizes of plants or animals include
A. seed-dispersing birds. B. parasites and predators. C. widespread phoresy. D. resource partitioning. E. Batesian mimicry.
We can accurately determine the age of a rock or fossil by measuring its ____
a. proton concentration b. electron concentration c. neutron concentration d. isotope concentration e. ion concentration
Describe how a scientific hypothesis is different from a scientific theory.
Extensive data from hospitals have shown that infants born with intermediate weights
are the ones most likely to survive. This is a classic example of which type of selection? a. directional selection b. stabilizing selection c. disruptive selection d. natural selection e. no selection