The embryo develops into a fetus while it is within the
A. ovary.
B. cervix.
C. vagina.
D. uterus.
D. uterus.
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All of the following are true about this image EXCEPT:
a. DNA replication has occurred. b. One pair of homologous chromosomes is present. c. The trait represented is heterozygous. d. The genotype is either pp or PP.
A situation in which the birth rate equals the death rate is called:
a. an intrinsic limiting factor b. exponential growth c. saturation d. zero population growth e. geometric growth
Cell cycles of early embryonic animal cells are unusual because they have
a. no G1 or G2. b. an elongated G1 and G2. c. a short S. d. a much shortened M.
Freshwater lakes in temperate regions will turn over in the ____.
A. fall only B. winter only C. spring only D. summer only E. fall and spring