The process by which new species originate
A. is extinction.
B. occurred for millions of years but is no longer occurring.
C. is speciation.
D. is germination.
E. occurred only once in Earth's history.
C. is speciation.
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In seed plants the embryo develops inside the seed, which allows for:
A. less dispersal of the sporophyte generation. B. the development of dormancy. C. the dominance of the gametophyte generation. D. nutrient reserves for the developing embryo. E. greater protection for the developing embryo. F. the development of dormancy as well as nutrient reserves and greater protection for the developing embryo.
Which of the following represents the proper order of events in embryonic development?
A. fertilization, gastrulation, neurulation, cleavage, organogenesis B. fertilization, cleavage, gastrulation, organogenesis, neurulation C. fertilization, cleavage, gastrulation, neurulation, organogenesis D. fertilization, gastrulation, cleavage, neurulation, organogenesis E. fertilization, gastrulation, cleavage, organogenesis, neurulation
Provide evidence to both support and refute the current existence of life on Mars. What will be an ideal response?
The reason that linked genes are inherited together is that
A) they are located on the same chromosome. B) the number of genes in a cell is greater than the number of chromosomes. C) chromosomes are unbreakable. D) alleles are paired. E) genes align that way during metaphase I.