For some seeds to germinate,
a. they must first be exposed to a critical low
temperature for a certain length of time.
b. they must be exposed to proper environmental
conditions of temperature and moisture.
c. something must remove the restrictive seed coat.
d. something must remove the hormones that
promote dormancy.
e. all of these must occur.
Answer: e
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Mode of inheritance reflects
A) whether a gene is on an autosome or sex chromosome and whether the allele is recessive or dominant. B) whether the allele is transmitted from the male or the female. C) the number of genes that determine a trait. D) the size of the chromosome that includes the gene in question and the sex of the parent transmitting it.
_____ are inorganic substances with metabolic roles that no other substance can fulfill
a. Fats c. Vitamins b. Minerals d. Simple sugars
What aspect of the geology of the Galápagos was important in producing the diversity of organisms seen by Darwin?
A) The islands are in the Pacific. B) The islands are in a chain. C) The islands are very dry. D) There are no mammals on the islands.
Silent copies of genes that have been inactivated by mutations are called
A. exons. B. clones. C. introns. D. pseudogenes.