Chromosomal aberrations:
are more harmful than point mutations.
involves gene deletions or relocations, but not duplications.
are changes to the overall organization of genes on a chromosome.
occur when a base pair is inserted or deleted.
occur when one base pair in the DNA is substituted for another.
are changes to the overall organization of genes on a chromosome.
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Which of the following evidence obtained from fossil studies is generally accepted as marking the beginning of the hominids?
A. large brain development B. walking upright C. bipedalism D. development of lower limbs longer than forelimbs E. manufacture and use of tools
An agent that causes genetic mutations is called __________
a. a carcinogen b. cancer c. a virus d. a malignant tumor
Small birds must eat more frequently than large birds in order to maintain their body temperature. This is because:
A. large birds are cold-blooded. B. small birds are cold-blooded. C. small birds have a lower surface area to volume ratio than large birds. D. small birds have a higher surface area to volume ratio than large birds.
Which of the following statements concerning endocytosis is TRUE?
A) This process occurs in both prokaryotes and eukaryotes. B) Phagocytosis is a type of endocytosis in which liquids are brought into the cell. C) Endocytosis produces a structure called a food vesicle. D) Waste products and secretions are exported from the cell during endocytosis. E) Endocytosis is a form of passive transport.