In birds, if the offspring require extensive care, usually involving both the male and female, they are called
A. sympatric species.
B. semelparous species.
C. altricial species.
D. precocial species.
E. iteroparous species.
Answer: C
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What process can lead to an individual having too many or two few chromosomes?
A. Nondisjunction B. Homologous recombination C. Crossing over D. Independent assortment
There are numerous fish genera that have individuals that can change their sex during their lifetime. What is this called?
A. sequential hermaphroditism B. sequential sex determination C. sequential parthenogenesis D. sequential production of gametes E. sequential fertilization
How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?
0 because mRNA has only anticodons 6 27 9 3
Infection with some Salmonella enterica serotypes can progress to typhoid fever when the bacteria
A) attach to cells of the small intestine. B) induce endocytosis by intestinal cells. C) reproduce within cells of the small intestine. D) produce type III secretion system proteins. E) enter the blood and are engulfed by phagocytes.