Which of the following is not paired correctly?
A. endoderm: kidneys
B. ectoderm: posterior pituitary gland
C. mesoderm: circulatory system
D. endoderm: liver
E. ectoderm: nervous system
A
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Which of the following is an example of an organism’s niche?
a. a tortoise that lives on the African savannah eating grasses and living in deep burrows b. the thick mane of a male lion c. the camouflage coloration of zebras as they stand in the shade of acacia trees d. a flock of turkey vultures
Which one of the following is needed to synthesize a new strand of DNA?
A) lipids B) glucose C) amino acids D) nucleotides E) ribose
Meiosis I produces ________, and meiosis II produces ________ cells.
A. two haploid, 4 haploid B. two somatic, two gametic C. two haploid, two haploid D. two diploid, 4 haploid E. two diploid, two haploid
The unexpressed regions of split genes are called ________.
A. codons B. introns C. exons D. endons