Experimentally heating amino acids and exposing them to water resulted in ________
a. living cells
b. protocells that could capture energy, concentrate materials, and replicate themselves
c. denatured proteins
d. proteins identical in sequence to some found in modern animals
b
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The relatively shallow part of the ocean extending from the low tide mark to the edge of the continental shelf is called the
A. surface zone. B. abyssal zone. C. neritic zone. D. littoral zone. E. limnetic zone.
A person with an autosomal recessive disorder generally has how many copies of the dominant allele?
a) Two, on the X chromosome b) Two c) Zero d) Two, on the Y chromosome e) One
The most accurate description of an organism with genotype AaBb is
a. homozygous dominant. b. heterozygous. c. heterozygous dominant. d. homozygous recessive. e. heterozygous recessive.
Passive immunity can provide immunity ____
a. temporarily b. permanently
c. for months d. for many years e. for an entire lifetime