Which of the following is NOT a true statement regarding the prothallus?
a. It produces eggs.
b. It results from a spore that lands on moist soil and grows.
c. It is the free-living haploid life stage of a fern.
d. It produces sperm.
e. It has a conical structure.
Ans: e. It has a conical structure.
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When chromosomes fail to separate during meiosis, what is this called?
a. translocation b. non-disjunction c. inversion d. deletion
If the DNA nucleotides read ATG-CGT-GAC, the
amino acid sequence of the resulting polypeptide would be a. tyrosine – alanine – leucine. b. methionine – arginine – asparagines. c. histidine – glycine – praline. d. serine – lysine – glycine. e. all of these.
Which of the following U.S. agencies oversees phase testing of drugs prior to their approval for clinical uses?
A) USDA B) EPA C) FDA D) NIH E) NSF
Living things are highly ordered. So why does life not violate the second law of thermodynamics?
A) Life gives off energy to maintain order and, in doing so, decreases order elsewhere. B) Life only needs to follow the first law of thermodynamics. C) Life takes in energy to maintain order and, in doing so, decreases order elsewhere. D) Life can only violate the first law of thermodynamics.