Angiosperms are most closely related to _____.
a) bryophytes
b) seedless vascular plants
c) green algae
d) gymnosperms
e) charophyceans
Ans: d) gymnosperms
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Couples who are at risk for passing on alleles for cystic fibrosis, muscular dystrophy, or other genetic disorders can eliminate this risk by opting for ________
a. preimplantation diagnosis b. amniocentesis c. chorionic villi sampling d. fetoscopy
The first evidence of linkage between human genes was for two genes found to be located on
____________________. Fill in the blank(s) with the appropriate word(s).
A sterile mule is produced by mating a horse and a donkey. From this observation you could conclude
A. that horses and donkeys are the same species. B. that horses and donkeys are different species. C. that mules are a result of macroevolution. D. increasing the number of mules in a population will affect the allele frequency in the next generation. E. the DNA sequences of horses and donkeys are more than 97% identical.
Bacterial decomposition of organic nitrogen results in the production of:
a. ammonia. b. nitrates. c. nitrites. d. atmospheric nitrogen. e. urea.