In a dehydration synthesis reaction, macromolecules are built when ________ is removed to form a covalent bond
A) oxygen
B) an electron
C) an amino acid
D) water
E) carbon dioxide
Answer: D
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The antifungal drug that can be used to treat serious systemic fungal infections is ________.
A. amphotericin B B. metronidazole C. sulfa drugs D. griseofulvin E. nystatin
In 1986, a nuclear power accident in Chernobyl, USSR (now Ukraine), led to high radiation levels for miles surrounding the plant
The high levels of radiation caused elevated mutation rates in the surviving organisms, and evolutionary biologists have been studying rodent populations in the Chernobyl area ever since. Based on your understanding of evolutionary mechanisms, which of the following most likely occurred in the rodent populations following the accident? A) Mutations caused major changes in rodent physiology over time. B) Mutation led to increased genetic variation. C) Mutation caused genetic drift and decreased fitness. D) Mutation caused the fixation of new alleles.
The structure that carries the egg cell from where it is produced to the uterus is the
A. uterine canal. B. oviduct. C. ductus ovalis. D. vagina.
Which organisms undergo alternation between haploid and diploid generations?
a. all plants b. all animals c. all bacteria d. all fungi