Which of the following is a type of treatment for cancer?
A. Removing the tumor through surgery
B. Removing the tumor through radiation therapy
C. Chemotherapy
D. All of the above are ways that cancer can be treated
Answer: D
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If a gene has two alleles, and allele A has a frequency of 83%, then allele a has a frequency of ____
Fill in the blank with the appropriate word.
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 transport process requires ATP utilization?
a. active transport b. osmosis c. diffusion d. facilitated diffusion e. diffusion through a channel
Birds are able to sustain long flights at high altitudes because they
A) can extract oxygen during both inhalation and exhalation. B) decrease their heart rate during flight. C) use anaerobic metabolism during flight. D) have thicker blood than other animals, with many more red blood cells. E) are able to lower their body temperature during flight.