Which of the following is not one of the ways we can study grass evolutionary history?
A. Study the fossil record because grasses
fossilize very well.
B. Study the high-crowned teeth that help
mammals browse on grass.
C. Study the organic compounds
incorporated into the phytoliths in the grass
cells.
D. Study special compounds formed as a
result of C4 photosynthesis.
A
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The heart chamber that passes blood to the lungs is the
A. left ventricle. B. right ventricle. C. right atrium. D. left atrium.
Which of the following is the cancer of epithelial cells?
A. sarcoma B. lymphoma C. leukemia D. carcinoma E. myoloma
In a certain plant species, thick-shelled seeds are caused by the dominant allele T. Thin-shelled seeds are caused by the recessive allele t. What is the genotype of an individual with thin-shelled seeds?
A) TT B) tt C) Tt D) tt or Tt
A fomite is _________ that can transmit disease.
A) a vector B) an animal C) an inanimate object D) a cough or sneeze droplet