The enzyme salivary amylase in the mouth breaks down starch into the simple sugar glucose. The mouth has a pH of 7. Salivary amylase will
A. also break down starch in the stomach, which has a pH of 2.
B. be able to break down proteins to amino acids in the stomach.
C. not be able to break down starch in a test tube. It needs to be in the mouth.
D. work at temperatures lower than body temperature (37°C).
D. work at temperatures lower than body temperature (37°C).
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Examination of the amber nuggets on Hispaniola reveals:
A. similar ecological relationships observed on Hispaniola today. B. an abundance of mammal fossils. C. a shortage of insect fossils. D. that every one of the fossilized species are still found on Hispaniola today. E. that none of the insect fossils resemble existing species on Hispaniola today.
Homologous chromosomes ____
a. are found in somatic cells and gametes b. align along the equatorial plane during metaphase II c. are replicated during interkinesis d. contain a maternal and paternal chromosome e. are preserved in each daughter cell produced by meiosis
Which group of plants has two types of xylem tubes, each composed of one cell type, vessel elements?
A. Gymnosperms B. Monocots C. Bulbs D. Early vascular plants E. Angiosperms
A couple conceives a child on January 1st. Which day falls within the period of somitogenesis?
A. January 31st B. January 17th C. January 7th D. January 3rd