Which of the following cells is NOT haploid?
a. secondary spermatocyte
b. sperm
c. primary oocyte
d. spermatids
e. polar bodies
C
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Digestive secretions with a pH of 2 are characteristic of the _____
A) small intestine B) stomach C) pancreas D) liver E) mouth
Your friend has never gardened before. When none of the seeds he planted germinate, he asks you to suggest why. Which is the best explanation of what occurred?
A. The monocot seeds he used were only able to produce a single cotyledon each. B. The seeds were planted too deeply and used up their reserves before reaching the surface and sunlight. C. The suspensor failed to develop into an embryo within each seed. D. All seeds require fire in order to germinate. E. Seeds take more than one season to germinate.
Which of the following is a similarity between bryophytes and seedless vascular plants?
A. They both contain lignin. B. They both alternate generations between gametophyte and sporophyte. C. They both have no vascular tissues. D. They are both independent of water for reproduction.
Which of the following are NOT seed-bearing
plants? a. cycads b. ferns c. ginkgos d. angiosperms e. conifers