Nearly all organic substances enter plant cells by ________.
A. Osmosis
B. Diffusion
C. Symport
D. Stomata
E. Antiport
Ans: C. Symport
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Vessel elements must be thinner and shorter than tracheids because they lack the structural integrity to support large angiosperm trees
A. true B. false
Sister chromatids ______
a. are separated during anaphase I b. have different alleles for the same genes c. are replicated before meiosis I and II d. are replicated before meiosis II e. have identical DNA sequences
Which of the following sub-disciplines of
biology focuses on understanding the entire genetic composition of organisms?
a. evolutionary biology b. molecular biology c. genomics d. comparative anatomy e. embryology
Bees are currently suffering from disease, and population numbers are decreasing. What is a likely consequence for flowers if this continues?
1.There would be no need for stamens for pollination, so flowers would evolve with just carpels.
2.Other insects would take over the role of pollination for the plant.
3.Plants could go extinct if there isn’t any pollination by other organisms.
4.The plant would be forced to rely on wind for pollination.