Cell shape is determined by which of the following?
A) whether or not the species is pathogenic
B) the way cells move through their media
C) whether or not the species uses a flagellum
D) cell wall and cytoskeleton components
E) the way cells divide
Answer: D
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Mycorrhizae
A. are vital for the survival of lichens. B. are vital for the survival of many plants. C. increase the absorptive ability of roots. D. are used in the production of wine, beer, and bread. E. are vital for the survival of many plants AND increase the absorptive ability of roots.
What would happen to a cell if it failed to complete meiosis II?
a. The cell would have the incorrect number of chromosomes to function properly. b. Crossing over would not occur. c. Independent assortment would not occur. d. Cells do not undergo meiosis II.
Which statement is true of the female gametophyte of pine?
a. It's a product of repeated cell divisions of the functional megaspore. b. It's haploid. c. It serves as the stored food to be used by the embryo sporophyte upon germination. d. All of the above are true.
A hypothetical condition in some domesticated fowl is identified phenotypically by patchy loss of feathers on the animals' backs
Although several factors, genetic and environmental, are found to be involved, only about 3% of any population with any of these factors are found with feather loss. Which of the following is a likely cause? A) continuous variation B) threshold of liability C) low mutation frequency D) high number of alleles in one of the genes E) high number of environmental effects