During ____, microtubules fasten the cell's chromosomes to the spindle poles.
A. prophase I
B. anaphase II
C. metaphase I
D. metaphase II
E. telophase I
Answer: A
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The collars on the cells of choanoflagellates have the function of:
A. protecting the flagellum B. filtering bacterial food from the water C. directing currents away from the flagellum D. storing waste materials of the cell E. attaching to the substrate
Plant embryos grow into seedlings by adding new cells at only two growth points which are called:
A. parenchyma cell points B. collenchyma cell points C. sclerenchyma cell points D. vascular cell points E. shoot and root apical meristems
What microbe is responsible for crown gall disease in plants and is used to create transgenic plants incorporating Ti vectors?
A) Thermus aquaticus B) Agrobacterium tumefaciens C) Bacillus thuringiensis D) Escherichia coli E) Saccharomyces cerevisiae
What information can be inferred about genes that are located on different chromosomes?
A) These genes are inherited independently of each other. B) Only the dominant alleles of these genes tend to be inherited together. C) These genes are always inherited together. D) These genes are more likely to undergo mutation.