10. In the phylogenetic tree to the right, taxa next to \"A have two membranes a

Question

10. In the phylogenetic tree to the right, taxa next to "A have two membranes around their chloroplasts, whereas taxas next to "B" have four. This difference is because: a. the ancestors of "B" taxa served as predatory "hosts" in a symbiotic relationship involving representatives of "A" taxa. b. currently living "B" taxa are typically much larger than representatives of "A" taxa Green sigse A Land plants c. the ancestors of "B" taxa experienced two, separate symbiotic incorporations of the original microbial ancestors of chloroplasts, whereas "A" taxa only experienced one such event. d. the ancestors of "B" taxa were able to incorporate the free-living chloroplasts from "A" taxa into their own cells. Oomyeetes 11. Transforming from heterokaryotic basidium to diploid zygote involves the process of and the combination of two haploid hyphae into one heterokaryotic hypha involve the process of a. plasmogamy; mitosis b. meiosis; fertilization c. karyogamy; meiosis d. karyogamy; plasmogamy e. plasmogamy; karyogamy

Explanation / Answer

Karyogamy, Plasmogamy

Karyogamy - within each basidium the two haploid nuclei fuse to form a diploid nucleus

Plasmogamy - two haploid hyphae undergo plasmogamy forming heterokaryotic cell that produces dikaryotic mycelium

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