Rocky Mountain juniper (J. Scopulorum) and one-seeded juniper (J. monosperma) are closely related coniferous trees, ofte

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Rocky Mountain Juniper J Scopulorum And One Seeded Juniper J Monosperma Are Closely Related Coniferous Trees Ofte 1 (56.51 KiB) Viewed 10 times

Rocky Mountain juniper (J. Scopulorum) and one-seeded juniper (J. monosperma) are closely related coniferous trees, often found growing in overlapping woodland areas. Careful observations have led to the conclusion that these two species cannot interbreed, they have undergone prezygotic isolation. Which of the following observations about their reproduction is most likely TRUE? O a Seeds formed from the occasional mating are generally desiccated and germinate into weak and short seedlings. Ob. Pollen grains from one species are unable to germinate on the other species. O c. Each species grows in different habitats, they have a very different set of abiotic and blotic pollinators Od. The unicellular female gametes produced by one species are unable to fuse with the multicellular male gametes produced by the other species Sea lampreys (Petromyzon marinus) have remained largely unchanged for over 300 million years and have survived through at least four major extinction events. Lampreys parasitize fish by sucking their blood and other body fluids. These parasites are native to the Atlantic Ocean, but over the last century, with increased shipping traffic, have invaded the Great Lakes. Unlike host fish in the Atlantic Ocean, host fish in the Great Lakes are often unable to survive sea lamprey parasitism, either dying directly from an attack or from infections in the wound after an attack Based on this paragraph and your understanding of animal phylogeny, you O a can inter that host fish in the Atlantic Ocean are relatively immune to lamprey parasitism likely due to the impacts of co-evolution. Ob know that tampreys are gnathostomal vertebrate chordates. Oc know that lampreys are more closely related to tunicates than to sharks Od can inter that the lamprey populations have remained steady and that their evolutionary fitness is a consequence of their invasive ability