11. For a cedar tree that only grows in the upper life zones of the Sky islands
ID: 302119 • Letter: 1
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11. For a cedar tree that only grows in the upper life zones of the Sky islands of the southwest US, gene flow from one mountaintop to another is most likely to occur by: A. Mobile diploid individuals (adults) B. Diploid propagules (seeds, spores, vegetative propagules) C. Mobile gametes or gametophytes (sperm or pollen) D. All of the above E. None of the above Explain the reasoning for your answer: For a coyote that preys upon the birds, rode mammals and reptiles, gene flow from one mountaintop to another is most likely to occur 12. nt species, and many other small A. Mobile diploid individuals (adults) B. Diploid propagules (seeds, spores, vegetative propagules) C. Mobile gametes or gametophytes (sperm or pollen) D. All of the above E. None of the above Explain the reasoning for your answer: 13. For a newt (an amphibian) that only grows in the ponds and springs near the tops of sky islands, gene flow from one mountain to another is most likely to occur by: A. Mobile diploid individuals (adults) B. Diploid propagules (seeds, spores, vegetative propagules) C. Mobile gametes or gametophytes (sperm or pollen) D. All of the above E. None of the aboveExplanation / Answer
Gene flow is the transfer of genetic material between separate populations. Many organisms are divided into separate populations that have restricted contact with each other, possibly leading to reproductive isolation.
The essential mechanism of gene flow is movement of individuals (or their gametes) between populations. For example, gene flow can occur in plant species when pollen is carried by bees or blown by the wind from one population of flowering plants to another.
11. B. Diploid propagules (seeds, spores, vegetative propagules)
Its a plant, so gene gene flow occur in plant species when pollen, seeds, spores, vegetative propagules are carried by bees or blown by the wind from one population of flowering plants to another.
12. A. Mobile diploid individuals (adults).
The coyote (Canis latrans) is a canine native to North America. It is smaller than its close relative, the gray wolf, eastern wolf and red wolf. As its a mammal, so breeding and reproduction is only possible if migration occurs and the adult moov from one place to another.
13. C. Mobile gametes or gametophytes (sperm or pollen).
Newts breed in water and males don't have penises to impregnate females internally. For insemination, males will deposit a sperm packet (called a spermatophore) onto a substrate in the water, such as a leaf, and then lead the female over it so she can pick it up with her cloaca. The female will then walk over the spermatophore and move her body against it to collect the sperm. Female newts lay eggs, and the young are hatched after an incubation period. Females can lay hundreds of eggs in one breeding season. So this entire process is possible only in case of mobile gametes or gametophytes (sperm or pollen) for the occurance of gene flow.
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