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28 Jan 2019

Which of the following is an example of sympatric speciation? 1. Two populations of salamanders that live on isolated islands and eventually become separate species, unable to interbreed. 2. Different breeds of dog, which live in different areas of the world, but are able to produce fertile offspring. 3. A horse and a donkey, which may interbreed to produce a mule, which is sterile and unable to reproduce. 4. Tow related plant species living in the same area that hybridize, then undergo chromosome doubling, which results in the creation of a third specie of plant that is unable to reproduce with either of the two original species. 5. Three species that evolve from a common ancestral species due to reproductive iisolation, and adaption to different habits.

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29 Jan 2019

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photosynthesis; respiration; mitosis; meiosis; fertilization

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Microevolution is

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minor extinction of species

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Which of the following is does not help defend against predators?

Toxins made by plants that injure caterpillars feeding on the plant

The large eyespots on a moth's wing that can startle a hungry bird

Thorns on a plant

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the first fossils found in the earliest rock strata

As temperatures in the Arctic warm, which of the following changes may occur?

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environmental influences that promote one phenotype versus all others

environmental influences that promote two or more phenotypes versus all others

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populations

communities

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mimicry

chemical defense

mutualism

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