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Viruses Quiz

Biology P A (Fall) #2251 / Classification

Target due: Tomorrow

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4.

Which of the following statements is true about viruses?

Viruses are living organisms.

Viruses that cause disease in plants can also make humans sick.

Viruses are very small and can only be seen through electron microscopes.

VIruses are about the same size as bacteria.

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16 select the correct answer from each drop-down menu. sharks, whales, and dolphins share similar features such as body shape and the position of fins. hoy while whales and dolphins have lungs. these differences indicate that the organisms share a comme whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales reset next

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Apopulation of bears has genetic diversity. some of the bears have an allele that gives them thicker fur. due to climate change, the winters have gotten colder in their habitat. now the bears with thicker fur are becoming more common in the population. a.) which type of bear is selected for in the coldest ecosystem? b.) what must be the other allele for the type of fur, and what term would you use to describe the fact that the allele is becoming less common in the colder climate? c.) describe the change in the bear population in terms of changing allele frequencies and phenotypes d.) is this an example of natural selection