A a plant to invest energy in developing multiple cell layers, they are shaped like pillars that stand in parallel columns one to three layers deep. Below the epidermis, the top layers of photosynthetic cells are called

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#Question id: 4723

#Unit 8. Inheritance Biology

The most common cause of the pleiotropic effect of gene is due to

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#Question id: 5783

#Unit 8. Inheritance Biology

Which of the following genetic diseases results from a mutation that prevents a protein from forming?

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#Question id: 19107

#Unit 8. Inheritance Biology

Assume that mating is random. First, consider an autosomal recessive disease that is usually lethal in childhood, and that has an incidence among newborns of 1/3000.  Perhaps the explanation for the incidence of the disease is heterozygote advantage. How large would this heterozygote advantage have to be (assuming the mutation rate is negligible)? 

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#Question id: 24651

#Unit 2. Cellular Organization

For the SERCA pump, how many Ca2+ ions moves across the membrane during each catalytic cycle ?

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#Question id: 9264

#Unit 9. Diversity of Life Forms

In a comparison of birds and mammals, the condition of having four limbs is