The fact that the two alleles of each gene are packaged into separate gametes because they move apart from each other during gamete formation is Mendel's law of
a. independent assortment.
b. crossing over.
c. segregation.
d. random fertilization.
e. population dynamics.
Ans: c. segregation.
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Which of the following factors may have favored the evolution of simple multicellularity?
A. All of these options are factors that may have influenced the evolution of simple multicellularity. B. increased ability to avoid predation C. increased ability to maintain a position in the water column D. increased ability to remain in a location that is favorable for growth E. increased ability to generate water currents for feeding
Diphtheria is considered to be an upper respiratory tract infection. However, it can have a very high mortality rate if not caught early and treated. Predict why this is so.
A. The patient cannot eat or drink and so basically starves to death. B. It makes a toxin that can be carried in blood and produce organ damage, particularly the heart. C. It successfully hides from the immune system of the patient. D. The bacterium moves from the throat to the brain, causing strokes to occur.
Describe the cortical reaction and explain its significance in the process of fertilization
What will be an ideal response?
Humans have a brain size that is:
A. Twice as large as would be expected for a mammal of our size B. Three times larger than would be expected for a mammal of our size C. Twice as large as would be expected for a primate of our size D. Three times larger than would be expected for a primate of our size E. Six times larger than would be expected for a mammal of our size