Crossing over happens during which phase of meiosis?
What will be an ideal response?
prophase I
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Which of the following statements is TRUE of membrane phospholipids?
A. The hydrophilic head groups face the interior portion of the membrane. B. The hydrophobic tail groups face the exterior portion of the membrane. C. They spontaneously flip-flop from one side of the membrane to the other. D. They freely move laterally within the membrane. E. They rarely flip-flop across or move laterally within the membrane.
All veins carry deoxygenated blood
Indicate whether the statement is true or false
Glycolysis breaks down glucose into two pyruvates.
a. true b. false
Microevolution represents:
A. changes that occur within a biological population that are easily observed B. large-scale evolutionary changes that result in the origin of new species C. changes that occur slowly over long periods of time D. the processes that cannot be easily observed