The FOXP2 gene encodes a protein involved in aggressive behavior. Indicate whether the statement is true or false
F
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Bryophytes, like ferns and certain other tracheophyte plants, require
A. air to reproduce sexually. B. water to reproduce sexually. C. soil to reproduce sexually. D. shade to reproduce sexually. E. sunlight to reproduce sexually.
Which of the following statements regarding the structure of blood vessels is incorrect?
A. In contrast to veins, arteries have higher blood pressure, more tissue layers, and are thinner vessels. B. Blood vessels are often found in parallel with lymphatic vessels. C. Capillaries have only a single layer of endothelium, rendering them fragile and leaky during an infection with a hemorrhagic fever virus. D. Connective tissue and muscle fibers are found in the layers of tissue surrounding both arteries and veins.
Which of these human sex chromosome genotypes is not possible?
A. XXY B. XXXY C. XXX D. YYYY
How does an enzyme work to catalyze a reaction?
A. It lowers the activation energy of a reaction. B. It supplies the energy to speed up a reaction. C. It increases the concentration of the reactants in a reaction. D. It allows the reaction to proceed through different intermediates. E. It raises the temperature of a reaction.