Choose the letter of the best match from the following:A. hypocotylB. endospermC. scutellumD. radicleE. epicotylNutritive tissue within angiosperm seeds.
Fill in the blank(s) with the appropriate word(s).
B
endosperm
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Which of the following is a hormone produced in the posterior pituitary that increases water absorption
in the kidneys?
a. atrial natriuretic factor b. renin c. aldosterone d. antidiuretic hormone e. angiotensin
Diseases can re-emerge for a variety of reasons. Evaluate the following statements and choose the one that does not provide evidence for a re-emergence.
A. Humans have avoided animal habitats. B. Pathogens evolve over time. C. Agents of bioterrorism have been introduced into a population. D. Climate change influences arthropods to expand their geographical areas.
Which of these characteristics would most likely discourage self-pollination in a flower with both stamens and pistils?
A. Long pistils and short stamens B. Determinant plants C. Wind pollination D. Long stamens and short pistils E. Many more stamens than pistils
The function of the torus in the walls of tracheids is
A. allowing the passage of water. B. stopping backflow of water. C. sealing off air bubbles. D. secretion of resin. E. allowing the escape of air.