Nitogen Fixing Bacteria
What will be an ideal response?
Soil microogranisms that are often found in root nodules that help make nitrogen available to plants.
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Blue light has ___ energy than red light and is ____ by a green leaf.
A. more, reflected B. less, reflected C. more, absorbed D. less, absorbed
Which of the following is responsible for changes in airway resistance that occur in a single breath?
A) passive forces exerted on the airways B) contractility of smooth muscle cells C) sensitivity of smooth muscle cells to allergens D) autonomic nervous system E) surrounding atmospheric pressure
This hormone causes the uterus to contract and the breasts to release milk.
A. androgens B. oxytocin C. estrogen D. follicle-stimulating hormone
Cotyledons and endosperm both provide nutrition. What is the difference between them?
A) Cotyledons provide nutrition for the developing embryo; endosperm provides nutrition for the young seedling. B) Endosperm provides nutrition for the developing embryo; cotyledons provide nutrition for the young seedling. C) Cotyledons are found only in flowering plants; endosperm is found only in young ferns. D) Endosperm is found only in monocots; cotyledons are found only in dicots. E) Endosperm is always photosynthetic; cotyledons are usually not.