A seed is often described as "a baby plant in a box with its lunch." Explain this statement using more
proper terms for baby plant, box, and lunch.
What will be an ideal response?
A seed has a "baby plant" called an embryo, which is the developing sporophyte. It is surrounded by
its "lunch," food supplies in the form of nutritive tissue such as endosperm. The embryo and the
nutritive tissue are in a "box," hardened tissue called a seed coat that protects the embryo from drying
out.
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Which of the following statements about the sodium-potassium pump is false?
a. Most cells of the body have sodium-potassium pumps b. The sodium-potassium pump moves sodium ions from inside the cell to outside, while importing potassium ions from the extracellular fluid. c. The sodium-potassium pump is a form of gated passive transporter. d. The transporter changes shape in response to binding of its target molecules.
Secondary succession is likely to occur in
a. a burned forest. b. a shallow lake. c. an abandoned field. d. a burned forest and a shallow lake. e. a burned forest, a shallow lake, and an abandoned field.
The primary function of the large intestine is to
A. emulsify fats. B. reabsorb water and other secretions. C. absorb food molecules. D. produce digestive juices.
Why is photosynthesis a coupled reaction?
A) Photosynthesis requires two reactants: carbon dioxide and water. B) Sunlight energy enters a plant and is ultimately lost as heat. C) The exergonic reaction occurs in the plant, and the endergonic reaction occurs in the sunlight. D) The exergonic reaction occurs in the plant, and the endergonic reaction occurs in the soil. E) An exergonic reaction occurs in the sunlight, and an endergonic reaction occurs in the plant.