Which structures make up the male reproductive whorl of a flower?
a. the sepals
b. the carpels
c. the stamens
d. the receptacles
Ans: c. the stamens
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Integrating Center
Match the letter of each example from childbirth to the appropriate component of a positive feedback loop. A. pituitary gland secretes oxytocin, which acts on the uterus B. uterine contractions increase C. fetus is pushed against uterine opening D. receptors detect stretch E. brain receives and compares stretch information Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about positive feedback? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Ribosomes begin translation of an mRNA transcript at the first
A) anticodon. B) AUG. C) promoter. D) tRNA.
What causes a nerve impulse to travel along the membrane?
What will be an ideal response?
What would your predict about the following reaction?Pi + ADP ? ATP
A. It has a change in free energy that is greater than 0, and hence can be used to drive endergonic reactions. B. It can be used to drive endergonic reactions. C. It has a change in free energy that is less than 0. D. It yields energy. E. It has a change in free energy that is greater than 0.