Which of the following antibodies is a dimer?
A. IgA
B. IgD
C. IgM
D. IgE
A
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Effector
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?
The charge of a water molecule is considered:
a. polar. b. positive. c. negative. d. neutral. e. nonpolar.
The yeast in the image below are budding into haploid cells. What molecule have they most likely begun to secrete?
a. luciferase
b. autoinducer
c. mating factor
d. tyrosine kinase
The human placenta is formed by the interaction of uterine tissue and what extraembryonic tissue?
A. amnion B. embrion C. chorion D. yolk sac E. allantois