The choanocytes have a flagellum that moves water through the sponge and a collar that extracts food particles from the water. In what group have you encountered very similar cells before?
A. the choanoflagellates.
B. the chytrids.
C. the Euglenozoa.
D. the Foraminifera.
E. the charophytes.
Answer: A
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Jane and Tom are worried about their newborn baby who has just begun to nurse, but chokes and turns blue whenever she is fed. Their baby most likely has a defect in her _____.
A. muscle in the lower two-thirds of her esophagus B. tongue muscles C. muscle in the upper-third of her esophagus D. epiglottis E. soft palate Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the anatomical structure that malfunctions in choking? 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?
Which of the following serves to end the menstrual
cycle? a. a surge in luteinizing hormone b. the secretion of human chorionic gonadotropin c. the breakdown of the corpus luteum d. a rise in the level of progesterone e. a drop in the level of gonadotropic hormones in the blood
Nucleotides contain all of the following except
A. a 5-carbon sugar. B. a phosphate group. C. a nitrogen base. D. histones.
What is the key to the recognition of codominance?
A) The phenotype of the heterozygote is intermediate between the phenotypes of the homozygotes. B) The trait exhibits a continuous distribution. C) The alleles affect more than one trait. D) The heterozygote expresses the phenotype of both homozygotes.