Since energy cannot be created, which arrow represents the energy that will be converted to chemical energy the chameleon can later use?
A. Arrow A, the tongue extending
B. Arrow B, the insect being eaten
C. Arrow C, sunlight striking the chameleon
D. Arrow D, heat radiating from the chameleon
Answer: B
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What do you expect to be the relationship between population size and number of cultural traits?
A. The larger the population, the larger the number of cultural traits. B. The smaller the population, the larger the number of cultural traits. C. There is no relationship between population size and the number of cultural traits.
Which of the following statements about paracrine regulation is TRUE?
a. The hormones released only stimulate the cells that secreted them. b. The hormones released only inhibit the cells that secreted them. c. The hormones released act on nearby target cells. d. The hormones released are transported down axons. e. The hormones released link the endocrine and nervous systems.
Triplo-X syndrome is when a woman has an extra X chromosome. Using your knowledge of chromosomal inheritance, which of the following statements is most likely to be correct?
a) A woman with three X chromosomes produces oocytes with two X chromosomes, which could result in her giving birth to a XXY son. b) Women with this condition are usually marked by profound mental impairment. c) This condition does not exist because a fetus with three X chromosomes cannot survive birth. d) Women with this disease are able to give birth to normal children with the normal number of sex chromosomes. e) Both a) and d) are likely to be correct.
What part of the bacterial ribosome has peptidyl transferase activity?
a. a protein in the 30S ribosomal subunit b. 23S rRNA c. a protein in the 50S ribosomal subunit d. 16S rRNA e. 5S rRNA