A hormone that prevents release of a different hormone by its target endocrine cells is called a(n) _____ hormone
a. releasing
b. inhibiting
c. amino acid-derived
d. steroid
e. peptide
ANSWER: b
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Which of the examples below provides evidence of plant trade-offs?
A. Plants from nutrient-rich habitats grow large and have few defensive compounds. B. Plants growing in nutrient-poor soils do not invest heavily in defense because they do not have the resources. C. Plants grown in a rocky habitat are smaller. D. Plants growing in a nutrient-rich habitat do not produce many defensive compounds in their leaves.
The obvious advantage of the lactose operon is
that a. it allows bacteria to survive in the presence of lactose. b. lactose-metabolizing enzymes need not be made when lactose is not present. c. it enables bacteria to make lactose only in the presence of the proper enzymes. d. it negates the need for milk in the diet of adult humans. e. it enables glucose to substitute for lactose in the diet of lactose intolerant persons
Which of the following bacterial species is classified as high G+C gram positive?
A. Corynebacterium diphtheriae B. Staphylococcus aureus C. Bacillus anthracis D. Streptococcus pneumonia
All of the following are true of Adipose except ___?
a. Serves as insulation b. Energy storage c. Connective tissue d. no nucleus e. nucleus pushed off to side of cell