Symbiotic association in which one partner benefits and the other is unaffected is called:a
symbiosis.
b. mutualism.
c. commensalism.
d. parasitism.
e. colonialism.
C
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Which of the following environmental factors generally do(es) not have an impact on the efficiency of an antimicrobial agent?
A. Presence or absence of a biofilm B. Concentration of organic matter C. Refractive index D. pH
Which hormones are produced by the hypothalamus but secreted by the posterior pituitary gland?
A. oxytocin and antidiuretic hormone. B. thyrotropin-releasing hormone and corticotropin-releasing hormone. C. prolactin and growth hormone. D. prolactin and vasopressin. E. follicle-stimulating hormone and leutenizing hormone.
Which of the following morphological innovations is found in the ancestor that led to vertebrates?
a. the notochord b. vertebrae c. bone d. neural crest cells
Children and adults have which respective total numbers of teeth?
A. Children: 16; Adults: 32 B. Children: 18; Adults: 30 C. Children: 20; Adults: 30 D. Children: 20; Adults: 32 E. Children: 22; Adults: 34