Which of the following products contain materials
obtained from tropical rain forests?
a. tires
b. ice cream
c. shoes
d. toothpaste
e. all of these
Answer: e
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Place the five steps of digestion in most animals with a digestive tube in the proper order
a. absorption ? enzymatic hydrolysis ? mechanical processing ? secretion of enzymes ? elimination b. absorption ? mechanical processing ? enzymatic hydrolysis ? secretion of enzymes ? elimination c. mechanical processing ? absorption ? secretion of enzymes ? enzymatic hydrolysis ? elimination d. mechanical processing ? secretion of enzymes ? enzymatic hydrolysis ? absorption ? elimination e. mechanical processing ? secretion of enzymes ? absorption ? enzymatic hydrolysis ? elimination
In an antibody-mediated immune response, with which cells do naïve helper T cells interact?
a. antigen presenting B cells b. effector helper T cells c. memory B cells d. antigen presenting dendritic cells e. effector B cells
The teeth designated by the letter “D” in the above
figure are called a. canines. b. premolars. c. incisors. d. molars. e. none of these.
Creutzfeld-Jacob disease is
A. caused by a chronic latent virus. B. initiated by an oncogenic virus. C. caused by a viroid. D. a spongiform encephalopathy of humans. E. also called "mad cow disease"