An acoelomate is an animal that:
A. has a coelom
B. has a pseudocoelom
C. has both a coelom and a pseudocoelom
D. has neither a coelom nor a pseudocoelom
E. has a coelom during early development but later loses it
D. has neither a coelom nor a pseudocoelom
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A green colony with a black center is isolated on HE agar from a stool specimen. It is most likely which organism?
a. E. coli b. Salmonella spp. c. Shigella spp. d. K. pneumoniae
Irregular dental hygiene and a high sugar diet may led to tooth decay. Why?
A. Bacteria consume calcium. B. Lactic acid fermentation is used to generate ATP under anaerobic conditions. C. Plaque degrades the tooth's protective mucosal layers. D. Glucose forms a weak acid when dissolved in saliva. E. High concentrations of sugar soften the tooth enamel. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about teeth? How does it relate to the question? · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Bacteria and yeast both replicate asexually and produce copies of themselves. What is this called in biotechnology?
a. molecular cloning b. meiosis c. cellular cloning d. reproductive cloning
Consider the aquatic insects pictured in the accompanying figure. Which characteristic of water molecules directly
contributes to their remarkable "water walking" success?
a. ionic bonds
b. capillary action
c. hydrogen bonds
d. adhesive forces
e. nonpolar covalent bonds