Reproduction in the earthworm involves
a. Asexual budding
b. Self-fertilization
c. Cross-fertilization between two dioecious organisms
d. Cross-fertilization between two hermaphroditic organisms
e. Reproduction by "stem mothers."
Answer: d. Cross-fertilization between two hermaphroditic organisms
You might also like to view...
Clostridium perfringens food poisoning leads to diarrhea, because the
A) toxin causes the shedding of the intestinal lining. B) permeability of the intestinal epithelium is altered by the toxin it produces. C) disease causes such extreme thirst that the patient drinks more water than can be absorbed. D) organism multiplies more rapidly than the immune system can handle.
Phenotypic testing is often beneficial in identifying infectious agents from patient samples; however, some disadvantages include
A. non-specificity of some biochemical tests since all pathogens utilize the same substrate as a fuel source. B. organisms must be grown on the same culture media so it is difficult to distinguish them from each other. C. lengthy culturing times and the inability to grow some bacteria in vitro. D. difficulty in identifying motile organisms.
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?
As elevation increases
a. O2 availability increases. b. O2 availability decreases. c. O2 availability remains constant. d. O2 levels increase, but there is none present above 20,000 feet. e. O2 levels decrease, but there is none present above 20,000 feet.