Most animals on land have __________ fertilization; gametes meet in a female's body. Fill in the blank(s) with the appropriate word(s)
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The mode of infection for which of the following organisms is the ingestion of cysticercoid in an infected arthropod or by the direct ingestion of the egg? Autoinfection may also occur
a. D. latum b. Hymenolepis nana c. Taenia saginata d. Taenia solium
On the accompanying illustration, "A" and "B" should be labeled, respectively, ____ and _____
a. consumers; producers b. decomposers; producers c. producers; redistributors d. producers; consumers e. consumers; decomposers
Which of the following is only true of RNA, but not DNA?
A. Guanine pairs with cytosine. B. Adenine pairs with uracil. C. The backbone is made up of alternating 5-carbon sugars and phosphate groups. D. It is comprised of nucleotides.
Which of the following exert bottom-up control?
A. a disease-carrying protist B. a parasite that resides in a mammal's gut C. levels of calcium and nitrogen in the soil D. a tertiary predator with fluctuating population size