The pancreas, liver, and gallbladder connect to the digestive system at the:
A) ilium.
B) secum.
C) jejunum.
D) duodenum.
Ans: D) duodenum.
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When all continents were fused into one during the Permian Period, they were called
a. Laurasia. b. Pangaea. c. Gondwanaland. d. Eurasia. e. Amerasia.
The cell that participates in both the innate and adaptive defense by presenting antigens to activate helper T cells is the
A. B cell. B. T cell. C. macrophage. D. plasma cell. E. chondrocyte.
Which of the following changes take place as the muscle contracts?
A) The Z lines get closer together. B) The H zones get smaller. C) The I band gets smaller. D) The A band gets smaller. E) A, B, and C are correct.
Maternal effect genes of Drosophila are genes active in ____ cells, whose products establish ____ in developing
embryos. a. maternal; gender b. maternal; polarity c. embryonic; polarity d. embryonic; gender e. egg; gender