Most members of the ____ Cnidarian lineage, including Obelia species, have both polyp and medusa stages in their
life cycles, with the polyp stage typically forming a colony.
a. Hydrozoa
b. Scyphozoa
c. Trematoda
d. Cubozoa
e. Anthozoa
ANSWER: a
You might also like to view...
Calvin Bridges, an associate of Thomas Hunt Morgan's, found further evidence that genes were located on chromosomes. Which of the following is not a component of his study?
A. He crossed white-eyed females (XwXw) with red-eyed males (XWY). B. The F1 progeny were mostly the red-eyed males and white-eyed females expected. C. A few rare white-eyed females and red-eyed males were observed, which he called primary exceptionals. D. He proposed that the rare white-eyed females were the result of abnormal chromosome number. E. Abnormal chromosome number was a result of nondisjunction in the female fly.
The pathway of metabolism that involves a series of electron transfers from reduced carrier molecules such as NADH2 and NADPH2 to a terminal electron acceptor is:
a. substrate-level phosphorylation. b. fermentative metabolism. c. oxidative phosphorylation. d. aerobic respiration.
Which part of the Earth is warming the most quickly?
A) the Arctic B) the tropics C) the Northern Hemisphere D) All parts of the Earth are warming equally.
The area where the fresh water of a river meets the salt water of the ocean is a (n)
A. intertidal zone. B. continental shelf. C. hydrothermal vent. D. open ocean. E. estuary.