A water strider walks across a pond on________
Fill in the blank(s) with the appropriate word(s).
Answer: Hydrogen bonds
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Accumulations of cells that divide uncontrollably are called ______
a. oncogenes b. proto-oncogenes c. neoplasms d. checkpoints e. descendant tumors
How does scientific information in peer-reviewed journals differ from that in newspapers?
A) Information is more technical; readers usually require a background in the field in order to understand the article. B) The article is written by a reporter, not a researcher. C) Articles often include political, ethical, and economic ramifications of the scientific findings. D) Information is less in-depth and easily understood by the average reader. E) Information is not approved by other scientists before its publication.
The correct order of the layers of tissue from the outside of the digestive system toward the lumen is:
a. mucosa, submucosa, muscle layer, and visceral peritoneum. b. mucosa, visceral peritoneum, muscle layer, and submucosa. c. visceral peritoneum, muscle layer, submucosa, and mucosa. d. muscle layer, visceral peritoneum, mucosa, and submucosa. e. visceral peritoneum, mucosa, muscle layer, and submucosa.
Why are lampreys classified as vertebrates?
A) They lack gills. B) They are ectothermic. C) They lack jaws. D) They have an exoskeleton. E) Their nerve cord is surrounded by cartilage.