The first successful land plants, even though they lacked vascular tissue, were the
A. mosses.
B. coniferous trees.
C. ferns.
D. liverworts and hornworts.
Answer: D
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A man is found dead with no marks on his body in a small enclosed furnace closet. The medical examiner rules death
by hypoxia. However, the criminal investigation finds that the room has adequate air flow. What is the most reasonable explanation for the cause of death that should be investigated further?
a. There was too little oxygen in the room. b. The furnace was faulty and burned up all the oxygen. c. The furnace was faulty and released carbon monoxide which accumulated in the closet. d. There was too much carbon dioxide in the room. e. The man strangled himself but the rope disappeared.
The ________ is a group of cells that will develop into the chorion
Fill in the blank(s) with correct word
Which of the following statements concerning bacterial growth at low temperatures is not true?
A) Low temperatures slow growth of cells B) Low temperatures reduce the rate of chemical reactions C) Low temperatures decrease the rate at which nutrients cross the cell membrane D) Low temperatures destroy lipids that make up the cell membrane E) Low temperatures reduce the fluidity of the cell membrane
In what ways are mitosis and meiosis similar?
A) each sorts duplicated chromosomes into daughter cells B) each forms a bipolar spindle C) enzymes that repair DNA damage are critical to both processes D) all of the choices