Which of the following events is not a characteristic of successful seed germination?
A. The seedling orients itself relative to gravity.
B. The embryo becomes desiccated.
C. New growth occurs at the meristems.
D. The shoot becomes photosynthetic.
E. The radicle breaks through the seed coat.
Answer: B
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High levels of carbon dioxide in the atmosphere are causing ____
a. the pH of the ocean to increase b. the pH of the ocean to decrease c. the natural buffers in the ocean to die d. increased calcification of the coral reefs e. increased biodiversity in coral reefs
Which of the following statements is
CORRECT about C4 plants?
a. In C4 plants, fixation of carbon dioxide and the light-independent reactions occur in two different types of cells. b. C4 plants are so called because a 4-carbon molecule is the first stable intermediate that forms in the light-independent reactions. c. In C4 plants, carbon dioxide is fixed by an enzyme that does not use oxygen even at high oxygen levels. d. C4 plants are adapted to produce glucose even when stomata are closed. e. C4 plants do not use rubisco or the Calvin- Benson cycle.
Peer review is essential to the scientific process because
A) several experts in the field are able to scrutinize a finding before it can be published. B) the process immediately validates any hypotheses tested in the experiments. C) the process can lead to improvements in articles prior to being published. D) it is the primary means for informing the general public about new information in the field. E) it tests hypotheses proposed by other investigators.
When two atoms share a pair of electrons, the bonding is referred to as
A. unstable. B. ionic. C. covalent. D. hydrogen.