Which of these studies is a meta-analysis?
A) a study that examined a link between nitrogen in the soil and yellowing of leaves
B) a study that summarized research reports from many laboratories around the world indicating a relationship between a diet high in plants and colon cancer
C) a study that reported on seed germination rates at many different temperatures
D) a study that related transpiration rates in a number of different plants to weather conditions over many areas in North America
Answer: B
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Which of these junctions represents the connection between the tip of a neuron and a skeletal muscle cell from which acetylcholine diffuses?
A) neurotic B) tight C) neuromuscular D) desmosome
Which chemical process occurs in which a substance loses electrons?
a. entropy b. enthalpy c. oxidation d. reduction e. anabolism
The principle that energy cannot be created or destroyed is known as ________
A) cellular respiration B) conservation of energy C) conservation of heat D) entropy
In mitochondria, an electron transport chain pumps protons from the matrix into the intermembrane space, whereas in chloroplasts, an electron transport chain pumps protons from the ________.
a. the stroma into the cytosol. b. the stroma into the thylakoid space. c. the matrix into the stroma. d. the thylakoid space to into the stroma. e. the intermembrane space into the stroma.