Stomatal guard cells swell to create a stomata in response to ________.
A. The loss of Na+ and Cl- ions, allowing water to flow into the cells by osmosis
B. The active transport of water into stomatal guard cells
C. The outward flow of K+ ions, causing water to flow out of the cells by osmosis
D. The inward flow of K+ ions, causing water to flow into the cells by osmosis
E. Wilting in the leaf, which stimulates the uptake of water by stomatal guard cells
Answer: D. The inward flow of K+ ions, causing water to flow into the cells by osmosis
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A cross is performed between parents with genotypes aaBbCc and aaBbcc. What is the probability that the offspring
will have the same genotype as the first parent? Assume that capital letters indicate dominant alleles and lower case letters indicate recessive alleles.
a. 1/8 b. 1/4 c. 3/8 d. 3/16 e. 9/16
The nitrogen cycle is a series of chemical transformations, which makes it relatively insensitive to environmental conditions such as temperature and moisture
Indicate whether the statement is true or false
Nonscientists often use the words "name," "identify," and "classify" interchangeably. When they want to know what an organism is, they may ask "Can you name this?" or "Can you identify this?" or "Can you classify this?" Which of the following is/are correct usage(s) of the term(s)?
A. A farmer using a key to detect pest insect species in his fields is identifying insects but not naming or necessarily classifying them. B. Classifying is grouping, and to classify something requires several organisms so you can group one as closer to a second and distant from a third. C. A scientist who publishes the name and description of a new species must necessarily also know both how to identify and classify the species. D. Only the scientist who first describes a new species actually names it. E. All of the choices are correct.
What part of a neuron carries signals toward the part of the cell that houses the nucleus?
A) node of Ranvier B) axon C) cell body D) dendrite