What is the relationship between the degree of crossing over and the distance between two genes?
A) It is direct: as the distance decreases, the frequency of recombination increases.
B) It is direct: as the distance increases, the frequency of recombination increases.
C) It is indirect: as the distance increases, the frequency of recombination doubles.
D) There is no correlation.
E) It is indirect: as the distance decreases, the frequency of recombination doubles.
Answer: B
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The real goal of hypothesis testing is to
A) eliminate incorrect ideas. B) form a theory. C) fully explain observations. D) understand why science never changes.
Molecular data suggest that mosses, hornworts, and liverworts have individual lines of descent, but that they form a monophyletic group.
Answer the following statement true (T) or false (F)
The approach to estimating phylogenetic trees is most like the approach of which species concept?
A) morphological species concept B) biological species concept C) phylogenetic species concept
Which best describes the protective action of blinking?
A) An interneuron detects motion and sends this message to the peripheral nervous system (PNS), and the PNS sends a message back to blink. B) A sensory receptor detects motion, a sensory neuron sends this information to the spinal cord, and the information in the central nervous system (CNS) sends a message back to blink. C) A cell body detects motion, a sensory neuron sends this message to the peripheral nervous system (PNS), and the PNS sends a message back to blink. D) A cell body detects motion, a sensory neuron sends this message to the spinal cord, and the information in the central nervous system (CNS) sends a message back to blink.