The vertebral column develops from
a. the notochord.
b. the hollow, dorsal nerve cord.
c. the gill slits.
d. the tail.
e. more than one of these
A
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Is photosynthetic O2 production light-dependent?
a. Yes b. No
Force
What will be an ideal response?
A population of grasshoppers in the Kansas prairie has two color types: green and brown. Typically, the prairie receives enough rainfall to maintain healthy, green grass. Assume a bird species that eats grasshoppers moves into the prairie
How will this affect the natural selection of the grasshoppers? How might this change in a drought year, when the grass turns brown?
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.