The __________ vertebrae articulate with the corresponding ribs.
Fill in the blank(s) with the appropriate word(s).
thoracic
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Substance A is synthesized in the liver, travels through the circulatory system bound to a carrier protein, and causes a
change in gene expression in a target cell. This is an example of ____.
a. autocrine signaling b. paracrine signaling c. long-distance signaling d. local signaling e. communication by direct contact
According to the Endangered Species Act, what is required when a species is identified as at- risk?
a. Land must be purchased by the government to protect the species. b. A biodiversity hotspot must be designated to protect the species. c. The designated habitat must be removed from the private sector. d. A management plan to protect the species must be created.
Answer the following statements true (T) or false (F)
1. The root hairs develop in the zone of elongation. 2. The direction in which a plant cell expands depends on the arrangement of cellulose microfibrils in its cell wall. 3. Flowers develop as a result of determinate shoot growth. 4. The expression "one bad apple spoils the whole bunch" probably has to do with the action of ethylene on fruit ripening.
Having a concentration of nerve and sensory cells at the head end is referred to as:
1.bilateral symmetry 2.cephalization 3.coelomate 4.deuterostomate