The ________ on the axis (C2) forms a pivot point with the atlas (C1) that allows you to nod a "no."
Fill in the blank(s) with the appropriate word(s).
dens
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Unsaturated fats ____
a. are solid at room temperature b. have at least one double bond in their fatty acid tail c. are saturated with hydrogen atoms d. mainly come from animals e. consist of straight chain fatty acids
Eyes are
a. chemoreceptors. b. mechanoreceptors. c. photoreceptors. d. nociceptors. e. baroreceptors
Dolphins (which are mammals) and sharks (which are fish) have stiff dorsal fins projecting from their backs that help them maneuver through water. What are these structures BEST described as?
A) analogous structures. (B) homologous structures. (C) vestigial structures. (D) mutations.
Suppose you saw the seedling pictured at the right while walking in the woods.
a. To which gymnosperm phylum does the plant belong? b. Identify structures a) seed coat and b) cotyledon.