Chemoreception is critical to most insects. Where do insects detect smells/tastes>
a. Mouthparts
b. Legs
c. Antennae
d. All of the above
Ans: d. All of the above
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Refer to the table above. Because the shark rectal gland functions only when ATP molecules are present, what can you infer about the movement of Na+, K+, and Cl-?
A) Movement of these ions from circulation into the rectal gland is an active process. B) Movement of these ions takes place from a region of higher concentration to a region of lower concentration. C) These ions move into the rectal gland down their concentration gradient. D) The rectal gland is unable to concentrate these ions.
Which part of a bird's digestive system contains sand and rocks to aid in mechanical digestion?
a. crop b. esophagus c. gizzard d. pharynx e. proventriculus
Why is one side of a single water molecule partially negative while the other side is partially positive?
A) Electron pairs are unevenly shared between the oxygen atom and the two hydrogen atoms. B) Electron pairs are unevenly shared between the two hydrogen atoms. C) Oxygen donates its electrons to hydrogen. D) Hydrogen donates its electrons to oxygen.
Specialized cells that work together to perform a common function are called
A. organisms. B. organs. C. tissues. D. glands. E. membranes.