_______ requires _____ to function
Fill in the blank(s) with the appropriate word(s).
Ans: ATP, muscle cells to have oxygen, glucose, & other materials circulated by the blood
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In vertebrates, most of the fluid that ultimately exits the body as urine first enters the nephron tubules by the process of ____________.
A. absorption B. excretion C. filtration D. reabsorption E. secretion
Lancelets are
a. fish shaped. b. filter feeders. c. three to seven centimeters long. d. burrowers in shallow sediments. e. all of these.
Two different species of pines release their pollen at different times. This is an example of:
A) geographic isolation. B) mechanical isolation. C) behavioral isolation. D) temporal isolation.
Which of the following statements about the structure or composition of DNA is FALSE?
A. Each nucleotide within a DNA strand is separated by about 0.34 nm B. Adenine pairs with thymine and guanine with cytosine C. DNA is a double helix D. The amount of thymine closely approximates that of guanine within a particular organism E. Complementary base-pairing occurs between pyrimidine and purine bases