Which phylum includes members that have, at some point during their development, a hollow dorsal nerve cord?
a. Hemichordata
b. Arthropoda
c. Cnidaria
d. Chordata
Answer: d. Chordata
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Which of the following are incorrectly matched for a single-factor cross?
A. P generation / true breeding B. F1 generation / monohybrid C. F2 generation / result of F1 cross D. F1 generation / result of P cross E. F2 generation / result of P cross
Which of the following characteristics apply to fungi?
a. heterotroph only b. heterotroph, producer c. heterotroph, multicellular, cell wall d. heterotroph, producer, multicellular, cell wall
A core sample is taken 100 km west of and parallel to a ridge system. Magnetic readings of the rock show a reversal of the Earth's magnetic field. How many km east of the ridge system must scientists travel to collect a core sample with the same magnetic properties?
a. 50 b. 100 c. 200 d. 0 km; collect the sample directly at the ridge
Water is important to the interactions of biological
molecules because it a. promotes hydrophobic and hydrophilic interactions. b. stabilizes temperature. c. is an excellent solvent for polar and ionic substances. d. has strong cohesive properties. e. is all of the above.