Which of the following correctly lists the terms in hierarchical order from smallest to largest?
a. electron, atom, carbon element, water molecule, carbohydrate
b. atom, electron, carbohydrate, carbon element, water molecule
c. carbohydrate, carbon element, atom, water molecule, electron
d. water molecule, carbon element, electron, carbohydrate, atom
A
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What do the two daughter cells generated by the first asymmetric division of the plant zygote become?
A. the suspensor and the embryo B. the epicotyl and the hypocotyl C. the root and the shoot D. the egg and pollen E. the xylem and the phloem
Based on the fossil record, which of the following groups evolved about 1.8 million years ago and
made fairly sophisticated tools, including the hand axe?
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
Four of the five nitrogen-containing bases listed
below are bases used to construct DNA. Select the exception. a. cytosine b. adenine c. thymine d. guanine e. uracil
Fluid in the lymphatic system, as well as interstitial fluid, is
A) derived from blood plasma. B) pumped from the left ventricle into lymphatic vessels and then back into the right atrium. C) composed mostly of formed elements from blood. D) the liquid portion of fluid escaping from the digestive system. E) produced by the endothelium to lubricate the interior of vascular tissue.