Some organisms that are alive today do not look exactly like organisms that lived in the past. however, if a comparison of dna samples from two organisms that differ in appearance reveals that the organisms are nearly genetically identical, the samples may be used as evidence for : a. the big bang theory, or the theory that life began as a clump of matter that exploded outwards. b. atomic theory, or the theory that atoms are the most basic units of matter. c. the theory of evolution, or the theory that characteristics of populations can change over time. d. cell theory, or the theory that cells are the most basic units of life.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?