In Figure 16.1, how many mL is the vital capacity?
A) 1700
B) 2200
C) 4100
D) 2800
E) 1300
Answer: C) 4100
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An __________ is an enclosed coastal region where
seawater mixes with nutrient-rich fresh water from rivers and streams. Fill in the blank(s) with the appropriate word(s).
Which piece of evidence would strongly support the RNA-first hypothesis?
A. discovering a way to make RNA more stable than DNA B. being able to build microspheres that contain only protein and RNA C. finding a mechanism whereby proteins could assemble DNA out of free nucleotides D. finding a protocell that could carry on metabolism as well as reproduce E. finding a living organism that uses RNA as its genetic material
Analysis of DNA sequences from two individuals of the same species results in a greater estimate of genetic variability than does analysis of amino acid sequences from the same individuals because...
A. different DNA sequences can code for the same amino acid B. Some amino acid variations cannot be detected b protein electrophoresis C. DNA sequencing is more reliable technique than protein electrophoresis D. proteins are more easily damaged than is DNA E. DNA is more heat-sensitive and therefore varies more
Which of the following enabled Homo sapiens to develop complex cultures unlike other members of the Homo genus?
A. the ability to walk upright B. the development of agriculture C. the ability to migrate out of Africa D. changes in skin color E. the ability to use stone tools