The above figure is a photomicrograph of what
kind of tissue?
a. cardiac muscle
b. skeletal muscle
c. smooth muscle
d. cartilage
e. dense connective
B
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Which one of the following gases was not a component of the simulated atmosphere in the Miller-Urey experiment?
A. hydrogen B. water vapor C. oxygen D. methane E. ammonia
When does translation begin?
a. when a tRNA anticodon recognizes an mRNA codon b. when a polypeptide chain is formed c. when a ribosome accepts charged tRNAs d. when an uncharged tRNA departs the complex
How is the use of the word theory in science different than how the word is used in everyday language?
1.There is no difference. The word is used the same way in both contexts. 2.Scientific theories are supported by years of scientific testing. 3.Scientific theories are general ideas believed by scientists. 4.Scientific theories are disproven by experiments.
Humans are _______.
a. Australopithecus b. Homo erectus c. Ardipithecus d. Homo sapiens e. Homo habilis