Which of these originally tells where an amino acid is to be positioned in a protein?
A. DNA
B. nucleus
C. tRNA
D. ribose RNA
A. DNA
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Paleobiologists apply the ____ species concept to identify fossilized remains
a. phylogenetic b. paleontological c. genomic d. biological e. morphological
Blood returning to the heart enters:
a. a ventricle b. the aorta c. an atrium d. a capillary bed e. all of these
In microscopy, the term resolution
A) refers to the ability to distinguish fine structure and detail in a specimen. B) is the same as the total magnification of a specimen. C) is improved when longer wavelengths of light are employed. D) is only observed in stained specimens. E) refers to magnification when using the electron microscope.
The site of photosynthesis in a cell is the:
A) mitochondrion. B) central vacuole. C) chloroplast. D) stomata.