Which of the following is a true statement about codons?

A.

A codon is a sequence of four nitrogenous bases.

B.

A codon is a sequence of three amino acids.

C.

In translation, an mRNA codon is recognized by its complementary amino acid.

D.

In translation, an mRNA codon is recognized by its complementary tRNA.

Which cell organelle is the site for photosynthesis? a. chloroplast b. endoplasmic reticulum c. golgi apparatus d. lysosome

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales

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