Transfer RNAs have an amino acid attached to them when they bind to ribosome.
have a codon site.
bind to the mRNA during translation by forming covalent bonds.

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Which type of scientific statement is defined as a hypothesis or group of hypotheses that can be accepted as true based on the repeated experimentation with similar results

What was the land like over 500 million years ago? what was under the sea?