What are two important factors that determine whether or not molecules pass through?

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird

What occurs during translation? a. mrna is created by using a dna template b. mrna codons are joined by trna anticodon to assemble amino acids to form a protein c. protein is formed when a polypeptide chain is broken apart and released from ribosome d. one strand of dna is copied into a strand of rrna

Abotanist scrapes pollen off a flower