Muscles in animals are often found in pairs, because
a. muscles need to be able to both push and pull.
b. muscles can only push.
c. muscles can only produce a force as they relax.
d. muscles can only pull.

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

Label the steps for protein synthesis in order, beginning with the first steponce the protein is made, the gene for a particular trait is expressedmrna joins the ribosome, and the anticodons from trna join mrna to form a chain ofamino acidsrna polymerase unzips dna and free rna nucleotides join dna to form mrnav a chain of amino acids is formed from peptide bonds, creating a proteinmrna is transported from the nucleus of the cell to the ribosomes of the cell.

Which feature would you expect to find in a population in which sexual selection depends on male competition?