Pelicans and humans have complex heart because there is need
for them to deliver more oxygen per liter blood to the body. Also, there heart is made up of four chamber and they have high
metabolic rate which necessitate them to supply efficient blood throughout the body.
The answer is A. Xylem is for water, phloem is for sugar and water (which is the food).
<span>A) The first law - The head moves until a force stops it. </span>
Answer:
3, 1, 4, 5, 2
Explanation:
DNA helicase enzyme will unwind DNA into 2 segments for a template. Complementary nitrogenous bases will attach themselves to one of the DNA strands. mRNA carries codons for instructions from DNA. mRNA leaves the nucleus and joins with a ribosome (tRNA) in the cytoplasm. tRNA has anticodons which are complementary to a specific mRNA molecule. tRNA pairs with and translates instructions that the mRNA is carrying. Each amino acid delivered to the ribosome by tRNA begins forming a chain of amino acids, called a peptide bond.