A. Sharks store enough urea to match the total solute concentration of the surrounding seawater
Answer:
a) i. low, ii. high, iii. low
Explanation:
Answer:
Nitrogen is essential for all living things because it is a major part of amino acids, which are the building blocks of proteins and of nucleic acids such as DNA, which transfers genetic information to subsequent generations of organisms.
Answer:
so they can squeeze through blood vessels more quickly.
Explanation:
Some white blood cells have nuclei that are lobed, or separated into pieces, Other white blood cells act as factories making anti-germ weapons and need big nuclei to store the DNA to make those weapons.
