Why should the uterer be less robust than the vas deferens

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!

answer: b

coz red blood cells marrow and circulates the body for 120 days.