Answer:
size and amount of yolk
Explanation:
The main difference between the eggs of a frog, bird and mammals is their size. The size of frog egg is small as compared to bird and mammals. Egg laying mammals have bigger egg . The similarities between eggs of frog, bird and egg laying mammals is the high amount of yolk in the egg which is used as a source of food by the embryo that is present inside the egg during the developmental stages.
Inferior mesenteric artery
The part of the colon located distal to the left colic flexure is derived from the hindgut is supplied by the inferior mesenteric artery. The distal part (lower third of the rectum) is supplied by the internal iliac artery. The ileocolic artery supplying the cecum is a branch of the superior mesenteric artery.
Answer:
Question is incomplete i have added full question with explanation and reaction see attachment.
B) Viens
The veins have valves to keep the blood pumping out and not coming back in the heart.
Men have xy and women have xx chromosomes. the mens sperm is the chromosome that determines the sex of the child. x is female and y is male so the answer is male