Which of the above characteristics would be most in developing a classification system for the fish?

a.

body color and tail shape

b.

body color and number of fins

c.

number of fins and presence of scales

d.

presence of scales and tail shape

its A. body color and tail shape on study island

Explanation:

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )