When wind creates a sand dune, the sheltered side of the dune has no incline
has a more gently sloping angle than the windward side
is steeper than the windward side
O has the same incline as the windward side

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 : )

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

. ph changes the ability of them he enzyme to dissolve in water.

c is the answer to this question. altitude affects the weather because air molecules evaporate.