Caenorhabditis elegans provides a model for connecting genomics and development because (select all that apply):

Cell divisions are invariant allowing developmental tracking and genetic events that disrupt the normal fate.
The adults and eggs are transparent allowing visualization of developmental activities.
The normal cell lineage of every cell is known permitting identification of misplaced cells due to altered genetic events.
The adult forms are composed of millions of cells providing lots of opportunities to follow development.

the correct answers is "The adults and eggs are transparent allowing visualization of developmental activities."

Explanation:

This species of living being was considered very important for biology in the aspect of genetics and its development since it is transparent against light and this favors its visualization for biological analysis.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.