At the lowest biological level, groups of cells that have a similar structure and function work together as

Tissues

Explanation:

Similar cells come together to form a tissue. A tissues is a collection of cells of similar type that are specialised to perform the same function. They include epithelial tissue, connective tissue, blood tissue. These specialised tissues can work together forming organs of the body. The organs work together to form organ systems.

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

hope this

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 : )