8. Materials essential for development are transported to a human fetus through the: A. Fallopian tubes
B. Egg cell
C. Reproductive hormones
D. Placenta

When organisms are classified ,they are given a two part name

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.

The hardy-weinberg principle is that genetic frequencies in a population? will remain stable from generation to generation will always be changing will not be affected by environmental changes are always in a 3: 1 ratio