What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?

Carbon

Explanation:

The number of protons is equal to the atomic number of the element. For this element having 6 protons makes the atomic number 6 and makes the element Carbon. For this element 6 protons and 6 neutrons combine to make an atomic mass of 12 amus.

mendel's first law states that during the formation of reproductive cells , pairs of hereditary factors for a specific trait separate so that offspring receive one factor from each parent.

explanation:

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation