Hydrogen is group with alkali metals because it a. is a metal b. has one electron in its outer energy level c. it is a gas d. does not readily form compounds

I think it's B.

Explanation:

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Hello There!

Hydrogen is group with alkali metals because it "does not readily form compounds"

Hydrogen is found in many substances. Our body needs Hydrogen because essentially everything we see contains Hydrogen.

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

light dependent reactions:

light independent reactions:

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