(15 points + brainliest) what is true of carbon atoms? -- a) they are not found in living organisms. b) they have five valence electrons. c) they can form up to four covalent bonds. d) they do not bond with other elements.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.

The relationship between intron and exon