Which statement summarizes the theory of common ancestry? Select one:

All living things on Earth are related.

All living things on Earth are the same species.

Groups of living things on Earth share common ancestors but are not related to each other.

All living things on Earth depend on the sun for their energy.

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.