Which is the best description of a molecule? A molecule of an element is composed of at least two types of atoms.

A molecule of a compound is composed of only one type of atom.

A molecule of a compound is composed of at least two types of atoms.

A molecule of an element is composed of exactly two types of atoms.

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Give an example of a trait that is controlled by more than one gene.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.

[34 points awarded to the best answer, use facts and/or data] 1.) what's the likelihood of thunderstorms occurring in the state of maryland? {this question is for a project for science, use facts and/or data and explain why . 34 points to the best answer]