In a double covalent bond, a carbon atom shares
a_electrons in two of its shells.
b_both valence and non-valence electrons.
c_two electrons.
d_electrons in two orbitals.
e_none of the above.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Which of these is a provisioning service people get from the ocean

Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?