At what point in the development of the embryo do you think a pregnant woman must begin to increase the number of calories she consumes?

Which property is used to identify the origin of an igneous rock? color density hardness crystal size

Plants that have reproductive structures called cones are?

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).