Which statement is an example of a scientific theory? A.
Hummingbirds do not like the color white because they visit other colored flowers more often.
B.
The amount that caffeine affects a person's heart rate differs based on the person's age.
C.
The Earth is the third planet from the Sun and has one moon, which orbits the Earth.
D.
All living organisms are composed of one or more cells, which came from pre-existing cells.

Plz ! ive been stuck on this forever

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.