Answer: E. When one contracts, the other relaxes and this allows the bones to move; triceps and biceps.
Explanation:
Antagonistic action occurs between the two pairs of muscles. In this action one muscle while contracts other muscle relaxes. The example of antagonistic pair is of biceps and triceps. The triceps remain in the relax phase while the biceps contracts so as to lift the arm.
Answer:
D. A nucleus
Carbon contains four electrons in its outer shell. Therefore, it can form four covalent bonds with other atoms or molecules. The simplest organic carbon molecule is methane (CH4), in which four hydrogen atoms bind to a carbon atom
You’ll need to attach an image showing the choices or type them. But structures that are found in both plant and animal cells include the cell membrane, ribosomes, cytoplasm, and DNA.
