Cell Membrane is a thin external covering.
Cytoplasm is a jello-like substance holding cell parts in place. Ribosomes are tiny circle attached to rough ER or separate in the cytoplasm.
Answer:
It's C
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The correct answer of the given question above would be option D. The hypothalamus is involved in sleep as a response to decreasing light, the hypothalamus suprachiastmatic nucleus causes the pineal gland to increase production of melatonin. The hormone melatonin is responsible for maintaining the circadian rhythm of the body.
Because the charge of electrons is opposite in sign than protons, the two types of particles attract each other, and this force, known as the Coulomb force, holds the atom together. Electrons travel around the nucleus in orbitals, but it is impossible to know both the speed and location of an electron at the same time.:) let me know if this helped
Green plant cell photosyinses