Answer: A it orbits the sun
Explanation: For a planet to be a planet it must have a high enough mass to have a gravitational pull and must orbit the sun since Pluto does both it should be classified as a planet
Answer:
They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.
Explanation:
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Answer: Photoreceptor cells
Explanation:
The human eye and brain together translate light into color. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. ... Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors thus, we have two types of photoreceptor cells, known as rods and cones. Cone cells deal in colour, while rod cells allow us to see in grayscale in low-light conditions, for example at night.
Osmosis is the process by which molecules of a solvent pass through a semi-permeable membrane from a less concentration to a higher concentration.
Diffusion is the passive movement of molecules from a higher concentration regions to a region of lower concentration.
Active transport is the movement of molecules against a concentration gradient.
Bulk transport is the movement of macromolecules into or out of the cell
