Diffusion is the movement of a molecule from an area of higher concentration to an area of lower concentration.

True or False?

Choice A rationale: Microwaves are a type of electromagnetic radiation with low energy and long wavelengths. They are not absorbed by plants for photosynthesis, but rather pass through them or are reflected by them¹.

Choice B rationale: Infrared is a type of electromagnetic radiation with low energy and long wavelengths. It is not absorbed by plants for photosynthesis, but rather heats up the plant tissues or is reflected by them².

Choice C rationale: Gamma rays are a type of electromagnetic radiation with high energy and short wavelengths. They are not absorbed by plants for photosynthesis, but rather damage the plant cells or are blocked by the atmosphere³.

Choice D rationale: Ultraviolet is a type of electromagnetic radiation with high energy and short wavelengths. It is not absorbed by plants for photosynthesis, but rather harms the plant pigments or is filtered by the ozone layer⁴.

Choice E rationale: Visible light is a type of electromagnetic radiation with moderate energy and wavelengths. It is the only form of electromagnetic radiation that is absorbed by plants for photosynthesis, specifically by the pigments such as chlorophyll and carotenoids in the photosystems⁵. Visible light consists of a spectrum of colors, ranging from violet to red, and plants use different colors for different aspects of photosynthesis⁶.

Choice A rationale: Low, high is incorrect because it is the opposite of the direction of simple diffusion. Simple diffusion is the passive movement of molecules along their concentration gradient, which means from high to low concentration.

Choice B rationale: Low, equal is incorrect because it is not the final state of simple diffusion. Simple diffusion will continue until the concentration of molecules is equal on both sides of the membrane.

Choice C rationale: Equal, low is incorrect because it is not possible for simple diffusion. Simple diffusion will stop when the concentration of molecules is equal on both sides of the membrane, and there will be no net movement of molecules.

Choice D rationale: Equal, high is incorrect because it is not possible for simple diffusion. Simple diffusion will stop when the concentration of molecules is equal on both sides of the membrane, and there will be no net movement of molecules.

Choice E rationale: High, low is correct because it is the definition of simple diffusion. Simple diffusion is the passive movement of molecules along their concentration gradient, which means from high to low concentration.