Diffusion is the movement of particles across a semi-permeable membrane from a lower concentration to a higher concentration
Answer:
There is only enough food for a few top level consumers
Explanation:
The organisms that eat the producers are the primary consumers. They tend to be small in size and there are many of them. The primary consumers are herbivores (vegetarians). The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers. The secondary consumers tend to be larger and fewer in number. This continues on, all the way up to the top of the food chain. About 50% of the energy (possibly as much as 90%) in food is lost at each trophic level when an organism is eaten, so it is less efficient to be a higher order consumer than a primary consumer. Therefore, the energy transfer from one trophic level to the next, up the food chain, is like a pyramid; wider at the base and narrower at the top. Because of this inefficiency, there is only enough food for a few top level consumers, but there is lots of food for herbivores lower down on the food chain. There are fewer consumers than producers.
<span>makes a copy of itself during cell division. </span>
White blood cells move into and out of blood vessels by the process of chemotaxis
Answer:
What are nutrients?
Nutrients are substances that are derived from food which aids biological activities and are necessary for the body
Nutrients are needed by the body to derive energy from the food and liquid we take.
The main nutrient our body make use mostly is the carbohydrates, fats and protein which are used for energy. Also water is also used in the body for transportation of nutrients
Explanation:
