An ecosystem generally requires solar energy, nutrients, decomposers, consumers and . Select one: a. conformers b. decontaminators c. directors d. producers e. concentrators

D. Producers

Explanation:

They are an important link in the ecosystem. They produce food by photosynthetic processes through the help of soil nutrients, sunlight(solar energy) and Carbon dioxide.

The food they produce are eaten by the consumers such as animals and other small organisms. The animals/ organisms also serve as food for larger animals(carnivores)e.g lion, whale, tiger and omnivores e.g. Man

d

explanation:

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.