Alarge amount of algae in a lake are results of a) global warming b) rain forest deduction c) phosphate and nitrogen pollution d) a decrease in the number of decomposers

C) phosphate and nitrogen pollution

Explanation:

Eutrophication is a phenomena in which the water body which consists of high concentration of fertilizers drained in a water body by agricultural field runoff. The fertilizers typically composed of phosphates and nitrogen results in growth of aquatic plants and extensive algal growth on the surface of water. This leads to the depletion of oxygen levels in the water body. As a result of this the water exhibit a foul smell and the aquatic animals decline in numbers.

According to the given situation, the large amount of algae in a lake is because of the increase in the phosphate and nitrogen pollution. The increase in concentration of the phosphate and nitrogen will lead to the phenomena of eutrophication.

A. The model shows the process of endocytosis.

B. The process shown in the model requires energy from the cell.

Explanation:

The model shows endocytosis process. It is an active process i.e. it requires energy from the cell. In endocytosis particles like whole cells or part of cells are engulfed by another cell. Cell membrane plays an important role in this process. It invaginates to form a pocket around the incoming particle. This pocket is pinched off and the particle is contained in the newly formed vacuole from the cell membrane.

Endocytosis can be of two types, phagocytosis and pinocytosis. In phagocytosis, large particles like cells are taken in by the cell. In pinocytosis, cell takes in small solutes dissolved in extracellular fluid.