If a population of deer exceeds its carrying capacity, it is likely that the
a. population will crash
b. population will become extinct
c. carrying capacity will increase
d. birth rate will increase

The answer is a. population will crash.

A carrying capacity is the maximum size of some population that can survive in the given environment. It represents the number of animals that can live, reproduce, survive in the given area regarding the indefinite sustainability of this area in terms of resources (food, water, habitat, etc.). If the animals reach the maximum number, thus, carrying capacity, the population will crash, which means that the number of animals will radically decrease due to diseases or predators.

Take a guess, what do you think?

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.