Which of the following is NOT a common element to all living things?

The atmosphere is rich in nitrogen and oxygen but contains little carbon and hydrogen.

It is the largest percentage of elements in the atmosphere.

It is the smallest unit of matter that retains all of the chemical properties of an element.

Protons are much smaller in mass than electrons.

The basic functional unit of life is a cell and all organisms are made up of one or more cells called _______.

All the individuals of a species living within a specific area are collectively called ____.

Organisms acquire energy that is passed from one organism to another. This is called _______.

It is the number of individuals of a particular species within a specific area.

It is the way individuals are spaced within the area.

He is an English clergyman who published a book entitled, An Essay on the Principle of Population.

$$\frac{dN}{dt}=r\times N$$  , where $$\frac{dN}{dt}$$  is called

When resources are limited, populations exhibit logistic growth.

In the logistic growth model, If population size equals the carrying capacity, the population growth rate will be zero.

A wildlife ranch currently has a population of polar bears whose death rate is 0.05 and birth rate is 0.12 per year. This particular ranch is isolated from other suitable habitats so there's no immigration into or emigration from this population. This population is experiencing logistic growth and currently has 550 bears. If the population growth rate for the year was 36 bears, what is the carrying capacity of the preserve?