4. The human population has experienced unchecked growth for the past 200 years. What does "unchecked" mean? A. Slow b. At a steady rate c. Unrestrained d. Dangerous

B

Explanation:

The correct option would be B

The human population experiencing unchecked growth for the past 200 years does not mean that there were no restraining factors that limit the population. Factors such as death, competition for resources, diseases, etc., were still present.

Despite the limiting factors, the population has been growing. Hence, the correct word to replace 'unchecked growth' would be 'at a steady rate'.

Slow and dangerous really have nothing synonymous with unchecked growth.

The correct option is, therefore, B.

answer; both surfaces of the membrane are nonpermeable

d we did this already