The human population on earth grew at an extraordinary rate during the 20th century, when it increased from 1.65 billion to 6 billion. what kind of curve would accurately show the changes in the human population during the 20th century? a. a life span curve b. an exponential curve c. a logistic curve d. a survivorship curve

The answer is B; exponential growth.   This is a phase of the S-shaped logistic curve of population growth that is characterized by a high birth rate and low death rate. The population doubles with each generation. Exponential growth is modeled by use of a J-shaped curve.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d