A population pyramid is an illustration that shows the distribution of which groups in population?
a Age and Sex
b Age, Sex, and Income
C Sex only
d Age only

Which of the following is the most likely result of converting forestland to urban development? a. the amount of land available for lumber production decreases. b. fewer trees are needed because cities are made mainly of concrete. c. people discover more efficient ways to grow trees. d. the price of lumber goes down.

The cluster of developing cells from conception until birth is called an

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give