San francisco, california has a population of about 80,000 and has a land area of about 47 square miles. houston, texas has 2.1 million people in an area of about 579 square miles. which city is more crowded?

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.

Archaebacteria use for movement. celia flagella pili cell walls

What is the chemical formula for dihydrogen monoxide?