Placement mammals develop

a. in a egg laid in water

b. in a pouch on their mothers body

c. inside the mothers body

d. inside a amniotic egg

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane

What two categories of toxins were present in the air at dish,texas as a result of the gas pipelines that pass through the area