Which two layers of the atmosphere are responsible for the majority of the solar radiation absorption?  
the stratosphere and the troposphere
the stratosphere and the thermosphere
the mesosphere and the thermosphere
the troposphere and the mesosphere

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

What element does susan b. anthony include in this passage to strengthen her argument?

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables