Which of the following is not true of greenhouse gases?
a.
they absorb earth’s radiation.
b.
they are produced solely by human activities.
c.
they are transparent to incoming solar radiation.
d.
they include carbon dioxide and water vapor.

How does natural selection change thephenotypes within a population over time?

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.

What are the pros and cons of transect sampling?