How have conditions for life on Earth changed over time?

a.

separation of continents

c.

both a and b

b.

ice age

d.

neither a nor b

Australopithecines have been found mainly in two african regions. these areas exhibit unique geological conditions that have allowed fossils to be preserved for millions of years.

The anaerobic process is different from complete cellular respiration because a) more oxygen is produced in the anaerobic process b) oxygen is not needed for anaerobic respiration c) water is not an end product of complete cellular respiration d)

Blue whales have 44 chromosomes in every cell. determine how many chromosomes you would expect to find in the following:Sperm cell:Egg Cell:Daughter Cell from Mitosis:Daughter Cell from Meiosis II:

What are some factors in an environment that can affect carrying capacity

Physical removal of an invasive species is an example of

If a plant has vascular tissue, megaphylls, and seeds, but not flowers, then it is a (n): A. lycophyte B. fern C. bryophyte D. angiosperm E. gymnosperm

Provide a pathway to let molecules go across the cell membrane

How did the scientist keep the worm stationary under the microscope so that he could see the cells divide?

Landfills are waste disposal sites. They are often man-made depressions in the ground covered with a lining designed to prevent any leakage of waste materials.

What is a gnat? an insect or a crustacean