Solve for number of electrons that oxygen has in its first energy level

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?

What process creates gametes? a.fertilization b.mitosis c.meiosis