What type of succession takes place when there is no existing biotic community or soil to begin with?

a. primary succession

b. secondary succesion

c. tertiary succession

d. none of these

What substances remain in wastewater after effective secondary treatment?

What do DNA stand for

A fruit fly has 4 individual chromosomes. how many chromosomes are in a somatic cell of a fruit fly? the egg of a fruit fly has 4 individual chromosomes. how many chromosomes are in a somatic cell of a fruit fly? 8 2 16 4

Which of the following features is found in an insect? indeterminate embryonic cells radial cleavage in embryonic cells coelom formed by a split in the mesoderm

Restate What produces the Moon's revolution around Earth?

Freud believe that certain troubling symptoms could be traced to painful unconscious memories. This led him to suspect that these symptoms resulted from

Reducing the volume of a gasits pressure if the temperature of the gas and the number of particles are constant.

Salt deposits form on a car in the winter. Over time, the salt covers more of the car. Is the salt alive? a. Yes, salt deposits are alive because they maintain their structure. b. No, salt deposits are not alive because they do not reproduce. c.

Belinda recently completed a treatment program for breast cancer. For the last year, she took a drug treatment that worked to interfere with rapid cell division; what type of cancer treatment did Belinda undergo?

What do scientists call the theory that the universe will shrink in the future?