The series of changes that occur after a disturbance in an existing ecosystem is called

a. primary succession

b. secondary succession

c. disturbance succession

d. pioneer succession

Why isn't coal considered a mineral?

Most popular blood type

The lethal tumor dose is defined as the dose that will eradicate what percentage of the tumor yet preserve normal tissue

What happens to the amount of energy that is used up during photosynthesis? It changes to an equal amount of chemical energy. It changes to a lesser amount of chemical energy. It changes to a higher amount of solar energy.

The haploid number in humans is: a. 2 b. 22 c. 23 d. 46

The failure of homologous chromosomes to separate during meiosis is called a. skin disorders b. translocation. c. nondisjunction. d. Down syndrome.

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

The most obvious source of gene flow into any population is A) Emigration B) Immigration

Polypeptides and proteins must fold properly to be functional. Hydrogen bonds between the oxygen and nitrogen atoms of the peptide bonds are crucial to which level of protein structure?1. primary structure2. tertiary structure3. secondary structure4.

A particular gene can have two forms, called alleles. which statement best describes the difference between the dominant allele and the recessive allele? (a) only the recessive allele is expressed when both alleles ate inherited.