The process of excretion begins with which structure?

A. urethra

B. ureters

C. kidneys

D. bladder

If element X has 60 protons, how many electrons does it have?

Which type of air has a relative humidity of 100 percent?

Which statement best describes an energy pyramid?

Which statement best describes the structure of DNA? A. A single strand of amino acids B. A single strand of nucleotides C. A double strand of nucleotides D. A double strand of amino acids

A population of beetles exists in which black coloration is dominant to white. If there are 64 black beetles in the population, what is the dominant allele frequency?

Which life cycle describes a plant that reproduces asexually and sexually? A. egg + sperm → embryo → adult with all its chromosomes → gametes → adult; gametes produce an organism with half the chromosomes B.

What would happen to the mass of a cell in a hypertonic, isotonic and hypotonic?

How do air and water movement, and land masses affect the climate

Under what circumstances does membrane transport always require energy?

What is one disadvantage of using plasma gasification to detoxify hazardous waste?