How often does an el niño event occur?

a. about every other year

b. every 10 years

c. about every 2 to 3 years

d. about every 3 to 7 years

17. Acid precipitation is caused by a mix of a. respiration, carbonic acids, and seawater. b. water, soil, and air. c. sulfur dioxide, carbon dioxide, and nitrogen oxides. d. hydrogen, oxygen, and saline.

Can we feel plate movement when there isn't an earthquake?

State one reason that there are more earthquakes in the western section of the united states?

A segment of DNA shows bases in this order AGT CAC GCA, complete the corresponding DNA strand: TCA GTG? A) ACG B) CGT C) GCA D) TGC

the four steps of the scientific methods in order are hypothesis, observation, experimentation and conclusion TRUE OR FALSE

1. Synthesize Information How do you explain to the horse owner why this foal was born with OLWS while two previous foals were perfectly healthy? What would you tell the new parents of the baby girl about their prospects for having more children?

What organelle is the control center for the cell and holds the DNA

The primary structure of a protein refers to the sequence of amino acids that are linked together in a long chain. Which of the following common items would best represent the primary structure of a protein? O A.

How many chromosomes do humans have? how many copies in normal cells? How many pairs? How many copies in sex cells?

How many times has blastopore fate changed over the course of evolution? -o times -1 time -2 times - multiple times