A gene mutation is when chemical changes occur in DNA of individual cells. True or False

Taq polymerase is an enzyme isolated from the organism thermus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes.

In an controlled experiment, why is it important to change just one variable at a time p. s it a science question but they didn't have a science button

Which test would tell the presence of melena? barium enema upper gi series stool culture stool guaiac abdominal ultrasonography?

What are the two factors that create metamorphic rocks?

Agriculture led to an increase in the size of the human population. Which of the following was the most important impact of agriculture on the human population size?

The process of sediments being compacted and cemented to form sedimentary rocks is called A. metamorphism. B. deposition C. crystallization D. lithification

What is presumptive identification of a microorganism?

Which statement best describes the climate of a city? Select one: The average annual temperature of Austin, TX is 68.5°E San Antonio, Texas had a high temperature of 102°F today. Dallas, Texas had 8.6 centimeters of rain today.

A food manufacturer performs a study on their new brand of cereal. In the study, the food manufacturer compares their brand of cereal to two other brands in terms of vitamin and mineral content.

What tree disease was spread to North America by a fungus carried on insects embedded on wood imported from northern Europe?