The "Cambrian explosion" refers to a. the creation of Earth. b. the development of the first true cell. c. the origination of life. d. the origination of all major phyla of animals. e. the mass extinction of dinosaurs.

What are three effects that an increase in urbanization can have on air quality

Hans was locked in a large closet for the first four years of his life. A caretaker would bring him food and water and an occasional clean blanket. When Hans was rescued, how would his brain compare to that of a child raised in normal circumstances

In what way are family, religion, health care, politics, and mass media alike?

What do you think happens to a fish's behavior in cold climates during winter explain

In humans, cystic fibrosis is a recessive genetic disorder that results in mucus clogging major organs. If both parents are genetically heterozygous for cystic fibrosis, then what are their chances of having a child with the disease?

An organisms ability to maintain its proer condition

1 Chromosomes move to the middle of the cell during what phase?

A change in a gene due to damage or incorrect copying is called a evolution. c. segregation. b. meiosis. d. a mutation.

The risk of injury in a car accident is much greater if occupants do not wear a seat belt. Wich of newton's laws explains why this is true? A. Law of inertia B. Law of force and acceleration. C. Law of action-reaction D. Law of gravity

Why does the United States experience winter during the months of November through early March