Uranium - 235 has a half-life of 700 million years. How much of the 12g sample of uranium would be left after 2100 million years?

A. 1.5 g

B. 6g

C. 3 g

D. 75 g

A survey on the Pacific coastline of California shows that kelp is currently being harvested faster than it can grow back. How would this resource be classified? A) Renewable B.) Nonrenewable C.) Potentially renewable D.) Primarily nonrenewable

You are studying a disorder that is based on the genetic composition at three loci. Assume that a dominant allele at any locus adds 6 units of risk for the disorder and that a recessive allele at any locus adds 2 units of risk for the disorder.

Which statement about basaltic magma is false? a. It forms when rocks in the upper mantle melt b. It contains small amounts of silica c. It has high viscosity d. It forms on oceanic and continental crust

Hairy ears are inherited as a Y-linked trait. A man with hairy ears has a daughter who has a son with a man who does not have hairy ears. What is the probability that the hairy-eared man's grandson has hairy ears?

Which of these is an organism? A. Virus B. Heart C. Bacteria D. Lung

What genotypes would be produced by crossing a grasshopper with both color stripes and one with yellow stripes

Why should you not use the term percent to indicate a portion of a larger quantity?

Are mackeral sharks alive today

Which of the following is an intrusive igneous body A. pyroclast B. lathar C. batholith D. lava flow

Nephrons are part of which of the following structures?