What characteristic is shared by birds, salamanders, and sharks?

A. Four limbs

B. Jaws and paired appendages

C. Endothermy

D. Lungs

How are white-tailed deer influencing the restoration of coniferous forest along Minnesota's north shore of Lake Superior? a) they don't affect that ecosystem. b) they spread seeds causing them to grow. c) they eat them before they can grow

A comprehensive test was given to students after they had studied their textbook material either in silence or with a television turned on. What is the independent variable? What is the dependent variable?

The process of extracting from the environment elements that remain stable is referred to as:

What is a stomach? Explain its role in digestive system

10. Which cell part contains the chromosomes? A. Ribosomes B. cytoplasm C. Golgi bodies D. Nucleus

Why are old rocks rare on the ocean floor

What is a storage form of carbohydrate energy?

How Do Soils Form? A. Erosion transports mineral particles, and plants die and decay. B. Plants provide organic matter and minerals to make soil. C. Weathering breaks rocks into minerals, and plants die and decay. D.

Darwin noticed that birds that were good at finding scarce food in the winter had a better chance of surviving and producing offspring.

The chart below shows the codons that make up the genetic code and the sequence of nucleotides that corresponds to them. A mistake during DNA replication leads to a mutation in the nucleotide sequence shown below.