Which of the following resulted from a genetic variation that was favored by natural selection?

A. cancer in a lab rat

B. the long neck of a giraffe

C. the small size of a Chihuahua

D. smoothness of a river rock

Similarities and differences between nucleotides

What happens if a unicellur organism's cell dies?

Why are verifiable experiments so important to the scientific method

What is the skeleton of an embryo mainly composed of?

Why is oxygen a molecule but not a compound? A) It only contains atoms of single elements B) It contains atoms from different elements C) Oxygen can''t form compounds D) Only ions form compounds

Problems the vegetable vendors face in their job

Which statement best describes why electrons are typically not included when determining the mass of an atom? The charge of a proton cancels the charge of an electron. The protons and neutrons are much more massive than the electrons.

What did the evidence that Darwin collected during his voyage on the HMS Beagle allow him to accomplish? A. to propose the theory of artificial selection B. to propose the theory of evolution by natural selection C.

List four types of evidence used to organize organisms in systematic taxonomy

Which statement is true about BRCA1 and BRCA2 genes? These genes were discovered in 1953. Cancerous tumors often form on these genes. People can be tested for mutations on these genes. Mutations of these genes lead to diabetes.