Which statement is true of cancer?

Mutations in certain genes cause tumors.

Tumor cells lack growth factors and DNA.

DNA mutations are unrelated to cancer.

Cancer results when cells stop dividing.

Fires are important to Savanna ecosystems but not grassland ecosystems. t or f

Suppose some organisms ferment lactose but can't use citric acid for all their carbon needs. These organisms must be A) Shigella. B) Salmonella. C) Escherichia. D) Citrobacter.

A nurse is working in a clinic where a family member's spouse is treated for a sexually transmitted disease. the nurse is concerned about the risk to her family member. what is the most appropriate action for the nurse to take?

Describe the properties of the sun

What's the difference between an endoskeleton and an exoskeleton

If it were part of a food web, a pigeon could be eaten by

In human females, the ovaries play a role in several body systems and the interactions among these systems. Which body system would be most affected by damage to the ovaries? * A. Endocrine System B. Reproductive System C. Immune System D.

Metalloids have full valence shells of electrons

Which mineral is used in making cans and is found mainly in Australia? hematite bauxite tektite magnetite

Suppose you need to build a raft and what chemical physical properties will be needed