Scientists initially believed that viruses were alive because they contained a nucleic acid and they behaved like

Which of the following is an example of a steroid A. oil B. cholesterol C. starch D. wax

What is the main difference between a producer and a consumer? Give an example to support your answer

A color-blind (X-linked recessive) human with Klinefelter syndrome has parents both of whom have normal color vision. 4a. From which parent did he receive his extra X chromosome? Explain

What is the name of a major source of energy for the body?

Natural selection is the only mechanism of evolution that will lead to what

Which valve prevents backflow into the right atrium?

The biomolecule described is a

Chemical reactions in cells are faster than the same reactions outside cells. True False

What are WBCs and what do they create to fight off infections?

Which term names the replacement of living cells with minerals to form a rock-like fossil of a living thing? A. mold fossil B. petrified fossil C. cast fossil D. trace fossil