Which did not result from acceptance of the germ theory?

improved hygiene

sterile surgery

better water treatment

increased death rate

Which substance in cigarettes is a thick, brownish sludge containing carcinogens?

Explain artificial selection. Describe how artificial selection explains and support Darwins theory of evolution.

Which option best explains why nutrients for epithellal cells are obtained by diffusion from the underlying connective tissue?

Which of the following marine ecosystems consist of and of frantic which of the following marine ecosystems consist of an aphotic zone? A. The wetland B. The intertidal zone C. The costal ocean D. The open ocean

Which of the following molecules is used to make radioactively labeled DNA? A. Radioactive nucleotide, B. Glucose Monomer, C. Amino acid, D. Fatty acid

Wavelike contractions of the digestive tract that propel food along are called

The factor most likely to result in a decrease in the size of a specific population

What are your opinions on the evolution of chordates from hemichordates?

What is the name for a large region with consistent organisms and weather?

What health problems can chemicals in the environment cause? a. cancer c. chronic disease b. birth defects d. all of the above