Chemical bonds that involve the total transfer of electrons from one atom or group of atoms to another are called

A. Covalen bonds

B. ionic bonds

C. hydrogen bonds

D. van der waals bonds

What do bacteria release that makes us feel ill?

To change food into simpler soluble molecules, physical and chemical changes occur; this process is known as

What would pass through the lumen of the esophagus?

A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has about 25000. Approximately 1000 of these genes are present in both cell types.

Which group of plants lack roots, seeds, and a vascular system? bsc2005?

Which sentences describe star clusters?

Which of the following is an advantage of nuclear energy over fossil fuels? A. Eliminates the need for mining. B. Uses a renewable energy source. C. Releases less CO2 waste products. D. Releases more CO2 waste products.

A cell with 46 chromosomes inside itsnucleus goes through one round of mitosis and cytokinesis. How manychromosomes are inside each of the two resulting nuclei?

The theory that explains how the earths surface is made up of moving rocky plates is called: A. Supercontinent B. Plate tectonics C. Sea floor spreading D. Continental drift

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis