An infection begins when a pathogen or parasite begins to cause symptoms of a disease.

How many electron pairs does carbon share in order to complete its valence shell?

Which sedimentary rock is burned to produce energy? coal iron ore rock salt limestone Answer: coal

It is important for a food business to keep out flying insects. Screens on kitchen doors can be very effevtive as long as the screen mesh is the right size, there are no tears and

For each statement, choose the term that completes the sentence. play many roles in the body and determine many traits. In humans, is responsible for traits. is the blueprint for proteins. The section of DNA that codes for a specific trait is called.

What happens to pyruvate molecules formed in glycolysis in the absence of oxygen? A) they will enter the krebs cycle. B) they will undergo the process of fermentation. C) they will move directly to the electron transport chain.

When parents are going to have a child what are the chances of a female offspring a. one in two b. two in five c. one in four d. 100%

Which statement is true of the nucleus of a cell

The extent to which traits, abilities, or IQ scores may increase or decrease as a result of environmental factors is called:

A cell that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds.

To test the responsiveness of the kidneys, scientists have designed an experiment tracking urine output of people during a normal day, while regulating the in-take of water by mouth. What would be an appropriate hypothesis for this experiment?