What part of the Respiratory System works as a gate keeper to prevent water and food from going down the trachea?

a

Epiglottis

b

Uvela

c

Lungs

d

Trachea

The parent plant reproduced asexually to form the daughter plant. If the leaf cells of the parent plant have 24 chromosomes, which two statements are true of the daughter plant? The daughter plant developed from a zygote.

Inside eukaryotic cells are membrane bound structure called

Define probability. Apply the term to a coin toss.

Which of the following substances cannot be a primary air pollutant? Carbon monoxide Smog Sulfur dioxide Nitrogen dioxide

Consider a population of fish in which two stripe patterns are observed, a single stripe or no stripes. A single stripe, S, is dominant to no stripes, s.

Which change shows a tenfold increase in concentration of H + ions?

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?