Where does gas exchange occur in the respiratory system?

a. bronchi

b. alveoli

c. trachea

d. epiglottis

Similarities and differences between mitosis and meiosis

What major advantage would analyzing a person's hair for toxin exposure provide over analyzing their blood or urine for toxins if a person went into a hospital for a diagnosis of increasing pain over time? A.

How are tissues, organs, and organ systems similar

Which of the following structures is an extension of the petiole into the leaf blade? lamina mesophyll midrib

The raised ridges of cardiac muscle found in the ventricles are called the

The sudden death of brain cells when their blood supply is interrupted is called

In a population of giraffes, dark brown spots are the result of a homozygous recessive condition. if the frequency of the allele for this condition is 0.

What is the purpose of your answer for question #1? A) can only move substance into the cell with the use of ATP B) is only used to remove large waste products from the cell C) are specifically meant to carry the smallest ions in and out of the cell

The organisms that produced the oxygen gas in Earth's early atmosphere were

Name three characteristics of gas giants that make them different from terrestrial planets.