Scientists always identify biodiversity hotspots by counting the number of endemic species.
a. true
b. false

The Correct Answer is True.

Explanation:

The United States has passed a law in 1973 to protect its biodiversity

has three major parts:

c

explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.