The exchange of gases between the blood and body's cells is called

a. breathing

b. internal respiration

c. external respiration

d. cellular respiration

Match the type of exercise with each example. walking drills are. burn (s) the most calories. sprinting drills are. can put a strain on the joints. during, one foot remains on the ground. can be a walking drill with a 20 second jog included in it.

During a total solar eclipse, you observe a red ring in the sky. Which part of the Sun are you seeing?

Which of the following characteristics would make an organism less likely to face extinction? A.) low reproductive rate B.) fixed migration patterns C.) diverse diet D.) commercially valuable and hunted for skin or fur

What would most likely happen if the amount of phytoplankton in the ocean were reduced?

Describe tectonic plates and explain how they "float" on the Earth's surface (what do they float on and what causes their movement

What are the three main body segments in arthropods? a. cephalothorax, abdomen and appendages b. thorax, appendages and spiracles c. head, cephalothorax and appendages d. head, thorax and abdomen

What organelle in a eukaryote cell is most noticeable under a microscope Nuclear envelope Nucleolus Ribosome Nucleus

How does extra nitrogen from crops affect producers in the ocean?

Why do dogs die from bloat

Which group could be elected to the Senate for life? Which branch of government in the Roman Republic was led by two consuls?