Answer:
SA node
Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.
The light-dependent reactions require light and water, occur in the thylakoids, and produce ATP and NADPH. The light-independent reactions require carbon dioxide, occur in the stroma, and produce high-energy sugars. What are the three primary factors that affect the rate of photosynthesis
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Answer:
The correct answer is D
Explanation:
That's why in the graph the best reaction of the enzyme is on 40° C.
On low temperatures the enzyme activity is too low.
On very high temperatures it fall, so the enzyme works better in the middle temperatures.
Carnivors eat meat herbivores eat plants and herbivores have smaller teeth because they don't chew meat
Answer: B
Explanation: Lysosomes are membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers—proteins, nucleic acids, carbohydrates, and lipids.
