Answer:
closed circulatory system
Explanation:
The blood is pumped through a closed system of arteries, veins, and capillaries. ... Still, blood can flow backward and the system is only slightly more efficient than the open system of insects. The closed circulatory system has more advantages over the open circulatory system.
Answer:
Rapid increase or accumulation in the population of algae
The answer would be, "B", "It's habitat is preserved".
Answer:
Norepinephrine is released by sympathetic nerves and this causes increase in heart rate.
So option d is correct. :)
Explanation:
Graph attached
Answer:
b. Less energy is needed to start reaction B.
Explanation:
The graph shows two different reactions and the energy required over time
a. More energy is released by the original reaction. - this is false, more energy is required for the original reaction to proceed
b. Less energy is needed to start reaction B. - this is true, the peak of the curve is lower showing less energy is required
c. The original reaction is catalyzed. - this is false, likely reaction B is catalyzed
d. Reaction B occurs at a slower rate.- false, they occur at the same rate.