It allows more oxygenated blood to be delivered to the muscles.
<span>Information gathered from observing a plant grow 3 cm over a two-week period is called data</span>
<span>Energy must constantly flow through an ecosystem for the system to remain stable.</span> it means that organisms must eat other organisms
The brain loses 5-10 percent of its weight between the ages 20 & 90.
Answer:
Option A, most closely related to mammals
Explanation:
Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.
All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other
Hence, option A is correct
