It’s an organ that is part of the circulatory system
The dependent variable would be the heart rates of her classmates.
Analagous structures. For example, both penguins and dolphins have torpedo shaped heads that help them adapt to their enviroments. They were both in different environments, but they developed similar adaptations to increase their ability to survive in their environments.
Nervous System Nucleus Nerve Cell Brain
Answer:
true
Explanation:
they refer to organisms and they are bisexual
