Answer:
Aristotle first wrote about the practice of animal testing in ancient
Greece during the third century BC.
Explanation:
Answer:
Sarcomeres are functional units of skeletal muscle fiber.
Explanation:
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They move through the ecosystem
Answer: Respiration in Animals.
Explanation:
This is a body systems which involves the intake of oxygen, and the release of carbon dioxide ,(breathing),for the breakdown of digested food substances for example (glucose), to generate energy.
Most organisms make s use of oxygen for survival they are aerobes, while some organisms thrived in absence of Oxygen; these are anaerobes.The
Answer:
A pair of nephridia is present on each segment of the earthworm, They are similar to flame cells in that they have tubules with cilia and function like a kidney to remove wastes.
Explanation:
