Ptolemy's model was Geocentric. This means that it put the earth at the center of the solar system, instead of the sun, with all celestial objects orbiting it. The first person to prove the validity of the heliocentric theory was Nicolaus Copernicus.
The miThe migration of birds.
Answer. They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers.
Answer:
we need the animals and shark in the food change
Explanation:
Answer:
option D
Explanation:
Negative feedback is a mechanism in which function of a cell or an organ is decreased. It lessened the output of a system and maintain system function which is known as homeostasis. It is a regulatory mechanism of normal physiology. Some of examples are
blood sugar level regulation, regulation of blood pressure, thermoregulation and many more.
