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The answer is :
D. The formation of a receptor-ligand complex.
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Answer:
It is Biosphere.
The Biosphere --contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth. Within the biosphere, living things form ecological communities based on the physical surroundings of an area.
This change demonstrates that some characteristics can be lost in evolution.
In the case of Chondrichthyes, boneless fish like sharks and rays, the skeleton made out of bones that were present in the common ancestor of them and other vertebrates was slowly changed for <span>cartilage which enabled these fishes to move agiler in the water.</span>
Answer:
No they can not produce a child with a blood type
Answer:Volcanic eruptions are very dangerous events.
Explanation:Models represent objects, events, and processes in the real world.
Models are often used when an object, event, or process occurs too slowly or too quickly; is too small or too large; is too complicated or too dangerous.
Volcanic eruptions produce both molten lava and poisonous gases. Therefore, eruptions can be very dangerous. Many volcanologists have lost their lives while observing volcanic eruptions.