Answer: The Quaternary structure
Explanation: Myoglobin and hemoglobin are both hemeprotiens with the ability to bind oxygen.
Myoglobin is mainly found in muscle tissue and plays a vital role as an intracellular storage site for oxygen. Myoglobin is a monomeric heme protein and has a secondary and tertiary structure. Hemoglobin is vital for the transportation of oxygen from the lungs to the rest of the body as needed. Hemoglobin is a tetrameric hemeprotien with secondary and tertiary structures.
Both hemoglobin and myoglobin are absent of a quaternary structure.
Asteroid impact
Volcanic eruptions
Explanation:
Asteroid impact and volcanic eruptions are two common events that could lead to a mass extinction.
A mass extinction is an abrupt decrease in life on earth due some catastrophic event.
- The collision of a large bolide on the surface of the earth is a catastrophe in itself.
- The collision and its aftermath have destructive consequences on life.
- The force of the collision can reverberate in form of vibration throughout the earth.
- It can cause heating of the earth surface.
- Volcanic eruptions can become global phenomenon that upsets the earth balance.
Learn more:
Extinction brainly.com/question/10860460
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The correct answer is D. Have scaly skin hardened by keratin
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Independent variable represent the variable
