Francesco Redi, he put meat in jars and waited.
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.
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C. Enzymes increase the rate of the chemical reactions carried out during metabolism.
The most important factor is concentration of CO2 and green house gases ! they are responsible for the greenhouse effect over the globe !
Answer:
Premenstrual syndrome
A group of symptoms that occur in women, typically between ovulation and a period.
Very common
More than 3 million US cases per year
Usually self-treatable
Usually self-diagnosable
Lab tests or imaging not required
The cause isn't fully understood but likely involves changes in hormones during the menstrual cycle.
Symptoms include mood swings, tender breasts, food cravings, fatigue, irritability, and depression.
Lifestyle changes and medications may reduce symptoms.
Explanation:
