C.
6CO2 + 6H2O + Light -> C6H12O6 + 6O2
Light is needed as energy in order for photosynthesis to occur. Photosynthesis converts carbon dioxide and water into oxygen and glucose.
Answer:
Oxygen levels stay above 15 percent starting 200 million years ago
Explanation:
Atmospheric oxygen levels are related to the evolution on Earth and changes in geochemical cycles that involve climate variations.
The presence of O
2 and evolution of oxygen gave new opportunities to the life on Earth. Oxygen levels in atmosphere have fluctuated between 15% and 35% of atmospheric volume, since the start of the Cambrian period.
So, form the starting 200 million years ago, oxygen level stay above 15 percent and the correct option is "B".
Answer:
If the moon has grown to twice its size, the gravitational force of the Earth on the Moon would be twice as much
Explanation:
The force of gravity between two objects is doubled if the mass of one of the objects is doubled.
If the moon has grown to twice its size, the gravitational force of the Earth on the Moon would be twice as much, since the gravitational force is proportional to the masses of both the Earth and the Moon.
A new species can develop in just a few generations
Answer: Virus
A pathogen is an agent which causes infections and disease oriented symptoms in living organisms like plants, animals, humans and others. Examples of pathogens are bacteria, virus, protozoa and others. Measle is virus, which causes disease characterized by it's own name called as measles. Measles is an airborne disease. It spreads from the infectious person to healthy person through cough, nasal secretions and contact with saliva. The symptoms remain for 10-12 days. Symptoms initiates with fever, than cough, runny nose and inflamed eyes. Small spots develop, later develop into red rashes all over the body. Diarrhea, pneumonia and middle ear infection are also common. Other severe symptoms includes blindness and inflammation of brain. Measle vaccines are highly preventive measure against measles.
