Answer:
1: Burning of fossil fuel
2: Deforestation
3: Waste disposal in landfills
Explanation:
Burning of fossil fuel is the one of the primary cause of increased level of carbon dioxide in air. Deforestation refers to uncontrolled cutting down of trees which in turn increases the level of carbon dioxide in air. Plants are the natural resources that remove the carbon dioxide from air through the process of photosynthesis. Waste disposals in landfills emits methane which is one of the greenhouse gas.
Answer: Base pairs occur when nitrogenous bases make hydrogen bonds with each other.
Explanation: Each base has a specific partner: guanine with cytosine, adenine with thymine (in DNA), The hydrogen bonds are weak allowing it to "unzip"
Answer:
They occur when the Sun reaches its highest or lowest point in the sky.
Energy, the many types of Biomass. There are three levels, primary consumers, secondary consumers, and tertiary consumers. Lower level animals have a greater species biomass its because higher level consumers are limited by there number of biomass.
Answer:
- Heart
Step by step explanation:
