Answer:
A. In a stable ecosystem, life forms have enough food for energy and they are not wasting that energy trying to adapt t their environment. This gives them added opportunities to grow and reproduce. A stable ecosystem can extend its boundaries and interact with an adjoining ecosystem which could benefit both ecosystems.
Explanation:
The correct answer is - A. Glacial erosion forms wide, U-shaped valleys.
The glaciers are essentially large masses of ice, formed either by large mas of snow or a frozen river. Because the ice is expanding, but also the glaciers appear at higher places and slowly move towards lower parts, they contribute to a lot of erosion. The size and their weight, plus their movement and the pressure they make, the glaciers manage to erode lot of material, and by doing so, they reshape the landscape in accordance to their form, which is an elongated, river like, U-shape. Once they are melted, the glaciers leave behind them long and narrow U-shaped valleys, some of which remain as a valleys, while others are filled with sea water and formed the fjords.
Answer:
the answer is A
Explanation:
The answer is letter C. Radon
One of the natural pollutants in ground water system is radon gas. Radon gasses are from the Uranium decay from the Earth’s crust and possibly enter the groundwater system. There is a big possibility that the water that enters our home from the groundwater system can be polluted.
Radon is a source of natural groundwater pollution (option B)
Radon is a naturally occurring radioactive gas that is colorless, odorless, and tasteless. It is formed from the decay of uranium, which is found in all rocks and soils. Radon can seep into homes and buildings through cracks and other openings in the foundation. It can also be found in groundwater.
Radon is a health hazard because it can cause lung cancer. When you breathe in radon, the radioactive particles can get trapped in your lungs. Over time, these particles can damage DNA and lead to cancer.
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B) DNA consists of two strands of nucleotides while RNA has one
C) RNA consists of phosphate group while DNA has nitrogenous group
D) DNA nucleotide comprises deoxyribose sugar while RNA consists of ribose sugar
E) DNA nucleotides contain and adenine-uracil base pairing
F) RNA is more complex than DNA because it has more types
Answer:
A,B,D,
Explanation:
C,E and F are wrong
Answer:
DNA has thymine as a nucleotide, while RNA has uracil.
Explanation:
The DNA nucleotides are adenine, guanine, cytosine, and thymine; the RNA nucleotides are adenine, guanine, cytosine, and uracil.
B: Both are involved in providing energy to the cells.
C: Waste can be removed from the cells of the body.
D: These materials can be cycled through the body.
Answer:
answer C.
Explanation:
waste can be removed from the cells of the body.