Answer: B
Explanation: Transport of pebbles in a stream causes them to collide and rub against one another and the stream bed, and the resulting abrasion produces the familiar smooth and rounded shape of river rocks.
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.
The companies fracture the surrounding earth when drilling for natural gas in order to increase the amount of gas extracted.
<h3>What is fracking?</h3>
Fracking is a drilling technique used to extract natural gas from the earth's surface.
Fracking consists in applying high-pressure water to the rocks to break them and thus obtain natural gas.
In conclusion, the companies fracture the surrounding earth when drilling for natural gas in order to increase the amount of gas extracted.
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The genotypes are one BB, two Bb, and one bb and the phenotype is three black and one yellow wing butterfly.
<h3>What are the genotype and phenotypes of the offspring?</h3>
The genotype and phenotypes of the offspring are determined using a Punnett square as follows:
Let B be black wing and b be yellow wings.
The cross between two heterozygous butterflies is:
Black is dominant over yellow wings.
Therefore, the genotypes are one BB, two Bb, and one bb and the phenotype is three black and one yellow wing butterfly.
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Answer:
To provide nutrients, maintain temperature and remove wastes.
Explanation:
The adequate hydration is important because body constitute water in major amount. The water present in outside and inside environment of muscle cells is responsible for providing nutrients. This water also helps in removal of waste material from the cell. Thus, the body must be hydrated well to remove waste, maintain temperature and provide nutrients.
