How does life on earth depend on photosynthesis?

1 answer:

8 0

Humans and many mammals rely on plants to survive. The plants are eaten by insects and insects and small mammals. Insects are eaten by small mammals such as frogs and small mammals are eaten by bigger animal such as a lion. The food chain basically. So if photosynthesis no longer occurs the plants would die out and many mammals would die as well. Cows, pigs and chicken (many of our livestock) rely on plants so our livestock would die out and we would also die

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13. If a stream or river stops flowing due to water scarcity, what disease may result from the stagnant water?

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They are exposed to diseases, such as cholera and typhoid fever, and other water-borne illnesses. Two million people, mostly children, die each year from diarrheal diseases alone.

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user100 [1]

Answer: They have different Genotypes but the same phenotype

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What are bio-fuels considered carbon neutral?

uranmaximum [27]

“The U.S. government considers biodiesel to be carbon-neutral because the plants that are the sources of the feedstocks for making biodiesel, such as soybeans and palm oil trees, absorb carbon dioxide (CO2) as they grow. The absorption of CO2 by these plants offsets the CO2 that forms while making and burning biodiesel.”

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In a water molecule the electrons are not equally shared , creating a ____ molecule .

zalisa [80]

Answer:

Polar

Explanation:

In a water molecule, the oxygen atom is bigger and has a greater pull on the electrons than the hydrogen atoms do. This makes the molecule polar.

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3 years ago

Identify each event as the result of mechanical weathering or chemical weathering.

kow [346]

<h3>The following events are identified as chemical weathering:</h3>

The minerals in a marble statue react with water to form acids and pores in the structure.
The rocks in a region are streaked orange after being exposed to repeated rains.

Reason:

When the weathering process occurs due to chemical reaction, then it is considered as chemical weathering.

In the first case, minerals of marble statue are reacting with water to cause weathering. In the second case, due to the acidificaion reaction, the change of the color has happened after exposure to the repeated rains.

<h3>The following events are identified as Mechanical weathering:</h3>

A piece of rock crumbles after being constantly thrashed by strong waves.

Industrial runoff forms cracks in a rocky structure in its path.

Reason:

When the rock is broken into simple pieces without any chemical reaction it is considered as mechanical weathering.

In the first cause, due to the abrasion caused by the strong waves, weathering has happened, in the second case industrial run off may be of varying temperature and thus may cause heating or cooling of the rock and causes weathering.

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