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yanalaym [24]
2 years ago
13

Which statement describes the relationship between the deer and plants on the food web? Tree is consumed by insect, which is con

sumed by the frog and lizard. The frog and lizard is consumed by the snake and the snake is consumed by the hawk. The mayfly is consumed by the fish and the fish is consumed by the bear. The plants are consumed by the deer and bear. The deer is consumed by the wolf.
A. Autotrophs supply food for the heterotrophs.

B. Autotrophs and heterotrophs compete for the same food source.

C. Heterotrophs supply food for the autotrophs.

D. Autotrophs and heterotrophs share the same food source.
Biology
1 answer:
True [87]2 years ago
8 0

Answer: A.  Autotrophs supply food for the heterotrophs.

Explanation: A deer is a heterotroph and a plant is a autotroph. Examples of heterotrophs are animals and humans, and examples of autotrophs would be plants and algae. Therefore, because a deer consumes plants that means that autotrophs supply food for the heterotrophs. And by the way I did the exam myself and got this answer correct!

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What are the two main ways a star can live based on it mass?
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Answer:

Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive.

Stars start their lives as clouds of dust and gas. Gravity draws these clouds together. A small protostar forms, powered by the collapsing material. Protostars often form in densely packed clouds of gas and can be challenging to detect.

"Nature doesn't form stars in isolation," Mark Morris, of the University of California at Los Angeles (UCLS), said in a statement. "It forms them in clusters, out of natal clouds that collapse under their own gravity."

Smaller bodies — with less than 0.08 the sun's mass — cannot reach the stage of nuclear fusion at their core. Instead, they become brown dwarfs, stars that never ignite. But if the body has sufficient mass, the collapsing gas and dust burns hotter, eventually reaching temperatures sufficient to fuse hydrogen into helium. The star turns on and becomes a main sequence star, powered by hydrogen fusion. Fusion produces an outward pressure that balances with the inward pressure caused by gravity, stabilizing the star.

How long a main sequence star lives depends on how massive it is. A higher-mass star may have more material, but it burns through it faster due to higher core temperatures caused by greater gravitational forces. While the sun will spend about 10 billion years on the main sequence, a star 10 times as massive will stick around for only 20 million years. A red dwarf, which is half as massive as the sun, can last 80 to 100 billion years, which is far longer than the universe's age of 13.8 billion years. (This long lifetime is one reason red dwarfs are considered to be good sources for planets hosting life, because they are stable for such a long time.)

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texture

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