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vovikov84 [41]
3 years ago
6

On a summer camping on the coast trip, Maria and her family hunted for sharks teeth. Sharks teeth are fossilized remains of anci

ent sharks that trolled the waters for prey. To their surprise they found other fossil remains, remains that changed as they dug farther from the shore. A sample of the fossils they found are seen here. What do the fossils tell us about the area? A) All life once lived in the oceans. B) The climate changed over the years. C) It was once underwater; now it is not. D) The habitat stayed the same; the animal species changed.
Biology
2 answers:
lord [1]3 years ago
8 0
C - it was once underwater now its not.
oee [108]3 years ago
4 0
<span> C) It was once underwater; now it is not. </span>
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A food web can be formed by more than one food chain, since the webs includes all possible interactions that can occur between individuals of different trophic levels.

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Based on the scheme shown in the image

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This food network is made up of three food chains

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In this case, both the insect and the bird are herbivorous organisms, since they feed of the producer, which is the plant.

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The third order heterotroph is the snake, since it feeds on other animals.  The snake is a carnivore and can be a secondary or more commonly tertiary consumer, so it can be placed in the 3rd or 4th trophic level.

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In this case, the plant, the insect, the bird and the snake are part of more than one food chain.

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The bird can be located in both the second and third trophic level, being a primary consumer —when it feeds on plants— or secondary, when it feeds on insects.

<h3> 8. What are decomposers? From which trophic levels are the organisms that decomposers feed on? </h3>

Decomposers are generally bacteria and fungi, organisms capable of degrading organic matter, thus enriching the soil. Decomposers can feed on any trophic level.

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As the ascent of the pyramid occurs —or at the upper trophic level— the amount of energy available decreases. This is because from one trophic level to another only 10% of the energy can be used. If a plant has 5000 Kcal available, the herbivore that consumes it can only use 500 Kcal.

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