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Anastasy [175]
3 years ago
9

In what trophic level do most humans belong? And why?

Biology
1 answer:
klio [65]3 years ago
8 0

Answer:

Not all humans belong to the same trophic level. This is due to the dietary choices each human makes.Next come the omnivores that eat a mixture of plants and herbivores. That's where humans rank, with a trophic level of 2.2.

Explanation:

Many humans are omnivores, meaning they consume both plant and animal material. Thus, they may be on the third or even fourth trophic level. For example, if you consume beef (cows are herbivores), you are a part of the third trophic level. If you were to eat salmon though, salmon consume other fish, and this would mean you are a tertiary consumer on the fourth trophic level.

Vegans and vegetarians who do not consume fish or meat of any kind are primary consumers. They belong on the second trophic level.

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0.153

Explanation:

We know the up-thrust on the fish, U = weight of water displaced = weight of fish + weight of air in air sacs.

So ρVg = ρ'V'g + ρ'V"g where ρ = density of water = 1 g/cm³, V = volume of water displaced, g = acceleration due to gravity, ρ'= density of fish = 1.18 g/cm³, V' = initial volume of fish, ρ"= density of air = 0.0012 g/cm³ and V" = volume of expanded air sac.

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(ρ - ρ")V'  = (ρ' - ρ)V"

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V/V" = 5.55 + 1

V/V" = 6.55

V"/V = 1/6.55

V"/V = 0.153

So, the fish must inflate its air sacs to 0.153 of its expanded body volume

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