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Savatey [412]
3 years ago
10

In what ways do humans affect the different trophic levels in ecosystems on Earth?

Biology
2 answers:
Allushta [10]3 years ago
8 0

Answer:

Our results contrast with research conducted in protected areas that suggested human effects in the food web are primarily predator-mediated. Instead, human influence on vegetation may strengthen bottom-up predominance and weaken top-down trophic cascades in ecosystems.

Explanation:

Stella [2.4K]3 years ago
7 0

Answer:

Humans are dominant consumers. They affect food webs through energy production and agriculture, pollution, habitat destruction, overfishing and hunting. Also their demands for food and shelter along with population growth, affecting soil and aquatic ecosystem.

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Answer:

The correct answer is - option B. DNA sequences from different species can be compared, giving us more information about their evolutionary relationships.

Explanation:

The study of the evolution of a species in a longer period of time and its evolutionary relation with other species is phylogeny. DNA is the basis of the molecular phylogeny of a species to find out the evolution of species.

Genetic mutations, a sequence of nucleotides, and other information of DNA helps in the establishment of divergence from common ancestry. By comparing the information it gives an idea about the evolutionary ancestry of two or more species.

8 0
3 years ago
How does wet and dry barometer work?? Thnx
tatiyna

Wet barometer - The tool works by measuring atmospheric pressure to predict incoming weather. Since the glass is only filled halfway with water, the other half is exposed to the atmosphere. When the outdoor atmospheric pressure rises, the pressure in the glass decreases, and causes the water to move down the spout.

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I hope this helps!

6 0
3 years ago
Without genetic variation, the mechanisms of evolutionary change will not occur. There are several sources of genetic variation
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Answer: A, B, and D

Explanation: I just took the test

6 0
3 years ago
PLASE HURRY!!!!
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Answer:

   R    r

R  RR  Rr

r Rr     rr

Explanation:

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3 0
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