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lord [1]
3 years ago
7

A substance that enters Earth's cycles and does harm to living things is

Biology
1 answer:
n200080 [17]3 years ago
3 0
The answer is A. Pollutant

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When a tick transfers Lyme disease from a deer to a human, the tick is considered the ________ in the chain of infection
melisa1 [442]

The tick is considered the vector in the chain of infection.

Generally, vector organisms are organisms that are capable of transmitting disease pathogens from infected organisms to uninfected ones either directly or indirectly as a result of their activities.

Ticks are parasites that feed on the blood of vertebrate animals such as deers and humans. When they feed on the blood of animals with certain infections, the pathogens for such infections are sometimes carried in the guts of the parasites and these are transferred to the bloodstream of the next animal that would be their host.

A good example of this is Lyme disease.

More about vectors can be found here: brainly.com/question/12596213?referrer=searchResults

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2 years ago
Explain biodiversity
koban [17]
The variety of all life forms on Earth.
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3 years ago
Most narcotics are:
Aloiza [94]

Answer:

ALL OF THE ABOVE

Explanation:

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What signals your body to breathe out, or exhale. We learning about the respiratory system
Gre4nikov [31]

Answer: Your brain constantly gets signals from your body which detect the amount of oxygen and carbon dioxide in your blood. Your brain will send signals to the muscles involved in breathing and adjust your breathing rate depending on how active you are.

HOPE THIS HELPED HAVE A WONDERFULL DAY!

3 0
2 years ago
What are the differences between flow of matter and energy in an ecosystem? Why?
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The key difference between energy flow and matter cycling is that energy flow shows the energy transmission from one trophic level to next trophic level in food chains while matter cycling shows the flow or cycling of elements through the living and nonliving parts of ecosystems
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