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Blababa [14]
3 years ago
5

What does the circulatory system do for your body?

Biology
1 answer:
Katena32 [7]3 years ago
7 0

Answer:

The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.

Explanation:

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Identify the mechanism for isolation described using the drop-down menus.
muminat

The correct answer is option D, Temporal isolation

Temporal isolation is the mechanism which prevents the mating of closely related species living in the same ecosystem. Basically the reproductive barriers prevent these species from interbreeding. Temporal isolation is a prezygotic barrier that causes “time isolation” between the breeding period of two closely related species. The difference in time could be “difference in time of day”, “ difference in season of mating”, “difference in months” and in some cases “ difference in years”.

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3 years ago
Which best describes the first organisms on earth?
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Answer:

D. Simple Prokaryotes

Explanation:

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3 years ago
Ari drew a diagram to show organisms in an ecosystem. What did Ari draw?
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Answer:

food web

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Food web is an interconnection and assimilation of different good chains. Many food chains are interlinked a hence a food web is created. This represents what is eaten by which organism. The diagram that Ari had drawn is a diagram of a food chain. The grass is the primary source of food in the food web. Rabbit, Mouse, and grasshopper are the animals that eat the grass. The grasshopper is eaten by a shrew and a mouse. The rabbit and shrew are then eaten by the fox. A mouse is eaten by a snake and a fox. This is the diagrammatic representation of a food web.

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3 years ago
Which statement is true about nuclear decay
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Answer:

Nuclear decay rates are constant

Explanation:

Spontaneous decay of unstable nuclei is a process of a statistical nature, it is not possible to predict with certainty when an individual radioactive nucleus will decay, nor can the decay process be influenced in any way.

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The unit of measurement for the radioactivity of the material is the becquerel (Bq) and denotes the number of decays in one second (1Bq = 1 decay / 1 second).

5 0
3 years ago
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