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Elenna [48]
3 years ago
5

Explain how oral contraceptives work to prevent pregnancy

Biology
1 answer:
dezoksy [38]3 years ago
5 0
They give off hormones in which prevent obvulation. 
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Plant cells don't have mitochondria in their cytoplasm because of the presence of chloroplasts that convert light energy into ch
elena-s [515]

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true brainliest pls

Explanation:

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3 years ago
Water is a living thing<br>a true<br>b . false<br>c.none<br>d.odd​
Anuta_ua [19.1K]

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b

Explanation:

because it's doesn't breathe or mover

7 0
3 years ago
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What causes the dangerous red tides in the ocean?
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<span>Red tides are formed by dinofllagelata, eucaryotic flagellate organisms. Dinoflagellates are marine plankton which means they drift on the surface of the sea. Those are small, nonmobile organisms who sometimes bloom in concentrations of more than a million cells per ml. The bloom is often red colour so the phenomenon is called red tides. </span>Under such circumstances, they can produce toxins, dinotoxins<span> which are capable of killing fish, so that's why this occurrence is dangerous.</span>

4 0
3 years ago
The cell is going through which sub phase of interphase?
ikadub [295]
The cell is going through B. Anaphase
5 0
4 years ago
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In the nitrogen cycle, different forms of nitrogen move through all of Earth’s subsystems. Which step in the nitrogen cycle show
arsen [322]

Answer:

B, that is, nitrogen-fixing bacteria in the soil convert nitrogen from the air to make nitrates.  

Explanation:

As we know, Nitrogen cycle hold alot of importance in earth's geology because it moves the Nitrogen from soil to the atmosphere and then back to the biosphere fulfilling the Nitrogen needs of animals as well as plants.

Just like all other biogeochemical cycles,  there are different stages of Nitrogen cycle through which an interchange of nitrogen between different reservoirs occur.

The Nitrogen present in the atmosphere is not usable for the animals and plants. However, there are some bacteria present in the soil called nitrogen-fixing bacteria that convert the atmospheric nitrogen to a usable form called nitrates. Plants are able to use these Nitrates and fulfill their nitrogen demands as nitrogen is the main component of the chlorophyll - molecule that makes photosynthesis possible.

Therefore B is the appropriate option.

Hope it help!

4 0
3 years ago
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