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makkiz [27]
3 years ago
15

The tiny exoskeleton of a diatom is mostly composed of

Biology
1 answer:
BabaBlast [244]3 years ago
5 0

Answer:

calcium carbonate

Explanation:

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Help and Quick!
dalvyx [7]

Answer:

the first one is plants

the second one is animals

the third one is plants

the fourth one is animals

3 0
3 years ago
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Which of the following statements about boiling points is true?
e-lub [12.9K]
The statement about boiling points that is true is the boiling point of a substance is higher than its freezing point.
If something boils, it means it is really hot in there, and if it freezes, it is very cold. 
3 0
3 years ago
Fossil fuels are made by the decay of living things. Because living things are always dying and decaying, why are fossil fuels n
Annette [7]
Because it takes millions of years of pressure under the right conditions for dead creatures to become fossil fuels, and we're running out of the resource faster than it could ever be replenished. 
5 0
3 years ago
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Atmosphere is a mixture of two things
bekas [8.4K]

Answer: yes

Explanation:

It's a mixture of different gases. The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.

8 0
3 years ago
What is the tolerable upper intake level for zinc for adults?
sdas [7]

The tolerable upper intake of zinc for an adult is 40 mg per day.

But the recommended daily intake of Zinc (RDA) is 15 mg per day for an adult. Nevertheless, this contribution must be adapted according to your age and your activity. Attention, in case of excessive excess, zinc can become toxic.

The tolerable dose (without side effects) can be up to 40 mg per day, it is prescribed in case of infection as during cooling. Attention in case of treatment with 40 mg of zinc per day, the maximum duration of treatment is 4 days.

6 0
3 years ago
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