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Lyrx [107]
3 years ago
11

A what is a threadlike structure made of dna and protein

Biology
1 answer:
Anna71 [15]3 years ago
3 0
Chromatids......then chromosome !!!
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Both natural processes and human activity are causing some of Earth's permanent bodies of ice to melt. If enough of this ice mel
Nitella [24]

Answer:

The water will get more warm fresh water.

Explanation:

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Select all that apply. If you wanted to fill up on carbohydrates before a long bike ride, which of the following foods would you
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Steak should be it hope you got it!
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after seeing lightning flash you hear the clap of Thunder 5 seconds later how far away is the lightning (speed of sound=340 m/s)
Alecsey [184]

So sound travels 1 kilometer in roughly 3 seconds and 1 mile in roughly 5 seconds. When you see the flash of a lightning bolt, you can start counting seconds and then divide to see how far away the lightning struck.

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2 years ago
Through which microscope were cells first observed?
poizon [28]

Compound microscope

<h3>Further explanation</h3>

In 1665, Robert Hooke used a compound microscope to observe cells. Hooke observes the cell walls of dead plants (in the form of cork) when they appear under a microscope. He named it the cell because it looked similar to a cellula or small room inhabited by monks.

Development of microscopy:

  • 1590: Hans and Zacharias Janssen, as Dutch lens grinders, mounted two lenses in a tube to produce the first compound microscope.
  • 1660: Robert Hooke published <em>Micrographia</em>, containing detailed observations of biological materials made with the best compound microscope.
  • 1676: Anton van Leeuwenhoek was the first person to observe a live cell under a microscope, i.e., the algae Spirogyra.
  • 1931: Ernst Ruska constructed the first electron microscope. With the invention of the electron microscope, many infectious agents smaller than bacteria could be seen.

Until now, we can see how important the use of microscopes, especially in microbiology, that is the study of microorganisms.

<h3>Learn more</h3>
  1. How was the water filtered to remove debris and living organisms?  brainly.com/question/5646770
  2. About the single bonds in fatty acids brainly.com/question/1386856
  3. The theoretical density of platinum which has the FCC crystal structure. brainly.com/question/5048216

Keywords: compound microscope, Robert Hooke, cells first observed, cork, dead plant, walls, Anton van Leeuwenhoek

3 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
2 years ago
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