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Komok [63]
2 years ago
6

What special cells and tissue do flatworms have in their excretory and nervous system​

Biology
1 answer:
Alina [70]2 years ago
8 0

Answer:Phylum Platyhelminthes

Explanation:

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Which microscope did Anton van Leeuwenhoek use to observe single-celled organisms?
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<span>Anton van Leeuwenhoek learned to grind lenses ( 1668) and develop simple microscopes.

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Leeuwenhoek heated the middle of a small soda glass rod , over a flame. On pulling apart the two ends, the glass rod elongated into thin whiskers . 
Heating the end of this whisker resulted in a tiny high quality glass sphere. These glass spheres then became the lens of his microscope, with the smallest sphere providing the greatest magnification.

Leeuwenhoek's designs were very basic. The body of the microscope was a single lens mounted in a tiny hole on a brass plate. The specimen was then mounted on a sharp point that sticks up in front of the lens. It's position and focus could be adjusted by turning the two screws.

The entire instrument was about 3 to 4 inches long and had to be held up close to the eye, requiring good lighting and great patience to use.


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When computer mapmakers digitize map data, they __________.
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Which activity is most likely a result of a sudden, unexpected change in the environment? A. Polar bears growing thicker fur B.
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<span> B. Fewer plankton making oxygen</span>
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The diagram shows the thermohaline circulation, also know as the ocean's conveyor belt.
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Answer:

The statement that is true about red currents in the thermohaline circulation is that  water in the red currents contain less salt (option A).

Explanation:

Thermohaline circulation is a concept used in oceanography, referring to the oceanic circulation that depends on factors such as surface heat and salinity, as well as the density gradient that they determine.

On a map, the different currents that are part of the thermohaline circulation are usually represented with blue and red lines, where:

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Thermohaline circulation brainly.com/question/8369487

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