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Mashcka [7]
3 years ago
14

At the lowest biological level, groups of cells that have a similar structure and function work together as

Biology
1 answer:
tresset_1 [31]3 years ago
7 0

Answer:

TISSUES

Explanation:

Each cell type has a special feature that enables it to perform a particular function efficiently. These cells are said to be specialized to perform specific functions. Groups of specialized cells are assembled together to form a tissue. Examples are muscle, skeletal and nervous tissues in animals as well as phloem, epidermis and xylem tissues in plants.

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The appearance of banded iron layers in the rock record between 1.08 and 3.8 billion years ago reflect the alteration of oxygen-
lyudmila [28]

The appearance of banded iron layers in the rock record between 1.08 and 3.8 billion years ago reflect the alteration of oxygen-rich and oxygen-poor conditions in the ocean at that time is True.

<u>Explanation:</u>

Banded rocks have layers of iron oxide and cherts that contain silica. The layer containing iron oxide has a dark color and the chert layer is red in color. Haematite and magnetite are usually the iron oxides that make up the banded rocks.

Banded rocks were formed by the reaction of iron in the oceans with the oxygen produces by photosynthetic bacteria in the ocean. The reaction caused the formation of iron oxides and their precipitation as Banded iron formations.

The presence of free oxygen is crucial for the formation of banded rocks and the formation reduced drastically after 1800 mya period when  atmospheric oxygen availability was reduced.  Banded rocks represent the oxygen rich and oxygen-poor condition of the ocean at that time.

5 0
3 years ago
How is mitochondrial DNA (mtDNA) typing used in forensic science?
Rudiy27

Explanation:

<em>Mitochondrial DNA typing</em><em> </em><em>-</em>

This method is mainly used by forensic scientist who investigate crime scenes.

It involves the use of DNA from an unknown sample to match a DNA collected from a crime scene.

This method is normally used in special scenarios.

These scenarios include:

1) When the DNA is discarded.

2) When the sample does not contain nuclear DNA.

From the description above we can now answer the question as follows:

an unknown nuclear mtDNA is matched to a nuclear mtDNA found at a crime scene.

3 0
3 years ago
Why was the blood bright red, rather than the color of "coffee grounds"?
sergey [27]
<span>In cases of Esophageal bleeding, The blood can be bright red rather than the color of coffee grounds because it is fresh and did not enter the stomach.</span>
8 0
3 years ago
Oceans, coral reefs, and the coastal zones are types of<br> ecosystems.
8090 [49]

Answer:

Marine ecosystem

Explanation:

6 0
3 years ago
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if you expose a photosynthesizing plant to water that contains both radioactive H and Radioactive 0, in which of the products of
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  <span>Radioactive H will show up in the sugar, C6H12O6, and radioactive oxygen will show up in the O2 emitted to the air.</span>
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3 years ago
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