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3 years ago

When did the Devonian period start and end?

2 answers:

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The Devonian Period was part of the better known Paleozoic Period. Some scientist think it was 416 million years ago. It was the time of the great fish. It gets its name from when red rocks from Devon, England were also found in North America. It is believed that during this period parts of North America, Europe, Russia and Greenland crashed together making a new land mass. Scientists believe this period ended about 354 million years ago when land plants began to take over and much of what was an ocean disappeared.

nexus9112 [7]3 years ago

4 0

Silurian period to the beginning of the carboniferous period

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Which is an example of the way matter cycles through the bodies of living

olasank [31]

C I think, I mean it’s the only logical answer, hope this helps!

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2 years ago

Chondroblasts ________. Chondroblasts ________. are mature cartilage cells located in spaces called lacunae never lose their abi

Mariulka [41]

Answer:

within the cartilage divide and secrete new matrix

Explanation:

Chondroblasts also called as perichondrial cells form chondrocytes which are the cells of cartilage. They also secrete the cartilage matrix which forms the cartilage. This matrix consists of collagen, fibers, proteoglycans, hyaluronic acid, water and glycoproteins.

They divide within the formed cartilage too to secrete new matrix. They are called chondrocytes when they become a part of cartilage matrix. Here they grow the cartilage matrix by secreting more extracellular matrix rather than dividing. Once the cartilage formation is completed it is composed 10-20% of collagen fibers, 65-80% of water and rest is made by proteoglycan-hyaluronic acid aggregates.

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3 years ago

Sodium Hydroxide + Copper Sulfate

AnnyKZ [126]

<h2>Answer:</h2>

Reaction for observation: Sodium Hydroxide + Copper Sulfate

Full reaction:

2NaOH + CuSO4 --> Cu(OH)2 + Na2SO4

Observations Before Interaction:

Sodium hydroxide is a turbid solution and copper sulfate is in form of bright blue crystals.

Observations After Interaction:

When their solutions are mixed with each other, a pale blue precipitate of basic copper hydroxide & a solution of neutral salt sodium sulphate will be formed.

Was Mass Conserved?

Yes, mass was conserved.

The Law of Conservation of Mass states that "mass cannot be created or destroyed, but changed into different forms".

Hence mass was conserved.

<h3>Part 4.</h3><h3>.Proof of a Chemical Reaction</h3>

The proof of the reaction is the appearance of pale blue precipitates of of basic copper hydroxide & a solution of neutral salt sodium sulphate.

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3 years ago

What are some examples of producers that are classified as phytoplankton?

iVinArrow [24]

Answer:

Some phytoplankton are bacteria, some are protists, and most are single-celled plants. Among the common kinds are cyanobacteria, silica-encased diatoms, dinoflagellates, green algae, and chalk-coated coccolithophores.

Explanation:

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2 years ago

Sometimes, you can look at a baby and say things like, “She has her mother’s eyes and her father’s nose.” Why is this only possi

kenny6666 [7]

Answer:

Because through fertilization, we have the union of half of the paternal and maternal patrimony. In asexual reproduction, on the other hand, the child organisms will be the same as the organism that generated them

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2 years ago

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