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____ [38]
3 years ago
15

What are the substances that skeletons are composed of ?

Biology
2 answers:
Sunny_sXe [5.5K]3 years ago
5 0

Rigid skeletons are formed from materials including chitin (in arthropods), calcium compounds such as calcium carbonate (in stony corals and mollusks) and silicate (for diatoms and radiolarians).

agasfer [191]3 years ago
5 0

Answer:

Rigid skeletons are formed from mostly of collagen, bone is living, growing tissue. Collagen is a protein that provides a soft framework, and calcium phosphate is a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone strong and flexible enough to withstand stress.

Explanation:

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7 0
2 years ago
Explain how fitness and health maintenance result in a longer human life span
guapka [62]
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3 years ago
How can you distinguish between animal and plant cells under the microscope?
IRISSAK [1]

Answer:

the shape

Explanation:

If it’s round it would be animal and if it’s square-like it would be plant cell. Hope this helps!

4 0
2 years ago
RNA is a part of many cellular processes, particularly those associated with protein synthesis: transcription, RNA processing, a
12345 [234]

Answer:

a. transcription/RNA processing : pre-mRNA, snRNA

b. translation : mRNA, rRNA,

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Explanation:

pre-mRNA, mRNA, rRNA, RNA primers, snRNA

a. transcription/RNA processing : pre-mRNA, snRNA

b. translation : mRNA, rRNA,

c. not used in protein synthesis: RNA primers

The pre mRNA the product after transcription from the DNA is processed eg by addition of poly A tail, splicing etc before undergoing the process of translation, the snRNA also help in performing this function. In translation, the mRNA is trnslated to proteiin in the ribosomes which is also made up of rRNA and proteins. RNA primers is not needed in any of these two, only i DNA replication as the DNA polymerase is uable to begin the synthesis of adding nucleotides to a DNA strand.

8 0
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What is the study of life called
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