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Lostsunrise [7]
3 years ago
8

Describe what the layers of the earth are made of and their approximate temperature.

Biology
1 answer:
Pavlova-9 [17]3 years ago
4 0

Crust- topmost layer, made out of solid silicate rocks like basalt and granite, 200 C to 400 C

Mantle- composed of rocky oxides and silicates 500 C to 900 C

Core- mostly iron, or other metals 6,000 C

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marshall27 [118]

Answer:

You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. The skin, nails and hair form the integumentary system, which stops dirt and pathogens from entering the body.

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2 years ago
You experimentally change the DNA sequence directly upstream of a start codon of an operon in E coli to investigate the function
Phoenix [80]

Answer:

Mutation occurred in ribosome binding site that serves as binding site for 30S ribosomal subunit of <em>E. coli</em> and allows the process of protein synthesis to begin.

Explanation:

The initiation of protein synthesis in bacteria requires binding of the ribosome to the ribosome binding site. The ribosome binding site in bacteria consists of the initiation codon "AUG" and the preceding Shine-Dalgarno sequence. The AUG initiation codon and Shine Delgrano sequence are around 10 bases apart.

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8 0
3 years ago
The purines are:
Alina [70]

Explanation:

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4 0
3 years ago
Read 2 more answers
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</span>

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