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EleoNora [17]
2 years ago
8

For forensics:What are the 4 main types of sand? How are they different?​

Biology
1 answer:
soldier1979 [14.2K]2 years ago
8 0

Answer:

molding sand, washed sand, beach sand, mason sand, and silica sand

Explanation:

they all have different features and are better for certain things, for example some of silica sands features are

Molecular Weight: 60.084 g/mol

Exact Mass: 59.966756 g/mol

Boiling Point: 4046°F at 760 mm Hg

Melting Point: 3110°F

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The antibiotic rifampicin blocks transcription in many bacteria. In the presence of the antibiotic, adding sigma factor has no s
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Answer:

transcription initiation

Explanation:

Transcription is a process by which genetic information from DNA is used to synthesize an RNA molecule, usually, a messenger RNA (mRNA), which is subsequently utilized to synthesize a protein by a process called translation. Transcription in prokaryotes has three steps:

1-Initiation: the RNA polymerase is a multisubunit enzyme (holoenzyme) composed of two α, one β, one β’ and one ω and σ subunits (α2ββ’ωσ). This holoenzyme binds to the promoter region of the template DNA strand.

2-Elongation. The sigma σ factor of the holoenzyme is released and the complex and the core enzyme (α2 ββω) moves along the template strand, thereby producing an mRNA sequence

3-Termination. This step can be Rho-dependent, where a protein named "Rho" recognizes the termination site and stop transcription, and Rho-independent (transcription continues until the termination sequence is reached).

In consequence, Rifamycin is likely to block the initiation of transcription because the core RNA enzyme needs to bind the sigma factor (σ) for initiation of transcription in bacteria.

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D) 6. In a marine ecosystem, small fish must be able to
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Yes some fishes have long tails that can be a threat which can cause fights.
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Which moon phases are present in this model?
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C waning crescent and waxing crescent
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Henry was studying two populations of the same species of lizards. One population lived on an island and the other lived on the
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How would you explain the “density of the elephant population” to someone?
cricket20 [7]

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The most effective experimental approach to assess the effects of elephant impact on vegetation is to assess plant responses under differences in elephant density. It is important that other factors, such as soils or habitat structure are held constant so that the only factor which varies is elephant density.

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source: Studying Elephants icun.org

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