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AveGali [126]
3 years ago
8

Mixture of gases that forms a layer around Earth

Biology
2 answers:
tiny-mole [99]3 years ago
8 0
The atmosphere is a mixture of gases that surrounds the earth
IRINA_888 [86]3 years ago
8 0
This is the answer, the pic

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Communication and transportation have improved as a result of scientific advancements
Sladkaya [172]

True.  Many innovators and inventors have used new scientific methods to develop and improve communication and transportation devices in many ways.  They were able to either make them faster or more fuel efficient.  They have also given rise to new ways to communicate such as the internet and have developed devices that make it easier for people to come together.

7 0
3 years ago
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use the samples; diamond, dolomite, gneiss, and chalk and provide your analysis of composition and identification based on their
Trava [24]

Answer:

Diamond-

Physical identification characters:

Color-  White or Colorless

Lusture - admantine

Streak - Colorkess

Habit - Hour glass structure

Hardness - 10

Cleavage- octaheadral

Composition- pure carbon

Specific gravity-3.5

Dolomite (CaMg(CO3)2

Color - Colorless or white

Hardness is between 3-4

Reacts with any acid

Gneiss

Light and dark strip or banding present alternatively

biotite , pyroxene have Mafic mineral shows dark banding

Quartz, Feldspar have  Felsic mineral for light banding

High grade metmorphic rock which is formed due to regional metamorphism of lower grade rock

Chalk(CaCO3)

Color-White

Very fragile

Hardness-1

With acid gives effervescence.

4 0
3 years ago
Circulation to and from the lungs is referred to as
horsena [70]

Answer:

pulmonary circulation

Explanation:

The pulmonary circulation moves the blood between the lungs and heart. Since the blood carries oxygen the heart pumps it to every body part including the lungs so we can maintain homeostasis.

8 0
3 years ago
Which cellular structures are found in plant cells but NOT in animal cells?
Anestetic [448]
a. chloroplast and cell wall

The chloroplast contains chlorophyll, which is the stuff that makes plants green. So animals do not have a chloroplast. Only plants have a cell wall and it is what helps plants maintain their shape. Hope this helped! :)
4 0
3 years ago
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Describe the construction of a recombinant plasmid containing the gene for the green fluorescent protein (GFP) and the insertion
valkas [14]

Answer:

-use PCR to amplify the gene for GFP

-perform a restriction digestion of the GFP gene and the plasmid

-ligate together the GFP gene and the plasmid to generate a recombinant plasmid

-transform bacteria with the recombinant plasmid using electroporation

-plate the bacterial cells, and screen for positive transformants

6 0
3 years ago
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