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77julia77 [94]
3 years ago
14

What is a word that means something made up of water land and atmosphere

Biology
1 answer:
vekshin13 years ago
8 0
Its called the biosphere
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Describe 1 attribute of a polar climate
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Answer:

long cold winters, with annual temperatures mostly below freezing.

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¿Qué moléculas conforman las cadenas de nucleótidos?
yaroslaw [1]

Answer:

English:

RNA and DNA are polymers made up of long chains of nucleotides . A nucleotide is made up of a sugar molecule (ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen base. The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T).

Spanish:

El ARN y el ADN son polímeros formados por largas cadenas de nucleótidos. Un nucleótido está formado por una molécula de azúcar (ribosa en el ARN o desoxirribosa en el ADN) unido a un grupo fosfato y una base nitrogenada. Las bases utilizadas en el ADN son la adenina (A), citosina (C), guanina (G) y timina (T).

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African cichlids are a group of closely related fish species. There are at least 500 known species living in three small lakes.
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Which of the following is not a part of environmental science?
zalisa [80]
The answer is letter D.) the components of a cell

Environmental science is an interdisciplinary field that studies the interactions of the environment. The component of a cell can be studied through the lens of biology and may not require addition disciplines.

<span>Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more</span>


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3 years ago
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What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? hints?
Licemer1 [7]

Simple diffusion is the process by which a substance moves across a cell membrane from an area of high concentration to an area of low concentration. Substances that move by simple diffusion are able to diffuse directly across the phospholipid bilayer of the cell membrane. These substances are generally small and neutral, as large or charged particles cannot cross the phospholipid bilayer. Some examples of molecules that move by simple diffusion are carbon dioxide and oxygen.  

Facilitated diffusion is the process by which a substance moves across a cell membrane from an area of high concentration to an area of low concentration with the aid of a membrane protein. Substances that move by facilitated diffusion are not able to diffuse directly across the phospholipid bilayer of the cell membrane. These substances are generally large and/or charged. They therefore travel through a protein channel in the cell membrane along their concentration gradient. Some examples of substances that can move by facilitated diffusion are glucose, sodium ions and chloride ions.  

The similarities between facilitated diffusion and simple diffusion are:  

They both involve the movement of a substance across a cell membrane along its concentration gradient (from an area of high concentration to an area of low concentration).  

They are both examples of passive transport, as neither requires energy from the cell to move the substance across the membrane.

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