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vovangra [49]
3 years ago
13

How many hours of sleep do you really need?

Biology
1 answer:
otez555 [7]3 years ago
3 0
According to the National Heart, Lung, and Blood Institute, adults need around seven to eight hours. For teenagers they recommend nine to ten, and at least ten for children.
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A Paramecium has an internal sucrose concentration of 0.040 M, a glucose concentration of 0.035 M, and a fructose concentration
Nadusha1986 [10]

Answer:

<u>c. Sucrose and glucose</u>

Explanation:

The paramecium is a large, single-celled microbes, surrounded by a plasma membrane. Simple diffusion occurs in cells across plasma membranes, as a form of passive transport. In diffusion, solutes move from regions of high concentration to regions of low concentration across the plasma membrane.

Here, the internal environment has higher concentrations of sucrose and glucose, but lower concentrations of fructose, thus the solutes will move along their concentration gradient, to where the concentrations are lower. In order for the fructose molecules to move out of the cell, the molecules have to move against their concentration gradient - a process requiring energy known as active transport.  

6 0
3 years ago
Which is the most comprehensive ecological unit of the biosphere?
Leni [432]

Biomes

Explanation:

The most comprehensive ecological unit of the biosphere is the biomes.

Biomes are the largest ecological unit of life.

  • They are made up of different population, communities, ecosystems of living organisms and their environment.
  • A biome is an ecosystem made up of common characteristics in the environment they are found.
  • They have internal regularities in the nature and types of fauna and flora found in such areas.
  • Examples of biomes are tundra, rainforest, desert etc

learn more:

Rainforests brainly.com/question/3995505

#learnwithBrainly

3 0
3 years ago
Explain how he interaction between mRNA codons and tRNA codons anticodons codes for a specific amino acid
Julli [10]
<span>The interactions between the mRNA codons and the tRNA anticodons  codes for a specific amino acid is by, it is the job of the tRNA to start working after the mRNA has able to have its own complementary copy. The mRNA will undergo to the nucleus and will move out, in order to go the rrna. The three nucleotides codes the specific amino acid of the trna. The trna and the mrna will be matched, it will now release the amino acid in the trna that wil form a peptide bond. When the mrna is able to be decoded to form an amino acid, it will now have the ability to break and make proteins in different structures.</span>
5 0
3 years ago
In animal cells, cell junctions called ______ junctions form barriers between cells that prevent leaking of fluids and water-sol
Lemur [1.5K]
Animal cells communicate via their extracellular matrices and are connected to each other via tight junctions, desmosomes, and gap junctions
6 0
2 years ago
One similarity between a eukaryotic cell and a prokaryotic cell is the presence of
Vladimir79 [104]

Explanation:

Both prokaryotic and eukaryotic cells have:

DNA.

Ribosomes.

Cytoplasm.

Plasma membrane.

4 0
3 years ago
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