<span>The correct answer is letter A, disorders in individual genes are responsible for Down's syndrome.
This is a human genetic disorder that is associated with physical growth delays, characteristic facial features, and a mild to moderate intellectual disability. This is a condition in which the genes make a copy of the chromosome 21. </span>
Answer:
ATP is consumed for energy in processes including ion transport, muscle contraction, nerve impulse propagation, substrate phosphorylation, and chemical synthesis. These processes, as well as others, create a high demand for ATP
Explanation:
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Answer:
Explanation:
The cell membrane, also called the plasma membrane, has the following characteristics:-
It is present as the outermost layer in animal cells and lies below the cell wall in plant cells.
The cell membrane surrounds the cytoplasm of living cells, physically separating the intracellular components from the extracellular environment.
The cell membrane is semi-permeable, ie, it allows some substances to pass through it and does not allow others.
It is thin, flexible and a living membrane, which consists of a lipid bilayer with embedded proteins/
The cell membrane has large content of proteins, typically around 50% of membrane volume. These proteins are important for cell because they are responsible for various biological activities.
Answer:
A. Blood is pushed through vessels
Explanation:
Heart muscles contract and relax. The most important effect of this action on the human body is Blood is pushed through vessels.
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<span>Perhaps surprisingly, lakes and rivers constitute a tiny proportion of the world's total freshwater, so answer (b) is correct. Most of the freshwater on our planet is in fact locked up in ice and glaciers, some 68%. The majority of the rest, 30%, is actually underground, in springs and other groundwater feeders. That leaves just 2% that makes up all the rivers, lakes, ponds and other visible freshwater reservoirs that we see in our day-to-day lives.</span>
