I believe the biosphere is fragile, because over time all of the pollution us humans have made; If its from air pulloution, acid rain or even water pollution. the toxic acids over time have made the biosphere and the ozon layer weaker and more thin. which causes the biosphere to become weaker.
Hi!
The answer is <span>D. Epinephrine widens the air passageways in the lungs.
Hope this helps!
-Payshence xoxo
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Answer: Advantages: These locations are used to preserve different forms of plants and animals, both aquatic and non aquatic for a long time and to keep endangered species from going extinct.
Disadvantages: The proper facilities that would be needed for storing these animals could be very expensive. In other words, it requires alot of money. Secondly, animals and plants need to be properly tended to and this can be very time consuming.
Explanation:
This figure illustrates 3 hypotheses of how a cancer stem cell may arise: (1) A stem cell undergoes a mutation, (2) A progenitor cell undergoes two or more mutations, or (3) A fully differentiated cell undergoes several mutations that drive it back to a stem-like state.
The given blank can be filled with enzymatic molecules.
Enzymes refer to biological molecules or proteins, which function as catalysts and assist the composite reactions to take place everywhere in life. The enzymes generally end with the suffix - ase. For example, proteases, which functions to dissociate the peptide bonds between the amino acids.
Enzymes are big molecules, which accelerate the rate of chemical reactions within the cells, and like all other kinds of proteins, they comprise lengthy chains of amino acids.
