Answer: In all living systems we can always find 4 basic elements: carbon, oxygen, nitrogen and hydrogen. Carbon is the basic building unit contained in living matter. The percentage of carbon in the mass of living matter is 19.4 %. Oxygen and hydrogen are present in almost all organic compounds which create living organisms.
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Answer:
Enzymes are catalysts for chemical reactions in living things. Enzymes, like other catalysts, lower the activation energy and increase the rate of chemical reac- tions. ... This means that enzymes do not change the direction of a reaction— they just change the amount of time needed for equilibrium to be reached.
Explanation:
I believe that hair and limbs are homology because all mammals have hair and similar limb structure. Hair loss and social behavior on the other hand are homolasy because not all mammals have them. Homology is the similar traits due to common ancestry while homoplasy is similar traits for other reasons other than common ancestry.
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1. Disasters increase scarcity and reduce the output of economies.
In simplest terms, inputs are necessary for outputs; fewer inputs means fewer outputs. When a disaster damages or destroys resources – whether labor, capital, or natural resources – total production in the economy must fall.
The production possibilities frontier (PPF) is used by economists to model “production possibilities” – the output possible in an economy making full use of its available resources. The PPF shrinks when disasters reduce the availability of the resources used to make goods and services.
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