<span>The two main sources that lead to increased genetic variation are:
</span>1. Gamete mutations
2. Recombination.
Gamete mutations:
Gametic mutations are the mutations that occur in germline cells (sperm and egg). Due to this, the mutations are able to be passed on from one generation to another. One of the most famous gametic mutations<span> is hemophilia.
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Recombination:
Genetic recombination is the production of offspring with combinations of traits that differ from those found in either parent.
A plant cell has chloroplasts.
An animal cells doesn't.
Answer:
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A kind of behavior by a person's action is called positive sanction and punishments in an action considered as negative sanction.
<u>Explanation:
</u>
The difference between positive sanction and negative sanction is as follows.
Positive sanction:
- An action that results in a 'particular kind of behavior' is known to be a positive sanction.
Negative sanction:
- An action of punishment or threat of 'punishment is used as a means to enforce conformity' is known to be a negative sanction.
The common point:
- Neither positive nor negative sanction works if people by themselves are not sure whether they should be rewarded or punished for a particular behavior. So, there is no common line between Negative and Positive sanction.
Density-dependent limiting factors cause a population's per capita growth rate to change—typically, to drop—with increasing population density. ... Density-independent factors affect per capita growth rate independent of population density. Examples include natural disasters like forest fires.
