Genetic variation<span> is essential for </span>natural selection<span> because </span>natural selection can only increase or decrease frequency of alleles that already exist in the population.Genetic variation<span> is caused by: mutation
i pulled this off of the site i got the information from i hope this helps you out if not sorry
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<span>All are mutagenic because they cause base substitutions, deaminating agents oxidatively deaminate bases so cytosine converted to uracil and adenine converted to hypoxanthine, uracil pairs with adenine and hypoxanthine pairs with cytosine, alkylating agents donate alkyl group to amino or keto groups altering base pair affinities</span>
Answer:
Yellow
Explanation:
Yellow carrots: highest in lutein, may also contain zeaxanthin.This is the result of certain carotenoid pigments present in the root.
Anxiety and guilt
<span>Ritualistic behavior seen in this disorder is aimed at controlling feelings of anxiety and guilt by maintaining an absolute set pattern of action. Although the person with an obsessive-compulsive disorder may be angry and hostile, the feelings of anger and hostility do not precipitate the rituals. Although the person with an obsessive-compulsive disorder may be embarrassed and ashamed by the ritual or feel hopeless and powerless to the ritual, the basic feelings precipitating the rituals are usually anxiety and guilt.</span>
