Answer: a). AA
Explanation: Every trait is controlled by at least a pair of gene. Genes have different forms known as alleles. Alleles can be dominant or recessive. A dominant allele expresses itself in the presence of a recessive allele and masks the effect of a recessive allele. A recessive allele cannot express itself in the presence of a dominant allele and it's effect is masked by a dominant allele. Dominant alleles are usually written in upper cases such as A, T, while recessive alleles are usually written in lower cases such as a, t. The two alleles that determines a trait is called a genotype. A genotype can be homozygous if the two alleles are identical such as in AA or aa
and can be heterozygous if the two alleles are not identical such as in Aa, Tt.
Lithosphere is the correct answer
cause hydrosphere is water
and stratosphere and atmosphere are part of the air
RNA viruses can copy themselves which is harder for scientists to give an accurate conclusion to solve them.
The treatment of serious psychological disorders with prescribed medications or medical procedures that directly influence the nervous system is called <u>biomedical therapy.
</u>It is a type of therapy where medicine is used to influence physiological issues in the body, so as to treat the psychological problems of the brain. There are various ways to do this, but the most "popular" ones are drug therapies, electroconvulsive (shock) treatment, as well as psychosurgery. <u>
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A repeated series of independent experiments where there is only two possible outcomes (Normally called "Success" or "Failure")
Examples: When you flip a coin. Out comes: head or tails
Hope it helped :) Sorry if it was to late
