Oral ingestion or swallowing is the
administration method that takes the longest time for the drug to reach the
brain. When using this method, the drug is swallowed through the mouth, moves to
the stomach and then into the bloodstream before it can be transported to the
brain. This means that it takes longer for a swallowed drug to start functioning
than it does with other methods of administration such as injecting.
The nucleus because it is the brain of the cell, it's what controls it.
The spinal cord is the primary means for transmitting messages between the brain and the rest of the body.
Answer:
In many species, females choose the male they will mate with. For their part, males try to be chosen as mates. They show females that they would be a better mate than the other males. To be chosen as a mate, males may perform courtship behaviors. These are special behaviors that help attract a mate. Male courtship behaviors get the attention of females and show off a male’s traits. These behaviors are often observed as direct competition between males. Different species have different courtship behaviors.
Explanation:
<span>The answer is two. In incomplete dominance, heterozygotes have a trait that is intermediary between dominant and recessive homozygote. Let allele A be dominant and allele a recessive allele. The genotypes and phenotypes are as following: genotype: AA - phenotype: dominant homozygote with red feathers, genotype: Aa - heterozygote with purple feathers, and genotype: aa - recessive homozygote with blue feathers. In the cross of two purple birds (Aa x Aa), we have 1 bird with genotype AA and red feathers, 2 birds with genotype Aa and purple feathers, and 1 bird with genotype aa with blue feathers.</span>
