Cancer cells spread to other parts of the body by entering the bloodstream. Which of the following organs could prevent a cancer cell in the bloodstream from spreading, and why? The spleen, because it releases lymphocytes into the blood
The Peyer's patches, because they release lymphocytes into the blood
The lymph nodes, because they release lymph into the blood
The thymus, because it releases lymph into the blood

a bird that nests only in a particular tree species.

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.

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