I think this relationship is <span>Commensalism because one of them benefit(the bird) and one is not benefited or harmed(the cow).</span><span />
Answer:
Coelenterates are the first invertebrates to develop a true nervous system.
Explanation:
Explanation:
Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.
Answer:
d. transcription factors
Explanation:
Transcription factors are the proteins present in cells that are involved in the regulation of gene expression. The transcription factors may increase or decrease the expression of a gene. Therefore, a transcription factor may serve as an activator or repressor for a gene. These proteins bind to a regulatory sequence present near or within a gene, interact with RNA polymerase or other transcription factors and thereby, affect the transcription initiation.
Since binding of dioxin to certain proteins alter the pattern of gene expression in the cells, these proteins are the transcription factors. For instance, dioxin may bind to a transcription factor and up-regulate the expression of genes which in turn regulate the cell division.
The indentation on the medial surface of each lung through which
pulmonary and systemic blood vessels, bronchi, lymphatic vessels, and
nerves enter and
leave is called the hilum
