Which activity is most likely a result of a sudden unexpected change in the environment?

According to the cladogram, which organisms have roundworms as a common ancestor?

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? a. the spleen, because it releases lymphocytes into the blood b. the peyer's patches, because they release lymphocytes into the blood c. the lymph nodes, because they release lymph into the blood d. the thymus, because it releases lymph into the blood

Fill in the gaps with the words that fit