It is your job to group these four animals based on like features. First you group the animals by size: very large and not very large. Into the very large group you put the giraffe and elephant. You are left with the lion and alligator. What feature could you use to put these two animals into different groups?

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