Why is it a bad idea to run in lab ?

Which is not true about balanced forces?

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

When can exponential growth happen? a: when there are limited resources b: when carrying capacity is reachedc: when there is no competition d: when the death rate is high