How does a lysosome recycle materials in a cell? it stores large molecules for later use. it digests cell membranes that are in the way. it sends excess materials out of the cell. it breaks down large molecules into usable parts.

Dr. bob hypothesizes that drug x causes cuts to heal more quickly. he performs a medical experiment on a group of 100 people and confirms his original hypothesis. in the control group, a 1 cm cut took seven days to heal. in the experimental group, a 1 cm cut took four days to heal. what should dr. bob do next? a) repeat the experiment for accuracy. b) begin selling drug x to the public. c) write a scientific theory about drug x. d) publish the results of the experiment in a scientific journal.

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Give the biological term for: structures that display characteristics of living organisms only within living cells