USABO 2022 mass deck Questions and Verified Answers | Passed | A+

Mycorrhizae : Symbiotic organisms (aka symbionts) with plants that live on their roots, helping the plant gain nutrients Nerve net : A nervous system that moves neural signals in all directions from the stimuli, found in invertebrates like hydra Malpighian tubules : Tubes in an insect that help with osmoregulation and excretion; they move waste into the main gut for removal. "Kidneys" of arthropods, they absorb ammonium and convert it into uric acid, then into the main gut for removal. Nematocysts : Specialized cells for stinging (like on jellyfish) 2 Contractile Vacuole : A special type of vacuole in a cell which can contract itself for osmoregulation Flame cells : Specialized cells for waste removal (excretion), found in simple organisms like flatworms (specifically planaria) Cambium : One type of meristem tissue, which is inbetween xylem and phloem Divergent evolution : Natural selection happening to only 1 group of a common ancestor species, which makes the group become a different species