It is C) Amylase is a catalyst that speeds up the chemical process of breaking down food molecules.
Cnidaria - incomplete digestion [have only a single opening] ,digestion is extracellular and intracellular ,they have stinging casules called cnidoblast which helps for anchorage,defence and capture prey.
echinodermata - complete digestion[mouth on ventral,anus on dorsal],have water vascular system helps in locomotion ,capture of prey,transport of food....digestion is intracellular
The answer is B
Commensalism is when one organism benefits, but the other organism is neither harmed or helped.
I would say that the water vapor condensing to form water droplets would be the odd reaction because the other three are all to do with the reaction of water with metal, between its constituents hydrogen and oxygen and to cause the creation of a gas from the candy.
If it is the fill in the blanks.The answer is The circles,or orbits,for electrons are called energy levels.
