Agastrovascular cavity is a digestive tract with two openings-a mouth and an anus. true or false

the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice.

so True

False. I usually use quizlet. so..yeah.

https://quizlet.com/140575487/biology-final-invertebrate-review-flash-cards/

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

answer; both surfaces of the membrane are nonpermeable