Answer:
Most cells within planarians tend to be very close to their gastrovascular cavity, in addition to their external environments. Also, planarians have the ability for oxygen and carbon dioxide to diffuse through the cells on their body walls: this makes it unnecessary for these varieties of flatworms to need a dedicated bodily system.
I think the deficiency of dedicated respiratory and circulatory systems in Planarians does not cause a problem because none of their cells are far removed from the gastrovascular cavity or from the external environment. Planarians are free-living flatworms and form the class Turbellarians in the Phylum Platyhelminthes. Flatworms have three tissue layers, that is the ectoderm, mesoderm, and endoderm.
hope this helps!!!!!....
Explanation:
Probably if there are not enough plants in that area
The limbic cortex. Another area called the precuneus also plays a role.
It is D because you are inferring the rest are statements the dog barking you can obviously hear it vinegar has a pungent aroma you can smell it. the flower is pink you can see it. but a cup with steam coming from it will be hot to the touch. it says "Will be" which implies that you haven't actually touched it yet. I know which question your talking about.
