no
Yes all animals with eyes have pupils.
Grasses, like all grazing animals do.
The pupils rectangular shape helps the horse veiw the horizon for possible predators, which is what has kept them alive all this time.
No. Mustangs are feral horses and like all horses are grazing animals (herbivores).
Yes,,All these and others are found there.
There are several species of mongooses, with all studied specimens having horizontal-shaped pupils such as Herpestes auropunctatus, herpestes parvula, and Cynitctis penicillata. This is fairly unique as mongooses are some of the only predatory animals with horizontal pupils.
Yes, definitely. Selective grazing will actually select for less-desirable vegetation, from lower-palatable plants to more weedy species. To mitigate this, selective grazing must be discouraged using managed grazing practices, which will invite a more even amount of rest for all species in that pasture or rangeland area.
All of them! Animals cannot make their own food and rely on plants and other photosynthetic organisms to convert the sun's light energy into a form they can use. Also, there would be no oxygen to breathe.
That all depends on where you live, the yield of the corn crop, and how large of an area you want your animals to graze.
I'm sorry, but I think you messed up your question. And I think you meant 'grazing animals', but whatever. If you did mean grazing and this is the question you meant to say then good. What would happen if the tundra became overpopulated with grazing animals? Well, if that's your question then heres the answer. The tundra doesnt have many plants, so I don't think there would be a huge difference, but some animals would die because of the very few plants the tundra does have being trampled by the grazing animals.
Rectangular is an adjective, not a noun. The answer depends on rectangular WHAT!
All dogs have pupils, there eyes are just extremely dark.