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How are we tend to know their totally different feeding preferences? The solution lies in 2 associated differences among the species, in their digestive systems and body sizes. According to their digestive systems, these herbivores can be divided into 2 categories: the non-ruminants (such as the zebra, which has a digestive system like a horse) and also the ruminants (such as the wildebeest, topi, and gazelle, which are like the cow). Non ruminants cannot extract a lot of energy from the hard parts of a plant; however, this is more than made up for by the quick speed at which food passes through their guts. Thus, once there is only a little supply of poor-quality food, the wildebeest, topi, and gazelle enjoy an advantage. They are ruminants and have a special structure (the rumen) in their stomachs,which contains microorganisms which can break down the hard parts of plants. Food passes only slowly through the ruminant’s gut as a result ruminating—digesting the hard parts—takes time. The ruminant frequently regurgitates food from its abdomen back to its mouth to chew it up further (that is what a cow is doing when “chewing cud”). Only when it has been chewed up and digested almost to a liquid can the food pass through the rumen and on through the gut. Larger particles cannot meet up with till they have been chewed down to size. Therefore, once food is in short supply, a ruminant can last longer than a no ruminant as a result of it will derive additional energy out of identical food. The distinction will partially explain the eating habits of the Serengeti herbivores. The zebra chooses areas where there is more little-quality food. It migrates initial to unexploited areas and chomps the abundant low-quality stems before moving on. It is a fast-in/fast-out feeder, hoping on a high output of incompletely digested food. By the time the wildebeests (and other ruminants) arrive, the grazing and sounds of the zebras can have worn the vegetation down. As the ruminants then set to figure, they eat all the way down to the lower, leafier components of the vegetation. All of this fits in with the variations in abdomen contents with that we have a tendency to began. They eat all the way down to the lower, leafier components of the vegetation. All of this fits in with the variations in abdomen contents with that we have a tendency to tend to begin.
Q. Which of the following herbivores has to eat large quantities of plant stems because it gains relatively little energy from each given quantity of this food?
(A) The gazelle
(B) The horse
(C) The zebra
(D) The topi
(E) The wildebeest