The crown-of-thorns sea star, acanthaster planci, preys on the flesh of live coral. if coral animals are attacked by these sea stars, then what actually provides nutrition to the sea star, and which chemical (besides the toxin within their nematocysts) do the corals rely on for protection?
a) medusae; silica
b) polyps; silica
c) exoskeleton; calcium carbonate
d) polyps; calcium carbonate
plants store starch which is a complex carbohydrate. this can be broken down into a simple one known as glucose. they then use glucose for energy.
as an example i will take the balkan lynx and the measures for its protection.
after ww ii, the subspecies of the eurasian lynx, the balkan lynx, was killed extensively. the reasons were that the population was growing quickly so there were much more encounters between the lynxes and the people, but also because the people believed that the lynxes were killing their livestock (mostly the sheep and goats), which turned out to not be true at all.
the balkan lynx reached a point where it was almost totally wiped out, with only around 30 grown individuals left in the 90's, on the territories of macedonia, albania, serbia (in the present kosovo), and montenegro.
all of the organizations from this countries which primary goal is the protection of the animals stood together and made the governments to take urgent measures and to be very strict with them. and so they did. regulations were made where the killing of a lynx means multiple years in prison, the protected areas got more stuff to patrol and watch out, and the people were restricted into going in some areas, yet alone doing something in them.
the numbers of the lynxes is still small, but the population has almost doubled, and last year, three cubs were recorded on the territory of macedonia, so maybe this wild cat has a brighter future.