The population size of a predator species is directly controlled by the population size of it's prey. If the predator has no prey the population size will go down because they have no food.
Answer:
As far as I remember, the answer should be: Elliptical galaxies have no spiral arms.
Explanation:
Hope am right and hope this helps
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Bacteria decomposes other things.
Answer:

Wildlife crossings may include: underpass tunnels or wildlife tunnels, viaducts, and overpasses or green bridges (mainly for large or herd-type animals); amphibian tunnels; fish ladders; Canopy bridge (especially for monkeys and squirrels), tunnels and culverts (for small mammals such as otters, hedgehogs, and badgers.
This know as bridge animals
eg: canopy bridge
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Animalia are heterotrophs while plantae are autotrophs
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