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I understand that bears and pigs did that to survive but they changed from a herbivorous diet to a omnivorous diet. But how does a animal go from a plant eater to a pure carnviore. The animal I’m talking about is the marsupial lion. I was watching a documentary on it. And they said the marsupial lion ancestor was a plant eating wombat or kola, to fill the ecological predator niche. First off why did it evolve to be a predator when there where plenty of predators on Austurlia! A terror bird, terrestrial crocodile, giant snake, megalaina and thaylcines. Second why in the word is it name the marsipual lion and it dosent look like a lion! A lion has a man. While this animal has bolt cutter teeth. I don’t understand….. If I had saw the fossil remains of a marsipual lion I wouldn’t think it was a lion, . I probably think it was some mutated animal or alien, the last thing on my mind would be that it is a lion, who discovered this animal obvliousily never seen a real lion before . http://www.travelblog.org/Photos/4134171 does that look like a lion?

Can someone please explain to me what a niche is? And differentiate it with a habitat (not like a huge paragraph just the main point)
So I’m stuck with this here. The Directions are to label the examples below either habitat or niche. (these are the numbers on the paper, I don’t want to get confused)
12. A chameleon changes its colors to blend in with its surroundings.
13. Ducks and amphibians live in or near a pond.
14. Birds nest in trees.
15. A male lion’s mane attracts a mate.
16. Your cat’s sense of smell helps it find its way home.
17. Monarch butterflies eat milkweed, making them poisonous to other species.
18. Woodpeckers use their beaks to pry insects from trees.
Please, somebody help me here!!

Where do you find the greatest number of niches and habitats?
in all ecosystems
an ecosystem with a only a limited number of successional stages
an ecosystem with a only a limited number of successional stages
an ecosystem with no successional stagess
Primary consumers, such as cows and mice, are called
omnivores.
producers.
herbivores.
carnivores.
Carnivores, such as snakes, are called
secondary carnivores.
primary consumers.
producers.
secondary consumers.
A mountain lion, a carnivore, is considered a top or tertiary consumer.
True
False
The first Law of Thermodynamics is related to
the reduced quality of available energy.
the dispersion of pollutants.
the increasing cost of energy and resources.
None of the above are correct.

Dont Understand. Please Help.

They are both apex or tertiary predators (top of the food chain) so in that way they inhabit the same niche in different environments.

Okay, so when I see things about England I always see things about lions. Like the English soccer team’s nickname is the Three Lions.
Just Curious.