Answer:
The Milky Way is much wider than it's thickness. So it is a narrow band with many stars in it, while the sky outside the band has much fewer stars.
Shapley's 20th-century observations of globular cluster orbits, which center on a point about 30,000 light years from our Sun, showed we weren’t in the center of the galaxy.
Explanation:
- The structure of our galaxy is formed by the six paths as the nucleus, the central bulge a disk, has spherical arms ad spherical components and surrounded by a huge and large halo. Being a disk-shaped this galaxy is spiral in nature and denser stars are closer to the galaxy.
- The milky way is located about 30,000 light-years away from the sun and its galactic center is far from the center which is dominated by a supermassive black hole.
It could be A or C because the geography affects economic activity depending on if you are landlocked and on the climate
The answer to your question is 1/3
Answer:
The invasive s p e c i e s tend to diminish the populations of native s p e c i e s because they outcompete them, and also manage to disturb the ecosystem.
Explanation:
The invasive species can or cannot be dangerous for the native biodiversity, but unfortunately, it is the second one that is much more common. The reasons as to why the invasive species tend to threaten the biodiversity are that they often don't have a native predator that will control their numbers, outcompete the native species for resources, and the native species don't have defense mechanisms against them. These factors result in havoc in the ecosystem in a relatively short period, with the potential to totally destroy it and changed it.
There are thousands of examples of invasive species around the world, some much more obvious than others. The Burmese pythons in Florida for example, have started to overtake the a p e x predator niche from the alligators by directly attacking them. On the other side of the world, in Australia, the cats and rabbits have contributed to leading hundreds of native species on the verge of extinction, and if there hasn't been human intervention there is a very high chance that a lot of native species would have been already extinct.