<span>The three groups of amphibians: Frogs, Salamanders, Caecilians are different when they reach adulthood. Frogs have four legs with strong hind legs and no tails. Salamanders have tails and four short, weak legs that cause them to walk instead of jump. Lastly, Cacilians have no legs and are burrowing animals.
Amphibians must live in moist environments because they loose water through their thin skin. They need to be near water to replenish the lost water. Also their skin helps them breathe and they can get oxygen from the water.</span>
Answer:
Explanation:
Invasive species are among the leading threats to native wildlife. Approximately 42 percent of threatened or endangered species are at risk due to invasive species.
Human health and economies are also at risk from invasive species. The impacts of invasive species on our natural ecosystems and economy cost billions of dollars each year. Many of our commercial, agricultural, and recreational activities depend on healthy native ecosystems.
What Makes a Species "Invasive"?
An invasive species can be any kind of living organism—an amphibian (like the cane toad), plant, insect, fish, fungus, bacteria, or even an organism’s seeds or eggs—that is not native to an ecosystem and causes harm. They can harm the environment, the economy, or even human health. Species that grow and reproduce quickly, and spread aggressively, with potential to cause harm, are given the label “invasive.”
An invasive species does not have to come from another country. For example, lake trout are native to the Great Lakes, but are considered to be an invasive species in Yellowstone Lake in Wyoming because they compete with native cutthroat trout for habitat.
Galaxies are classified by their shape.
Once upon a time there was a huge cloud of dust and gas. Soon, the cloud began to collapse and condense, allowing stars to form. Gravity pulled dust and gas together to form individual stars. Ta da that's how it was made, in a simplified version.
The structure of our galaxy contains the nucleus, central bulge, disk, spiral arms, spherical component, and a halo.
A tight cluster is bunched up groups of many old stars. Meanwhile an open cluster contains a few loose group of young stars.
A rock collection. Ok just kidding. Galaxies are a collection of stars and planets held together by gravity.
Spiral- The stars and gas clouds are concentrated in one or more spiral of arms.
Elliptical- This galaxy looks like a stretched out circle. Its stars are dim and old. They don't have swirling arms.
Lens (I think you are referring to barred spiral galaxy)- This galaxy is pretty much similar to a spiral galaxy except it has a central bar- shaped structure of stars. They have a bulge in the nucleus.
Irregular- A galaxy that doesn't have a shape, it's just all over the place. Most of the stars are fairly young. So it is practically like a bunch of ADHD kids in kindergarten.
The most common shape of galaxies are elliptical.
Our galaxy, the milky way, is a spiral galaxy.
estimated 100 billion galaxies in the universe, and about 100 billion stars per galaxy. (wowie)
I think it is the bulge, you might need to send me the video because I am not sure.
The Milky Way got its name by the Romans who originally called it "<span>via lactea" which means the road of milk. Idk what they were thinking I would've named the galaxy Frank or something.
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The Milky Way measures 100,000 light years<span> in diameter.
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Nucleus, central bulge, disk, spiral arms, spherical component, and a halo.
Energy is used up is not likely to take place.
Well that was a long one, just take this advice, don't do vegetables, stay in drugs, and eat your school. Ok thank you.
Answer:
Bar graph or a pie graph
Explanation:
Those types of graphs can be used to compare data
