Answer:
The first one, "Human Impact on the Galapogos islands", the solutions it provides wont only help the islands, but help everywhere, and that there are much safer ways
Explanation:
Answer:
Invasive species cause harm to wildlife in many ways. When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. It can breed and spread quickly, taking over an area. Native wildlife may not have evolved defenses against the invader, or they may not be able to compete with a species that has no predators.
The direct threats of invasive species include preying on native species, outcompeting native species for food or other resources, causing or carrying disease, and preventing native species from reproducing or killing a native species' young.
There are indirect threats of invasive species as well. Invasive species can change the food web in an ecosystem by destroying or replacing native food sources. The invasive species may provide little to no food value for wildlife. Invasive species can also alter the abundance or diversity of species that are important habitat for native wildlife. Aggressive plant species like kudzu can quickly replace a diverse ecosystem with a monoculture of just kudzu. Additionally, some invasive species are capable of changing the conditions in an ecosystem, such as changing soil chemistry or the intensity of wildfires.
Here are some examples:
- Cogongrass is an Asian plant that arrived in the United States as seeds in packing material. It is now spreading through the Southeast, displacing native plants. It provides no food value for native wildlife and increases the threat of wildfire as it burns hotter and faster than native grasses.
- Feral pigs will eat almost anything, including native birds. They compete with native wildlife for food sources such as acorns. Feral pigs spread diseases, such as brucellosis, to people and livestock. E. coli from their feces was implicated in the E. coli contamination of baby spinach in 2006.
- European green crabs found their way into the San Francisco Bay area in 1989. They outcompete native species for food and habitat and eat huge quantities of native shellfish, threatening commercial fisheries.
hope this helps!!:)
Explanation:
Answer:
The correct answer is option d. "x-rays".
Explanation:
The devastating gravitational force that a black hole has against matter produces that matter rises its temperature to million degrees. As a consequence of the extreme heat that it experiences, matter glows x-rays before being engulfed by a black hole. Since no light can escape black holes, scientists can spot their presence by studying its surrounding environments including the presence of immense gravitational forces and x-rays emissions.
Answer:
The mass of an object is never zero. You measure mass with an ordinary balance on Earth or an inertial balance in space. Weight depends on the effect of gravity, so it can change depending on where it's measured. In the absence of gravity, weight can be zero.
Explanation:
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