here are a few questions i'm stuck on:
4. Humans affect the carbon cycle by
a. burning fossil fuels
b. burning wood
c. driving vehicles
d. all of the above
D?
10. Which of the following is an example of ecological succession?
a. a planted shrub growing on a patio
b. mosses covering the floor of an old building
c. a tomato plant planted in a garden
d. none of the above
i have no idea. this is what my book says about ecological succession:
'ecological succession=a gradual process of change and replacement of the types of species in a community. in nature, the process of ecological succession may take hundreds or thousands of years. Each new community that arises often makes it harder for the previous community to survive. For example, the younger beech trees will have a hard time competing with the older beech trees for sun. However, if a shade-loving species of tree began to grow in the forest, the new species might replace the smaller breech trees.'
51. Artificial selection helps to protect an endangered species by controlling the animal's reproduction and protecting the species from predators.
True or false
true.
that's all. :)
Your first answer is correct.
Read the part of your book that you posted here. The answer is obvious.
Check this site for your third answer.
http://en.wikipedia.org/wiki/Artificial_selection
so 4 is D
10 is...C?
and
51 is true
4 is D.
10. is not C. Ecological succession describes natural, not man-made events.
I don't think the last one is true. Does artificial selection protect the species from predation?
4. Humans affect the carbon cycle by burning fossil fuels, burning wood, and driving vehicles. To answer this question, you need to understand what the carbon cycle is and how humans contribute to it. The carbon cycle refers to the circulation and exchange of carbon atoms between different parts of the Earth's biosphere, atmosphere, and hydrosphere. Humans release large amounts of carbon dioxide into the atmosphere by burning fossil fuels, such as coal, oil, and natural gas, for energy. This contributes to the increase in greenhouse gases and affects the balance of the carbon cycle. Humans also contribute to the carbon cycle by burning wood, which releases carbon dioxide into the atmosphere when the wood is combusted. Additionally, driving vehicles produces carbon dioxide emissions, contributing to the carbon cycle. Therefore, the correct answer to this question is option d: all of the above.
10. Ecological succession refers to the gradual process of change and replacement of species in a community over time. Based on the information provided in your book, none of the options listed seem to fully align with the concept of ecological succession. A planted shrub growing on a patio does not represent the natural process of species replacement in a community. Mosses covering the floor of an old building may indicate some level of succession, but it is limited to the building environment rather than a larger ecological community. Similarly, a tomato plant planted in a garden is a result of intentional human intervention rather than a natural ecological succession process. Therefore, the correct answer would be option d: none of the above.
51. Artificial selection, also known as selective breeding, involves humans intentionally selecting certain traits for reproduction in order to create a desired outcome in a species. This process is commonly used in agriculture and in the breeding of domestic animals. While it doesn't directly address the aspect of protecting endangered species from predators, it could indirectly contribute to their protection by promoting reproductive success and increasing their numbers. Therefore, the statement is true.