Cacti and other succulents can adapt to dry climates. They are able to store water in their leaves, while others store water in the roots or trunks. The waxy cuticle helps prevent water loss.
Remember that a biotic factor is a living component in an ecosystem that affects the population of another organism. So that means that the answer is B.
Answer:
The correct answer is "The emergence of a larger middle class in the North".
Explanation:
The missing options of this question are:
A) The emergence of a larger middle class in the North
B) A decline in economic inequality in urban areas
C) An increased demand for agricultural workers in the Midwest
D) The improvement of working conditions in factories
The correct answer is "The emergence of a larger middle class in the North"
The period of 1800 to 1848 is characterized by being of economical growth due to the rise in manufacturing technology. Result of this economical growth, many families improve their economical conditions and by 1848 a larger middle class emerged in the North. However, eventually a laboring poor population started to growth as well.
This has happened before in Yellow Stone National Park in CA. Removing a species form the Pyramid causes the ecosystem to collapse, as species become over hunted and others are starved. One type of organism could become overpopulated, therefor lack of natural variation.
Endocrine. Because insulin is a hormone that are produced in the endocrine gland such as pancreatic gland
