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in less than one hundred year's the Earth's temperature is predicted to be 4 degrees Celsius warmer. The average temperature of earth for the past century was 15 degrees Celsius. How much warmer on average will the planet be by 2100 measured Fahrenheit.

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Keith Leannon
Keith LeannonLv2
6 Nov 2019

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Some adult mammals also have brown fat. Would you expect to find more brown fat tissue and more thermogenin in a hibernating bear or in a physically active bear? Explain your reasoning.

Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used

Options:

hibernation

warmer

more

less

physically active

physical activity

1. One would expect to find more thermogenin in a BLANK because the need for additional heat is clearly more critical during BLANK, when the external temperature is likely to be BLANK and bodily activity much BLANK than in the case of a BLANK bear.

Global Warming: Carbon Dioxide and its Effects on Agriculture Many scientists understand that earth is getting warmer and that the cause could be an intensified greenhouse effect resulting from increased CO2 emissions from industry, vehicles, and the burning of forests. Increased carbon dioxide levels will also affect the nutritional quality of many crop plants by decreasing protein content and increasing weed growth. Global warming could influence agriculture and perhaps even completely melt polar ice, leading to flooding of coastal regions. Over 90% of scientists now agree that global warming is occurring. In response to this potential threat, several European countries, the United States, Australia, and New Zealand have made a commitment to significantly reduce carbon dioxide emissions. However, some countries oppose taking strong actions at this time and the U.S. has only met a relatively small proportion of its commitments. Several reasons are cited. First, some experts think the apparent warming trend may be just a random fluctuation in temperature. Second, if the temperature increase is real, some argue that it has yet to be proven that the cause is increased CO2. However, regardless of the effects on climate change, the carbon fertilization effect of increased CO2 levels is affecting crops each year. Some believe it would be difficult to cut CO2 emissions without sacrificing comfort, convenience, and economic growth. Carbon Dioxide as a Greenhouse Gas: http://www.epa.gov/climatechange/ghgemissions/gases/co2.html Effects of Carbon Fertilization of Crop Plants: http://www.news.ucdavis.edu/search/news_detail.lasso?id=9479 http://news.illinois.edu/news/14/0507CO2_AndrewLeakey.html http://news.heartland.org/newspaper-article/2013/10/29/carbon-dioxide-emissions-stimulating-15-trillion-crop-production Please consider and reply to the questions below: Do you think we should have more evidence that greenhouse warming is real before taking action? Or is it better to play it safe and act now to reduce CO2 emissions? The evidence of carbon fertilization of crop plants is readily available and accepted. Crop plants are producing less seed and less protein. Weed plants are overgrowing crop plants and reducing annual yields. Should we take action now to reduce CO2 emissions in order to prevent the loss of agricultural output and nutritious crops?

Hello, can you help answer these and explain answers to them?

Bogs are areas with acidic soils in which carnivorous plants can often be found preying on insects. If insects are a good source of nitrogen, why don ?t more plants in all other ecosystems adopt carnivorous habits?

A. plants in other habitats obtain nitrogen from bacteria in their root nodules.
B. insects in other habitats do not contain as much nitrogen.
C. insects are more mobile and hard to catch in non-swampy areas.

D. it is more energy efficient to absorb nitrogen from soils that are not deficient of nitrogen

Millions of acres of spruce trees have been killed due an explosive increase in spruce bark beetles in recent years, and scientists suggest global warming as the underlining cause. How could this be related to global warming?

A. longer, warmer seasons have resulted in increased beetle populations.
B. spruce is more susceptible to beetles at high temperatures.
C. global warming is the cause of acid rain, and the trees are being weakened.

D. spruce bark beetles did not attack spruce trees until the Industrial Revolution.

In sustainable farming practices involving crop rotation, should the land be covered at all times with plant material?

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B. No, it should be tilled under to add nutrients to the soil.
C. yes, because this minimizes the breeding of pests in soil

D. yes, this lessens erosion of topsoil.

What is the term for species that have much larger impact on an environment than would be predicted from their biomass?

A. primary species
B. dominant species
C. primary producers
D. keystone species

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