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3 years ago

4. What are carbon dioxide levels now? How often in the past 650,000 years have they been that high?

Biology

1 answer:

fgiga [73]3 years ago

4 0

Answer:

Explanation:

Scientists at the Mauna Loa observatory in Hawaii say that CO2 levels in the atmosphere now stand at 387 parts per million (ppm), up almost 40% since the industrial revolution and the highest for at least the last 650,000 years.

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Is the equation balanced? Why or why not?

diamong [38]

Answer:reaction, or reactants becoming products: A + B →. C + D reactants products ... CaCl2 has two Cl's because Ca is +2 charged so we need two –1 ... Due to the Law of Conservation, the number of atoms (and the mass) of each ... This is a balanced equation – same number of H and O atoms on both sides of the arrow.

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3 years ago

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Anastaziya [24]

Answer:

decomposers are organisms that break down dead matter in an ecosystem.

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2 years ago

What is the land ecosystem dominated by grass?

alexira [117]

For the first question, it's D. And the second question it's C.

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3 years ago

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a bacterium has a faulty lac operon in which there is a structural defect in the operator. in this bacterium:

wariber [46]

A bacterium has a faulty lac operon in which there is a structural defect in the operator. In this bacterium there is a structural problem with a segment of DNA that binds a repressor.

A protein known as a repressor binds to an operator site. The operator in this instance (and numerous others) is a section of DNA that lies just downstream of the RNA polymerase binding site or overlaps with it (promoter). In other words, it lies between the operon's promoter and its genes.

The repressor protein inhibits the synthesis of messenger RNA by attaching to the promoter region of the gene(s) (mRNA). The control of gene expression in cells requires repressor proteins.

Thus, by physically impeding the RNA polymerase's ability to operate, these repressor proteins stop the gene from being transcribed.

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2 years ago

A large forest fire burns in Canada, dropping black carbon on Greenland. Which of the following is true

klemol [59]

In the case of the large forest fire burns in Canada, the option that is known to be true is option B: . The Greenland glaciers will melt faster.

<h3>How do wildfires affect glaciers?</h3>

A new study has shown that the exposure of glaciers to any kinds of wildfire smoke can lead to the glaciers melting faster than normal.

Note that this often affects mountain runoff that gives the main freshwater resources for all of life downstream.

Hence, In the case of the large forest fire burns in Canada, the option that is known to be true is option B: . The Greenland glaciers will melt faster.

A large forest fire burns in Canada, dropping black carbon on Greenland. Which of the following is true?

A. The Greenland glaciers will be protected from melting as the ash will insulate the ice.

B. The Greenland glaciers will melt faster.

C. The black carbon will not affect the Greenland glaciers.

D. It is unknown as to what effect the black carbon would have on the Greenland glaciers.

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2 years ago