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blagie [28]
4 years ago
10

How do humans negatively impact the tundra biome

Biology
2 answers:
masya89 [10]4 years ago
5 0
Burn fossil fuels and cause animals tomove away
alexgriva [62]4 years ago
3 0
When people burn fossil fuels it feeds into global warming. Global warming is melting the permafrost in these tundra regions causing them to collapse.
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2. In gluconeogenesis, it takes two enzymes to convert pyruvate to phosphoenolpyruvate. a. Explain what is happening chemically
Marina CMI [18]

Answer:1. Pyruvate carboxylase

2. Phosphoenol pyruvate carboxy kinase

Explanation:

The conversion of pyruvate to phosphoenol pyruvate is catalyzed by two enzymes Pyruvate carboxylase and phosphoenol pyruvate carboxy kinase

1. Pyruvate carboxylase reaction

Pyruvate in the cytoplasm enters the mitochondria. Then, carboxylase of pyruvate to oxaloacetate is catalysed by a mitochondrial enzyme, pyruvate carboxylase. It needs the co-enzymes biotin and ATP.

The oxaloacetate formed has to be transported from the mitochondrial to the cytosol because further reaction of gluconeogenesis are taking place in cytosol.

2. Phoaphoenol pyruvate carboxy kinase (PEPCK)

In the cytoplasm, PEPCK enzyme then converts oxaloacetate to phoaphoenol pyruvate by removing a molecule of CO2. GTP or ITP donates the phosphate group.

The net effect of these two reactions is the conversion of pyruvate to phoaphoenol pyruvate. This circumverts the irreversible step in glycolysis catalyzed by pyruvate kinase (step 9 if glycolysis)

5 0
3 years ago
What characteristic do all Imperfect Fungi have in common?
Olenka [21]
The answer is b) "No known sexual mode of spore formation
6 0
3 years ago
How long do mud turtle eggs take to hatch?
andriy [413]
For most turtles the incubation ranges from 45 and 75 days.
5 0
4 years ago
Suppose you travel to a tropical place like the Bahamas and watch the coastal poikilotherms, such as fish, crabs, and starfish,
PilotLPTM [1.2K]

Answer:

The correct answer is -

exposure of the opposite environments to the species and see if they are able to be active in cold waters.

If they are then species of organism in Maine and could have more ice-nucleating agents which are responsible for their high ability for activity in cold waters.

Explanation:

To test the assess if the Maine species of organisms are especially able to be active in cold waters an experiment can be designed where one needs to place the species or animals from Maine and Bahamas in reverse conditions.

Maine animals are placed in warm water environments and species from the Bahamas can be placed in cold water. Finding if they are able to adapt in reverse condition by calculating various processes and motion, if yes then  it shows that it is not a special ability to survive in cold temps. However, if it is not then the Maine poikilotherms are specially designed for their environment. In case of yes then species of organism in Maine and could have more ice-nucleating agents

6 0
3 years ago
Dioxin, produced as a by-product of various industrial chemical processes, is suspected of contributing to the development of ca
Degger [83]

Answer: Transcription factors

Explanation:  

The dioxin enters the blood stream and the fat cells and liver cells store it.

While moving inside the cell the dioxin binds to the protein called Aryl hydrocarbon which then binds to the second receptor.  

The complex is then carried to the nucleus of the cell. This tends to on and off certain genes.

This turning on and off of the genes in the cell can lead to serious diseases like cancer, decreased immune function, et cetera.

7 0
4 years ago
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