5. Scientists exposed plants to radioactive oxygen in different forms to observe how plants recycle oxygen during photosynthesis. Which conclusion would their observations support?
A. Carbon dioxide and water are recycled into glucose and oxygen gas.
B. Oxygen gas and water are recycled into glucose and carbon dioxide.
C. Glucose and water are recycled into carbon dioxide and oxygen gas.
D. Glucose and oxygen gas are recycled into carbon dioxide and water.
6. A river food chain works as follows: Algae —> insects —> salmon —> bears
The producers in the ecosystem produce 8,000,000 kilocalories of energy via photosynthesis. The bears need 100 kilocalories to survive. Can the ecosystem support the bears, and if so, how many?
A. No, 0 individuals.
B. Yes, 800 individuals.****
C. No, 0.8 individuals.
D. Yes, 80 individuals.
Please, help quick! I am 99.99999% sure 6 is 800/B. but I have no idea for 5.!!!!!
1. Spitting water into hydrogen and oxygen
2. Carbon Dioxide
3. Usable form of energy
4. Heat
5. Carbon Dioxide and water are recycled into glucose and oxygen gas.
6. 800 individuals (i think)
7. Living organisms decay, releasing carbon into the soil, and soil is compacted into rocks
8. Bacteria
9. Nitrogen fixation, nitrification, and denitrification
10. Energy flows in one direction, and matter cycles through the environment
11. Food webs are the best depictions of feeding relationships because they show many ways that plants and animals are connected
12. Essay
13. Essay
14. Essay
There ya go.
5. Well, let's think about this radioactive oxygen situation. If the scientists observed that plants recycle oxygen during photosynthesis, it means that oxygen is being used and reused in some way. So, let's look at the answer choices. Option A says carbon dioxide and water are recycled into glucose and oxygen gas. Hmm, that sounds logical. Plants take in carbon dioxide and water, and during photosynthesis, they produce glucose and oxygen. So, I would choose option A. Oxygen gas is definitely involved in the recycling process.
6. Ah, the river food chain dilemma. So, we have a chain starting with algae and ending with bears. If the producers, like algae, produce 8,000,000 kilocalories, that's quite a lot of energy. Now, if the bears need 100 kilocalories to survive, we can simply divide the total energy produced by the energy required by the bears. 8,000,000 divided by 100 gives us 80,000. So, it means the ecosystem can support 80,000 bears. Just kidding! That would be chaos! The answer is B: Yes, 800 individuals. Phew, that's a relief. No bear takeover today!
For question 5, the scientists exposed plants to different forms of radioactive oxygen to observe how plants recycle oxygen during photosynthesis. To determine the conclusion that their observations would support, we need to understand the process of photosynthesis.
During photosynthesis, plants use sunlight, carbon dioxide, and water to produce glucose and release oxygen gas. The equation for photosynthesis is:
6CO2 + 6H2O + sunlight -> C6H12O6 + 6O2
Based on this information, we can conclude that the correct answer for question 5 is A. Carbon dioxide and water are recycled into glucose and oxygen gas.
For question 6, we are given a river food chain where algae are the producers, and the energy flow goes from algae to insects, then to salmon, and finally to bears. It is stated that the producers in the ecosystem produce 8,000,000 kilocalories of energy via photosynthesis.
We also know that the bears need 100 kilocalories to survive. To determine if the ecosystem can support the bears and how many, we divide the total energy produced by the energy required per bear:
8,000,000 / 100 = 80,000
Therefore, the ecosystem can support 80,000 bears. However, since the answer choices provided are not in the same format, we need to convert from scientific notation to standard form. 800 individuals is the correct answer, which corresponds to choice B.
So the answer for question 6 is B. Yes, 800 individuals.