Will someone please help me out.. I have been posted these questions for 7 hours .. but no one has helped me out..please help me out..I got to figure it out within today..please..
1. Which of the following is a biotic factor that might affect the life of a water-dwelling organism?
A. Temperature of the water
B. Speed of water current
C. Pollutions in water
D. Bacterial population in water
My guess: D?
2. Which of the following things does NOT allow plants to obtain atmospheric nitrogen in a more usable form?
A. Photosynthesis
B. Lightning
C. Symbiotic bacteria
D. Chemical fertilizers
My guess: A?
3. How does the amount of water on Earth change as a result of the water cycle?
A. It always increases
B. It alternately increases and decreases
C. It remains constant
D. It always decreases
My guess: C?
4. Are the third-order heterotrophs consumed by gungal decomposers?
My guess:Yes?
5. Which of the following fixes atmospheric N2 (nitrogen gas)?
A. photosynthesis
B. symbiotic bacterianon the roots of legumes
C. uv light
D. decay organisms
E. autotrophs
My guess: B?
6. Which ecological pyramid best explains why food chains are typically only three or four links long?
A. Pyramid of biomass
B. Pyramid of energy
C. Pyramid of numbers
D. None of the above
My guess: B? Because only around 10% of the energy will released to the next level?
Any help will be appreciated!
I don't know number 4. The rest are correct.
Oops.. typo for #4.. It should be..
Are the third-order heterotrophs consumed by fungal decomposers?
My guess:Yes?
Anyway, thanks,bobpursley!
I'd be happy to help you with these questions! Let's break them down one by one:
1. Which of the following is a biotic factor that might affect the life of a water-dwelling organism?
A. Temperature of the water
B. Speed of water current
C. Pollutions in water
D. Bacterial population in water
To determine the correct answer, we need to identify which factor is a living component that can affect the organism. In this case, both pollutants and bacterial population are biotic factors. Therefore, the correct answer is D.
2. Which of the following things does NOT allow plants to obtain atmospheric nitrogen in a more usable form?
A. Photosynthesis
B. Lightning
C. Symbiotic bacteria
D. Chemical fertilizers
To find the correct answer, we need to identify which option does not contribute to plants obtaining atmospheric nitrogen in a more usable form. Photosynthesis is not directly involved in obtaining atmospheric nitrogen, so the correct answer is A.
3. How does the amount of water on Earth change as a result of the water cycle?
A. It always increases
B. It alternately increases and decreases
C. It remains constant
D. It always decreases
To determine the correct answer, we need to understand the water cycle. Water evaporates from bodies of water, condenses into clouds, falls as precipitation, and flows back into bodies of water. This cycle repeats continuously, so the amount of water on Earth remains relatively constant. Therefore, the correct answer is C.
4. Are the third-order heterotrophs consumed by fungal decomposers?
To answer this question, we need to understand the concept of trophic levels in an ecosystem. Third-order heterotrophs are organisms that occupy a higher trophic level. Fungal decomposers, on the other hand, are decomposers that break down organic matter. Third-order heterotrophs can eventually end up as a source of nutrients for decomposers, including fungal decomposers. Therefore, the correct answer is Yes.
5. Which of the following fixes atmospheric N2 (nitrogen gas)?
A. Photosynthesis
B. Symbiotic bacteria on the roots of legumes
C. UV light
D. Decay organisms
E. Autotrophs
To determine the correct answer, we need to identify the process or organism that converts atmospheric nitrogen into a usable form. In this case, symbiotic bacteria on the roots of legumes are nitrogen-fixing bacteria that convert atmospheric nitrogen into a usable form for plants. Therefore, the correct answer is B.
6. Which ecological pyramid best explains why food chains are typically only three or four links long?
A. Pyramid of biomass
B. Pyramid of energy
C. Pyramid of numbers
D. None of the above
To determine the correct answer, we need to understand the concept behind ecological pyramids. The pyramid of energy best explains why food chains are typically only three or four links long. Energy is lost at each trophic level, so there is not enough energy available at higher levels to sustain longer food chains. Therefore, the correct answer is B.
I hope this helps you with your questions! Let me know if you have any further queries.