The following is comparable to a professional dinner guest
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- Competitive organism
- Commensal
- Parasite
- Predator
The Correct Option is C
Solution and Explanation
Top Questions on Ecology and Environment
Study the figure given below and answer the questions that follow.
- Identify the figure and state its importance.
- Why is air diffused into the aerator tank? Explain.
-
- [(i)] What changes take place in the settling tank?
OR - [(ii)] How is BOD related to organic matter present in the water?
- [(i)] What changes take place in the settling tank?
- CBSE CLASS XII - 2025
- Biology
- Ecology and Environment
- Name the type of food chains responsible for the flow of larger fraction of energy in an aquatic ecosystem and a terrestrial ecosystem, respectively. Mention any two differences between the two food chains.
- CBSE CLASS XII - 2025
- Biology
- Ecology and Environment
- (a) What do you mean by activated sludge in an STP?
(b) Explain the biological treatment of the major part of the sludge transferred from the large aeration tank into the anaerobic sludge digesters before its final release into the natural water bodies.- CBSE CLASS XII - 2025
- Biology
- Ecology and Environment
- Correctly depict (also indicate the trophic level) and describe the ecological pyramid of biomass in sea with 40 standing crop of phytoplankton supporting 90 standing crop of zooplankton which further supports 120 small fishes.
- CBSE CLASS XII - 2025
- Biology
- Ecology and Environment
Highly conserved proteins such as Haemoglobin and Cytochrome-C provide the best biochemical evidence to trace evolutionary relationships between different groups. Cytochrome-C is formed of 104 amino acids. Cytochrome-C is the respiratory pigment present in all eukaryotic cells. It has evolved at a constant rate during evolution. In chimpanzees and humans, Cytochrome-C genes are identical. The given data shows the evolution of the Cytochrome-C gene in different mammals from kangaroos, cows, rodents to humans:
Groups Nucleotide substitution in the gene of Cytochrome-C Millions of years ago Human/Kangaroo 100 125 mya Human/Cow 75 120 mya Human/Rodent 60 75 mya (a) Select the correct option for the time of separation of two groups and the number of nucleotide substitutions in the gene of Cytochrome-C:
Options Time of separation of two groups during evolution Number of nucleotide substitutions (i) Lesser Greater (ii) Greater Lesser (iii) Greater Greater (b) What do you infer about the type of evolution (convergent or divergent) for the given pair of groups and why?
(i) Human and Kangaroo
(ii) Human and Rodent
(c)
(i) Define convergent evolution.
OR
(ii) Define divergent evolution.- CBSE CLASS XII - 2025
- Biology
- Ecology and Environment
Questions Asked in AP EAPCET exam
- If \(x^2 + y^2 = 25\) and \(xy = 12\), then what is the value of \(x^4 + y^4\)?
- If \( i = \sqrt{-1} \), then \[ \sum_{n=2}^{30} i^n + \sum_{n=30}^{65} i^{n+3} = \]
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- If $ 0 \le x \le 3,\ 0 \le y \le 3 $, then the number of solutions $(x, y)$ for the equation: $$ \left( \sqrt{\sin^2 x - \sin x + \frac{1}{2}} \right)^{\sec^2 y} = 1 $$
- AP EAPCET - 2025
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- The number of all five-letter words (with or without meaning) having at least one repeated letter that can be formed by using the letters of the word INCONVENIENCE is:
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- If \( \log_2 3 = p \), express \( \log_8 9 \) in terms of \( p \):
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