The species diversity between two adjacent ecosystems is
Show Hint
- $\alpha$-diversity
- $\beta$-diversity
- $\gamma$-diversity
- $\delta$-diversity
The Correct Option is B
Solution and Explanation
$\alpha$-diversity is within a single community.
$\gamma$-diversity is overall diversity in a region.
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
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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
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