List - I | List – II | ||
A. | Migratory flamingoes and resident fish in South American lakes | i. | Interference competition |
B. | Abingdon tortoise became extinct after introduction of goats in their habitat | ii. | Competitive release |
C. | Chathamalus expands its distributional range in the absence of Balanus | iii. | Resource Partitioning |
D. | Five closely related species of Warblers feeding in different locations on same tree | iv. | Interspecific competition |
A. Migratory flamingoes and resident fish: Flamingoes and fish likely compete for some shared resources in the lakes, representing interspecific competition. A-IV
B. Abingdon tortoise extinction: Goats outcompeted the tortoises for resources, leading to their extinction. This illustrates interference competition, where one species directly prevents another from accessing resources. B-I
C. Chathamalus competitive release: With Balanus absent, Chathamalus experienced no longer being limited by competition, expanding its range. C-II
D. Warblers feeding in different locations: These warblers have likely evolved to partition resources by feeding in distinct areas of the tree, reducing competition. This is resource partitioning. D-II
Study the figure given below and answer the questions that follow.
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.
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: