Answer:
1. Adaptive radiation: A pattern of evolution in which slightly different species evolve from one common ancestor.
2. Coevolution: A pattern of evolution in which two species evolve in relation to each other.
3. Convergent evolution: A pattern of evolution in which similar characteristics evolve between two unrelated species.
4. Divergent evolution: A pattern of evolution in which very different species evolve from one common ancestor.
5. Gradualism: A theory of evolution that states that a species evolves by consistent, small, steps.
6. Punctuated equilibrium: A theory of evolution that states that a species evolves in spurts of rapid change and then no change.
Answer:
The correct answer will be option-C
Explanation:
The rhythm of the heartbeat is controlled by the pacemaker of the heart called the sino-atrial node.
The SA node generates action potentials which trigger the contraction and relaxation of the atrium and ventricles. The membrane potential generation initiates by the depolarization of the cell membrane when the L type of Ca⁺² ions opens up and calcium ions enter the cell.
This depolarizes the cell until the potential threshold is reached which lies between the -40 and -30 mV.
Thus, Option-C is the correct answer.
The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
