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Select the correct statement from the following?
A
Fitness is the end result of the ability to adapt and gets selected by nature
B
All mammals except whales and camels have seven cervical vertebrae
C
Mutations are random and directional
D
Darwinian variations are small and directionless
Detailed Solution
According to Darwin, fitness refers ultimately and only to reproductive fitness. To survive in a particular environment an organism needs to adapt to it; those that are better adapted survive, leave more progeny and are selected by nature.
So fitness is the end result of the ability to adapt and get selected by nature. This statement is correct.
Whales and camels also have seven cervical vertebrae, as almost all mammals do; the exceptions are the sloths and the manatee.
Mutations (de Vries) are random and directionless, not directional.
Darwinian variations are small and directional.
So the last two statements have the two descriptions interchanged, and the correct statement is the one about fitness.
So fitness is the end result of the ability to adapt and get selected by nature. This statement is correct.
Whales and camels also have seven cervical vertebrae, as almost all mammals do; the exceptions are the sloths and the manatee.
Mutations (de Vries) are random and directionless, not directional.
Darwinian variations are small and directional.
So the last two statements have the two descriptions interchanged, and the correct statement is the one about fitness.