NEET BIOLOGY

GENETICS AND EVOLUTION

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Biological fitness is defined as ____
A
the average life span of an organism
B
the ability of an organism to survive and reproduce
C
the percentage of energy that is dedicated to mating
D
the amount of energy an organism can use in the environment
Explanation: 

Detailed explanation-1: -Biological fitness, also called Darwinian fitness, means the ability to survive to reproductive age, find a mate, and produce offspring. Basically, the more offspring an organism produces during its lifetime, the greater its biological fitness.

Detailed explanation-2: -Explanation: Biological or Darwinian fitness is defined based on the specimen’s ability to reproduce and generate viable offspring. Essentially, the fitness of the individual is based on its ability to pass genetic information on to the next generation, as opposed to any physical characteristic or trait.

Detailed explanation-3: -Yes, fitness in biology refers to the ability of an organism to survive and reproduce in its natural environment.

Detailed explanation-4: -It refers to an organism’s ability to successfully pass on its genes. So, if an organism has a trait that makes it, say, blend in with its environment better and thus avoid predators, it will likely outlive less-suited individuals and survive long enough to reproduce.

Detailed explanation-5: -Evolutionary biologists use the word fitness to describe how good a particular genotype is at leaving offspring in the next generation relative to other genotypes. So if brown beetles consistently leave more offspring than green beetles because of their color, you’d say that the brown beetles had a higher fitness.

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