Question

In a short essay/paragrpah answer the following question:

According to the field of biology, what explains the variety of reproductive and survival strategies that have appeared and disappeared from living organisms (past and present) since the origin of life on earth?

Using these words in your responce:

- Modern evolutionary synthesis

- Natural selection

- Adaptation

- Fitness

- Allele frequency

- Mutation

- Sexual selection

- Gene pool

- Scientific theory

- Resources

- Red Queen hypothesis

- Non-random mating

Answer 1

Answer : "Big Bang reproduction" strategies said at one extreme some organism produces a huge number of offspring once in their lifetime and then die or never reproduce again. Some species have a single offspring at a time. Most large mammals utilize reproductive strategies called Iteroparous reproduction.

In addition organisms differ in survivorship stragies. Some organisms are at high risk of dying early but if they can survive long they have decreasing probability of dying. Some species evolved in environments where the likelihood of survival was high and the risk of reproduction was low. In these situations natural selection favourd organisms that produced many offspring over a long period.

Over time natural selection genetic drift and gene flow are the mechanisms which changes the allelic frequency.

The Hardy Weinberg therom thus provides a null model for strategy of evolution.

Charles Darwin said in his book on the "origin of species " there is variation among individuals within same trait population and variation in trait is associated with variation in fitness.

Natural selection, genetic drift interplay amongst each other to bring evolution. By natural selection adaptation in organism grows.

The Red queen theory suggests that organisms must constantly adopt evolve and proliferate to gain reproductive advantage. thus reproductive and survival strategies plays very important role in evolution of organism and it's apperaence and disappearance from the environment.