Question

Evolution Biology Help

Please only answer 2-1 ASAP

) parasiic C) competitivea altruistiC Part 2. Answer both questions. 2-1. Name three species concepts, state what each one's main principle or criterion is, and describe one advantage and one weakness of each. 2.2

Answer 1

Answer=

2-1]Three species concepts are as follows:

1.Morphological species concept/Typological species concept-

principle- According to this concept .there are number of diversities on the surface of the earth that exist as a limited number of universals or types.These types do not bear any relationship to each other.

one species is different from another species by physical features and can be recognised by their morphological species concept.

weakness- i]due to several phenomenon such as sexual dimorphism,polymorphism and age differences,the same species develop strikingly morphological differences.

ii] This concept is not applicable in case of sibling species because they are alike but belong to different species.

2.Biological species concept =

principle- is based on the principle that a species is a group of interbreeding natural population that is productively isolated from other such groups.

Advantage- Mayr's biological concept is widely accepted to the zoologists

Weakness- shortcomings of this concept are criticised by the evolutionists when applied to certain groups.

1.lack of information

2.Apomictic and asexual groups.

3.Evolutionary species concept =

principle- is a lineage (an ancestral -descendant sequence of populations) evolving separately from others and with its own unitary evolutionary role and tendencies.

advantage -It helps to remove some limitations of biological species concept.

weakness -i] this species concept is applicable only tp the isolated population and incipient species but not applicable to single species.