Indicate which of the various species concepts would be most applicable for each

Question

Indicate which of the various species concepts would be most applicable for each scenario. To distinguish two species based on the degree of genetic exchange between their gene pools. To distinguish two species of extinct organisms based on fossil information. To distinguish two species of similar spiders based on differences in food and habitat. Polyploidy is a common mechanism of speciation in angiosperms, which are flowering plants. It is estimated that 30% - 70% of present day angiosperms are polyploid. From phylogenetic studies, it has been proposed that the genome of the most primitive angiosperms consisted of 7-11 chromosomes. Complete the table below. Four angiosperms are indicated. Indicate either your expectation for the probably ancestor haploid number, the present day chromosome number, or the level of polyploidy expected. The ploidy level is usually reported as an integer factor of n, the haploid number of the ancestor

Explanation / Answer

Question 1.

Subquestion i.

Biological species concept

A biological species is a group of individuals that can breed together. They cannot breed with other groups.

Subquestion ii.

Phylogenetic species concept.

Phylogenetic species concept applies to sexual, asexual organisms and fossils. In contrast, biological species concept is not applicable to asexual organisms and fossils.

Subquestion iii.

Ecological species concept

The ecological species concept defines species as a set of organisms adapted to a particular set of resources, called a niche, in the environment.

Question 2;

White potato      answer is 48

4n = 4 x 12 = 48

Kiwifruit     Answer is 6n

174/29 = 6n

Cotton     answer is 52

4n = 4 x 13 = 52

Banana     answer is 11

33/3 = 11

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---