To distinguish two species of extinct organisms based on fos

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.

3/

One species of grasshopper, Gryllus veletis mates in the spring. A closely related species of grasshopper,Gryllus pennsylvanicus mates in the fall. Their habitats partially overlap in the Pennsylvania and Ohio River Valley.

Is this an example of a prezygotic or postzygotic barrier?     

What type of reproductive isolating barrier is exhibited here?  

4/

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.

plant probable ancestor haploid number chromosome number ploidy level

white potato 12 4n   

kiwi fruit 29 174

cotton 13 4n

banana 33 3n

fill in the blank space

To distinguish two species based on the degree of genetic exchange between their gene pools.

Question 2 ndicate which of the various species concepts would be most applicable for each scenario. Not yet answered Points out of 1.00 To distinguish two species based on the biological P Flag question 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 3 One species of grasshopper, Gryllus veletis mates in the spring. A closely related species of Question Not yet answered grasshopper, Gryllus pennsylvanicus mates in the fall. Their habitats partially overlap in the Pennsylvania and Ohio River Valley. Points out of 1.00 P Flag question Is this an example of a prezygotic or postzygotic barrier? What type of reproductive isolating barrier is exhibited here? Polyploidy is a common mechanism of speciation in angiosperms, w hich are flowering plants Question is estimated that 30% 70% of present day angiosperms are p From phylogenetic Not yet answered studies, it has been proposed that the genome of the most primitive angiosperms consisted of Points out of 1.00 11 chromosomes P Flag question 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 rep as an integer factor of n the haploid number of the ancestor. Plant Probable ancestor haploid number Chromosome number Ploidy level white potato 12 4n kiwifruit 29 174 13 4n cotton 33 3n banana

Solution

Answer:

2. a. Which of the various species concepts distinguishes two species based on the degree of genetic exchange
between their gene pools?

Answer: Biological

b. To distinguish two species of extinct organisms based on fossil information.

Answer: Morphological

c. To distinguish two species of similar spiders based on differences in food and habitat.

Answer: Ecological

(Since there are more than 1 question, the first full question have been answered according to the rules of Chegg)