Mutations occur at the same rate in both exons and introns, but 

a) If unwanted mutations occur at exons they are conserved more effectively by selection

b) Exons are negatively selected when undergo mutation

c) Introns may more freely accumulate point substitutions and other changes due to no selection pressure. 

d) exon mutations are eliminated more effectively by selection.

Which of the above is true regarding introns and exons 

TLS Online TPP Program

#Question id: 24554

#Unit 9. Diversity of Life Forms

several species arise from a common ancestor over a short time called___

TLS Online TPP Program

#Question id: 27938

#Unit 9. Diversity of Life Forms

Those species which look alike or morphologically similar but cannot breed with each other, such type species is called______

TLS Online TPP Program

#Question id: 27939

#Unit 9. Diversity of Life Forms

Which of the following phenomenon is not applicable for biological species concept?

a.Allopatric population

b.Sexually reproducing species

c. Hybrid species

d. Fossils

TLS Online TPP Program

#Question id: 27940

#Unit 9. Diversity of Life Forms

Sibling species are those species which is___

TLS Online TPP Program

#Question id: 8840

#Unit 9. Diversity of Life Forms

There are at least a dozen known species in the extinct genus Lystrosaurus. If each species was suited to a quite different environment, then this relatively large number of species is likely due to

TLS Online TPP Program

#Question id: 8841

#Unit 9. Diversity of Life Forms

Adaptive radiations can be a direct consequence of four of the following five factors. Select the exception.