Which of the following organ belongs to the internal layer of gastrula?

TLS Online TPP Program

#Question id: 12091

#Unit 10. Ecological Principles

Which of the following is a postzygotic isolating mechanism in speciation?

TLS Online TPP Program

#Question id: 12092

#Unit 10. Ecological Principles

The phenomenon of genetic drift is most likely to occur in populations that

TLS Online TPP Program

#Question id: 12093

#Unit 10. Ecological Principles

The resemblance of body structure and mode of life of some species of Australian marsupials to certain species of placental mammals is an example of

TLS Online TPP Program

#Question id: 12094

#Unit 10. Ecological Principles

Which of the following plant groups is now extinct?

TLS Online TPP Program

#Question id: 12095

#Unit 10. Ecological Principles

It is now thought that the atmosphere of the primitive Earth was composed largely of carbon dioxide, nitrogen, and water vapor. The composition of certain iron-containing minerals suggests that the carbon dioxide began to be replaced by oxygen about 2 billion years ago.   Which of the following is the best explanation for the change in atmospheric composition?

TLS Online TPP Program

#Question id: 12096

#Unit 10. Ecological Principles

An important evolutionary benefit of sexual reproduction is that