Regulation by gradients of paracrine factor concentration was elegantly demonstrated by the specification of different mesodermal cell types in the frog Xenopus laevis by activin, a paracrine factor of the TGF-beta family. Which of the following observations are correct from this graph?

TLS Online TPP Program

#Question id: 11369

#Unit 9. Diversity of Life Forms

If new genetic variation in the experimental populations arose solely by spontaneous mutations, then the most effective process for subsequently increasing the

prevalence of the beneficial mutations in the population over the course of generations is

TLS Online TPP Program

#Question id: 325

#Unit 1. Molecules and their Interaction Relevant to Biology

A true statement about hydrophobic interactions is that they:

TLS Online TPP Program

#Question id: 26411

#Unit 3. Fundamental Processes

In the mammalian system which of the following is responsible for the removal of RNA primers of Okazaki fragments

TLS Online TPP Program

#Question id: 12265

#Unit 10. Ecological Principles

A metapopulation consists of

TLS Online TPP Program

#Question id: 5700

#Unit 8. Inheritance Biology

During meiosis, homologous chromosomes pair up along their lengths. The most plausible explanation for the karyotype structure shown above is that