Following statements are regarding to cancer stem cell (CSCs).

a. A representative subpopulation of cancer cells with peculiar molecular aspects that resemble some of those typical of normal stem cells.

b. These cells are capable of replenishing the repertoire of identical cancer cells.

c. These cells cannot create heterogeneous progeny that differentiate into more mature cells.

d. These cells show extraordinary proliferative potential.

e. These cells show excessive programmed cell death.

Which of the following combination is correct?

#Question id: 11411

#Unit 10. Ecological Principles

Vulnerability to extinction can be linked to species following characteristics. Which of the following statement are correct?

 A. Rare species are more prone to extinction than common ones.

 B. Species that are capable of migrating between fragments of habitat, such as between mainland areas and islands, may be more resistant to extinction

 C. Organisms that are specialists are more likely to go extinct

 D. Species with naturally long life spans may be more likely to become extinct

#Question id: 11412

#Unit 10. Ecological Principles

following is criteria to qualify Hot spot.

a) r-selected species

b) High numbers of endemic species

c) Many different types of habitats

d) k- selected species

#Question id: 11413

#Unit 10. Ecological Principles

Which of the following is NOT an attribute of a species that makes it vulnerable to extinction?

#Question id: 11414

#Unit 10. Ecological Principles

Which of the following combination of species feature that affecting a species’ sensitivity to extinction?

#Question id: 11415

#Unit 10. Ecological Principles

Below is a list of various bird groups, with their typical age at maturity (in years). Which of these would you expect to have the greatest annual survival?

#Question id: 12564

#Unit 10. Ecological Principles