Question

Arrange the different parts in the correct sequence to form a meaningful sentence/paragraph.
P : Fossil evidence suggests that the mammals
underwent adaptive radiation to produce the
range of mammal types extant today.
Q : Adaptive radiation, in the life sciences, refers
to the differentiation (or savageness) of one
or a few species into many to till a large number
of related ecological niches by adaptation
R : Thus the first bird species may have given rise
to many more bird species by adaptive radiation
S : Typically, a species adapts to colonize a new
habitat and, this adaptation opening up a new
range of niches, adapts again to fill the new
niches which are presented.

• A. R Q P S
• B. Q S R P
• C. Q P S R
• D. R Q S P

Answer 1

The correct option is B Q S R P

The first statement in the sequence should be the one that introduces a new topic. It should not be a continuation or extension of a topic.

Q is first in the sequence: Q introduces the topic of Adaptive Radiation. It gives us the definition of adaptive radiation. Since it is the only phrase that introduces a topic, it is first.

Q is followed by S: S continues Q's point and tells us why species undergo adaptive radiation.

S is followed by R: R provides an example for S. It gives birds as an example of a species that might have undergone adaptation as stated by S.

R is followed by P: P provides evidence to support the above discussed theory. It says that fossil evidence suggesting adaptive radiation has been found.

Thus, the correct sequence is Q S R P. Hence, B is the correct option.