Pioneer species, I think.
Answer:
<em> </em><em>I </em><em>think</em><em> </em><em>the </em><em>answer</em><em> is</em><em> True</em>
Its hard to believe it but its D.<span />
Answer:
Option D, A subject is observed both before and after two exposures to the treatment.
Explanation:
In A-B-A-B design the alphabets have following meaning
a) First A – It is the baseline value or the value measured before treatment
b) First B – It is the treatment measurement
c) Second A - It is the withdrawal of treatment
d) Second B – It is the reintroduction of treatment
The second A is known as the reversal phase in which the intervention is withdrawn to see if the target behavior returns to the baseline behaviour
Thus , there are two measurements involved one before the intervention and second after the intervention
Option D is correct
<span>Fish have adaptable behaviors and structures so that they can
survive in the wild. These adaptations however differ with regards to context
and environment. Some fishes for example are called stonefish because they can
camouflage in environments that are composed variedly with pebbles and rocks,
and this helps them to avoid predators and thrive. Nevertheless, when these
group of organisms are strayed and become exposed to a new environment they can
be exposed and be vulnerable to predators. </span>
