Answer:
Reproductive isolation
Explanation:
Reproductive isolation is the lack of successful breeding between organisms of related species due to the existence of morphological, physiological, genetic or behavioural barriers.
Reproductive isolation mechanisms are classified into two:
- Pre-zygotic mechanisms, and
- Post-zygotic mechanisms
The pre-zygotic mechanisms act to prevent breeding or formation of zygote between organisms of related species while the post-zygotic mechanisms act to ensure that aborted or infertile zygote results in cases where fertilization takes place.
<em>The distinct characteristics observed in the species of butterfly can be viewed as a form of morphological reproductive isolation.</em>
Positive feedback in a system is a benefit for the entire system
Answer: Option B
<u>Explanation:</u>
The positive mechanism is a stimuli that the body exhibits when in time of need which actually benefits the entire system. When required the positive feedback runs to rescue and neutralize the effect caused by the negative impact which paves a way to maintain equilibrium throughout the body.
Many examples can be cited for this like blood clotting, during labor and even in ripening of fruits. Positive and negative feedback work hand in hand to maintain homeostasis in place. Positive feedback is required to enhance the system while the negative feedback is to inhibit the activity.
