The reasons are:
- the blood is very low on nutrition
- the leech is not feeding itself regularly
The leech slows it metabolism a lot, so it can survive on very low nutrition. The blood is very low on nutrition, and it is the leech's food source, so the evolution made it preserve energy.
The leach doesn't have the opportunity to feed itself on regular basis, so it takes maximum advantage of any opportunity and consumes as much blood as possible so that it can survive long term when it will not have food at disposal.
Quite possibly. It would be easier to take control over a brain that is at its most non active state which happens when it is dark, or very bright
Answer:
Crossing over
Explanation:
During prophase I of meiosis, homologous chromosomes pair to form bivalents. The chromatids of bivalents may form intimate contact points called chiasmata. At the chiasmata breakage may occur and exchange of chromatids segments between non sister chromatids may take place. This is crossing over ad results in new gene combinations causing variations.
Inhaling and exhaling
<span>Air Vibrating the Vocal Cords Creates Sound
</span><span>Olfaction, or Smelling, Is a Chemical Sensation
</span><span><span>External Respiration Exchanges Gases Between the Lungs and the Bloodstream</span></span>
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❖ The correct answer choice is B. They share a common ancestor.
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