Answer:
"any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates."
Explanation:
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B
This because the cactus now has mutual partnership with the hawk. The hawk gains protection of its nest because of the thorns on the cactus, and the cactus can benefit by the hawk and its young defacating near the cactus and on it to provide nutrients and act as a form of fertilizer
Answer:
The wing of butterflies compared to that of birds and bats show <u><em>analogy</em></u>.
Explanation:
In the field of biology, analogy can be described as organisms which might have the same function but different biological origin. As we know, all of the flying animals have wings to fly. But all these organisms might not have a common origin. When comparing bats and birds to butterflies, we can see that butterflies have two pair of wings whereas, bats and birds have a single pair. Also, there are many other differences like the wing of a bird has feathers while butterflies do not have feathers.
melatonin is a hormone secreted by the pineal gland and its main function is to regulate sleep rhythm (circadian rhythm)
