The number of electrons in the outermost shell of an atom determines its reactivity.
What do you mean by "What is a shooting star, a comet or a meteor burning in our Earth’s Atmosphere?"
edit: ohhhhh you are asking what a shooting star is...
its particles of comets or astoroids/metor enter the atmosphere at very high speeds and burn up
Biological processes that systematically vary over a 24-hour cycle are called circadian rhythms and are regulated by a cluster of neurons called the suprachiasmatic nucleus.
<h3>What is the circadian rhythm?</h3>
The circadian rhythm refers to the biological process regulated by the duration of a calendar day, which is common for many organisms ranging from animals to plants.
The circadian rhythms enable the maintenance of homeostatic control of physiological functions and thus perform metabolic activities.
In conclusion, biological processes that systematically vary over a 24-hour cycle are called circadian rhythms and are regulated by a cluster of neurons called the suprachiasmatic nucleus.
Learn more about the circadian rhythm here:
brainly.com/question/4095233
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Option C
Humid subtropical climatic zone would these trees be found
<u>Explanation:</u>
The general trees seen in Humid Subtropical areas are largely evergreen trees, shrubs, and ferns. These are no mighty conifer trees similar to pine and spruce. Largest of these evergreens are more refined. The purpose many plants hereabouts are evergreens is because of the large months of warmness and steady rain.
These shrubs have accommodated to the natural climate circumstances. Numerous broad-leaf evergreens such as palm trees and ferns are seen hither. Douglas-fir-tanoak forest usually termed "mixed evergreen forest". A rich understory of herbs, shrubs, ferns, and fungi is discovered beneath the towering redwood and other conifers