Answer:
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Greenhouse gases are certain molecules in the air that have the ability to trap heat in the Earth's atmosphere. Some greenhouse gases, like carbon dioxide (CO2) and methane (CH4), occur naturally and play an important role in Earth's climate. If they didn't exist, the planet would be a much colder place.
Explanation:
Answer: it's C
Explanation: At the same time, the Southern Hemisphere is tilted away from the sun and experiencing winter. The summer season begins in the Northern Hemisphere on June 20 or 21, known as the summer solstice, when the axis of rotation is tilted a full 23.5° toward the sun.
How
often an allele occurs in the gene pool is allele frequency.
<span>Allele
frequency defines how common an allele is in a population. It can be calculated
by counting how many times the allele appears in the population and then
dividing by the total number of copies of the gene.</span>
