The correct answer is - A. Death rate.
We get the fertility rate from the birth rate and the death rate. More specifically, from the number of the children that are born in a given time frame (usually a year) we minus the number of the people that have died in the same time frame, so the difference between them gives us the fertility rate.
The fertility rate can be positive (in the difference is a positive number) and negative (if the difference is negative number).
Answer:
Antigens on red blood cells are hereditary traits that allow blood to be typed in different ways. One system is based on a gene with two alleles, M and N. If the frequency of the M allele in a population is 0.4, then according to the Hardy-Weinberg rule, the expected frequency of the heterozygous MN genotype is 0.48.
Answer:
C) water vapor, cool air temperatures, and small particles of dust and smoke in the air
Frog cool so that’s basically why
During the Permian mass extinction more than 80% of the global animal species went extinct.
<h3>What was the Permian mass extinction? </h3>
This was one of the many mass extinction events that occurred during the Earth's history. Mass extinction events are global die-off's of animal species. Throughout history, these have been caused by many factors, but often include a sharp change in global weather conditions. The Permian mass extinction killed of 95% of all land species and 70% of all marine life, averaging around 80% in total species.
Therefore, we can confirm that during the Permian mass extinction more than 80% of the global animal species went extinct.
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