Answer: Age range is from 70.6 to 0.0 million years ago.
The cell membrane is a selectively permeable membrane which controls what goes in and out to ensure that not just anything comes in through it's own accord.
Answer:
B. The allele frequency of T is 0.84, and the allele frequency of t is 0.16.
Explanation:
The Hardy-Weinberg equation is:
p2 + 2pq + q2 = 1
Where:
p = the frequency of the dominant allele
q = the frequency of the recessive allele
1 = the total number of alleles
Given that 16 individuals out of 100 are unable to taste PTC, we can calculate that the frequency of the recessive allele, q, is 0.16. We can then use the Hardy-Weinberg equation to solve for the frequency of the dominant allele, p:
p2 + 2pq + q2 = 1
p2 + 2p(0.16) + (0.16)2 = 1
p2 + 0.32p + 0.0256 = 1
p2 + 0.32p - 0.9144 = 0
(p + 0.32)(p - 2.84) = 0
p = -0.32 or p = 2.84
Since the allele frequencies must add up to 1, we know that p cannot equal -0.32. This leaves us with p = 2.84. Therefore, the allele frequency of the dominant allele is 2.84, and the allele frequency of the recessive allele is 0.16.
- <u>To science we owe dramatic changes in our </u><u>smug self-image.</u><u> </u><u>Astronomy taught </u><u>us that our earth isn't the center of the universe but merely one of billions of heavenly bodies. </u>
- <u>From </u><u>biology </u><u>we learned that we weren't specially created by God but evolved along with millions of other species. </u>
Why was agriculture the worst mistake in human History?
- Along with epidemic diseases, starvation, and malnutrition, farming also contributed to the creation of severe class distinctions.
- Hunter-gatherers rely solely on the wild plants and animals they catch each day, with little to no food stored and no concentrated food sources, such as an orchard or a herd of cows.
Was the agricultural revolution good or bad?
- Between 1700 and 1870, it is thought that both total agricultural output and output per worker increased by a factor of 2. 7 times.
- Britain's agriculture is the most productive in Europe thanks to the Agricultural Revolution, with 19th-century yields up to 80% higher than the continental average.
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