Biological molecules such as proteins and DNA reveal differences between humans and chimps that would have taken around 7 million years to accumulate.
<h3>What is DNA?</h3>
All known animals and viruses have genetic information in the form of deoxyribonucleic acid, a polymer consisting of two polynucleotide chains that coil around one another to form a double helix. Ribonucleic acid is a type of nucleic acid, as is DNA.
The two DNA strands are known as polynucleotides because they are constructed from simpler monomeric units called nucleotides.
The four nucleobases that contain nitrogen—cytosine (C), guanine (G), adenine (A), or thymine (T)—along with deoxyribose and a phosphate group—make up each nucleotide. The sugar of one nucleotide and the phosphate of the following make covalent bonds, creating what is known as the phospho-diester linkage, which results in an alternating sugar-phosphate backbone.
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The 4 types of air masses are polar, tropical, continental and maritime.
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Deposition by the river replenishes soil in the wetlands with sediment and nutrients illustrates a positive effect that the Nueces River has on the wetlands.
Option: C
Explanation:
A river in its lower course leave the high elevated area and enters into the flat land. In the lower course of the river deposition is the prime work of a river. Estuary, delta are some of the landform that formed in the lower course of a river. Here, Nueces estuary is formed where Nueces river enters into the gulf.
In this gulf a wetland is formed which supports aquatic life and a dwelling place for them and land species also. Here, river deposits all its sediments and replenish the soil of wetland with new sediments and nutrients.
Answer:
the frequency of the resistant allele after one generation is 0.989
Explanation:
Given that :
A farmer plants Bt cotton that is genetically modified to produce its own insecticide.
Of the cotton bollworms feeding on these Bt plants, only 5% survive
i.e the survival rate s = 5% =0.05
unless they have at least one copy of the dominant resistance allele R that confers resistance to the Bt insecticide
Frequency of R allele = 0.01
In order to determine what will the frequency of the resistance allele be after one generation of cotton bollworms fed on Bt cotton; we need to first determine the frequency of the recessive allele r.
According to Hardy-Weinberg Equilibrium ;
p+q = 1
Let p = R and q = r
R + r = 1
0.01 + r = 1
r = 1 - 0.01
r = 0.99
Now; the frequency of the resistance allele after one generation can be calculated as :
where ;
q' = R
q = r
q' = 0.989
Thus; the frequency of the resistant allele after one generation is 0.989
Answer:b
Explanation:
Heterogeneous mixture because it is not chemically bound together
