Answer:
Natural selection is a adaptation process of evolution.
Explanation:
As the battles are the most diverse type of insects on the planet they consist of about 400,000 or more species of them on the planet. They use camouflaged while others are easily visible and its due to this natural property that they acquired from the environment they can easily blend in with the natural features of the real world. Such as the barks or the branches of the tree. Some of them can chemically be camouflaged as well, mostly to avoid predators and keep them away.Final answer:
Natural selection allows camouflaged beetles to thrive because it increases their survival rate; as predators find it harder to spot them. Environmental changes like pollution can alter the selective pressure, favoring those beetles whose coloration matches the new environment, leading to a population shift in coloration over time.
Explanation:
Natural selection allows beetles that are camouflaged to flourish in their environment because it favors individuals with traits that enhance their chances of survival and reproduction. When a change in the environment occurs, such as pollution darkening the tree trunks, it may cause a shift in the population's coloration. In the context of beetles, if the environment becomes darker due to pollution, predators like birds will find it easier to spot and eat beetles that contrast with their background, hence light-colored beetles will stand out.
On the contrary, dark-colored beetles which blend in with the now darkened tree trunks will escape predation more effectively and have a higher chance of surviving to pass their genes to the next generation. Over time, the beetle population will shift towards more dark-colored individuals – a process analogous to the famous case of the peppered moth during the Industrial Revolution in England. This shift in beetle coloration exemplifies natural selection, where the adaptive advantage of being camouflaged leads to a change in the population's physical characteristics.
What is a hypersaline bay?
Answer:
1. Why do all the energy we use comes from the
sun?
Answer: This question doesn't have much detail and not all the energy we use comes from the sun. There are multiple sources of energy.
1. Write the letter of the dominant allele.
Answer:
B, T
Explanation:
Dominant alleles are represented with an UPPERCASE letter. Recessive alleles are represented with a LOWERCASE letter
The letter of the dominant allele represents the uppercase version of the corresponding gene. In genetics, alleles are different forms or variations of a gene that occupy the same position or locus on a chromosome. Each gene has two alleles, one inherited from each parent.
When determining the letter of the dominant allele, it is important to consider the dominant-recessive relationship between the alleles. The dominant allele is the allele that is expressed or seen in the phenotype when present, even if there is only one copy of it. It masks the expression of the recessive allele.
For example, in the case of eye color, let's say the gene for brown eye color (B) is dominant over the gene for blue eye color (b). If an individual inherits one allele for brown eyes (B) from one parent and one allele for blue eyes (b) from the other parent, their genotype would be Bb. However, since the brown eye color allele (B) is dominant, the individual's phenotype would be brown eyes.
In this case, the letter of the dominant allele is B. It represents the dominant gene for brown eye color.
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Why choose that gene for PCR in the bacterial identification lab?
It is highly variable so will show slight differences between distantly related species
It is just what everyone else does, the actual gene doesn't matter, just the sequence comparison.
The primers are easy to obtain for it.
it is highly conserved so will show slight differences between distantly related species
Answer:
Background
During the course of a bacterial infection, the rapid identification of the causative agent(s) is necessary for the determination of effective treatment options. We have developed a method based on a modified broad-range PCR and an oligonucleotide microarray for the simultaneous detection and identification of 12 bacterial pathogens at the species level. The broad-range PCR primer mixture was designed using conserved regions of the bacterial topoisomerase genes gyrB and parE. The primer design allowed the use of a novel DNA amplification method, which produced labeled, single-stranded DNA suitable for microarray hybridization. The probes on the microarray were designed from the alignments of species- or genus-specific variable regions of the gyrB and parE genes flanked by the primers. We included mecA-specific primers and probes in the same assay to indicate the presence of methicillin resistance in the bacterial species. The feasibility of this assay in routine diagnostic testing was evaluated using 146 blood culture positive and 40 blood culture negative samples.
Explanation:
Results
Comparison of our results with those of a conventional culture-based method revealed a sensitivity of 96% (initial sensitivity of 82%) and specificity of 98%. Furthermore, only one cross-reaction was observed upon investigating 102 culture isolates from 70 untargeted bacteria. The total assay time was only three hours, including the time required for the DNA extraction, PCR and microarray steps in sequence.