When you are approaching a river lock, you are expected to sound one prolonged blast and one short one in order to signal to the lock attendant that you want to pass through. You are to sound the blast when you are about one mile away from the river lock. The attendant will reply you with one of the traffic signals in order to instruct you about what to do.
The answer which is false is, gene flow leads to divergence and the formation of new species.
What is speciation?
For speciation to occur two populations must be prevented from interbreeding.
This means that populations must become isolated from on another through the geographical or biological barriers.
If populations remain isolated long enough, speciation will eventually occur because of changes accumulated in population due to natural selection.
What is gene flow?
Geographical isolation hampers gene flow because of spatial separation which in turn leads of reproductive isolation due to the inability of meeting gametes to leads.
It causes genetic drift due to the barrier of gene flow between them and parent species.
Certain alleles get fixed into population due to inbreeding in a smaller population while other gets eliminated, this leads to formation of new alleles and new gene pool, so-called progressive genetic divergence.
Finally there is the formation of new species when genetic variation are accumulated for several generations.
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A giant chromosome that contains thousands of DNA strands or Puffs is known as a polytene chromosome. In insects, like Drosophila, the polytene chromosomes are most usually found in salivary glands.
The puffs are the locations on the polytene chromosomes that are uncoiled regions and transcriptionally active. So, the genetic procedure, which is taking place in a puff of a polytene chromosome is a high level of transcription. For example, in the salivary gland of Drosophila, the polytene chromosomes go through various rounds of endoreduplication and articulate a higher concentration of a mucoprotein prior to the pupation.
The activity of transcription can be determined with the application of precursors of radioactively labeled RNA. The high activity of transcription would exhibit a greater volume of radioactivity from the precursors of RNA.
The correct answer is:
Emigration because it means people are moving out, causing the population to decrease along with a death rate.
Explanation:
if there are a high death rate and a large amount of emigration, populations will likely decrease. Emigration relates to an experience when an individual walked out to another place because of some reasons ( the most common one are: Rare resources, societal problems, depression, or solely because they required to try out their fate).
~Hello There!~
Here is the equation for photosynthesis:
Carbon dioxide + water ==> Glucose + oxygen
The answer is D. Oxygen and sugars.
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