Answer:
Independent variable
An
independent variable is a condition in a scientific study that is changed or
manipulated to test the effects on the dependent variable. The experimenter
controls the value of independent variable and its value represent inputs or
causes like potential reason for variation.
Additionally, there are
tendencies that independent variables are included in a scientific study especially
if the experimenter has no intention to test their effect directly.
1) longitudinal
2) Sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate
3) The Ossicles
4) electrical impulses from the ear
5) the sound reflects
This would be considered the synaptic cleft
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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