Answer:
The Independent or Manipulated Variable
Explanation:
The Independent or Manipulated Variable is the variable that is changed by the researcher. The Dependent or Responding Variable is the result of that change.
Answer:
The correct answer would be Atria push blood into the ventricles and Ventricles push blood out of the heart.
In humans, four chambered heart is present with two atria and two ventricles.
Deoxygenated blood from all over the body is passed into the right atrium through vena cava (superior and inferior).
Simultaneously, oxygenated blood from the lungs is passed into the left atrium of the heart with the help of pulmonary vein.
Both the atria contract at the same time to drain their blood into respective ventricles.
The ventricles undergo relaxation while receiving blood.
The valves present between the atria and ventricles (tricuspid and bicuspid valve) ensures that the blood flows in one way direction only. They shut down as the ventricles contract and produce the sound "lub".
The ventricles contract simultaneously to pump blood out of the heart. The right ventricle pumps deoxygenated blood into pulmonary artery which takes the blood to the lungs for oxygenation.
The left ventricle passes the oxygenated blood through aorta to all the parts of the body.
The pulmonary and aortic valves prevent the back flow of blood and shut at the same time which creates second sound called as "dub".
Answer: it will be A..
Explanation: Gene flow is the transfer of genes across two populations. This happens if there is mating between the two populations. However, this can be curtailed either by allopatry (due to geographical isolation) or sympatry (due to behavioral isolation) which results in reproductive isolation between the two populations. If the two population were of the same species, then the reproductive isolation can result in divergent speciation of the two populations.
Answer:
Population density just represents the average number of individuals per unit of area or volume. Often, individuals in a population are not spread out evenly. ... Population distribution describes how the individuals are distributed, or spread throughout their habitat.
Answer:
Re-replication is allowed on geminin depleted cells
Explanation:
The depletion of the geminin gene by the siRNA leads to re-replication of portions of the genome. This is due to the protein Geminin be responsible to inhibit the replication factor cdt1 and therefore one replication round is allowed in wild type cells at the S phase. Therefore, Geminin-depleted cells will re-replicate their genome causing the enlargement of the nucleus.
