That would be active transport
Like the right atrium, the left atrium also has valve in its auricle.
<h3>What is heart?</h3>
The heart is defined as the major organ of the cardiovascular system which is used by the body to pump blood through out the cardiovascular system.
The heart is made up of the following:
Both the left and right atrium are separated from the ventricle by the valves which helps to prevent the back flow of blood.
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It is the variable being controlled/changed to see if there are any effects on the dependent variable (the thing getting tested/measured)
Transduction is the process by which foreign DNA is introduced into a cell by a virus or viral vector. An example is the viral transfer of DNA from one bacterium to another and hence an example of horizontal gene transfer.
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Answer:
The correct answer will be option-pollen.
Explanation:
The pollen are the male gametophyte which is produced in the seed plants.
The pollen produce male gametes after entering the female gametophyte. The male gametes fuse with the egg cell and form the embryo inside ovary which matures and forms seeds. The vascular seed plants lack these pollen but instead produces male gametes in gametangia which are replaced by the pollen in the seed plants.
Thus, option-pollen is the correct answer.
