Answer: A) a nucleus
Explanation: The largest amount of DNA in a plant cell is contained in a nucleus.
Answer:
Diffusion is the net movement of any substance from a higher concentration region to the lower concentration region. It is conducting by a concentration gradient.
Osmosis is a process in which solvent (molecules) pass through a semipermeable membrane (SPM) from a lower concentration solution region to a higher concentration region so it equalizes the concentrations on each side of the SPM.
A <u>hypotonic solution</u> is a solution that has a higher concentration of solutes inside the cell than outside of the cell. Thus the movement of water is from outside to the inside of the cell.
A <u>hypertonic solution</u> is a solution in which solutes concentration is greater outside the cell and low concentration inside. The movement of water is from inside the cell to outside the cell.
An <u>isotonic solution</u> where two solutions having the same concentration inside and outside of the cell so there is free movement of molecules across a semipermeable membrane.
Answer:
The correct option is: D. epiglottis
Explanation:
The epiglottis is a cartilaginous leaf-shaped structure of the larynx that is composed of elastic cartilage. It's shape is similar to the shape of the purslane leaf and is found in the throat of a human, <u>behind the tongue and the hyoid bone.</u>
It prevents the food from entering the trachea and is covered with the mucous membrane.The stem of epiglottis is attached to the thyroid cartilage.
The receptors located in the heart, aortic arch, and carotid sinuses that trigger autonomic reflexes in response to fluctuations in blood pressure are known as Baroreceptors.
Baroreceptors are present in the carotid sinus and the aortic arc and regulate the blood pressure levels in the body. Whenever blood pressure increases or decreases the stretch receptors present in the blood vessels send signals to the brain.
The brain interprets them and send signals to other parts of the body like kidney and heart. The kidney and heart releases enzyme like erythropoietin and atrial natriuretic factor respectively that regulate the blood pressure accordingly.
To know more about baroreceptors refer to the link below
https://brainly.in/question/33030396
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