B summons because it would be a subpoena because that is usually a witness and if a judge Summons someone to court then it’s usually a defendant
Answer:The eustachian tube is a canal that connects the middle ear to the nasopharynx, which consists of the upper throat and the back of the nasal cavity. It controls the pressure within the middle ear, making it equal with the air pressure outside the body.
Explanation:please give brainliest
Over the years, there have been numerous methods and products which were developed to do gene regulation. Be it through structural or chemical. One example is through prompting protein production of cells which help to control and limit the spread of cancer cells in health treatment.
Since sea urchins being deuterostomes, possess indeterminate cleavage, the separation of one cell from rest of the embryo will result in its growth into genetically identical embryo.
Deuterostomes are those species in which the formation of anus occurs before the formation of their mouth. The anus is formed from the blastopore in them. Deuterostome literally means second mouth. Example of such animals is: starfish, sea urchin, sea lily, sea cucumber, etc.
Indeterminate cleavage is the one where the cells of embryo possess the ability to give rise to complete embryo is they are separated from the actual embryo. Therefore, the cells are said to be totipotent.
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Photosynthesis requires a few main components. Mainly, Sunlight, Water and Carbon dioxide.
For this reaction, the reactants are
1) Water
2) Carbon dioxide
For water, it enters the cell by Osmosis. Water enters a cell through a partially permeable cell surface membrane.
When water enters a space through a partially permeable membrane from a high water potential to a low water potential, the process is called osmosis.
For carbon dioxide, it enters the cell through diffusion.
Diffusion involves particles moving from a region of higer concentration to a region of lower concentation. Therefore, the answer is Diffusion.
Extra knowledge:
Carbon dioxide dissolves into the thin film of moisture on the surface of the spongy mesophyll layer for easy transportation to the cells involved in photosynthesis.
