Answer:
they have thin membranes to allow diffusion of substance for short distance
they are numerous to increase the surface area of absorption
hope this helps
Answer:
Pupillary light reflex refers to the contraction that the pupils present when they light up. In cases of injury to the optic nerve, when the eye where the injured optic nerve is illuminated, since it cannot conduct the stimulus to the brain, neither pupil closes.
Explanation:
Pupillary light reflex refers to the reaction that causes the pupil to close with light thanks to the contraction of the sphincter of the pupil and to open in the dark thanks to the relaxation of that muscle by not receiving any stimulus. A light stimulus reaches the eye and in the retina it is transformed, through a chemical reaction, into an electrical stimulus that will be transmitted through the optic nerve and the visual pathways to the brain. The visual cells of the retina, rods and cones, also act as light receptors that control the pupil's motor activity. Thus, pupil-motor thresholds to light follow the same spectral sensitivity deviations as visual thresholds, which are a function of the state of light adaptation of the retina.
It is possible to predict that because of the decreased number of cone cells, cats have poor color vision.
<h3>What are cone cells?</h3>
Cone cells are specialized cells in the eye required to produce the spectra of color observed in nature.
Cone cells can be considered photoreceptors located in the retina of the eye (in animals and humans).
Cone cells act in the best way in bright light conditions, conversely to rod cells that serve to observe at the night.
Learn more about cone cells here:
brainly.com/question/13942524
<u>Answer:</u>
<u>Haploid cells join to form an organism that has a complete set of chromosomes is the correct answer.</u>
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<u>Explanation:</u>
<u>In the fertilization process two haploid cells sperm fuse with an egg which results in the formation of a diploid cell.</u>
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<u>meiosis produces haploid cells rather than diploid cells because in Meiosis the chromosome number gets reduced.</u>
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<u>In the Meiosis process the number of chromosomes in the daughter cells gets reduced to half than of the parent cell and this process results in the formation of four haploid daughter cells</u>
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<u>So Haploid cells join to form an organism that has a complete set of chromosomes is the correct answer.</u>
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