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Answer:
They are produced by the lacrimal glands above your eyes. They drain into tiny holes in the corners of your upper and lower eyelids before traveling through small channels, and down your tear ducts to your nose. Our tears taste salty because of electrolytes.
The correct answer is B) decreases; more difficult.
Unicellular organisms such as <em>Amoeba</em>, <em>Paramecium</em> depend on diffusion to move substances into and out of the cell. The surface area of unicellular organisms is large compared to its volume. Therefore, nutrients and other substances can easily cross the membrane and around their body.
As a cell's volume grows, its surface area/volume ratio <u>decreases</u>, making it <u>more difficult</u><u> </u>to acquire enough nutrients via diffusion.
Answer:
Aneuploidy refers to the change in chromosomal number 23, which can lead to genetic diseases.
Explanation:
Numerical abnormalities in sexual chromosomal abnormalities involve the loss or gain of a sex chromosome generating aneupliodes individuals. Generally, the loss of chromosomes has a greater impact on an individual than the gain, although this can also have serious consequences.
Within sexual aneuploidies we can distinguish the following:
· Sexual trisomies: it is a common disorder that is usually detected at puberty since there are no characteristic physical features in infants or children. Trisomies are those where an extra sex chromosome is evidenced
§ Klinefelter syndrome, XXY
§ Triple X syndrome, XXX (Called super female syndrome)
§ Double Y syndrome, XYY (called superman syndrome)
· Sexual monosomies: Cells that have lost a sex chromosome
§ Turner syndrome, XO
· Sex polysomies:
§ XXXY
§ XXXX
§ Other