<span>Letter A is the answer. Almost all plant cells have single large central vacuole. These large central vacuoles of the plant cells are filled with water and can take over 80% of its cell volume. This is surrounded by a single membrane called tonoplast. The role of the central vacuole is maintaining the plant cell's pressure.</span>
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Endocrine glands release hormones (chemical messengers) into the bloodstream to be transported to various organs and tissues throughout the body. For instance, the pancreas secretes insulin, which allows the body to regulate levels of sugar in the blood.
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Cell A: sperm
Sex of Rabbit: Male
Offspring are not genetically identical because of the crossing over period in meiosis. Pieces of chromosomes switch places, producing genetically unique gametes/sex cells. Also, during fertilization, the offspring gets 1/2 its DNA from the mother and the other 1/2 from the father, so it will not be identical to either parent.
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