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Which of the following is necessary for a generative cell in a pollen grain to produce two sperm cells?
Q7: Use the model of circulation in the
Q10: The opening of stomata involves which of
Q17: The following question is based on the
Q20: Which of the following organs is correctly
Q21: Which of the following animals uses the
Q41: Which of the following genetic processes may
Q47: Consuming alcohol results in increased urine excretion
Q49: What would enhance water uptake by a
Q52: Which one of the following statements is
Q57: Which of the following occurs under stressful