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Biology
Plant Anatomy And Physiology
Difficulty: Medium
Consider the following statements regarding malacophyllous xerophytes and choose the correct answer: 1. Malacophyllous xerophytes are characterised by reduced stem and succulent leaves 2. Succulent leaves are usually large in size and are often more or less circular in shape 3. Succulent leaves possess prominent water storage tissue consisting of thin-walled parenchymatous cells 4. The amount of chlorophyll gradually increases from periphery to the centre in the leave
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Consider the following statements regarding double fertilization and choose the correct answer: 1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball 2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg 3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei 4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo