41.Name the three phases in the life span of an organism.
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42.Why do internodal segments of sugarcane fail to propagate vegetatively even when they are in contact with damp soil ?
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43.Define (i) Juvenile phase (ii) Reproductive phase (iii) Senescent phase.
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44.Explain the process of budding in yeast.
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45.
Differentiate between a zoospore and a zygote. Or
What is zoospore ?
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46.
How does Bryophyllum plant propagate? Or
Why do the new plants grow on Bryophyllum leaf ?
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47. Define external fertilization. Mention its disadvantages.
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48.
Higher organisms have resorted to sexual reproduction inspite of its complexity. Why ?
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Short Answer Type
49.
What is a bisexual flower ? Collect five bisexual flowers from your neighbourhood and with the help of your teacher find out their common and scientific names.
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50.What are oviparous and viviparous animals ? Give one example of each.
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