In what way do the sperm of mosses and ferns differ from those of the spermatophytes? (3)
4.2. What is the reason for the difference in structure of the sperm mentioned in QUESTION 1? (2)
4.3. Why do gymnosperms and grasses produce more pollen than the rest of the spermatophytes? (2)
4.4. How have the spermatophytes achieved total independence from water fro reproduction? (2)
4.5. Why has reducing the gametophyte generation been and advancement for the spermatophytes? (3)
4.6. Explain why most angiosperms are able to produce less pollen than gymnosperms​