A) production of seed from ovules
B) lack of xylem tracheids
C) absence of pollen tubes
D) formation of endosperm before fertilization
Correct Answer: D
Solution :Conifers (gymnosperms) differ from grasses (angiosperms) in the formation of endosperm before fertilisation. In gymnosperms, as endosperm is formed before fertilisation, thus it is a haploid tissue. While in angiosperms endosperm is formed as a result of double fertilisation (triple fusion) and is a triploid tissue(3n). In both angiosperms and gymnosperms, the seeds are produced from ovules. Xylem trachieds and pollen tube formation are also common in both classes.
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