Conifers differ from grasses in the

Explanation

a. Conifers belong to gymnosperms. They are seed bearing plants in which the sporophylls are aggregated to form cones and the seeds develop in exposed state over the surface of megasporophylls. Vascular strand consists of tracheids and sieve cells. Female gametophyte forms archegonia, provides nourishment to developing embryo and later gets transformed into food­laden tissue or endosperm inside the seed. This endosperm is formed before fertilization so it is haploid in nature. It provides nourishment for growth of seedlings at the time of seed germination. Grass is an angiospermic plant and endosperm is produced after fertilization. In conifers, endosperm formation occurs before fertilization, whereas in many angiosperms like grasses, endosperm is formed after fertilization. This is a significant difference in their reproductive processes. b. This statement is true for both conifers and grasses. Seeds are produced from ovules in both groups. c. This is not a correct difference. Both conifers and grasses have xylem tracheids. Xylem tracheids are a characteristic feature of gymnosperms, which include conifers, as well as angiosperms, which include grasses. d. This is not an accurate difference either. Both conifers and grasses have pollen tubes as part of their reproductive processes.