12. The most abundant gymnosperm phylum today is A) Cycadophyta. B) Ginkgophyta.
ID: 39096 • Letter: 1
Question
12. The most abundant gymnosperm phylum today is
A) Cycadophyta. B) Ginkgophyta. C) Gnetophyta. D) Coniferophyta. E) None of the above
13. Coniferous gymnosperms, such as pines, depend primarily on __________ for pollination; thus, the plants produce large quantities of pollen that disperse over large areas during the spring. A) insects B) birds C) water D) wind E) mammals
14. An evolutionary trend that runs throughout the plant kingdom is that the sporophyte generation ___ and is more independent of the gametophyte, and the gametophyte generation _____ and is more dependent upon the sporophyte. A) becomes smaller, becomes smaller B) becomes larger, becomes smaller C) becomes smaller, becomes larger D) becomes larger, becomes larger E) does not change in size, becomes larger
15. Angiosperms differ from other plants in that two male gametes, contained within a single male gametophyte, participate in fertilization events. One sperm nucleus combines with the egg to produce a diploid zygote. The other sperm nucleus combines with two other haploid nuclei of the female gametophyte. This process is called A) biparental inheritance. B) multiple paternity. C) double fertilization. D) biparental fertilization. E) multiple fertilization.
Explanation / Answer
12.D) Coniferophyta
13.D) wind
14)B) becomes larger, becomes smaller
15)C) double fertilization.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.