Are angiosperms heterosporous? As with gymnosperms, angiosperms areheterosporous. Therefore, they generate microspores, which will produce pollen grains as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes. ...
Indeed, Charles Darwin himself called the origin of the flowering plants an “abominable mystery.”What type of plant was the ancestor to the angiosperms? Most botanists now agree that the flowering plants are monophyletic in origin, meaning that they evolved from a common ancestor. Some ...
The number of flowering plants (angiosperms) was reduced at this time, but they then began to increase dramatically.What caused these changes? For many years scientists assumed that a cooling of the climate was responsible, with dinosaurs being particularly vulnerable because, like modern reptiles, ...
Engler and Prantl's system of classification was jointly published in monumental work Die Naturlichen pflanzenfamilien in 1892. It is the first phylogenetic system of classification which includes all the plants from algae to angiosperms arranged in an evolutionary sequence from simplicity to complexity...
C、Mosses, hornworts, liverworts, and ferns are nonvascular plants. D、Magnolia and its relatives, monocots, and eudicots are flowering plants (i.e., angiosperms). 点击查看答案 第3题 Which of the following statements about plastids is CORRECT? A、The chloroplast is one type of chromoplasts...
- Seed-producing plants include flowering plants (angiosperms) and cone-bearing plants (gymnosperms). 3. Examine Each Option: - Bryophytes: These are non-vascular plants like mosses and liverworts. They reproduce via spores and do not produce seeds. - Pteridophytes: This group includes ferns...
Genome size varies greatly across the flowering plants and has played an important role in shaping their evolution. It has been reported that many factors correlate with the variation in genome size, but few studies have systematically explored this at the genomic level. Here, we scan genomic ...
however, the role of the males as pollinators is unclear. Similar situation is evident for the interaction between males ofArhysoceble pictaandCuphea glutinosa(Lythraceae), where the males take nectar and may act as pollinators, like their females. We believe the plants are indirectly benefited...
Describe the differences seen in the alternation of generations between gymnosperms, angiosperms, and nonvascular plants. How did the classification system of plants and animals develop? What are the similarities and differences between fungi, plants and animals?...
Lanuage has two levels of structures, which are ___. A、syntactic level with sentences. B、primary level with words. C、secondary level with sounds. D、morphemic level with morphemes. 查看答案