Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms
Top questions
See all →- Which one of the following is the characteristic feature of gymnosperms? Answer: 2. Seeds are naked. Key idea: Gymnos means naked. In gymnosperms the ovules are not enclosed in an ovary, so the seeds are naked. Fr... 1
- Match List I with List II.List I: A. Pteridophyte B. Bryophyte C. Angiosperm D. GymnospermList II: I. Salvia II. Ginkgo III. Polytrichum IV. SalviniaChoose the option with all correct matches. Answer: 2. A-IV, B-III, C-I, D-II Key idea: Identify each plant group. Pteridophyte: Salvinia (A-IV). Bryophyte: Polytrichum, a moss (B-III)... 1
- In bryophytes, the gemmae help in which one of the following? Answer: 2. Asexual reproduction Key idea: Gemmae are green multicellular buds in cups on the thallus of liverworts such as Marchantia. They... 1
- The correct sequence of events in the life cycle of bryophytes isA. Fusion of antherozoid with egg.B. Attachment of gametophyte to substratum.C. Reduction division to produce haploid spores.D. Formation of sporophyte.E. Release of antherozoids into w… Answer: 3. B, E, A, D, C Key idea: In bryophytes, the gametophyte is dominant and the sporophyte depends on it. B: gametophyte attaches to t... 1
- Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence.A. Prothallus stageB. Meiosis in spore mother cellsC. FertilisationD. Formation of archegonia and antheridia in gametophyte.E. Transfe… Answer: 1. B, A, D, E, C Key idea: In pteridophytes the dominant sporophyte makes spores by meiosis, which grow into the gametophyte. B: mei... 1
- Read the following statements and choose the set of correct statements:In the members of Phaeophyceae,A. Asexual reproduction occurs usually by biflagellate zoospores.B. Sexual reproduction is by oogamous method only.C. Stored food is in the form of… Answer: 4. A, C, D and E only Key idea: check each statement about brown algae. A true: asexual reproduction by biflagellate zoospores. B fa... 1