Q. No.Read the following statement carefully:
"Further development of zygote depends on the type of life cycle the organism has and the environment it is exposed to."
Identify the correctly matched pair with respect to the above statement
1. Thick walled zygote
Haplontic life cycle
2. Zygote forms new generation, by mitosis, represented by one cell
Haplodiplontic life cycle
3. Zygote undergoes meiosis to form haploid generation
Diplontic life cycle
4. Zygote forms multicellular diploid generation
Haplontic life cycle
1. Thick walled zygote
Haplontic life cycle
2. Zygote forms new generation, by mitosis, represented by one cell
Haplodiplontic life cycle
3. Zygote undergoes meiosis to form haploid generation
Diplontic life cycle
4. Zygote forms multicellular diploid generation
Haplontic life cycle
From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
| 1. | Gymnosperms | 2. | Liverworts |
| 3. | Mosses | 4. | Pteridophytes |
Pinus seeds cannot germinate and establish without fungal association. This is because:
1. its seeds contain inhibitors that prevent germination.
2. its embryo is immature.
3. it has an obligate association with mycorrhizae.
4. it has a very hard seed coat.
1. Funaria and Ficus
2. Fern and Funaria
3. Funaria and Pinus
4. Ficus and Chlamydomonas
1. Curing high blood pressure
2. Kidney failure
3. Eye defect
4. Diabetes
In gymnosperms, the pollen chamber represents:
| 1. | a cell in the pollen grain in which the sperms are formed |
| 2. | a cavity in the ovule in which pollen grains are stored after pollination |
| 3. | an opening in the megagametophyte through which the pollen tube approaches the egg |
| 4. | the microsporangium in which pollen grain develop |
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