Life Cycle of Gymnosperms

Q.

What are the different types of ovules?

Q. In organisms with haplontic life cycle, the zygote divides by

1. mitosis to form haploid spores.
2. meiosis to form gametes.
3. mitosis to form gametes.
4. meiosis to form haploid spores.

Q.

Give an example of plants with

(a) haplontic life cycle

(b) diplontic life cycle

(c) haplo diplontic life cycle

Q.

What is the meaning of heterophylly?

Q. Pteridophytes differ from mosses/bryophytes in possessing:

1. Independent gametophyte
2. Well developed vascular system
3. Archegonia
4. Flagellate spermatozoids

Q.

Retention of the female gametophyte with a growing young embryo on the parent sporophyte for a period of time is first recognized in evolutionary terms in

1. Gymnosperms

2. Liverworts

3. Mossess

4. Pteridophytes

Q. The sporophyte is a dominant phase in

1. all land plants
2. all spermatophytes only
3. all spermatophytes and pteridophytes
4. all vascular cryptogams only

Q.

What is a non-flowering plant called ?

Q.

Megasporangium is equivalent to?

1. Fruit

2. Embryo sac

3. Nucellus

4. Ovule

Q. In both bryophytes and pteridophytes, the gametophyte is the free living generation.

1. True
2. False

Q.

Is horsetails a gymnosperm?

Q. The gametophyte generation in Cycas is found inside the

1. flowers
2. cones
3. cotyledons
4. embryo

Q.

Which is dominant: gametophyte or sporophyte?

Q. In which of the following plants, the dipoid stage generally dominates?

1. Fern
2. Mosses
3. Fungi
4. Algae

Q.

With reference to different types of life cycles, which of the following statements is correct?

1. In different life cycles, there is an alternation of generations between gamete producing sporophyte and spore producing gametophyte

2. In haplontic life cycle, meiosis takes place during zygote germination

3. All seed — bearing plants follow haplo-diplontic type of life cycle

4. In diplontic life cycle, spores develop into sporophytes

Q. The alternation of gametophytic generation from a sporophytic generation occurs as a result of

1. mitosis
2. meiosis
3. oogamy
4. isogamy

Q.

Gametophyte dependent on sporophyte is found in

1. Polytrichum

2. Pteris

3. Marchantia

4. Hibiscus

Q. Non flowering plants producing seeds have

1. reduced sporophyte
2. equally dominant sporophyte and gametophyte
3. dominant gametophyte
4. reduced gametophyte

Q.

Which is/are gametophytes in Pinus?

1. Zygote

2. Male and female cones

3. Micro and megaspore

4. Pinus and plant

Q. Name the characters in which seed plants differ from pteridophytes.​

Q. In organisms with haplontic life cycle, the zygote divides by

1. mitosis to form haploid spores.
2. meiosis to form gametes.
3. mitosis to form gametes.
4. meiosis to form haploid spores.

Q.

What part of the gymnosperm life cycle is the male gametophyte?

Q. In which of the following gametophyte is not independent free living?

1. Pinus
2. Marchantia
3. Funaria
4. Pteris

Q. Gymnosperm, and angiosperm is diplontic in life cycle.Then why Gametophyte is dominant phase in gymnosperm

Q. Identify the labels A, B, C and D in the figure given below.

1. A - Sporophyte; B - Meiosis;
   C - Gametogenesis; D - Endosperm
2. A - Sporophyte; B - Mitosis;
   C - Gametogenesis; D - Zygote
3. A - Gametophyte; B - Meiosis;
   C - Gametogenesis; D - Zygote
4. A - Sporophyte; B - Meiosis;
   C - Gametogenesis; D - Zygote

Q. Choose the correct answers from the alternatives given.
In which one of the following plants sporophyte is completely dependent on gametophyte?

1. Riccia
2. Funaria
3. Angiosperms
4. Gymnosperms

Q. Adult sporophyte and gametophyte are both free living in a

1. Moss
2. Fern
3. Fungus
4. Conifer

Q. Cycas is classified as a gymnosperms due to its

1. Motile sperms
2. Fruit formation
3. Naked ovule
4. Phycnoxylic wood

Q. The gametophyte generation in Cycas is found inside the

1. flowers
2. cones
3. cotyledons
4. embryo

Q. The main plant body of Pteridophytes is

1. Gametophyte
2. Sporophyte
3. None of the above
4. Haploid