Kingdom Plantae 3

Question 1

Gymnosperms are

Answer 1

Heterosporous

Question 2

Gymnosperms produce ______ microspores & megaspores

Answer 2

Haploid

Question 3

What are strobili/cones

Answer 3

Spores which are borne on sporophylls are arranged spirally along an axis to form lax\compact strobili\cones

Question 4

Strobili bearing microsporophylls and microsporangia are k/a

Answer 4

Microsporangiate/male strobili

Question 5

Pollen grain in gymnosperms

Answer 5

Microspore developed into a male gametophyte generation which is highly reduced & confined to only a limited number of cells.

Question 6

Cones bearing megasporophylls w\ ovules or megasporangia are called

Answer 6

Macrosporangiate/female strobili

Question 7

Male female cones are borne on same tree in

Answer 7

Pinus

Question 8

Male cones & megasporophylls are borne on different trees in

Answer 8

Cycas

Question 9

Megaspore mother cell is differentiated from one of the cell of

Answer 9

Nucellus

Question 10

Nucellus is protected by envelopes and composite structure called

Answer 10

Ovule

Question 11

Female cones

Answer 11

Ovule are borne on megasporophylls which is clustered to form female cones

Question 12

MMC divide meiotically to form

Answer 12

4 megaspores

Question 13

One of the megaspores enclosed within the megasporangium develops into multicellular

Answer 13

Female gametophyte

Question 14

In____ male & female gametophyte don’t have free existence

Answer 14

Gymnosperms

Question 15

Gymnosperms remain within the sporangia retain on the

Answer 15

Sporophyte

Question 16

Pollen grain in gymnosperms is released from the

Answer 16

Microsporangium

Question 17

Seeds are not covered in

Answer 17

Gymnosperms

Question 18

Smallest angiosperm

Answer 18

Wolffia

Question 19

Tallest angiosperm (100m)

Answer 19

Eucalyptus

Question 20

Female sex organ in angiosperm is

Answer 20

Pistil

Question 21

Haplontic life cycle has ________ as it’s dominant phase

Answer 21

Gametophyte

Question 22

Diplontic life cycle has ________ as it’s dominant phase

Answer 22

Sporophyte

Question 23

Sporophyte is

Answer 23

Diploid plant body

Question 24

Examples of organisms with haplontic life cycle

Answer 24

Volvox
Chlamydomonas
Spirogyra

Question 25

Examples of organisms with diplontic life cycle

Answer 25

Fucus

Question 26

Haplo diplontic life cycle is seen in

Answer 26

Bryophytes
Pteridophytes

Question 27

In haplo-diplontic condition both phases are

Answer 27

Multicellular

Question 28

Haplo diplontic life cycle in bryophyte

Answer 28

→Dominant is haploid gametophyte
→gametophyte alternates w\ sporophyte
→gametophyte is independent, photosynthetic, thalloid,erect phase
→sporophyte is multicellular, dependent on gametophyte for its anchorage and nutrition

Question 29

Haplo diplontic life cycle in pteridophytes

Answer 29

→dominant is diploid sporophyte
→it alternates w\ haploid gametophyte
→gametophyte is multicellular, saprophytic/autotrophic, independent, short lived
→sporophyte is independent, photosynthetic, vascular plant body

Question 30

Alga ploidy

Answer 30

Haplontic life cycle most
Diplontic life cycle fucus
Haplo diplontic life cycle ectocarpus, polysiphonia, kelps