1.) Plant body produces haploid spores by which of the following processes?
a) Mitosis
b) Meiosis
c)Fertilisation
d) Replication
2.) Individuals that are haploid (n) are known as:
a) Saprophytes
b) Gametophytes
c) Sporophytes
d) Neurophytes
3.) Which of the following is known as the process of alternation of haploid gametophytic phase and diploid sporophytic phase?
a) Alternation of generation
b) Alternation of gamete
c) Conception
d) Evolution
4.) Fern gametophytes are small and their appearance is like:
a) Kidney
b) Lungs
c) Heart
d) Brain
5.) In which of the following kind of life cycle can we see diploid sporophyte as the dominant photosynthetic phase?
a) Haplo-diplontic
b) Haplontic
c) Diplontic
d) None of the above
6.) Which of the following is NOT a characteristic of Sepal?
a)They modify into leaves
b) It encloses the flower after opening the flower.
c) It is generally green in colour.
d) None of these
7.) Which of the following is NOT an example of haplontic life cycle pattern?
a)Volvox
b)Spirogyra
c)Chlamydomonas
d)Fucus
8.) When pollen grains land on ……………………………………………………………………………………., then pollination takes place.
a) Stigma
b) Sepal
c) Lead
d) Petal.
9.) Which pattern of life cycle do all the seed-bearing plants like gymnosperms and angiosperms follow?
a) Diplontic
b) Haplontic
c) Haplo-diplontic
d) Triplontic
10.) Which of the following phase is dominant phase?
a) Saprophyte
b) Sporophyte
c) Gametophyte
d) Prothallus
11.) Which of the following is the correct statement regarding Diplontic pattern of life cycle?
a) The gametophytic phase is dominant
b) The sporophytic phase is not dominant
c) The sporophytic phase is dominant
d) The diploid gametophytic phase is dominant
12.) SMC stands for:
a) Single mobile cell
b) Single mother cell
c) Spore mother cell
d) Spore mobile cell
13.) Haplo-diplontic pattern of life cycle is exhibited by which of the following groups of living organisms?
a) Angiosperms
b) Pteridophyte
c) Gymnosperms
d) Fungus
14.) The cones of female gametophyte are usually …………………………………………………………………………………………..
a) Small
b) Triangular
c) Square
d) Large
15.) Which of the following is INCORRECTLY matched?
a)Spirogyra→ Haplontic
b)Polysiphonia→ Haplo-diplontic
c)Fucus→ Diplontic
d)Ectocarpus→ Haplontic
16.) Which is the Correct Statement from the following?
a)For the newly male gamete, development of pollen tube occurs.
b) To stop fertilization process, pollen tube is developed.
c) In the summer, large amount of pollen are released by the tree.
d) When male and female gametophyte are separated then their stage is diploid.
17.) Which of the following statements most appropriately defines the alternation of generation in plants?
a) The alternation between haploid and diploid plant generations
b) The alternation between tree and seed
c) The alternation between summer and winter adaptations
d) The alternation between different species of plants
18.) Each female cone bears:
a) Five pairs of ovules
b) Three pairs of ovules
c) Two pairs of ovules
d) A pairs of ovules
19.) What of the following kind of the plant body contain (n) set of chromosomes?
a) Diploid
b) Haploid
c) Triploid
d) Tetraploid
20.) A gametophyte of ……………………………………………………………………….. is a dominant gametophyte.
a)None of these
b) Ferns
c) Bothe Mosses and Ferns
d) Mosses
21.) Which of the following will be the ploidy of a zygote formed after fertilisation?
a) Haploid
b) Haplo-diploid
c) Diploid
d) Triploid
22.) In which of the following season the tree produces more pollen?
a) Summer
b) Rainy
c) Winter
d) Spring
23.) Most of the algal generations exhibit haplontic pattern of life cycle. Which of the following is an exception i.e., they do not exhibit haplontic life cycle?
a)Volvox
b)Chlamydomonas
c)Spirogyra
d)Ectocarpus
24.) Which of the following is a dominant generation in Bryophytes?
a) Haploid
b) Diploid
c) Triploid
d) All of them
25.) ………………………………………………………………………………….. in the diploid zygote results in the formation of haploid spores.
a) Meiosis
b) Mitosis
c) Cell division
d) Cell multiplication
26.) Which is the correct arrangement of the stages with a respect to alternation of generation.
a) Sporangium- formation of diploid spores by meiosis- haploid gametophyte- formation of diploid gamete-mature gametophyte.
b) Sporangium- formation of haploid spores by meiosis- haploid gametophyte- formation of diploid gametophyte- Mature gametophyte.
c)Sporangium- formation of Diploid spores by meiosis- haploid gametophyte- formation of haploid gametophyte- mature sporophyte
d)Sporangium- formation of haploid spores by meiosis- haploid gametophyte- formation of haploid gametes- mature sporophyte.
27.) Haplo-diplontic pattern of life cycle is NOT observed in which of the following plants?
a)Marchantia
b)Pteris
c)Pinus
d)Riccia
28.) Which of the following produces gametes in the gametophyte generation.
a) Anthrangia
b) Gametangia
c) Pollangia
d) Fernangia
29.) Which of the following statements is INCORRECT with respect to diplontic life cycle?
a)Bryophytes and pteridophytes exhibit this pattern of life cycle
b) Diploid sporophyte is the dominant phase
c) Gametophytic phase is represented as single to two celled
d)Fucus sp. represents this pattern
30.) Choose the INCORRECT pair from the following.
a) Petals- Attraction of pollinators
b) Stigma- Traps pollen
c) Anther- Encloses flower
d) Sepals- contain modified leaves
Answers:
1.)
Solution:(b) Meiosis
The plant body produces haploid spores by the process of reductional division also called as meiosis.
2.)
Solution:b) Gametophytes
Individuals that are diploid are known as Sporophytes and Individual that are haploid are known as Gametophyte.
3.)
Solution: (a) Alternation of generation
The alternation between the gamete producing haploid gametophyte and spore producing diploid sporophyte is known as the alternation of generation.
4.)
Solution:c) Heart
The fern gametophytes are small. And, they have heart-like shape.
5.)
Solution:(c) Diplontic
The plants in which the diploid sporophyte is the dominant photosynthetic phase, are known to have a diplontic kind of life cycle.
6.)
Solution:b) It encloses the flower after opening the flower.
It encloses the flower after opening the flower is not a characteristic of Sepal. Flower is enclosed by sepal before it opens.
7.)
Solution:(d) Fucus
Volvos, Spirogyra and Chlamydomonas are the examples which possess the haplontic pattern of life cycle.
8.)
Solution:a) Stigma
The wind or animal carries pollen grain to the stigma for the pollination.
9.)
Solution:(a) Diplontic
All the seed-bearing plants i.e., gymnosperms and angiosperms follow the diplontic pattern of life cycle.
10.)
Solution:b) Sporophyte
The sporophyte phase does not depend on the gametophyte phase. In the life cycle, this phase is the dominant phase.
11.)
Solution:(c) The sporophytic phase is dominant
In pteridophytes the main plant body or the dominant phase is a sporophyte which is differentiated into true root, stem and leaves. The sporophytes bear sporangia that are subtended by Sporophylls.
12.)
Solution:c) Spore mother cell
Meiosis takes place in Spore mother cell where it forms spore to form gametophyte again.
13.)
Solution:(b) Pteridophytes
The haplo-diplontic pattern of life cycle is usually exhibited by pteridophytes and bryophytes.
14.)
Solution:d) Large
Ovulate cones contain female gametophyte. These cones larger than male cones.
15.)
Solution:(d) Ectocarpus→ Haplontic
Ectocarpus although belonging to the algal phylum, exhibit haplo-diplontic pattern of life cycle.
16.)
Solution:a) For the newly male gamete, development of pollen tube occurs.
Pollen tube helps male gamete in reaching to the female gamete for the fertilization process. Eventually, it is developed for male gamete to reach female gamete and to fertilize the same.
17.)
Solution:(a) The alternation between haploid and diploid plant generations
The alternation of generation can be defined as the alternation between the haplontic gametophytic phase and diplontic sporophytic phase.
18.)
Solution:d) A pairs of ovules
There are many hard radiating scales are present on the female cone. Also, it bears a pair of ovules i.e. Sporangium and covering.
19.)
Solution:(b) Haploid
The plant body with (n) set of chromosomes are known as haploid.
20.
Solution:d) Mosses
The mosses contain a dominant gametophyte and the Ferns contain a dominant Sporophyte.
21.)
Solution:(c) Diploid
The zygote formed by the fusion of two haploid gametes possess two sets of chromosomes. Hence, they are diploid.
22.)
Solution:d) Spring
The trees produces large amount of large amount of pollen in the spring season.
23.)
Solution:(d) Ectocarpus
Most of the algae exhibit haplontic life cycle, but some like ectocarpus and polysiphonia exhinit haplo-diplontic life cycle.
24.)
Solution:a) Haploid
The alteration of generation occurs on the basis of plant type. The dominant generation in bryophytes is Haploid.
25.)
Solution:(a) Meiosis
Meiosis i.e., reductional division in the diploid zygote results in the formation of haploid spores.
26.)
Solution:d) Sporangium- formation of haploid spores by meiosis- haploid gametophyte- formation of haploid gametes- mature sporophyte
In the stages of Alternation of generation, Sporangium is a present in the diploid sporophyte. Then, meiosis process takes place to form haploid spores and spore forms gametophyte. Gametophyte forms haploid gametes by mitosis. In the end, fertilization occurs and haploid zygote gets formed. Later it becomes mature sporophyte.
27.)
Solution:(c) Pinus
Marchantia, Riccia and Pteris belong to bryophyte or pteridophytes and hence exhibit haplo-diplontic life cycle. While Pinus is a gymnosperm and hence has a diplontic life cycle.
28.)
Solution:b) Gametangia
Gametangia is responsible for producing gametes in the gametophyte generation. Later it transfers into environment.
29.)
Solution:(a) Bryophytes and pteridophytes exhibit this pattern of life cycle
Bryophytes and Pteridophytes exhibit haplo-diplontic pattern of life cycle.
30.)
Solution:c) Anther- Encloses flower
Anther-encloses flower is an INCORRECT pair because anther develops pollen grain and sepal encloses the flower before opening.