Mix Examples- Plant Kingdom Questions in English

(B) Marchantia is a genus of liverworts,which belongs to the group $Bryophytes$.
Marsilea is a genus of water ferns,which belongs to the group $Pteridophytes$.
Therefore,Marchantia and Marsilea are examples of $Bryophytes$ and $Pteridophytes$,respectively.

(D) The correct answer is $Parmelia$.
$Araucaria$,$Conifer$,and $Pinus$ are all examples of Gymnosperms,which are seed-bearing vascular plants.
$Parmelia$ is a genus of foliose lichens,which is a symbiotic association between a fungus and an alga or cyanobacterium.
Therefore,$Parmelia$ does not belong to the group of Gymnosperms.

(D) The correct answer is $D$.
$1$. $Parmelia$ is a type of lichen.
$2$. $Marchantia$ is a liverwort, which belongs to the group Bryophyta.
$3$. $Marsilea$ is a fern, which belongs to the group Pteridophyta.
$4$. $Sargassum$ is a brown alga (Phaeophyceae), not a mold. Molds are fungi, whereas $Sargassum$ is a photosynthetic protist/alga. Therefore, the pair $Sargassum - \text{Mold}$ is mismatched.

(D) In Bentham and Hooker's classification system for Polypetalae:
$1$. Series Thalamiflorae consists of $6$ cohorts.
$2$. Series Disciflorae consists of $4$ cohorts.
$3$. Series Calyciflorae consists of $5$ cohorts.
$4$. Series Inferae consists of $3$ cohorts.
$5$. Series Bicarpellatae (under Gamopetalae) consists of $4$ cohorts.
Therefore,the pair 'Series Bicarpellatae - $5$ Cohorts' is incorrect because it actually contains $4$ cohorts.

(B) Both Bryophytes and Pteridophytes possess multicellular reproductive organs (antheridia and archegonia) that are protected by a sterile jacket of cells. This is a significant evolutionary adaptation to protect the developing gametes from desiccation. Option $A$ is incorrect because in Bryophytes,the sporophyte is dependent on the gametophyte. Option $C$ is incorrect because the sporophyte is dominant only in Pteridophytes,not in Bryophytes. Option $D$ is incorrect because the gametophyte in Pteridophytes is usually a small,independent prothallus,not necessarily thalloid.

(C) George Bentham and Joseph Dalton Hooker are renowned for their monumental work, 'Genera Plantarum', which provides a comprehensive and natural system of classification for seed plants. Their system is widely used in herbaria across the world due to its detailed and practical approach to plant taxonomy.

(B) Plants that reproduce through spores and do not produce seeds or flowers are collectively known as $Cryptogamae$.
$Cryptogamae$ includes $Thallophyta$,$Bryophyta$,and $Pteridophyta$.
Mosses belong to $Bryophyta$ and ferns belong to $Pteridophyta$.
Since both groups reproduce via spores and lack seeds,they are classified under the group $Cryptogamae$.

(D) : $Mucor$ is a member of $Zygomycetes$ (the conjugation fungi) in which motile cells,e.g.,zoospores or planogametes,are absent.
Asexual reproduction takes place by the formation of non-motile mitospores called sporangiospores.
Sexual reproduction takes place by the formation of non-motile zygospores.
Therefore,the statement that $Mucor$ has biflagellate zoospores is incorrect.

(D) $Pinus$ is a monoecious plant,$i.e.$,in $Pinus$ the male and female cones or strobili are borne on the same plant. Therefore,the option $Pinus-Dioecious$ is a mismatch.

(B) $Ectocarpus$ exhibits a haplodiplontic life cycle,where both haploid and diploid phases are multicellular and often free-living.
$Fucus$ exhibits a diplontic life cycle,where the diploid sporophyte is the dominant,photosynthetic phase,and the gametophytic phase is represented by single to few-celled gametophytes.

(A) : $Sequoia \text{ } sempervirens$ is the tallest gymnosperm.
$B$: The leaves of gymnosperms are well adapted to extremes of climate (e.g., needle-like leaves, thick cuticle, and sunken stomata), which helps them survive in harsh conditions.
$C$: Gymnosperms are heterosporous, meaning they produce two different kinds of spores: microspores and megaspores.
$D$: $Salvinia$ is an aquatic pteridophyte, not a gymnosperm. $Ginkgo$ and $Pinus$ are gymnosperms.

(B) The correct answer is $B$.
In bryophytes and pteridophytes,the male gametes (antherozoids) are flagellated and motile.
They require an external medium,specifically water,to swim and reach the female reproductive organ,the archegonium,for fertilization.
Therefore,water is essential for the transport of male gametes in these plant groups.

(A) Statement $A$ is correct: Lichens and mosses are pioneer species in primary succession on bare rocks.
Statement $B$ is incorrect: $Selaginella$ is a heterosporous pteridophyte,not homosporous.
Statement $C$ is incorrect: Coralloid roots in $Cycas$ contain nitrogen-fixing cyanobacteria (like $Nostoc$ or $Anabaena$),not $VAM$ (Vesicular Arbuscular Mycorrhiza),which is a fungal association.
Statement $D$ is correct: In bryophytes,the dominant phase is the gametophyte,while in pteridophytes,the dominant phase is the sporophyte.
Statement $E$ is correct: In gymnosperms,the male and female gametophytes do not have an independent free-living existence; they remain within the sporangia retained on the sporophytes.
Therefore,statements $A, D,$ and $E$ are correct.

(A) Let us analyze each statement:
$(A)$ In liverworts,mosses,and ferns,the gametophyte is the independent,free-living stage. This statement is correct.
$(B)$ All gymnosperms are heterosporous,and some ferns (like Salvinia and Selaginella) are also heterosporous. This statement is correct.
$(C)$ Sexual reproduction in $Fucus$ (alga),$Volvox$ (alga),and $Albugo$ (fungus) is oogamous. This statement is correct.
$(D)$ The sporophyte in mosses is more elaborate than that in liverworts. Liverwort sporophytes are simpler (e.g.,in $Riccia$),whereas moss sporophytes have a foot,seta,and capsule. This statement is incorrect.
$(E)$ $Pinus$ is monoecious (male and female cones on the same plant),while $Marchantia$ is dioecious. This statement is incorrect.
Thus,statements $(A)$,$(B)$,and $(C)$ are correct. The total number of correct statements is $3$.

(A) The correct answer is $A$.
$Funaria$ belongs to $Bryophyta$,$Dryopteris$ belongs to $Pteridophyta$,and $Ginkgo$ belongs to $Gymnosperms$.
All these three groups share the presence of the female sex organ known as the archegonium.
$Funaria$ lacks well-developed vascular tissues and an independent sporophyte.
$Ginkgo$ does not have an independent gametophyte,as it is dependent on the sporophyte.

(A) : In $Spirogyra$,gametes are non-motile and sexual reproduction takes place by conjugation.
$Sargassum$ belongs to the $Phaeophyceae$ group of algae. They are commonly called 'brown algae' and contain photosynthetic pigments chlorophyll $a$ and $c$.
Puffballs are $Basidiomycetes$ with a stalked rounded structure that releases puffs of spores,e.g.,$Lycoperdon$ $oblongisporum$.
$Nostoc$ is a colonial cyanobacterium. It enriches its habitat with nitrogen by fixing atmospheric nitrogen and also causes water blooms.

(D) : Multicellular fungi,filamentous algae,and the protonema of mosses all share the ability to reproduce vegetatively through fragmentation.
$1$. Fungi belong to Kingdom Fungi,while algae and mosses belong to Kingdom Plantae.
$2$. Mosses exhibit a haplodiplontic life cycle,whereas fungi and algae show diverse life cycles.
$3$. Algae and mosses are autotrophic,whereas fungi are heterotrophic.
$4$. Fragmentation is a common method of asexual reproduction in these organisms,allowing them to spread and colonize new areas.

(B) $Cycas$ is a gymnosperm and $Adiantum$ is a pteridophyte.
$Cambium$ and seeds are absent in pteridophytes,while vessels are absent in both of these two groups.
Both $Cycas$ and $Adiantum$ resemble each other in having multi-ciliated motile sperms.

(B) The correct answer is $B$.
$1$. $Ginkgo$ is a gymnosperm,and gymnosperms produce archegonia in their female gametophyte. This is correctly matched.
$2$. $Salvinia$ is a heterosporous pteridophyte. Pteridophytes produce a prothallus,but heterosporous pteridophytes like $Salvinia$ produce reduced gametophytes that do not form a typical independent prothallus structure. Thus,this is wrongly matched.
$3$. $Viroids$ are infectious agents consisting only of a short strand of circular single-stranded $RNA$. This is correctly matched.
$4$. $Mustard$ is an angiosperm. In angiosperms,the embryo sac contains synergids. This is correctly matched.

$(A)$ Incorrect: In $Equisetum$, the gametophyte is free-living and photosynthetic.
$(B)$ Correct: In $Ginkgo$ (a gymnosperm), the male gametophyte is highly reduced and not independent.
$(C)$ Incorrect: $Riccia$ is a liverwort with a simple sporophyte, while $Polytrichum$ is a moss with a more complex and differentiated sporophyte.
$(D)$ Incorrect: $Volvox$ exhibits oogamous sexual reproduction.
$(E)$ Incorrect: The spores of slime moulds possess true cell walls made of cellulose, which makes them highly resistant to adverse conditions.
Therefore, only statement $(B)$ is correct. Hence, the correct answer is $One$.

(B) Statement $A$ is incorrect because the sporophyte in mosses is more elaborate than that in liverworts.
Statement $B$ is correct because Salvinia is a heterosporous pteridophyte.
Statement $C$ is correct because all seed-bearing plants (gymnosperms and angiosperms) exhibit a diplontic life cycle.
Statement $D$ is incorrect because Pinus is monoecious,meaning male and female cones are borne on the same tree.
Therefore,statements $A$ and $D$ are the two incorrect statements.

(C) : Monoecious plants are those that bear both male and female reproductive structures on the same individual plant.
In the case of $Pinus$, both male and female cones (strobili) are produced on the same tree, making it a monoecious plant.
In contrast, $Marchantia$ is dioecious (male and female thalli are separate), and both $Cycas$ and $Date \text{ } palm$ are dioecious, meaning male and female reproductive structures are found on separate plants.

(C) Based on the provided figures:
$A$ represents $Selaginella$,which is a pteridophyte.
$B$ represents $Equisetum$,which is a pteridophyte.
$C$ represents $Salvinia$,which is a heterosporous pteridophyte.
$D$ represents $Ginkgo$,which is a gymnosperm.
Therefore,the correct identification is given in option $C$.

(A) : Monoecious plants have separate male and female reproductive structures on the same individual plant.
$Pinus$ is a monoecious gymnosperm because it bears both male and female cones (strobili) on the same tree.
In contrast,$Cycas$ is dioecious (separate male and female plants),$Papaya$ is typically dioecious,and $Marchantia$ is a dioecious bryophyte.

(C) The correct answer is $C$.
Flagellated male gametes (antherozoids) are typically found in lower plant groups such as algae,bryophytes,and pteridophytes,where water is required for fertilization.
In the set $Riccia$,$Dryopteris$,and $Cycas$:
$1$. $Riccia$ is a bryophyte that produces biflagellate antherozoids.
$2$. $Dryopteris$ is a pteridophyte that produces multiflagellate antherozoids.
$3$. $Cycas$ is a gymnosperm that produces large,multiciliated (flagellated) male gametes.
Other options contain plants like $Spirogyra$ (non-flagellated gametes) or $Calotropis$ (angiosperm,non-flagellated pollen tubes),making them incorrect.

(D) The correct answer is $D$.
Bordeaux mixture was discovered by $R.M.A. Millardet$ in $1882$ as the first inorganic fungicide.
It was specifically developed to control the downy mildew disease of grapes caused by the pathogen $Plasmopara$ $viticola$.
This mixture is composed of copper sulphate, lime, and water.

(D) In $Algae$,$Bryophytes$,and $Pteridophytes$,the male gametes are motile and require a liquid medium to reach the female gametes for fertilization.
Water acts as the essential medium for the transport of these male gametes to the female gametes.
Therefore,the correct option is $D$.

(D) In $Bryophytes$,the main plant body is a haploid gametophyte,which is the dominant phase of the life cycle.
In $Pteridophytes$,the main plant body is a diploid sporophyte. The gametophyte (prothallus) is small,multicellular,free-living,usually photosynthetic,short-lived,and haploid.
Therefore,both statements $A$ and $B$ are correct.

(A) To identify the correct pair,let's analyze each group:
$1$. Gymnosperms are plants with naked seeds,such as $Pinus$ $(r)$.
$2$. Angiosperms are flowering plants,such as $Eucalyptus$ $(s)$.
$3$. Bryophytes are non-vascular land plants,such as $Sphagnum$ $(p)$.
$4$. Pteridophytes are vascular cryptogams,such as $Selaginella$ $(q)$.
Matching these gives: $(1-r), (2-s), (3-p), (4-q)$.

(D) To arrange the organisms from simple to complex,we look at their evolutionary classification:
$(1)$ $Chlamydomonas$ is a unicellular green alga,which is the simplest among the given options.
$(2)$ $Sphagnum$ is a moss,which belongs to Bryophyta. Bryophytes are more complex than algae as they show differentiation into stem-like and leaf-like structures.
$(3)$ $Equisetum$ is a horsetail,which belongs to Pteridophyta. Pteridophytes are more complex than bryophytes as they possess true roots,stems,and leaves,along with a well-developed vascular system.
Therefore,the order from simple to complex is: $Chlamydomonas$ $(2) < Sphagnum$ $(3) < Equisetum$ $(1)$.
The correct sequence is $(2), (3), (1)$.

(A) The correct matching is as follows:
$(i)$ Red algae: These contain the red pigment $r$-phycoerythrin in their body. Thus,$(i)$ matches with $(S)$.
$(ii)$ Green algae: These contain pyrenoids,which are storage bodies that contain protein besides starch. Thus,$(ii)$ matches with $(R)$.
$(iii)$ Bryophytes: These possess root-like structures called rhizoids,which are not true roots. Thus,$(iii)$ matches with $(Q)$.
$(iv)$ Pteridophytes: The gametophyte of pteridophytes is a small,multicellular,free-living,photosynthetic thallus called a prothallus. Thus,$(iv)$ matches with $(P)$.
Therefore,the correct sequence is $(i-S, ii-R, iii-Q, iv-P)$,which corresponds to option $(A)$.

(C) $1$. Phaeophyceae (Brown algae) includes examples like $Ectocarpus$,$Dictyota$,$Laminaria$,$Sargassum$,and $Fucus$. Thus,$1-D$.
$2$. Chlorophyceae (Green algae) includes examples like $Chlamydomonas$,$Volvox$,$Ulothrix$,$Spirogyra$,and $Chara$. Thus,$2-A$.
$3$. Rhodophyceae (Red algae) includes examples like $Polysiphonia$,$Porphyra$,$Gracilaria$,and $Gelidium$. Thus,$3-C$.
$4$. Angiosperms (Flowering plants) include examples like $Wolffia$ (the smallest angiosperm). Thus,$4-B$.
Therefore,the correct matching is $(1-D), (2-A), (3-C), (4-B)$.

(D) In bryophytes,the gametophyte is the dominant,independent,and photosynthetic phase of the life cycle. It is relatively large and complex.
In contrast,vascular plants (such as pteridophytes,gymnosperms,and angiosperms) show a shift toward a sporophyte-dominant life cycle.
As a result,the gametophytes of vascular plants are significantly reduced in size compared to those of bryophytes.
Furthermore,the sex organs (antheridia and archegonia) in vascular plants are also smaller and often simplified compared to the more prominent sex organs found in bryophytes.

(B) Let us analyze each statement:
$(a)$ The sporophyte in liverworts is simpler than that in mosses. Mosses have a more elaborate sporophyte consisting of a foot,seta,and capsule. Thus,statement $(a)$ is wrong.
$(b)$ $Salvinia$ is a pteridophyte that produces two types of spores (microspores and megaspores),making it heterosporous. Thus,statement $(b)$ is correct.
$(c)$ All seed-bearing plants (gymnosperms and angiosperms) exhibit a diplontic life cycle,where the diploid sporophyte is the dominant phase. Thus,statement $(c)$ is correct.
$(d)$ $Pinus$ is monoecious,meaning male and female cones are borne on the same tree. Thus,statement $(d)$ is wrong.
Since statements $(a)$ and $(d)$ are wrong,the correct option is $B$.

(A) Seeds are characteristic features of Spermatophytes (Gymnosperms and Angiosperms).
$1$. $Funaria$ is a bryophyte,which reproduces via spores and does not produce seeds.
$2$. $Nephrolepis$ is a pteridophyte,which also reproduces via spores and does not produce seeds.
$3$. $Maize$ is an angiosperm,which produces seeds.
$4$. $Sunflower$ is an angiosperm,which produces seeds.
$5$. $Zamia$ is a gymnosperm,which produces seeds.
Therefore,both $Nephrolepis$ and $Funaria$ do not form seeds.

(B) The common feature among Bryophytes,Dryopteris (a Pteridophyte),and Ginkgo (a Gymnosperm) is the presence of archegonia.
$1$. Bryophytes: They possess archegonia as the female sex organ.
$2$. Dryopteris (Pteridophytes): They also possess archegonia.
$3$. Ginkgo (Gymnosperms): They possess archegonia,although they are reduced in higher gymnosperms.
- Independent sporophyte is not present in Bryophytes.
- Well-developed vascular tissues are absent in Bryophytes.
- Independent gametophyte is not present in Ginkgo.

(B) Let us analyze each statement:
$(1)$ In liverworts,mosses,and ferns,the gametophyte is the dominant,free-living phase. This statement is correct.
$(2)$ All gymnosperms are heterosporous,and some ferns (like $Salvinia$ and $Selaginella$) are heterosporous. This statement is correct.
$(3)$ Sexual reproduction in $Fucus$ (algae),$Volvox$ (algae),and $Albugo$ (fungi) is oogamous. This statement is correct.
$(4)$ The sporophyte in mosses is more elaborate than that in liverworts (which is simple and consists of a foot,seta,and capsule). This statement is incorrect.
$(5)$ $Pinus$ is monoecious (male and female cones on the same plant),while $Marchantia$ is dioecious. This statement is incorrect.
Thus,statements $(1)$,$(2)$,and $(3)$ are correct. The total number of correct statements is $3$.

(D) Fertilization in bryophytes and pteridophytes is dependent on water. In $Pteris$ (a pteridophyte),the archegonium secretes specific chemical substances (chemotaxis) that attract the male gametes (antherozoids) of its own species. This is a specific biological mechanism where the female sex organ recognizes and attracts only the compatible male gametes through chemical signaling. Therefore,even if $Funaria$ sperms are present,they are not attracted to the $Pteris$ archegonium.

(D) $Funaria$ is a bryophyte,while $Selaginella$ is a pteridophyte.
$Funaria$ lacks true roots and instead possesses rhizoids.
In contrast,$Selaginella$ possesses true roots,stems,and leaves.
Therefore,'roots' are not common between the two.

(D) The evolutionary sequence of plants from simple to complex is: Algae $(Chlamydomonas)$ $\rightarrow$ Bryophytes $(Funaria)$ $\rightarrow$ Pteridophytes $(Selaginella)$ $\rightarrow$ Gymnosperms $(Pinus)$.
$Chlamydomonas$ is a unicellular green alga (simplest).
$Funaria$ is a moss (bryophyte),which is more complex than algae.
$Selaginella$ is a pteridophyte,which has vascular tissues.
$Pinus$ is a gymnosperm,which produces seeds and is the most advanced among the given options.

(C) The archegonium is the female sex organ in Bryophytes,Pteridophytes,and Gymnosperms.
In Bryophytes and Pteridophytes,the archegonium typically has a neck with a variable number of neck canal cells.
Specifically,in many Pteridophytes and Gymnosperms,the neck region of the archegonium is characterized by the presence of $4-6$ rows of neck canal cells.
Therefore,this feature is commonly observed in both Pteridophytes and Gymnosperms.

(B) The group $Spermatophyta$ (seed-bearing plants) includes both $Gymnosperms$ and $Angiosperms$.
$Ginkgo$ is a $Gymnosperm$ and $Pisum$ (pea) is an $Angiosperm$.
Both are seed-bearing plants,thus they belong to the $Spermatophyta$ group.
$Rhizopus$ is a fungus,$Pinus$ and $Cycas$ are $Gymnosperms$,and $Acacia$ and $Saccharum$ are $Angiosperms$. However,the pair $Ginkgo$ and $Pisum$ represents the diversity within the $Spermatophyta$ group effectively.

(C) Seed formation is a characteristic feature of Spermatophytes (Gymnosperms and Angiosperms).
$1$. $Chlamydomonas$ is an Alga,$Funaria$ is a Bryophyte,and $Dryopteris$ (Fern) is a Pteridophyte. None of these produce seeds.
$2$. $Ficus$ (Angiosperm),$Punica$ (Angiosperm),and $Pinus$ (Gymnosperm) are seed-bearing plants.
$3$. In option $C$,$Dryopteris$ (Pteridophyte) and $Funaria$ (Bryophyte) both reproduce via spores and do not form seeds.
Therefore,the correct pair is $Dryopteris$ and $Funaria$.

(A) The correct matching is as follows:
$(a)$ Peritrichous flagellation: Found in bacteria like $Escherichia \ coli$ ($E$. coli),where flagella are distributed over the entire surface of the cell. Thus,$(a-3)$.
$(b)$ Living fossil: $Ginkgo \ biloba$ is a classic example of a living fossil among gymnosperms. Thus,$(b-1)$.
$(c)$ Rhizophore: $A$ specialized structure found in the pteridophyte $Selaginella$ that produces roots. Thus,$(c-4)$.
$(d)$ Smallest flowering plant: $Wolffia$ is known as the smallest angiosperm. Thus,$(d-5)$.
$(e)$ Largest perennial alga: $Macrocystis$ (a brown alga or kelp) can grow to massive sizes. Thus,$(e-2)$.
Therefore,the correct sequence is $a-3, b-1, c-4, d-5, e-2$.

(D) Flagellated male gametes (antherozoids) are typically found in groups that require water for fertilization,such as Bryophytes,Pteridophytes,and some Gymnosperms.
$1$. $Riccia$ is a Bryophyte,which produces flagellated antherozoids.
$2$. $Dryopteris$ is a Pteridophyte,which also produces flagellated antherozoids.
$3$. $Cycas$ is a Gymnosperm,which is unique among seed plants for having flagellated,motile male gametes.
Therefore,the set $Riccia, Dryopteris, Cycas$ contains organisms that all possess flagellated male gametes.

(B) Cycas is a gymnosperm,and Adiantum is a pteridophyte (fern).
Both Cycas and Adiantum possess motile male gametes (antherozoids) that require water or a fluid medium to reach the female gamete for fertilization.
While both have vascular tissues,the presence of motile male gametes is a specific shared characteristic often highlighted in evolutionary biology comparisons between these groups.
Seeds are present in Cycas but absent in Adiantum.
Cambium is present in Cycas but absent in Adiantum.

(C) Statement $(1)$ is correct: In bryophytes (liverworts and mosses) and pteridophytes (ferns),the gametophyte phase is free-living.
Statement $(2)$ is correct: Gymnosperms are heterosporous,and some pteridophytes like Selaginella and Salvinia are also heterosporous.
Statement $(3)$ is correct: In Fucus (algae),Volvox (algae),and Albugo (fungi),sexual reproduction is of the oogamous type.
Statement $(4)$ is incorrect: The sporophyte in mosses is more elaborate than in liverworts.
Therefore,there are $3$ correct statements.

(B) Statement $B$ is incorrect because $Mucor$ (a member of Zygomycetes) produces non-motile spores called aplanospores,not flagellated zoospores.
Archegonia are indeed present in bryophytes,pteridophytes,and gymnosperms.
Haploid endosperm is a unique characteristic of gymnosperms,formed before fertilization.
Brown algae (Phaeophyceae) contain chlorophyll $a$,$c$,and the pigment fucoxanthin,which gives them their characteristic brown color.

(C) In bryophytes and pteridophytes,the male gametes (antherozoids) are flagellated and motile. They require a film of water to swim to the female gametes (archegonia) for fertilization. Therefore,water is essential for the transport of male gametes in these plant groups.

(C) $1$. Vascular tissue (xylem and phloem) is present in Pteridophytes,Gymnosperms,and Angiosperms.
$2$. Seed production is a characteristic of Gymnosperms and Angiosperms.
$3$. $A$ taproot system is a characteristic feature of Dicots (a group within Angiosperms) and Gymnosperms.
$4$. Monocots typically possess a fibrous root system.
$5$. Therefore,plants that possess vascular tissue,produce seeds,and have a taproot system are Gymnosperms and Dicots.