Mix Examples- Plant Kingdom Questions in English

(C) Flowering plants are specifically known as Angiosperms.
Gymnosperms are seed-bearing plants but do not produce flowers (naked seeds).
Pteridophytes are vascular plants that reproduce via spores and do not produce seeds or flowers.
Therefore,both Gymnosperms and Pteridophytes are not flowering plants.
However,in the context of biological classification,Angiosperms are the only group defined as 'flowering plants'.
Since the question asks which is not a group of flowering plants,and both $B$ and $C$ fit this description,the question implies identifying the group that is definitely not flowering.
Given the standard classification,Pteridophytes are non-seed plants,and Gymnosperms are non-flowering seed plants.
If the question implies which of the options is not a flowering plant,both $B$ and $C$ are correct,but usually,in such multiple-choice questions,the most distinct non-flowering group is selected.
However,since Angiosperms are the only flowering plants,the answer is that both $B$ and $C$ are not flowering plants.

(C) Seedless plants,also known as cryptogams,are divided into three main groups: $1$. Thallophyta (Algae),$2$. Bryophyta (Mosses and Liverworts),and $3$. Pteridophyta (Ferns). These plants do not produce seeds and reproduce via spores.

(C) Bryophytes and Pteridophytes share several characteristics,but they also have distinct differences.
$1$. Both groups exhibit an alternation of generations,where a haploid gametophytic phase alternates with a diploid sporophytic phase.
$2$. Both groups undergo fertilization to form a zygote,which subsequently develops into an embryo (embryophytes).
$3$. However,the statement in option $A$ is incorrect because only Pteridophytes possess well-developed vascular tissues (xylem and phloem),whereas Bryophytes lack them.
$4$. While both have two phases,the term 'alternation of generations' is the most fundamental biological concept describing their life cycle similarity.
$5$. Both form embryos after fertilization,which is a shared characteristic of all embryophytes.

(A) Seed-bearing plants are collectively known as Spermatophytes.
These include Gymnosperms (plants with naked seeds) and Angiosperms (flowering plants with seeds enclosed within fruits).
Bryophytes and Pteridophytes are cryptogams (non-seed bearing plants).
Thallophyta includes algae and fungi,which do not produce seeds.
Therefore,the correct group representing seed-bearing plants is Gymnosperms and Angiosperms.

(C) Flowering plants are known as $Angiosperms$,which produce flowers and seeds enclosed within fruits. Non-flowering plants,such as $Gymnosperms$,$Pteridophytes$,$Bryophytes$,and $Thallophytes$,do not produce flowers. Therefore,the presence or absence of flowers is the primary distinguishing feature between these two groups.

(A) Seedless plants,such as bryophytes and pteridophytes,often exhibit a wide range of sizes. However,in the context of evolutionary biology and botanical classification,many primitive seedless plants (like certain pteridophytes) are characterized by their ability to grow into large,complex structures,often referred to as giant plants compared to their bryophyte ancestors. While they are autotrophic,the term 'giant plants' is frequently used to describe the stature of vascular cryptogams.

(A) Gymnosperms and Angiosperms are both seed-bearing plants (Spermatophytes).
In the life cycle of both groups,the dominant phase is the diploid sporophyte,which is differentiated into roots,stems,and leaves.
Option $A$ is correct because both possess a sporophytic plant body.
Option $B$ is incorrect because while many gymnosperms are wind-pollinated,angiosperms use various agents like insects,birds,and water in addition to wind.
Option $C$ is incorrect because double fertilization is a unique characteristic of angiosperms.
Option $D$ is incorrect because gymnosperms have naked ovules,whereas angiosperms have enclosed ovules (within the ovary).

(B) $A.$ In $Volvox$,the zygote is the only diploid stage. It undergoes meiosis to produce haploid zoospores,which then germinate to form new colonies. This statement is correct.
$R.$ $Volvox$ exhibits a haplontic life cycle,where the dominant phase is the haploid gametophyte,and the zygote is the only diploid structure. This is also correct.
Since the occurrence of meiosis in the zygote is a characteristic feature of the haplontic life cycle,$R$ is the correct explanation of $A$.

(C) $A.$ $Fucus$ is a brown alga that exhibits a diplontic life cycle,where the diploid sporophyte is the dominant,photosynthetic phase. Thus,statement $A$ is true.
$R.$ $Spirogyra$ is a green alga that exhibits a haplontic life cycle. In this cycle,the plant body is haploid $(n)$. The zygote $(2n)$ is the only diploid stage,which undergoes meiosis to form haploid spores. The zygote is not the dominant or active stage; rather,the haploid vegetative filament is the dominant stage. Thus,statement $R$ is false.

(B) The correct answer is $B$.
$Riccia$ is a genus of liverworts belonging to the class $Hepaticopsida$ (or $Marchantiopsida$).
It is a living bryophyte,not a fossil.
$Selaginella$ is a pteridophyte known for being heterosporous (producing two types of spores).
$Equisetum$ is a pteridophyte that is homosporous (producing one type of spore).
$Funaria$ is a well-known moss belonging to the class $Bryopsida$.

(C) The correct answer is $C$.
$A$. Algae are considered the most primitive plants and were the first to evolve in aquatic environments.
$B$. Lichens are pioneer species that colonize bare rocks,initiating the process of ecological succession.
$C$. Bryophytes are often called 'amphibians of the plant kingdom' because they require water for fertilization,but they are not the first land-dwelling plants; Pteridophytes were the first true land plants to possess a vascular system.
$D$. Gymnosperms are characterized by having 'naked seeds' because their ovules are not enclosed by an ovary wall.

(D) The correct answer is $D$.
$Wolffia$ is the smallest known flowering plant (angiosperm),not a plant with an underground rhizome stem.
$Eucalyptus$ is known for its height,reaching $90-100 \ m$.
$Zamia$ $pygmaea$ is recognized as the smallest gymnosperm.
$Rafflesia$ $arnoldii$ produces the largest flower in the plant kingdom.

(B) The correct answer is $B$.
$Selaginella$ is a well-known $Pteridophyte$.
$Penicillium$ is a member of the kingdom $Fungi$.
$Funaria$ is a type of $Moss$ (Bryophyte).
$Strygula$ (often referred to as $Strigula$) is a genus of lichenized fungi, not an alga. Therefore, the pair $Strygula - Algae$ is incorrectly matched.

(D) Embryophyta is a subkingdom of the plant kingdom that includes plants that form an embryo during their life cycle.
This group includes Bryophytes,Pteridophytes,Gymnosperms,and Angiosperms.
Thallophyta (which includes Algae) and Fungi do not form embryos.
Therefore,the group consisting of Bryophyta and Pteridophyta represents Embryophyta.

(C) The classification of plants is based on their structural and reproductive characteristics.
$A$. Algae - Spirogyra is a correct pair as Spirogyra is a filamentous green alga.
$B$. Lichen - Parmelia is a correct pair as Parmelia is a common genus of lichen.
$C$. Pteridophytes - Araucaria is an incorrect pair. Araucaria is a Gymnosperm,not a Pteridophyte. Pteridophytes include plants like ferns and horsetails.
$D$. Bryophytes - Marchantia is a correct pair as Marchantia is a well-known liverwort belonging to the Bryophyta division.
Therefore,the incorrect pair is $C$.

(C) $1$. $Fucus$ is an alga that exhibits a $Diplontic$ life cycle.
$2$. $Spirogyra$ is an alga that exhibits a $Haplontic$ life cycle.
$3$. $Nephrolepis$ (a fern) exhibits a $Haplodiplontic$ life cycle,where both the haploid and diploid phases are multicellular.
$4$. $Ectocarpus$ is an alga that exhibits a $Haplodiplontic$ life cycle.
Therefore,the correctly matched pair is $Nephrolepis$ - $Haplodiplontic$ life cycle.

(A) Both $Bryophytes$ and $Pteridophytes$ share the characteristic of having multicellular reproductive organs (antheridia and archegonia) that are surrounded by a sterile jacket of cells. This protective layer prevents the desiccation of the developing gametes. In $Bryophytes$,the sporophyte is dependent on the gametophyte,whereas in $Pteridophytes$,the sporophyte is independent and dominant.

(B) Algae are simple,thalloid,and autotrophic organisms that lack specialized reproductive structures like those found in higher plants. In algae,the reproductive organs are typically unicellular and lack a surrounding layer of sterile cells. In contrast,bryophytes are more complex and possess multicellular reproductive organs (antheridia and archegonia) that are protected by a sterile jacket of cells. This sterile jacket prevents the reproductive cells from drying out,which is an adaptation to life on land. Therefore,the presence of reproductive organs covered by a sterile jacket is a key feature that distinguishes bryophytes from algae.

(A, D) In a haplontic life cycle,the dominant phase is the haploid $(n)$ gametophyte.
$1$. The gametophyte produces gametes through mitosis because the organism is already haploid.
$2$. Fusion of gametes results in a diploid $(2n)$ zygote.
$3$. The zygote undergoes meiosis to produce haploid $(n)$ spores.
$4$. These spores then undergo mitosis to germinate and develop into a new haploid gametophyte.
Therefore,mitosis occurs during gamete formation and spore germination.

(A) The correct matches are as follows:
$A$. Sequoia sempervirens is the tallest tree in the world $(s)$.
$B$. Wolffia globosa is the smallest angiosperm $(t)$.
$C$. Zamia pygmaea is the smallest gymnosperm $(p)$.
$D$. Eucalyptus is the tallest plant of Australia $(q)$.
$E$. Rafflesia arnoldii has the largest flower $(u)$.
$F$. Agave has the tallest inflorescence $(r)$.
Thus, the correct sequence is $A-(s), B-(t), C-(p), D-(q), E-(u), F-(r)$.

(NONE) The correct matching is as follows:
$1$. $(A)$ Moss: Vegetative reproduction occurs via adventitious branches (e.g., in protonema stage). Thus, $A-(r)$.
$2$. $(B)$ Selaginella: It is a heterosporous pteridophyte, meaning it produces two types of spores (microspores and megaspores). Thus, $B-(q)$.
$3$. $(C)$ Usnea: It is a lichen, and lichens reproduce sexually through their fruiting bodies (apothecia). Thus, $C-(t)$.
$4$. $(D)$ Equisetum: It is a homosporous pteridophyte, meaning it produces spores of the same type. Thus, $D-(u)$.
$5$. $(E)$ Penicillium: It is a fungus that reproduces asexually by producing conidia (non-motile spores). Thus, $E-(s)$.
Therefore, the correct sequence is $A-(r), B-(q), C-(t), D-(u), E-(s)$.

(B) The correct matching is as follows:
$1$. $(A)$ Dryopteris (Fern) is a common pteridophyte,hence $(A-s)$.
$2$. $(B)$ Selaginella is a heterosporous pteridophyte,hence $(B-r)$.
$3$. $(C)$ Equisetum is a homosporous pteridophyte,hence $(C-p)$.
$4$. $(D)$ Rhynia is a well-known fossil pteridophyte,hence $(D-q)$.
$5$. $(E)$ Thermoacidophiles are archaebacteria that live in extremely high-temperature habitats,hence $(E-t)$.
Thus,the correct sequence is $A-(s), B-(r), C-(p), D-(q), E-(t)$.

(A) The correct matching is as follows:
$1$. $(a)$ Oscillatoria is a Cyanobacteria (Blue-green algae), which stores food in the form of starch (cyanophycean starch). Thus, $a-(s)$.
$2$. $(b)$ Cycas is a Gymnosperm. While it does not have true flowers, in the context of evolutionary biology, it represents a primitive stage compared to Angiosperms. Thus, $b-(r)$.
$3$. $(c)$ Fern (Dryopteris) is a Pteridophyte, which produces a gametophytic stage known as prothallus. Thus, $c-(p)$.
$4$. $(d)$ Yeast is a fungus, and its cell wall is composed of chitin. Thus, $d-(q)$.
Therefore, the correct sequence is $a-(s), b-(r), c-(p), d-(q)$.

(C) In Bentham and Hooker's classification system for Polypetalae, the series are divided as follows:
$1$. Thalamiflorae consists of $6$ orders.
$2$. Disciflorae consists of $4$ orders.
$3$. Calyciflorae consists of $5$ orders.
$4$. Inferae consists of $3$ orders.
Matching these: $A$ (Thalamiflorae) matches with $s$ $(6)$, $B$ (Disciflorae) matches with $q$ $(4)$, $C$ (Calyciflorae) matches with $r$ $(5)$, and $D$ (Inferae) matches with $p$ $(3)$.
Therefore, the correct sequence is $A-s, B-q, C-r, D-p$.

(C) The correct matches are as follows:
$1$. Bryophytes: Anthoceros is a member of the Bryophyta group $(A-iii)$.
$2$. Gymnosperms: Thuja is a well-known gymnosperm $(B-iv)$.
$3$. Angiosperms: Onion (Allium cepa) is a flowering plant, which belongs to Angiosperms $(C-ii)$.
$4$. Pteridophytes: Equisetum is a representative genus of Pteridophytes $(D-i)$.
Therefore, the correct sequence is $A-iii, B-iv, C-ii, D-i$.

(C) The correct matches are as follows:
$(A)$ Christmas tree is $Araucaria$ (Column-$iii$).
$(B)$ Fossil plant is $Bennettites$ (Column-$i$).
$(C)$ Ornamental plant is $Thuja$ (Column-$v$).
$(D)$ Tallest tree is $Sequoia$ (Column-$iv$).
Therefore, the correct matching sequence is $(A-iii), (B-i), (C-v), (D-iv)$.

(B) The classification of plants based on Bentham and Hooker's system matches the series with specific examples:
$1$. Calyciflorae includes $Rosa$ $indica$ (Rose) - $(A-r-i)$.
$2$. Bicarpellatae includes $Catharanthus$ $roseus$ (Periwinkle) - $(B-t-iv)$.
$3$. Inferae includes $Helianthus$ $annuus$ (Sunflower) - $(C-p-iii)$.
$4$. Disciflorae includes $Citrus$ $limon$ (Lemon) - $(D-u-v)$.
$5$. Thalamiflorae includes $Hibiscus$ $rosa-sinensis$ (China rose) - $(E-q-vi)$.
$6$. Heteromerae includes $Madhuca$ $indica$ (Mahua) - $(F-s-ii)$.
Therefore,the correct matching is $A-(r-i), B-(t-iv), C-(p-iii), D-(u-v), E-(q-vi), F-(s-ii)$.

(B) Green algae (Chlorophyceae) and Blue-green algae (Cyanobacteria) share similarities in their pigment composition. Both groups contain chlorophyll $a$ as the primary photosynthetic pigment. While Blue-green algae are prokaryotic and Green algae are eukaryotic,they both utilize chlorophyll $a$ for oxygenic photosynthesis,making them similar in this specific biochemical aspect.

(D) The plant kingdom is broadly classified into two groups: Thallophyta and Embryophyta.
Thallophyta includes organisms like algae,which do not have a differentiated plant body into roots,stems,and leaves,and they do not form embryos.
Embryophyta includes all plants that produce embryos during their life cycle.
This group comprises Bryophytes,Pteridophytes,Gymnosperms,and Angiosperms.
Therefore,Embryophyta includes all plants except Thallophyta.

(A) Plants that do not produce seeds and reproduce through spores are collectively known as $Cryptogams$.
Mosses (Bryophytes) and ferns (Pteridophytes) both reproduce via spores and lack specialized reproductive structures like flowers or seeds,placing them in the group $Cryptogams$.
Therefore,the correct option is $A$.

(C) Gymnosperms and Angiosperms are both Spermatophytes,meaning they are seed-bearing plants.
In Gymnosperms,seeds are naked (not enclosed in an ovary),whereas in Angiosperms,seeds are enclosed within fruits.
Both groups share the characteristic of producing seeds for reproduction,which distinguishes them from Pteridophytes and Bryophytes.
Ciliated sperms are found in lower plants like Bryophytes and Pteridophytes,not in higher seed plants.
Ovaries and fruits are exclusive characteristics of Angiosperms.

(D) $Cycas$ is a gymnosperm,while $Adiantium$ is a pteridophyte (fern).
Both $Cycas$ and $Adiantium$ produce motile,flagellated male gametes (antherozoids) that require water or a moist environment to reach the female gamete.
$Cycas$ does not have vessels (it has tracheids),and $Adiantium$ also lacks vessels.
$Cycas$ produces seeds,but $Adiantium$ does not.
Cambium is present in $Cycas$ but absent in $Adiantium$.

(C) In the life cycle of algae,the presence of motile stages (flagellated spores or gametes) is a key characteristic.
Red algae (Rhodophyceae) are unique because they completely lack flagellated or motile stages in their entire life cycle.
Blue-green algae (Cyanobacteria) are prokaryotic organisms that also lack flagellated motile stages.
Green algae (Chlorophyceae) and Brown algae (Phaeophyceae) typically possess flagellated motile stages (zoospores or gametes) in their life cycles.
Therefore,a motile stage is not found in the life cycle of Red algae and Blue-green algae.

(D) living fossil is an organism that has remained essentially unchanged from earlier geologic times and whose close relatives are usually extinct.
$Cycas$ is a gymnosperm often referred to as a living fossil due to its primitive characteristics.
$Ginkgo$ $biloba$ is the most classic example of a living fossil,as it is the only surviving species of its entire division.
$Psilotum$ is a pteridophyte that is also considered a living fossil because it exhibits primitive features similar to extinct vascular plants.
Therefore,all the given options are examples of living fossils.

(D) Flagellated cells (motile cells) are absent in the following groups:
$1$. Red algae (Rhodophyceae): They lack flagella at all stages of their life cycle.
$2$. Blue-green algae (Cyanobacteria): They are prokaryotic and do not possess flagellated cells.
$3$. Higher seed-bearing plants (Gymnosperms and Angiosperms): In these plants,the male gametes are either non-motile or transported via pollen tubes,lacking flagella.
Therefore,the correct answer is $D$ (All of the above).

(D) In the evolution of plants,there is a clear trend towards the reduction of the gametophyte generation.
In bryophytes,the gametophyte is the dominant,independent,and photosynthetic phase.
In contrast,as plants evolved into vascular plants (pteridophytes,gymnosperms,and angiosperms),the gametophyte generation became progressively reduced in size and complexity.
Therefore,compared to the prominent gametophyte of bryophytes,the gametophyte of vascular plants is significantly smaller and possesses smaller,less complex reproductive organs.

(D) In $Whittaker's$ $Five$ $Kingdom$ classification,the kingdom $Plantae$ includes all eukaryotic,chlorophyll-containing organisms.
This group encompasses algae,bryophytes,pteridophytes (ferns),gymnosperms,and angiosperms.
Since $Ferns$,$Gymnosperms$,and $Angiosperms$ are all members of the plant kingdom,the correct answer is 'All of the above'.

(A) Both $Angiosperms$ (flowering plants) and $Gymnosperms$ (naked-seeded plants) are seed-bearing plants (spermatophytes).
In both groups,the female reproductive structure produces ovules that develop into seeds after fertilization.
$Gymnosperms$ lack vessels (except in $Gnetales$) and do not undergo double fertilization,while $Angiosperms$ possess vessels and exhibit double fertilization.
Therefore,the presence of ovules is a common feature shared by both groups.

(D) Bryophytes and Pteridophytes are known as the 'amphibians of the plant kingdom' because they require water for the transfer of male gametes (antherozoids) to the female sex organs (archegonia) to complete the process of fertilization.
Therefore,both $(A)$ and $(B)$ are correct.

(B) Vascular tissues (xylem and phloem) are specialized tissues responsible for the conduction of water and nutrients in plants.
These tissues are characteristic of vascular plants (Tracheophytes).
Thallophytes (which include Algae and Fungi) and Bryophytes are non-vascular plants.
Therefore,vascular tissues are absent in Thallophytes and Bryophytes.

(C) Complex tissues,such as $Xylem$ and $Phloem$,are specialized tissues responsible for the conduction of water and nutrients.
These tissues are characteristic of vascular plants $(Tracheophytes)$.
$Gametophytes$ represent the haploid phase of the plant life cycle and consist of simple parenchymatous cells.
They lack vascular tissue (complex tissues) entirely.
Therefore,complex tissues are not found in any $Gametophyte$.

(B) Birbal Sahni $(1891-1949)$ was a renowned Indian paleobotanist who made significant contributions to the study of the fossils of the Indian subcontinent. He is widely regarded as the father of Indian Paleobotany. He founded the Birbal Sahni Institute of Paleosciences in Lucknow.

(B) Plants that reproduce through spores and do not produce seeds or flowers are collectively known as $Cryptogamae$ (hidden reproduction).
$Mosses$ (Bryophytes) and $Ferns$ (Pteridophytes) both fall under this category as they lack seeds and reproduce via spores.
Therefore, the correct group is $Cryptogamae$.

(A) Cryptogams (from the Greek $kryptos$ meaning 'hidden' and $gamos$ meaning 'marriage') are plants that reproduce by spores and do not produce seeds or flowers. They include Thallophyta,Bryophyta,and Pteridophyta. Since they do not produce seeds,they are referred to as seedless plants. Therefore,the correct option is $A$.

(C) The Bentham and Hooker system of classification is the most famous 'Natural System of Classification' in botany.
The main merit of this system is that the description of each taxon is based on actual and detailed observations of specimens stored in herbaria.
Therefore,this system is considered highly accurate and practical for identification purposes.
It is important to note that this system is not based on evolutionary or phylogenetic principles.

(C) Oswald Tippo,in his classification system,divided the plant kingdom into two sub-kingdoms: Thallophyta and Embryophyta. He further classified the sub-kingdom Thallophyta into $7$ divisions based on their pigments,food storage,and flagellation. These divisions are Cyanophyta,Chlorophyta,Charophyta,Phaeophyta,Rhodophyta,Myxomycophyta,and Eumycophyta.

(D) $1$. Viroids are infectious agents consisting of a short strand of circular,single-stranded $RNA$ without a protein coat. This pair is correct.
$2$. Rye is a monocot plant. Monocots possess companion cells in their phloem tissue. This pair is correct.
$3$. Ginkgo is a gymnosperm. Gymnosperms produce archegonia in their female reproductive structures. This pair is correct.
$4$. Salvinia is a pteridophyte. Pteridophytes have a well-differentiated plant body into true roots,stems,and leaves. They are not thalloid (thalloid body is characteristic of bryophytes and algae). Therefore,this pair is incorrect.

(D) In the plant kingdom,the presence of jacketed (multicellular and sterile-jacketed) sex organs is a characteristic feature of Bryophytes,Pteridophytes,and Gymnosperms.
$Riccia$,$Funaria$,and $Sphagnum$ are all members of the Bryophyta division.
Therefore,all these plants possess jacketed sex organs (antheridia and archegonia).
Thus,the correct option is $D$.

(B) The book $Die \text{ } Natürlichen \text{ } Pflanzenfamilien$,authored by $Adolf \text{ } Engler$ and $Karl \text{ } Prantl$,is widely regarded as the starting point for phylogenetic systems of classification.
This work organized plants based on their evolutionary relationships rather than just morphological similarities,marking a significant shift in botanical taxonomy.

(A) The presence of flagellated (motile) male gametes is a characteristic feature of many lower plants and some gymnosperms.
$1$. $Riccia$ (a liverwort) produces flagellated antherozoids.
$2$. $Dryopteris$ (a fern) produces flagellated antherozoids.
$3$. $Cycas$ (a gymnosperm) produces the largest flagellated male gametes in the plant kingdom.
Therefore,the group $Riccia, Dryopteris, Cycas$ consists of organisms that all possess flagellated male gametes.