MCQOPTIONS
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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 2551. |
R.Q. is represented by [CBSE PMT 1988; DPMT 2003; KCET 2004] |
| A. | \[\frac{C}{N}\] |
| B. | \[\frac{C{{O}_{2}}}{{{O}_{2}}}\] |
| C. | \[\frac{{{O}_{2}}}{C{{O}_{2}}}\] |
| D. | \[\frac{N}{C}\] |
| Answer» C. \[\frac{{{O}_{2}}}{C{{O}_{2}}}\] | |
| 2552. |
In succulents respiratory quotient is always less than one because of [CPMT 1988] |
| A. | Complete oxidation |
| B. | Complete reduction |
| C. | Incomplete oxidation |
| D. | Incomplete reduction |
| Answer» D. Incomplete reduction | |
| 2553. |
In Opuntia, in night the R.Q. will be [CPMT 1986] |
| A. | One |
| B. | Less than one |
| C. | More than one |
| D. | Zero |
| Answer» E. | |
| 2554. |
R.Q. of fatty substances is generally [RPMT 1984, 1999; DPMT 1985; MP PMT 1984; KCET 1999] |
| A. | Unity |
| B. | Less than one |
| C. | Greater than one |
| D. | Zero |
| Answer» C. Greater than one | |
| 2555. |
The R.Q. of a plant organ depends upon the nature of the substrate which is |
| A. | Reduced |
| B. | Oxidized |
| C. | Catabolized |
| D. | Metabolized |
| Answer» C. Catabolized | |
| 2556. |
R.Q. is zero when the respiratory substrate is |
| A. | Completely oxidized |
| B. | Incompletely oxidized |
| C. | Not oxidized at all |
| D. | Reduced |
| Answer» C. Not oxidized at all | |
| 2557. |
R.Q. for glucose is |
| A. | 1 |
| B. | 0.5 |
| C. | 2 |
| D. | 0.05 |
| Answer» B. 0.5 | |
| 2558. |
In which of the following plant diploid stage generally dominates [CPMT 1976] |
| A. | Algae |
| B. | Ferns |
| C. | Mosses |
| D. | Fungi |
| Answer» C. Mosses | |
| 2559. |
An advantage which made seed bearing plants so greatly surpass the ferns in colonizing the land, is the evolution of the [CPMT 1974] |
| A. | Ability to photosynthesize |
| B. | Fibrous root system |
| C. | Woody stem |
| D. | Non-swimming sperms |
| Answer» E. | |
| 2560. |
A fern prothallus is bisexual. If fertilization takes place between their gametes then it is known as [BHU 2005] |
| A. | Cros fertilization |
| B. | Self fertilization |
| C. | Isogamous |
| D. | Viviparous |
| Answer» C. Isogamous | |
| 2561. |
Which is the most important group on earth [AMU PMT 2005] |
| A. | Mosses |
| B. | Tracheophyta |
| C. | Bryophyta |
| D. | Liverworts |
| Answer» C. Bryophyta | |
| 2562. |
During fertilization in ferns, male gamete reaches the female gamete through the agency of [HP PMT 2005] |
| A. | Water |
| B. | Insects |
| C. | Chemicals |
| D. | Winds |
| Answer» B. Insects | |
| 2563. |
To which of the groups would you assign plant which has a vascular supply, lacks ovules and reproduces by means of spores [HP PMT 2005] |
| A. | Gymnosperms |
| B. | Thallophyta |
| C. | Bryophyta |
| D. | Pteridophyta |
| Answer» E. | |
| 2564. |
Female gametophyte in heterosporous ferns is [Wardha 2005] |
| A. | Archegonium |
| B. | Protonema |
| C. | Prothallus |
| D. | Megasporangium |
| Answer» D. Megasporangium | |
| 2565. |
Disposal of spores in fern takes place through [AFMC 2005] |
| A. | Annulus |
| B. | Stomium |
| C. | Both (a) and (b) |
| D. | Indusium |
| Answer» D. Indusium | |
| 2566. |
Protonema stage is found in [CPMT 2005] |
| A. | Ferns |
| B. | Mosses |
| C. | Liverworts |
| D. | Fungi |
| Answer» B. Mosses | |
| 2567. |
Most primitive members in which roots not present is [BHU 2005] |
| A. | Psilotum |
| B. | Rhynia |
| C. | Leycopodium |
| D. | Selaginella |
| Answer» C. Leycopodium | |
| 2568. |
Characteristic of fern is [Manipal 2005] |
| A. | Circinate vernation |
| B. | Reticulate venation |
| C. | Parallel venation |
| D. | None of these |
| Answer» B. Reticulate venation | |
| 2569. |
Which pteridophyte is called as horse-tail [Orissa JEE 2005] |
| A. | Equisetum |
| B. | Lycopodium |
| C. | Marsilea |
| D. | Selaginella |
| Answer» B. Lycopodium | |
| 2570. |
Heterothallism refers to [CPMT 1992] |
| A. | Fusion is not accompanied with zygote formation |
| B. | Fusion between morphologically similar strain |
| C. | Fusion between the strains of structurally similar and physiologically different |
| D. | All the above |
| Answer» D. All the above | |
| 2571. |
First vascular plant is [Orissa JEE 2005] |
| A. | Thallophyta |
| B. | Bryophyta |
| C. | Pteridophyta |
| D. | Spermatophyta |
| Answer» D. Spermatophyta | |
| 2572. |
In pteridophytes, phloem is without [Orissa JEE 2005] |
| A. | Sieve cells |
| B. | Sieve tubes |
| C. | Companion cells |
| D. | Both (b) and (c) |
| Answer» D. Both (b) and (c) | |
| 2573. |
Ectophloic siphonostele is found in [CBSE PMT 2005] |
| A. | Adiantum and Cucurbitaceae |
| B. | Osmunda and Equisetum |
| C. | Marsilea and Botrychium |
| D. | Dicksoni and Maidenhair fern |
| Answer» C. Marsilea and Botrychium | |
| 2574. |
The gametophyte of fern bears [MHCET 2004; Pb. PMT 2004] |
| A. | True roots |
| B. | Antheridia |
| C. | Archegonia |
| D. | Both (b) and (c) |
| Answer» E. | |
| 2575. |
The circinate venation is the characteristic feature of ferns. It refers to [CPMT 2004] |
| A. | Coiling of young leaves |
| B. | Arrangement of leaves on stem |
| C. | Attachment of sori on leaves |
| D. | Heterophilly |
| Answer» B. Arrangement of leaves on stem | |
| 2576. |
Heart shaped prothallus of fern bears [BVP 2001] |
| A. | Male sex organs |
| B. | Female sex organs |
| C. | Bisexual |
| D. | None of these |
| Answer» D. None of these | |
| 2577. |
The first plants to appear after a forest fire are the ferns, this is because of the survival of their [Kerala PMT 2004] |
| A. | Spores |
| B. | Leaves |
| C. | Fronds |
| D. | Rhizomes |
| E. | Both (c) and (d) |
| Answer» E. Both (c) and (d) | |
| 2578. |
Mosses and ferns are found in moist and shady places because both [AIIMS 2004] |
| A. | Require presence of water for fertilization |
| B. | Do not need sunlight for photosynthesis |
| C. | Depend for their nutrition on micro-organisms which cane survive only at low temperature |
| D. | Can not compete with sun-loving plants |
| Answer» B. Do not need sunlight for photosynthesis | |
| 2579. |
Jacket of fern antheridium is composed of [DPMT 2004] |
| A. | 2 cells |
| B. | 3 cells |
| C. | 4 cells |
| D. | 5 cells |
| Answer» C. 4 cells | |
| 2580. |
Nephrolepis is a [MHCET 2004] |
| A. | Bryophyte |
| B. | Pteridophyte |
| C. | Gymnosperm |
| D. | Angiosperm |
| Answer» C. Gymnosperm | |
| 2581. |
Which statement is true [JIPMER 1993] |
| A. | Spores and gametes are invariably diploids |
| B. | Spores and gametes are invariably haploids |
| C. | Only gametes are invariably haploids |
| D. | Only spores are invariably diploids |
| Answer» C. Only gametes are invariably haploids | |
| 2582. |
Common characteristic between bryophytes and pteridophytes is [MHCET 2004] |
| A. | Vascularisation |
| B. | Terrestrial habit |
| C. | Water for fertilization |
| D. | Independent sporophyte |
| Answer» D. Independent sporophyte | |
| 2583. |
The number of spores in the sporangium of fern is [AFMC 1996; MHCET 2004] |
| A. | 16 |
| B. | 32 |
| C. | 64 |
| D. | 128 |
| Answer» D. 128 | |
| 2584. |
Fern plant is a [MP PMT 1995] |
| A. | Haploid gametophyte |
| B. | Diploid gametophyte |
| C. | Diploid sporophyte |
| D. | Haploid sporophyte |
| Answer» D. Haploid sporophyte | |
| 2585. |
The sperm of fern is [AFMC 1995] |
| A. | Biciliate and coiled |
| B. | Multiciliate and sickle-shaped |
| C. | Multiciliate and coiled |
| D. | Biciliate and sickle-shaped |
| Answer» C. Multiciliate and coiled | |
| 2586. |
Fern prothallus is developed from [CPMT 1986; BVP 2002; MP PMT 2003] |
| A. | Elaters |
| B. | Spore mother cells |
| C. | Spore |
| D. | Zygote |
| Answer» D. Zygote | |
| 2587. |
New leaf of ferns is called [RPMT 1995] |
| A. | Sporophyll |
| B. | Frond |
| C. | Leaf petiole |
| D. | Leaf node |
| Answer» C. Leaf petiole | |
| 2588. |
The place where sporangium of a fern bursts open is called |
| A. | Operculum |
| B. | Annulus |
| C. | Stomium |
| D. | Ostiole |
| Answer» D. Ostiole | |
| 2589. |
The shape of sporangium in fern is [DPMT 1991] |
| A. | Biconvex |
| B. | Circular |
| C. | Biconcave |
| D. | Plano-convex |
| Answer» B. Circular | |
| 2590. |
The prothallus of fern is [Bihar MDAT 1992] |
| A. | Heart-shaped |
| B. | Dorsiventral |
| C. | Green |
| D. | All of the above |
| Answer» E. | |
| 2591. |
Heterospory is production of [CPMT 1983] |
| A. | Sexual and asexual spores |
| B. | Large and small spores |
| C. | Haploid and diploid spores |
| D. | Diploid and tetraploid spores |
| Answer» C. Haploid and diploid spores | |
| 2592. |
In fern, sporangia are borne on the [CPMT 1992] |
| A. | Margin of leaf |
| B. | Abaxial side of leaf |
| C. | Adaxial side of leaf |
| D. | Only on the tip of leaf |
| Answer» B. Abaxial side of leaf | |
| 2593. |
In fern plant, the ejection of spores with force is achieved by the [JIPMER 1993] |
| A. | Sporangiophore |
| B. | Annulus |
| C. | Stomium |
| D. | Indusium |
| Answer» C. Stomium | |
| 2594. |
When in a stele the xylem is surrounded by phloem, the condition is called |
| A. | Hadrocentric |
| B. | Leptocentric |
| C. | Radial |
| D. | Conjoint collateral |
| Answer» B. Leptocentric | |
| 2595. |
Apogamous cells are [MP PMT 1987] |
| A. | Haploid |
| B. | Diploid |
| C. | Polyploid |
| D. | Triploid |
| Answer» B. Diploid | |
| 2596. |
In fern, spores are formed in [CPMT 1986] |
| A. | Sporangium |
| B. | Oogonium |
| C. | Archegonium |
| D. | Stomium |
| Answer» B. Oogonium | |
| 2597. |
Which of the following venation is characteristic of fern [RPMT 1985] |
| A. | Parallel |
| B. | Reticulate |
| C. | Dichotomous |
| D. | Open furcate |
| Answer» E. | |
| 2598. |
Meristeles are found in [BHU 1979] |
| A. | Cycas stem |
| B. | Pinus needle |
| C. | Fern leaf |
| D. | Fern rhizome |
| Answer» E. | |
| 2599. |
Sometime prothallus of fern give rise to a fern plant. It is an example of [CPMT 1983] |
| A. | Apospory |
| B. | Parthenogenesis |
| C. | Parthenocarpy |
| D. | Apogamy |
| Answer» E. | |
| 2600. |
Vessels are not present in the xylem of |
| A. | Pteridophyta |
| B. | Gymnosperms |
| C. | Angiosperm |
| D. | Both (a) and (b) |
| Answer» E. | |