MCQOPTIONS
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MCQOPTIONS
This section includes 533 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Organ of dispersal is tuft of hairs around testa in |
| A. | plumed fruits |
| B. | plumed seeds |
| C. | winged seeds |
| D. | winged fruits |
| Answer» C. winged seeds | |
| 252. |
Examples of Corm include |
| A. | gloriosa |
| B. | Canna |
| C. | Lallang |
| D. | Ginger |
| Answer» B. Canna | |
| 253. |
Nectar is usually absent in flowers pollinated by |
| A. | wind |
| B. | insects |
| C. | water |
| D. | rain |
| Answer» B. insects | |
| 254. |
Germination of 101 years old seeds, was observed in |
| A. | Melon family |
| B. | Arctic Tundra Lupine |
| C. | Moth Mullein |
| D. | Hesperidiums |
| Answer» D. Hesperidiums | |
| 255. |
Onion and garlic are examples of |
| A. | rhizome |
| B. | corm |
| C. | stem tuber |
| D. | bulb |
| Answer» E. | |
| 256. |
Approximately how long a typical moss sporophyte can grow? |
| A. | 20 cm |
| B. | 1 m |
| C. | 5 cm |
| D. | 5 m |
| Answer» B. 1 m | |
| 257. |
When a bee visits the Clitoria flower, it lands on the |
| A. | winged petals |
| B. | standard petal |
| C. | keel petals |
| D. | calyx |
| Answer» C. keel petals | |
| 258. |
Cycling of Carbon (C), nitrogen (N₂), oxygen (O₂) and water (H₂O) is brought about by |
| A. | chemical processes |
| B. | physical processes |
| C. | biological processes |
| D. | all of above |
| Answer» E. | |
| 259. |
Photolysis of six water molecules results in |
| A. | 6 atoms of hydrogen |
| B. | 12 atoms of hydrogen |
| C. | 18 atoms of hydrogen |
| D. | 24 atoms of hydrogen |
| Answer» C. 18 atoms of hydrogen | |
| 260. |
Cutting is not suitable for |
| A. | Lime |
| B. | Sugar-cane |
| C. | Oleander |
| D. | Tapioca |
| Answer» B. Sugar-cane | |
| 261. |
Which of following term describes drying out of plants? |
| A. | dehydration |
| B. | flaccid |
| C. | turgid |
| D. | desiccation |
| Answer» E. | |
| 262. |
Petals of Clitoria flower have |
| A. | bright color |
| B. | same size |
| C. | same shape |
| D. | fragrant |
| Answer» B. same size | |
| 263. |
Vascular plants that produce one type of spores are called |
| A. | heterosporous |
| B. | homosporous |
| C. | Bisporous |
| D. | Monosporous |
| Answer» B. homosporous | |
| 264. |
Horneophyton, psilophyto and cooksonia belong to Tracheophytes group called |
| A. | anthoceropsida |
| B. | psilopsida |
| C. | byopsida |
| D. | bryopsida |
| Answer» C. byopsida | |
| 265. |
Which of following is heterosporous? |
| A. | liverworts |
| B. | spiked mosses |
| C. | club mosses |
| D. | hornworts |
| Answer» C. club mosses | |
| 266. |
Vascular bundles possesses bundle cap to strengthened additionally in |
| A. | balsam |
| B. | venus fly trap |
| C. | sun flower |
| D. | rose |
| Answer» D. rose | |
| 267. |
Around 15-20 million years is time, for evolution of a |
| A. | stem |
| B. | leaf |
| C. | root |
| D. | flower |
| Answer» C. root | |
| 268. |
Climbing vines follow tropic movements of |
| A. | phototropism |
| B. | geotropism |
| C. | thigmotropism |
| D. | hydrotropism |
| Answer» D. hydrotropism | |
| 269. |
On an inflorescent stalk, each flower is a |
| A. | shortened shoot |
| B. | shortened tuber |
| C. | shortened stem |
| D. | shortened cotyledon |
| Answer» D. shortened cotyledon | |
| 270. |
In plants, Dormant seed has |
| A. | high water content |
| B. | low water content |
| C. | low reserves for food |
| D. | high reserves for food |
| Answer» C. low reserves for food | |
| 271. |
Which of following belong to phylum Anthocerophyta? |
| A. | club mosses |
| B. | ferns |
| C. | bryophytes |
| D. | hornworts |
| Answer» E. | |
| 272. |
To hydrolyze Tristearin, the enzyme used is |
| A. | sucrose |
| B. | lipase |
| C. | maltase |
| D. | amylase |
| Answer» C. maltase | |
| 273. |
Raw materials for photosynthesis include |
| A. | light |
| B. | organic nutrients |
| C. | water |
| D. | all of above |
| Answer» E. | |
| 274. |
In natural state, the standard petal in Clitoria is |
| A. | ovulated |
| B. | at the bottom |
| C. | at the top |
| D. | pollinated |
| Answer» C. at the top | |
| 275. |
Major role in movements in plants is of |
| A. | auxin indole acetic acid |
| B. | acetic acid |
| C. | indole acid |
| D. | auxin acetic |
| Answer» B. acetic acid | |
| 276. |
How many of total plant phyla are gymnosperms? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 277. |
How many living species of cycads are there? |
| A. | 1000 |
| B. | 500 |
| C. | 3000 |
| D. | 300 |
| Answer» E. | |
| 278. |
Which of following is not an example of conifers or cone-bearing plants? |
| A. | pines |
| B. | firs |
| C. | redwood |
| D. | legumes |
| Answer» E. | |
| 279. |
Upon dissolving sodium hydrogen carbonate (HCO₃⁻) in water (H₂O), the gas given off is |
| A. | hydrogen |
| B. | oxygen |
| C. | carbon dioxide |
| D. | chlorine |
| Answer» D. chlorine | |
| 280. |
Strongest force to pull water up xylem and into leaf is |
| A. | capillary action |
| B. | root pressure |
| C. | transpiration pull |
| D. | active transport |
| Answer» D. active transport | |
| 281. |
Action spectrum and absorption spectrum |
| A. | show great similarities |
| B. | show great differences |
| C. | are different in freshwater plants |
| D. | are different in variegated leaves |
| Answer» B. show great differences | |
| 282. |
Callus helps in repairing a wound and unites branches during |
| A. | budding |
| B. | grafting |
| C. | layering |
| D. | Both a and b |
| Answer» E. | |
| 283. |
Example of animals bearing special shell composed of calcium crystals |
| A. | marine bivalvia |
| B. | molluscus |
| C. | ant |
| D. | snails |
| Answer» B. molluscus | |
| 284. |
Which of following is another name for ferns? |
| A. | Monilophytes |
| B. | lycophytes |
| C. | bryophytes |
| D. | flowering plants |
| Answer» B. lycophytes | |
| 285. |
Flower with either the stamen or pistil is called as |
| A. | unisexual flower |
| B. | monoecism |
| C. | devious |
| D. | bisexual flower |
| Answer» B. monoecism | |
| 286. |
Substances which can remain in the soil for many years are known as |
| A. | microorganisms |
| B. | insecticides |
| C. | dichloro-triphenyl dichloroethane |
| D. | dichloro-diphenyl trichloroethane |
| Answer» E. | |
| 287. |
Leaves of mimosa require a specific time to regain its turgidity i.e. |
| A. | 5 minutes |
| B. | 10 minutes |
| C. | 8 minutes |
| D. | 12 minutes |
| Answer» C. 8 minutes | |
| 288. |
In germinating seeds, the starch is broken down into |
| A. | galactose |
| B. | glycose |
| C. | glucose |
| D. | fructose |
| Answer» D. fructose | |
| 289. |
In excretion, ultrafiltration retains |
| A. | blood plasma |
| B. | small molecules |
| C. | water |
| D. | solid molecules |
| Answer» E. | |
| 290. |
In grasses, bracts are |
| A. | petals |
| B. | leaf-like structures |
| C. | sepals |
| D. | stigma |
| Answer» C. sepals | |
| 291. |
Turgor pressure keeps plant rigid and resistant to |
| A. | heat |
| B. | bending |
| C. | insects |
| D. | light |
| Answer» C. insects | |
| 292. |
Leaf of a lycopodium is small and contains single undivided vascular supply, such leaf is called |
| A. | macrophyll |
| B. | microphyll |
| C. | aphyll |
| D. | mesophyll |
| Answer» C. aphyll | |
| 293. |
Which of following is another name for club mosses? |
| A. | lycophytes |
| B. | bryophytes |
| C. | flowering plants |
| D. | Monilophytes |
| Answer» B. bryophytes | |
| 294. |
The term protoplasm refers to |
| A. | finished form |
| B. | final form |
| C. | first form |
| D. | flawed form |
| Answer» D. flawed form | |
| 295. |
Purpose of lateral and keel petals is to |
| A. | offer attraction to insects |
| B. | enclose the reproductive organs |
| C. | render low possibilities of cross pollination |
| D. | render high possibilities of cross pollination |
| Answer» C. render low possibilities of cross pollination | |
| 296. |
In atternation of generations, a haploid spermatozoid fuses with a haploid egg to produce diploid |
| A. | gametphyte |
| B. | rhizoids |
| C. | oospore |
| D. | spores |
| Answer» D. spores | |
| 297. |
External pinnae of ear and epiglottis is formed by |
| A. | hyaline cartilage |
| B. | fibro cartilage |
| C. | contractile muscles |
| D. | Both a and b |
| Answer» C. contractile muscles | |
| 298. |
Movement of young stem in a zigzag fashion is found in |
| A. | epinasty |
| B. | hyponasty |
| C. | nutation |
| D. | nutrition |
| Answer» D. nutrition | |
| 299. |
Which of following have spine shaped leaves? |
| A. | bryophytes |
| B. | moss |
| C. | lycophytes |
| D. | sporophytes |
| Answer» D. sporophytes | |
| 300. |
During dormancy, the seeds |
| A. | do not respire |
| B. | respire aerobically |
| C. | respire anaerobically |
| D. | photosynthesis |
| Answer» D. photosynthesis | |