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.
| 351. |
Plants with bisexual flowers include |
| A. | custard apple only |
| B. | sage only |
| C. | tulip |
| D. | custard apple and sage |
| Answer» E. | |
| 352. |
For successful grafting, the stock and scion shall be of |
| A. | different species |
| B. | same species |
| C. | similar groups |
| D. | different class |
| Answer» C. similar groups | |
| 353. |
Proteins help in |
| A. | developing new protoplasm in leaves |
| B. | cellular respiration |
| C. | providing energy to the body |
| D. | providing minerals for digestion |
| Answer» B. cellular respiration | |
| 354. |
Which of following is not an example of avascular plants? |
| A. | liverworts |
| B. | legumes |
| C. | mosses |
| D. | hornworts |
| Answer» C. mosses | |
| 355. |
Root pressure is enhanced as the |
| A. | water is needed in leaves for photosynthesis |
| B. | cells around xylem are low in salts and amino acids |
| C. | more water is available for the plant |
| D. | concentration gradient makes osmosis happen at a greater speed |
| Answer» E. | |
| 356. |
Flowers of plant which close at night due to rapid growth in lower side is |
| A. | rose |
| B. | mimosa |
| C. | ferns |
| D. | tulip |
| Answer» E. | |
| 357. |
In starvation, the first thing to be consumed to keep vital processes is |
| A. | fats and glucose |
| B. | fats and glycogen |
| C. | fats and amino acids |
| D. | fats and cellulose |
| Answer» C. fats and amino acids | |
| 358. |
Nectar at base of androecium can be reached by |
| A. | any insect |
| B. | wings or feathers of visiting birds and insects |
| C. | insects with a long proboscis |
| D. | mosquitoes only |
| Answer» D. mosquitoes only | |
| 359. |
Leaf may absorb maximum light due to |
| A. | strong petiole |
| B. | strong turgor pressure in xylem |
| C. | strong turgor pressure in mesophyll cells |
| D. | closed stomata |
| Answer» D. closed stomata | |
| 360. |
In hyponasty, bud will remain |
| A. | close |
| B. | open |
| C. | semi-open |
| D. | wilt |
| Answer» B. open | |
| 361. |
What is maximum height that a non-vascular plant can grow? |
| A. | 20 cm |
| B. | 2 m |
| C. | 20 m |
| D. | 1 cm |
| Answer» B. 2 m | |
| 362. |
Nearly 90% of all living plants belong to |
| A. | gymnosperms |
| B. | angiosperms |
| C. | ferns |
| D. | bryophytes |
| Answer» C. ferns | |
| 363. |
Small size and light weight ensures |
| A. | proper seed dispersal |
| B. | seed dispersal through wind |
| C. | seed dispersal through water |
| D. | seed dispersal through insects |
| Answer» C. seed dispersal through water | |
| 364. |
Stamens are protruding, large and feathery in plants pollinated by |
| A. | winds |
| B. | insects |
| C. | water |
| D. | rain |
| Answer» B. insects | |
| 365. |
Unequal branches of stem which grew unequally at different rates given rise to different planes, this development is |
| A. | planation |
| B. | budding |
| C. | overtopping |
| D. | webbing |
| Answer» D. webbing | |
| 366. |
Chlorophyll is found in oval-shaped structures known as |
| A. | stomata |
| B. | mitochondria |
| C. | chloroplast |
| D. | centrioles |
| Answer» D. centrioles | |
| 367. |
Fats do not help in |
| A. | dark stage of photosynthesis |
| B. | storage |
| C. | developing new protoplasm in leaves |
| D. | cellular respiration |
| Answer» B. storage | |
| 368. |
Even in the presence of sunlight and water, photosynthesis can not occur due to the lack of |
| A. | mineral nutrients |
| B. | essential metallic elements |
| C. | essential non-metallic elements |
| D. | carbon dioxide (CO₂) |
| Answer» E. | |
| 369. |
Passive movements of chloroplast is an example of positive tactic movement due to |
| A. | oxygen fixation |
| B. | CO2 fixation |
| C. | cyclosis |
| D. | nitrogen fixation |
| Answer» D. nitrogen fixation | |
| 370. |
Plumed fruits develop a parachute like structure called as |
| A. | testa |
| B. | lodicule |
| C. | glumes |
| D. | pappus |
| Answer» E. | |
| 371. |
Seeds may loose vitality if stored in |
| A. | tropical area |
| B. | completely dry area |
| C. | desert |
| D. | wet area |
| Answer» B. completely dry area | |
| 372. |
If pollen grains are transferred to a flower in another plant of the same kind, it is referred to as |
| A. | self pollination |
| B. | cross pollination |
| C. | meiotic pollination |
| D. | mitotic pollination |
| Answer» C. meiotic pollination | |
| 373. |
In apples, the fleshy part is receptacle, whereas the pericarp |
| A. | is absent |
| B. | forms a hard outer layer |
| C. | forms a soft outer layer |
| D. | forms a hard inner layer |
| Answer» C. forms a soft outer layer | |
| 374. |
How many known species of plants are there? |
| A. | 1000 |
| B. | 50000 |
| C. | 290000 |
| D. | 10000 |
| Answer» D. 10000 | |
| 375. |
Each fruit is produced by each |
| A. | seed |
| B. | flower |
| C. | plant |
| D. | root |
| Answer» C. plant | |
| 376. |
Pancreatic duct attaches pancreas to |
| A. | liver |
| B. | duodenum |
| C. | small intestine |
| D. | spleen |
| Answer» C. small intestine | |
| 377. |
In plants, where self-pollination is unlikely due to greater distance between male and female parts includes |
| A. | pawpaw |
| B. | custard apple |
| C. | sage |
| D. | rose |
| Answer» D. rose | |
| 378. |
Photo tactic movement helps chloroplast to retain maximum light for |
| A. | oxygen fixation |
| B. | CO2 fixation |
| C. | water fixation |
| D. | nitrogen fixation |
| Answer» C. water fixation | |
| 379. |
Disadvantages of natural vegetative propagation include |
| A. | lack of dispersal mechanisms |
| B. | no fertilization is involved |
| C. | the area is quickly colonized |
| D. | offspring's are exact clones of parent plants |
| Answer» B. no fertilization is involved | |
| 380. |
Generation of turgor pressure is done by high osmotic pressure of |
| A. | cell wall |
| B. | cell membrane |
| C. | cell vacuole |
| D. | cell sap |
| Answer» D. cell sap | |
| 381. |
Starch (C₆H₁₀O₅)n is stored in |
| A. | rhizome |
| B. | corm |
| C. | stem tuber |
| D. | bulb |
| Answer» C. stem tuber | |
| 382. |
Protoplasm of a cell consists of |
| A. | vacuole, chloroplast, tonoplast |
| B. | nucleus, cytoplasm, cell surface membrane |
| C. | cell membrane and nucleus |
| D. | cell wall, cell membrane and nucleus |
| Answer» C. cell membrane and nucleus | |
| 383. |
Adaptability to environmental changes improves due to |
| A. | cross pollination |
| B. | self pollination |
| C. | wind pollination |
| D. | insect pollination |
| Answer» B. self pollination | |
| 384. |
How much of earth's land surface is covered by peatland? |
| A. | 0.01 |
| B. | 0.1 |
| C. | 0.03 |
| D. | 0.9 |
| Answer» D. 0.9 | |
| 385. |
In grass, the pollination is affected through |
| A. | filament protruding out of the bract only |
| B. | mature stigma protruding out of the bract only |
| C. | immature petals and sepal |
| D. | filament protruding and mature stigma protruding out of bract |
| Answer» E. | |
| 386. |
Legumes depend upon the seed dispersal mechanism of |
| A. | wind |
| B. | insects |
| C. | explosive mechanism |
| D. | water |
| Answer» D. water | |
| 387. |
For terrestrial adaptation, Bryophytes form a special structure to absorb water is known as |
| A. | antherozoids |
| B. | rhizoids |
| C. | water molds |
| D. | hydrophiles |
| Answer» C. water molds | |
| 388. |
Evolution fusion of vascular strands given rise to a pattern called |
| A. | vacsular venation |
| B. | reticulation |
| C. | venation |
| D. | reticulate venation |
| Answer» E. | |
| 389. |
Whisk Ferns belong to group called |
| A. | tracheophyta |
| B. | bryophyta |
| C. | tricophyta |
| D. | quadrophyta |
| Answer» B. bryophyta | |
| 390. |
Leaf which bear sporangia is called as |
| A. | sori |
| B. | sporophyll |
| C. | sporing |
| D. | chlorophyll |
| Answer» C. sporing | |
| 391. |
Plants body which are composed of large number of ridges and furrows along with a rough stem are |
| A. | sphenopsida |
| B. | hepaticopsids |
| C. | lycopsida |
| D. | bryopsida |
| Answer» B. hepaticopsids | |
| 392. |
In natural process, sporophyte undergoes fertilization which provide a large amount of genetic |
| A. | variability |
| B. | mutation |
| C. | transfer |
| D. | recombination |
| Answer» B. mutation | |
| 393. |
After fertilization, ovule is called a |
| A. | fruits |
| B. | seed |
| C. | embryo |
| D. | zygote |
| Answer» C. embryo | |
| 394. |
Bryophytes need water for their reproduction and hence cant live without water so they are called |
| A. | amphibians |
| B. | Amphibians of plants |
| C. | water molds |
| D. | hydro bryophytes |
| Answer» C. water molds | |
| 395. |
Touch me not (Mimosa Pudica) belong to family |
| A. | Acacia |
| B. | Solanaceae |
| C. | Rosaceae |
| D. | Pistacia |
| Answer» B. Solanaceae | |
| 396. |
Known species of plants are |
| A. | 400,000 |
| B. | 360,000 |
| C. | 260,000 |
| D. | 200,000 |
| Answer» C. 260,000 | |
| 397. |
Liver worts belong to subdivision of bryophytes called as |
| A. | hepaticopsida |
| B. | anthoceropsida |
| C. | bryopsida |
| D. | ectosida |
| Answer» B. anthoceropsida | |
| 398. |
Beverages like whisky is made from Rye, Barley, corn and Rum molasses which belong to class |
| A. | Rosaceae |
| B. | Poaceae |
| C. | Solanaceae |
| D. | Acacia |
| Answer» C. Solanaceae | |
| 399. |
A family which has about 100 genres and 2000 species is |
| A. | rosaceae |
| B. | cassia |
| C. | papilionaceae |
| D. | Both a and b |
| Answer» C. papilionaceae | |
| 400. |
Egg or oosphere is found bedded in cushion of thallus in |
| A. | pith |
| B. | tail |
| C. | head |
| D. | venter |
| Answer» E. | |