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.
| 51. |
Hard ropes can be made from the xylem fibers of |
| A. | hemp trees |
| B. | angsana trees |
| C. | sisal plants |
| D. | balsam tree |
| Answer» D. balsam tree | |
| 52. |
Plants that have naked seeds are classified in which of following groups? |
| A. | gymnosperms |
| B. | angiosperms |
| C. | ferns |
| D. | bryophytes |
| Answer» B. angiosperms | |
| 53. |
Philodendron flowers temperature may exceed |
| A. | 30 °C |
| B. | 36 °C |
| C. | 40 °C |
| D. | 46 °C |
| Answer» E. | |
| 54. |
Basic purpose of endosperm is to act as a |
| A. | protection to testa |
| B. | food storage tissue |
| C. | pericarp |
| D. | placenta |
| Answer» C. pericarp | |
| 55. |
Arrangement of unequal dichotomies in a single plane is called |
| A. | planation |
| B. | budding |
| C. | webbing |
| D. | overtopping |
| Answer» B. budding | |
| 56. |
Dispersal of water lily seed depends upon organ called |
| A. | glumes |
| B. | bract |
| C. | aril |
| D. | testa |
| Answer» D. testa | |
| 57. |
Flowers of grass are usually |
| A. | single |
| B. | form inflorescences |
| C. | unisexual |
| D. | bisexual |
| Answer» C. unisexual | |
| 58. |
Perianth of the flower is |
| A. | absent in most flowering plants |
| B. | collection of calyx and corolla |
| C. | collection of calyx and receptacle |
| D. | collection of receptacle and corolla |
| Answer» C. collection of calyx and receptacle | |
| 59. |
In excretion process ultrafiltration retains |
| A. | proteins only |
| B. | platelets only |
| C. | water |
| D. | proteins and platelets |
| Answer» E. | |
| 60. |
In reproductive system of custard apple the |
| A. | self pollination is highly likely |
| B. | flowers are dioecious |
| C. | anthers and stamens may mature at different times |
| D. | anthers and stamens may mature at same time |
| Answer» D. anthers and stamens may mature at same time | |
| 61. |
Characteristics feature of fruits/seeds to be dispersed by animals are that, they have |
| A. | less weight |
| B. | dry pericarp |
| C. | harder pericarp |
| D. | fruit which is succulent |
| Answer» E. | |
| 62. |
Multicellular organs present in sporophytes that make spores are called |
| A. | gametes |
| B. | gonads |
| C. | sporangia |
| D. | placenta |
| Answer» D. placenta | |
| 63. |
Which of following describes modified leaves that bear sporangia? |
| A. | Microphylls |
| B. | megaphylls |
| C. | leaf glade |
| D. | sporangia |
| Answer» E. | |
| 64. |
Outer covering of vacuole is called |
| A. | tonoplast |
| B. | chloroplast |
| C. | epidermis |
| D. | sapwood |
| Answer» B. chloroplast | |
| 65. |
In plants closed stomata reduce due to |
| A. | rate of transpiration only |
| B. | amount of carbon dioxide entering in the leaf only |
| C. | the rate of respiration |
| D. | rate of transpiration and amount of carbon dioxide entering in leaf |
| Answer» E. | |
| 66. |
In plants monoecious refers to a |
| A. | flower that is either male or female |
| B. | plant possessing both male and female flowers |
| C. | tree that is male |
| D. | plant that has female part only |
| Answer» C. tree that is male | |
| 67. |
Fruit is developed from ovary wall and |
| A. | stamen |
| B. | tegmen |
| C. | sepal and stamen |
| D. | petal |
| Answer» C. sepal and stamen | |
| 68. |
Auxin inhibits growth of |
| A. | stem cells |
| B. | leaves cells |
| C. | shoots |
| D. | roots cell |
| Answer» E. | |
| 69. |
In annually growing trees, active portion of older tree is called |
| A. | heart wood |
| B. | sap wood |
| C. | callus |
| D. | bark |
| Answer» C. callus | |
| 70. |
Molluscan body possess |
| A. | exoskeleton |
| B. | hydrostatic skeleton |
| C. | endoskeleton |
| D. | Both a and b |
| Answer» D. Both a and b | |
| 71. |
Protein essential for clotting of blood is |
| A. | albumins |
| B. | fibrinogen |
| C. | globulins |
| D. | lymph |
| Answer» C. globulins | |
| 72. |
For many autotrophic organisms, an essential source of energy is |
| A. | soil |
| B. | nutrients |
| C. | light |
| D. | eating plants |
| Answer» D. eating plants | |
| 73. |
Which of following makes walls of spores hard and resistant to environment? |
| A. | placenta cells |
| B. | carrier cells |
| C. | Sporopollenin |
| D. | sporocytes |
| Answer» D. sporocytes | |
| 74. |
A typical hornwort sporophyte can grow approximately how long? |
| A. | 1 cm |
| B. | 1 m |
| C. | 5 cm |
| D. | 5 m |
| Answer» D. 5 m | |
| 75. |
Secondary growth in plant, girth due to |
| A. | vascular cambium |
| B. | cork cambium |
| C. | Both a and b |
| D. | vascular cork |
| Answer» D. vascular cork | |
| 76. |
Upon decay of aril, water lily seed |
| A. | germinates in soil |
| B. | waits for the appropriate season |
| C. | sinks to the bottom of river or pond and germinates |
| D. | floats in water |
| Answer» D. floats in water | |
| 77. |
Rubber fruits depend upon seed dispersal mechanism of |
| A. | wind |
| B. | insects |
| C. | explosive mechanism |
| D. | water |
| Answer» D. water | |
| 78. |
Gymno sperms cannot produce |
| A. | seeds |
| B. | fruits |
| C. | leaves |
| D. | roots |
| Answer» C. leaves | |
| 79. |
Lycophytes consist of approximately how many species? |
| A. | 100 |
| B. | 200 |
| C. | 500 |
| D. | 1200 |
| Answer» E. | |
| 80. |
Transfer of pollen from the anther to stigma is known as |
| A. | pollination |
| B. | fertilization |
| C. | dispersion |
| D. | copulation |
| Answer» B. fertilization | |
| 81. |
Apple fruit is formed from |
| A. | superior ovary |
| B. | inferior ovary |
| C. | stamen |
| D. | petals of flower |
| Answer» C. stamen | |
| 82. |
A microspore develops in to which of following structures? |
| A. | ovule |
| B. | pollen |
| C. | stigma |
| D. | ovum |
| Answer» C. stigma | |
| 83. |
Rhizoids fix prothallus to soil to absorb |
| A. | heat |
| B. | water |
| C. | salts |
| D. | nutrients |
| Answer» E. | |
| 84. |
Minerals essential for the formation of skeletal structures include |
| A. | calcium |
| B. | carbon |
| C. | cadmium |
| D. | phosphate |
| Answer» B. carbon | |
| 85. |
Species of Mimosaceae which help breaking wind pressure are |
| A. | propis |
| B. | prosopis |
| C. | mimopis |
| D. | postopis |
| Answer» C. mimopis | |
| 86. |
Economically most important family which benefit both human and animal is |
| A. | Poaceae |
| B. | solanaceae |
| C. | Acacia |
| D. | Rosaceae |
| Answer» B. solanaceae | |
| 87. |
In plants embryo forms the |
| A. | Plumule |
| B. | Radical |
| C. | Cotyledons |
| D. | all of above |
| Answer» E. | |
| 88. |
Approximately how many species ferns have? |
| A. | 12000 |
| B. | 1000 |
| C. | 2000 |
| D. | 10 |
| Answer» B. 1000 | |
| 89. |
Self pollination is not possible in |
| A. | dioecious plants only |
| B. | pawpaw only |
| C. | flowers |
| D. | dioecious plants and pawpaw |
| Answer» E. | |
| 90. |
The purpose of glumes is to |
| A. | offer support to the petiole |
| B. | protect the two flowers in the spikelet |
| C. | lower the possibility of wind pollination |
| D. | increase the possibility of insect pollination |
| Answer» C. lower the possibility of wind pollination | |
| 91. |
No matter how favorable the environmental conditions are, the seeds do not germinate if the |
| A. | settlement is not established |
| B. | neighboring seeds do not germinate |
| C. | seeds do not undergo a dormant or resting period |
| D. | seeds are soaked in water |
| Answer» D. seeds are soaked in water | |
| 92. |
Support to baby plants is availed by cells |
| A. | collenchymatous |
| B. | sclerenchymatous |
| C. | conjectimatous |
| D. | Both a and b |
| Answer» B. sclerenchymatous | |
| 93. |
Sucrose developed from excess sugars is transported for storage to |
| A. | seeds |
| B. | stem tubers |
| C. | root tubers |
| D. | all of above |
| Answer» E. | |
| 94. |
Through the xylem vessels, the transportation of water (H₂O) from its roots to its leave is known as |
| A. | transpiration stream |
| B. | translocation stream |
| C. | xylem stream |
| D. | osmosis stream |
| Answer» B. translocation stream | |
| 95. |
Main component of epidermis is |
| A. | Collagen |
| B. | Keratin |
| C. | Elastin |
| D. | Myosin |
| Answer» C. Elastin | |
| 96. |
Stamens are not usually pendulous in plants so pollination takes place by |
| A. | wind |
| B. | insects |
| C. | water |
| D. | animals |
| Answer» C. water | |
| 97. |
Broad Bean is an example of |
| A. | Epigeal Germination |
| B. | Hypogeal Germination |
| C. | Epi-hypogeal Germination |
| D. | Hypo-Epigeal Germination |
| Answer» C. Epi-hypogeal Germination | |
| 98. |
Lesser genetic variability is observed if plant continues |
| A. | cross pollination |
| B. | self pollination |
| C. | meiotic pollination |
| D. | mitotic pollination |
| Answer» C. meiotic pollination | |
| 99. |
In grass, the function of filament is to |
| A. | hold pollens firmly |
| B. | stay inside the bract |
| C. | expose anther to wind |
| D. | hold grass firm in the soil |
| Answer» D. hold grass firm in the soil | |
| 100. |
If entire cell or organism show response to stimulus of light, phenomenon is |
| A. | chemo tactic movement |
| B. | photo tactic movement |
| C. | sleep movements |
| D. | rapid movements |
| Answer» C. sleep movements | |