MCQOPTIONS
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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 3251. |
Which of the following opteon is correct for CO2 absorption in CAM ? |
| A. | During night |
| B. | Only at midnight |
| C. | During day time |
| D. | Morning |
| Answer» B. Only at midnight | |
| 3252. |
Taxonomic category arrange in descending order .......... (MH-01) |
| A. | key |
| B. | hierarchy |
| C. | taxon |
| D. | taxonomic category |
| Answer» E. | |
| 3253. |
Which Source of eutrophication is the modern source of phosphorus ? |
| A. | Detergent |
| B. | Fertilizer |
| C. | Faecal of animal |
| D. | Rivers |
| Answer» B. Fertilizer | |
| 3254. |
Assertion (A) Members of the same species can’t do copulation.Reason (R) Zygote is produced as a result of fertilization. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true and R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» E. | |
| 3255. |
Assertion (A) The hierarchy includes seven obligate categories. Reason (R) Intermediate categories are used to make taxonomic positions more informative |
| A. | A and R both are correct and R is a correct explanation of A |
| B. | A and R both are correct but R is not a correct explanation of A |
| C. | A is true and R is false |
| D. | If both are false |
| Answer» D. If both are false | |
| 3256. |
Assertion (A) Organogenesis and Differention takes place during growth.Reason (R) Number of cells increase during growth. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true and R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» E. | |
| 3257. |
Assertion (A) Every organism posses reproduction,growth,development,adaptation and deathas unique characters. Reason (R) Energy transformation is essential for every organism. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true and R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» C. A is true and R is wrong | |
| 3258. |
Assertion (A) Energy transformation also takes place in metabolism in living organism.Reason (R) Organism have to perform many biological activities. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true and R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» B. A and R both are true and R is not a correct explanation of A | |
| 3259. |
Huxley is a father of which systematic ? (HARYANA-2009) |
| A. | new systematic |
| B. | artificial systematic |
| C. | evolutionary systematic |
| D. | natural systematic |
| Answer» B. artificial systematic | |
| 3260. |
Assertion (A) Group of genera which are closely related is called family.Reason (R) Blattidae is a family which contain pigeons and doves having different genera and species. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true and R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» D. A is wrong and R is true | |
| 3261. |
Branch connected with nomenclature,identification and classification is called_________. |
| A. | Ecology |
| B. | Taxonomy |
| C. | Morphology |
| D. | Physiology |
| Answer» C. Morphology | |
| 3262. |
Hierarchical classification means ____________ . |
| A. | To divide division into classe |
| B. | To divide classes into orders |
| C. | To divide orders into families |
| D. | To rank things one above the other |
| Answer» E. | |
| 3263. |
Assertion (A) Death is a meaningful event. Reason (R) The number of living individuals of each species remains limited through death and components of body further turn to environment |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true but R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» B. A and R both are true but R is not a correct explanation of A | |
| 3264. |
True name is .......... (MANIPAL-2001) |
| A. | APIS Indica |
| B. | mangifera Indica |
| C. | MANGIFERA INDICA |
| D. | Mangifera indica |
| Answer» E. | |
| 3265. |
Assertion (A) Organism must be given two names.Reason(R) Species name must be written in small letter. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true and R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» B. A and R both are true and R is not a correct explanation of A | |
| 3266. |
The suffix- Phyta indicates__________________ . |
| A. | Family |
| B. | Order |
| C. | class |
| D. | Division |
| Answer» E. | |
| 3267. |
Common name and genus are same in .......... (PMT-07) |
| A. | Mangifera |
| B. | Zia |
| C. | Rana |
| D. | Gorilla |
| Answer» E. | |
| 3268. |
Two plants can be conclusively said to belong to the same species if they .......(CBSE-2007) |
| A. | have more than 90% similar genes |
| B. | look similar and possess identical secondary metabolites |
| C. | have same number of chromosomes |
| D. | can reproduce freely with each other and form seeds |
| Answer» E. | |
| 3269. |
How many obligate categories are there? (BHU-06) |
| A. | 3 |
| B. | 5 |
| C. | 7 |
| D. | 9 |
| Answer» D. 9 | |
| 3270. |
The smallest unit of living organism is .......... (AIPMT-2003) |
| A. | DNA |
| B. | RNA |
| C. | cell |
| D. | protein |
| Answer» D. protein | |
| 3271. |
Natural system of classification given by .......... (UP-PMT-2009) |
| A. | Linnaeu |
| B. | Hutchinson |
| C. | Bentham & Hooke |
| D. | Haeckel |
| Answer» D. Haeckel | |
| 3272. |
Assertion (A) If the ratio of anabolic process is more than catabolic process, growth occursReason (R) Growth is an out-put of metabolism. |
| A. | A and R both are true and R is a correct explanation of A |
| B. | A and R both are true but R is not a correct explanation of A |
| C. | A is true and R is wrong |
| D. | A is wrong and R is true |
| Answer» C. A is true and R is wrong | |
| 3273. |
Maize is a .......... (CBSE-09) |
| A. | taxon |
| B. | category |
| C. | series |
| D. | species |
| Answer» E. | |
| 3274. |
A group of interconnected genera is called .......... |
| A. | Family |
| B. | order |
| C. | Phylum |
| D. | Class |
| Answer» B. order | |
| 3275. |
Through, whoch of the following, enery enters in an ecosyslem? |
| A. | Herbivore |
| B. | Producer |
| C. | Decomposer |
| D. | Primary producers |
| Answer» C. Decomposer | |
| 3276. |
Why is algae placed in first place of food chain ? |
| A. | Algae is first to synthesize food. |
| B. | Algae is first to consume food. |
| C. | Every living organisam can utilize fo |
| Answer» B. Algae is first to consume food. | |
| 3277. |
It is correct for ecosystem....... |
| A. | ( Plants, Animals, Microorganisms) + Abiotic environment |
| B. | Community formed by various species present in a particular region. |
| C. | Animal, plants and micro- organisms. |
| D. | Abiotic factors |
| Answer» B. Community formed by various species present in a particular region. | |
| 3278. |
As we proceed in food chain, bio-mass..... |
| A. | Remain Same |
| B. | Decreases |
| C. | Increases |
| D. | Initially same and later keep decreasing. |
| Answer» C. Increases | |
| 3279. |
which of the following option is correct for storage place phosphorus and nitrogen respectively ? |
| A. | Consumer |
| B. | Parental rock and environment |
| C. | Environment and producers |
| D. | Environment and parental rock |
| Answer» C. Environment and producers | |
| 3280. |
Who is primary consumer of biotic community ? |
| A. | Herbivores/ Grazing animal |
| B. | Omnivores |
| C. | Scavengers |
| D. | Carnivores. |
| Answer» B. Omnivores | |
| 3281. |
When does the energy flow start in an ecosystem ? |
| A. | When material cycle starts |
| B. | When sun rises |
| C. | When any living organisam gain fo |
| Answer» C. When any living organisam gain fo | |
| 3282. |
An individual ''x'' uses mashroom as food then in which trophic level mashroom and''x'' are included?Mashroom X Foodchain |
| A. | Secondary Primary Detritivorous food chain |
| B. | Primary Secondary Detritivorous food chain |
| C. | Primary Secondary Grazing food chain |
| D. | Secondary Primary Grazing food chain |
| Answer» C. Primary Secondary Grazing food chain | |
| 3283. |
Which option is not correct for the given diagram ? |
| A. | It indicate decreasing population stable |
| B. | It indicate stable population |
| C. | The post-population age group people are more in number |
| D. | The death rate is higher than birth rate |
| Answer» C. The post-population age group people are more in number | |
| 3284. |
A Snake feed on frog, the hawk feed on this snake. What is the place of snake in foodchain? |
| A. | producer |
| B. | primary consumer |
| C. | secondary consumer |
| D. | Tertiary consumer |
| Answer» D. Tertiary consumer | |
| 3285. |
Which of the following is the correct statement for food chain? |
| A. | Every chain formed by nutritional relations , is used to understand energy flow. |
| B. | Enery componet of the food chain forms trophic level. |
| C. | Inter- relation amongest different food chain froms food web. |
| D. | All of the given |
| Answer» E. | |
| 3286. |
System resulting from interaction of all the known living factors and populaton of all the species of a unit area is... |
| A. | Ecology |
| B. | Genetics |
| C. | Science of plants and animal |
| D. | Ecosystem |
| Answer» E. | |
| 3287. |
What is correct for the given diagram? |
| A. | Pre- re productire group people are more in number |
| B. | Post-re productive group people are more in number |
| C. | Post-re productive group people are more less |
| D. | In it-pre productive and post reproductive age- group are placed respectively. |
| Answer» B. Post-re productive group people are more in number | |
| 3288. |
In which of the following curd eating people are included ? |
| A. | Producer |
| B. | First ]1[s |
| C. | Tertory 3[ ]rd |
| D. | Second 2[ ]nd |
| Answer» B. First ]1[s | |
| 3289. |
Population of which of the following will be highest in the foodchain? |
| A. | Decomposer |
| B. | Primary Producer |
| C. | Photosynthetic organism |
| D. | Secondary consumers |
| Answer» D. Secondary consumers | |
| 3290. |
In which of the following wheat eating pegions included ? |
| A. | Decomposer |
| B. | Primary consumer. |
| C. | primary producers |
| D. | secondary consumer. |
| Answer» C. primary producers | |
| 3291. |
Orchid living on the tree is an example of ..............? |
| A. | Parasitic |
| B. | Predetor |
| C. | Commensalism |
| D. | Mutualism |
| Answer» D. Mutualism | |
| 3292. |
What is the original source of energy for the living organisms ? |
| A. | Carbohydrate |
| B. | Sun light |
| C. | ATP |
| D. | Lipid |
| Answer» C. ATP | |
| 3293. |
Binomial system of nomenclature for plants is effective from _____________ . |
| A. | 5/8/1771 |
| B. | 1/5/1753 |
| C. | 1/8/1758 |
| D. | 6/7/1736 |
| Answer» C. 1/8/1758 | |
| 3294. |
What does following diagram indicate ? |
| A. | Declining Population |
| B. | Constant declining Population |
| C. | Increasing Population |
| D. | Stable Population |
| Answer» D. Stable Population | |
| 3295. |
In ecosystem the source of energy is.... |
| A. | ATP |
| B. | Sun |
| C. | The Green plant |
| D. | Sugar. |
| Answer» D. Sugar. | |
| 3296. |
Which of the following uses maximum energy? |
| A. | Primary comsumer |
| B. | Secondary consumer |
| C. | Decomposer |
| D. | Primary Producers |
| Answer» E. | |
| 3297. |
which of the following is placed in upper most (highest) level of ecological pyramids. |
| A. | Herbivore |
| B. | Carnivors |
| C. | Primary and Secondary Producers. |
| D. | Primary and Secondary consumer. |
| Answer» C. Primary and Secondary Producers. | |
| 3298. |
Which of the following is trophic level of the orchid staying on mango tree ? |
| A. | First |
| B. | Tertiary/ Third |
| C. | Second |
| D. | Fourth |
| Answer» B. Tertiary/ Third | |
| 3299. |
In which of the following weeds are placed ? |
| A. | Primary producer |
| B. | Secondary consumer. |
| C. | Primary consumer. |
| D. | Decomposer. |
| Answer» B. Secondary consumer. | |
| 3300. |
Symmetry observed in diagram is ________ |
| A. | Bilateral |
| B. | Radial |
| C. | Asymmetrical |
| D. | all of the abovr |
| E. | Bufo |
| Answer» C. Asymmetrical | |