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This section includes 200950 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 12301. |
If you know the range of a population, then you know.. |
| A. | the number of individuals that live in an area. |
| B. | the areas that are inhabited by the population. |
| C. | the birth rate and the death rate. |
| D. | the type of climate it lives in. |
| Answer» C. the birth rate and the death rate. | |
| 12302. |
Which of the following organisms does NOT require sunlight to live? |
| A. | chemosynthetic bacteria |
| B. | algae |
| C. | trees |
| D. | photosynthetic bacteria |
| Answer» B. algae | |
| 12303. |
In which way are plants in a sunny mountain meadow and sulfur bacteria in a deep-sea volcanic vent alike? |
| A. | They both use photosynthesis to make their own food. |
| B. | They both produce carbohydrates and oxygen. |
| C. | They both use chemosynthesis to produce their own food. |
| D. | They both produce carbon and hydrogen. |
| Answer» C. They both use chemosynthesis to produce their own food. | |
| 12304. |
Which organism lives where it is sometimes submerged and routinely exposed to air, heat, battering waves, and strong currents? |
| A. | barnacle |
| B. | squid |
| C. | dolphin |
| D. | whale |
| Answer» B. squid | |
| 12305. |
Which factor might NOT contribute to an exponential growth rate in a given population? |
| A. | lower death rates |
| B. | higher birthrates |
| C. | less competition |
| D. | reduced resources |
| Answer» E. | |
| 12306. |
Sea otters live in the ocean. Which of the following is NOT likely to be a limiting factor on the sea otter population? |
| A. | disease |
| B. | competition |
| C. | drought |
| D. | predation |
| Answer» D. predation | |
| 12307. |
During some kinds of population growth, the size of each generation of offspring is larger than the generation before it. So, as the population gets larger, it grows more quickly. This situation is called.. |
| A. | logistic growth. |
| B. | growth density. |
| C. | exponential growth. |
| D. | multiple growth. |
| Answer» D. multiple growth. | |
| 12308. |
A small farming community in Texas covers 14 square kilometers. There are 420 individuals who live within the town limits. What is the population density of this community? |
| A. | 0.03 individuals per square kilometer |
| B. | 53 individuals per square kilometer |
| C. | 30 individuals per square kilometer |
| D. | 10.24 individuals per square kilometer |
| Answer» D. 10.24 individuals per square kilometer | |
| 12309. |
The various growth phases through which most populations go are represented on. |
| A. | a logistic growth curve. |
| B. | an exponential growth curve. |
| C. | a normal curve. |
| D. | a population curve. |
| Answer» B. an exponential growth curve. | |
| 12310. |
How are Phase 1 and Phase 2 of logistic growth similar? |
| A. | A population is increasing, moving toward its carrying capacity during both phases. |
| B. | A population is at its carrying capacity during both phases. |
| C. | The death rate is higher than the birth rate during both phases. |
| D. | The emigration rate is higher than the immigration rate during both phases. |
| Answer» B. A population is at its carrying capacity during both phases. | |
| 12311. |
Which are two ways a population can decrease in size? |
| A. | immigration and emigration |
| B. | increased death rate and immigration |
| C. | decreased birthrate and emigration |
| D. | emigration and increased birthrate |
| Answer» D. emigration and increased birthrate | |
| 12312. |
The movement of organisms into a range is called.. |
| A. | immigration. |
| B. | emigration. |
| C. | population shift. |
| D. | carrying capacity. |
| Answer» B. emigration. | |
| 12313. |
In nature, it is difficult to observe the effects density-independent limiting factors on real populations because density-independent limiting factors |
| A. | strike only dense populations. |
| B. | often have a greater effect on denser populations. |
| C. | usually do not have any effect on populations. |
| D. | usually affect only a small part of a habitat. |
| Answer» C. usually do not have any effect on populations. | |
| 12314. |
After a natural disaster such as a hurricane or a drought, a population.. |
| A. | can thrive and increase. |
| B. | can be mostly killed off. |
| C. | will experience exponential growth. |
| D. | will reach its carrying capacity. |
| Answer» C. will experience exponential growth. | |
| 12315. |
Each of the following is a density-dependent limiting factor EXCEPT.. |
| A. | competition. |
| B. | temperature. |
| C. | crowding. |
| D. | disease. |
| Answer» C. crowding. | |
| 12316. |
Using Figure 5-2, what is the most likely cause of the decrease in moose population immediately after 1995? |
| A. | Poisonous plants killed off many moose. |
| B. | Many moose reached old age and died. |
| C. | Overcrowding caused competition in the moose population. |
| D. | A decrease in predators caused competition in the moose population. |
| Answer» D. A decrease in predators caused competition in the moose population. | |
| 12317. |
Which density-dependent factors other than the predator/prey relationship affected the populations of moose and wolves on Isle Royale? |
| A. | extreme temperatures for the moose and flooding for the wolves |
| B. | parasitic wasps for the wolves and clear-cut forest for the moose |
| C. | a hurricane followed by drought for both moose and wolves |
| D. | food availability for the moose and disease for the wolf |
| Answer» E. | |
| 12318. |
About 500 years ago, the world's population started.. |
| A. | decreasing. |
| B. | to reach carrying capacity. |
| C. | growing more rapidly. |
| D. | to level off. |
| Answer» D. to level off. | |
| 12319. |
The graph in Figure 5-3 shows the changes in a mosquito population. What caused the changes seen in the graph? |
| A. | a reduction in resources |
| B. | a increase in predation. |
| C. | a density-independent limiting factor |
| D. | a density-dependent limiting factor |
| Answer» D. a density-dependent limiting factor | |
| 12320. |
Which of the following is a density-independent limiting factor? |
| A. | a struggle for food, water, space, or sunlight |
| B. | predator/prey relationships |
| C. | the eruption of a volcano |
| D. | parasitism and disease |
| Answer» D. parasitism and disease | |
| 12321. |
0.5, 1.5, 4.5, 13.5, .... |
| A. | 40.5 |
| B. | 45 |
| C. | 46.0 |
| D. | 46.7 |
| Answer» B. 45 | |
| 12322. |
Obtain the sum of all positive integers up to 1000, which are divisible by 5 and not divisible by 2. |
| A. | 50000 |
| B. | 60000 |
| C. | 78888 |
| D. | 9088 |
| Answer» B. 60000 | |
| 12323. |
95, 115.5, 138, ...., 189. |
| A. | 162.8 |
| B. | 162.9 |
| C. | 160 |
| D. | 162.5 |
| Answer» E. | |
| 12324. |
6, 13, 28, ( ?). |
| A. | 67 |
| B. | 45 |
| C. | 68 |
| D. | 59 |
| Answer» E. | |
| 12325. |
The anticipated human population by the year 2050 is about.. |
| A. | 7.8 billion. |
| B. | 9 billion |
| C. | 9 trillion |
| D. | 78 billion. |
| Answer» C. 9 trillion | |
| 12326. |
In countries like India, the human population is growing |
| A. | exponentially. |
| B. | transitionally. |
| C. | logistically. |
| D. | demographically. |
| Answer» B. transitionally. | |
| 12327. |
121, 225, 361, ..... |
| A. | 529 |
| B. | 544 |
| C. | 234 |
| D. | 546 |
| Answer» B. 544 | |
| 12328. |
4, 10, (?), 82, 244, 730. |
| A. | 23 |
| B. | 25 |
| C. | 28 |
| D. | 77 |
| Answer» D. 77 | |
| 12329. |
2, 5, 9, ..... , 20 , 27 |
| A. | 16 |
| B. | 12 |
| C. | 13 |
| D. | 14 |
| Answer» E. | |
| 12330. |
23. 24, 60, 120, 210, (? ). |
| A. | 330 |
| B. | 333 |
| C. | 336 |
| D. | 340 |
| Answer» D. 340 | |
| 12331. |
134, 245, 356, 467, (? ). |
| A. | 576 |
| B. | 578 |
| C. | 567 |
| D. | 656 |
| Answer» C. 567 | |
| 12332. |
21, 25, 33, 49, 81,. |
| A. | 145 |
| B. | 146 |
| C. | 167 |
| D. | 188 |
| Answer» B. 146 | |
| 12333. |
Which of the following is not found in bacteria? |
| A. | cell wall |
| B. | plasma membrane |
| C. | membrane bound nucleus |
| D. | flagella |
| Answer» D. flagella | |
| 12334. |
When did the first definitive prokaryotic fossils appear in the fossil record? |
| A. | 530 million years ago |
| B. | 1 billion years ago |
| C. | 1.5 billion years ago |
| D. | 2.5 billion years ago |
| Answer» E. | |
| 12335. |
According to phylogenetic analysis, which kingdom is the most closely related to Kingdom Animalia? |
| A. | Protista |
| B. | Plantae |
| C. | Eubacteria |
| D. | Fungi |
| Answer» E. | |
| 12336. |
Our current era is the: |
| A. | Mesozoic |
| B. | Permian |
| C. | Paleozoic |
| D. | Cenozoic |
| Answer» E. | |
| 12337. |
1, 6, 15, ... , 45, 66, 91. |
| A. | 23 |
| B. | 24 |
| C. | 18 |
| D. | 28 |
| Answer» E. | |
| 12338. |
The checkpoint that requires a cell to be of adequate size in order to move forward is: |
| A. | G1 checkpoint |
| B. | G2 checkpoint |
| C. | Metaphase checkpoint |
| D. | S checkpoint |
| Answer» B. G2 checkpoint | |
| 12339. |
A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus. Those cells would have ______ picograms at the end of the S phase and ______ at the end of G2: |
| A. | 8:8 |
| B. | 8:16 |
| C. | 16:8 |
| D. | 16:16 |
| Answer» E. | |
| 12340. |
Transcrive the following nucleotide sequence ATTCTCCA: |
| A. | UAACAGGU |
| B. | ATTGTCCA |
| C. | TAACAGGT |
| D. | None of the above are correct |
| Answer» B. ATTGTCCA | |
| 12341. |
During which stage of the cell cycle does chromatin coil in to form chromosomes: |
| A. | prophase |
| B. | telophase |
| C. | interphase |
| D. | anaphase |
| Answer» B. telophase | |
| 12342. |
The Northern and Southern Hemispheres receive approximately equal amounts of solar radiation in on the: |
| A. | March equinox |
| B. | June solstice |
| C. | September equinox |
| D. | both a and c |
| Answer» E. | |
| 12343. |
97, 86, 73, 58, 45, (? ) |
| A. | 34 |
| B. | 35 |
| C. | 36 |
| D. | 37 |
| Answer» B. 35 | |
| 12344. |
Sickle cell anemia is an example of: |
| A. | polygenic inheritance |
| B. | pleiotropy |
| C. | linkage |
| D. | sex-linked inheritance |
| Answer» C. linkage | |
| 12345. |
Select the possible sex of the cat pictured (black cat): |
| A. | Hemizygous male |
| B. | Homozygous female |
| C. | Homozygous male |
| D. | Both a and b |
| Answer» E. | |
| 12346. |
5, 16, 49, 104, (? ). |
| A. | 123 |
| B. | 161 |
| C. | 171 |
| D. | 181 |
| Answer» E. | |
| 12347. |
462, 420, 380, ( ?), 306 . |
| A. | 324 |
| B. | 333 |
| C. | 256 |
| D. | 342 |
| Answer» E. | |
| 12348. |
12, 32, 72, 152, .... |
| A. | 341 |
| B. | 351 |
| C. | 312 |
| D. | none |
| Answer» D. none | |
| 12349. |
Choose the biome that best matches the following description: an area with higher average temperatures and moderate variation in temperature, along with low annual precipitation: |
| A. | subtropical deserts |
| B. | tropical wet forests |
| C. | boreal forests |
| D. | temperate grasslands |
| Answer» B. tropical wet forests | |
| 12350. |
Of the conditions that can cause a deviation from Hardy Weinberg equilibrium, only _____ causes an adaption to the environment: |
| A. | natural selection |
| B. | genetic drift |
| C. | gene flow |
| D. | nonrandom mating |
| Answer» B. genetic drift | |