Biology /
IGCSE exam questions with correct answers
/ // // // // //
how //the //students //should //maintain //the //water //quality //in //their //pond //- //verified //answer(s)-
✔✔(more) //oxygen /// //prevent //stagnation /// //eq //; //bubbling /// //paddles /// //pump /// //eq;
add //water //plants;
ignore //ref //to //temperature /// //killing //bacteria /// //adding //pesticides /// //adding //antibiotics
ignore //monitoring //ignore //cleaning
remove //waste /// //remove //faeces /// //remove //dead //fish /// //remove //leaves /// //eq;
prevent //eutrophication /// //don't //fertilise //nearby //fields /// //prevent //algal //growth ///
how //is //seed //and //fruit //formed //- //verified //answer(s)-✔✔-
zygote //develops //into //an //embryonic //plant //with //small //root //(radicle) //and //shoot //(plumule)
-/
/the /
/other /
/contents /
/of /
/the /
/ovule /
/develop //into //cotyledon //which //acts //as //food //store //for //young //plant //when //germenates.
-the //ovule //wall //becomes //the //seed //coat //or //testa
-the //ovary //wall //becomes //fruit //coat
Use /
/understanding /
/of /
/natural /
/selection /
,to //answer //why //mice //in //colder //place //have //the //biggest //mass //- //verified //answer(s)-
/
✔✔1. //the //colder //the //place //the //bigger //the //mouse;
2. //variation;
3. //(due //to) //mutation;
4. //bigger //mice //survive /// //survival //of //the //fittest /// //not //killed //and //reproduce /// //
5. //less //heat //loss /// //keep //warm /// //insulation; //
6. //small(er) //surface //area //to //volume //ratio; //
7. //pass //on //allele /// //gene;
Why /
/plant /
/of /
/producing /
/offspring /
/by //sexual //reproduction //rather //than //by //asexual //reproduction //- //verified //answer(s)-
✔✔1. //variation /// //diversity /// //different; //
2. //of //alleles /// //genes;
3. //better //chance //of //survival /// //not //all //killed //by //disease
Why //excess //mucus //can //cause //lung //infection //- //verified //answer(s)-
✔✔1. //bacteria /// //pathogens /// //microorganisms /// //microbes; //
2. //reproduce /// //multiply /// //grow /// //feed /// //divide /// //eq;
3. //remain //in //lung /// //cannot //be //removed
Control //temperature //- //verified //answer(s)-✔✔waterbath /// //glass //screen
Control //CO2 //- //verified //answer(s)-✔✔add //same //mass //of //hydrogen //carbonate //to //water
,Control //light //intensity //- //verified //answer(s)-
✔✔distance //from //lamp /// //use //a //light //meter /// //same //bulb ///background //light
Consequences //of //greenhouse //effect //- //verified //answer(s)-
✔✔1. /
/global //warming /// //earth //warms /// //atmosphere //heats //up /// //temperature //rises /// //traps //heat
/// //eq;
2. //ice //caps //melt /// //eq;
3. //flooding /// //rise //in //sea //level;
4. /
/climate /
/change /// /
/extreme /
/weather /// //hurricanes /// //drought /// //eq; //5. //habitat //destruction /// //desertification /// //eq;
6. //extinction /// //disruption //of //food //chains /// //loss //of //species;
7. /
/migration /// /
/distribution /
/of //organisms /// //distribution //of //pests /// //spread //of //disease /// //affects //plant //growth;
Ways //to //reduce //build //up //of //greenhouse //gases //in //the //atmosphere //- //verified //answer(s)-
✔✔1. /
/burn //less //fossil //fuels /// //drive //less //cars /// //use //hybrid //cars /// //use //public //transport /// //cycling
/// //low //energy //light //bulbs /// //eq;
2. //plant //more //trees /// //reduce //deforestation;
3. //use //renewable //energy /// //wind /// //solar /// //wave /// //nuclear /// //eq;
4. //reduce //cattle //farming /// //fewer //paddy //fields /// //less //aerosols
HIV //and //AIDS //- //verified //answer(s)-✔✔HIV //is //the //virus, //AIDS //is //the //disease.
, assimilation //- //verified //answer(s)-
✔✔small //food //molecules //are //used //to //build //large //molecules
Egestion //- //verified //answer(s)-✔✔Removal //of //undigested //waste //through //anus
ingestion //- //verified //answer(s)-✔✔food //entering //mouth
Process //of //digestion //in //mouth //- //verified //answer(s)-✔✔1. //amylase;
2. //starch;
3. //maltose /// //glucose;
4. //physical //digestion /// //mechanical //digestion /// //chewing
Process //of //digestion //in //stomach2cd //- //verified //answer(s)-✔✔
Process //of //digestion //in //small //intestine //- //verified //answer(s)-✔✔
effect //of //emphysema //on //gas //exchange //- //verified //answer(s)-✔✔1. //less //surface //area;
2. //slower //diffusion /// //less //diffusion /// //less //gas //exchange; //
3. //less //oxygen /// //less //carbon //dioxide
How //coronary //disease //can //cause //death //- //verified //answer(s)-
✔✔1. //blocked /// //narrowed /// //clogged /// //eq; //
2. //coronary //artery;
3. //clot;
4. //fat /// //cholesterol;
5. //less //blood //to //heart;
6. //less //oxygen /// //less //oxygenated;
IGCSE exam questions with correct answers
/ // // // // //
how //the //students //should //maintain //the //water //quality //in //their //pond //- //verified //answer(s)-
✔✔(more) //oxygen /// //prevent //stagnation /// //eq //; //bubbling /// //paddles /// //pump /// //eq;
add //water //plants;
ignore //ref //to //temperature /// //killing //bacteria /// //adding //pesticides /// //adding //antibiotics
ignore //monitoring //ignore //cleaning
remove //waste /// //remove //faeces /// //remove //dead //fish /// //remove //leaves /// //eq;
prevent //eutrophication /// //don't //fertilise //nearby //fields /// //prevent //algal //growth ///
how //is //seed //and //fruit //formed //- //verified //answer(s)-✔✔-
zygote //develops //into //an //embryonic //plant //with //small //root //(radicle) //and //shoot //(plumule)
-/
/the /
/other /
/contents /
/of /
/the /
/ovule /
/develop //into //cotyledon //which //acts //as //food //store //for //young //plant //when //germenates.
-the //ovule //wall //becomes //the //seed //coat //or //testa
-the //ovary //wall //becomes //fruit //coat
Use /
/understanding /
/of /
/natural /
/selection /
,to //answer //why //mice //in //colder //place //have //the //biggest //mass //- //verified //answer(s)-
/
✔✔1. //the //colder //the //place //the //bigger //the //mouse;
2. //variation;
3. //(due //to) //mutation;
4. //bigger //mice //survive /// //survival //of //the //fittest /// //not //killed //and //reproduce /// //
5. //less //heat //loss /// //keep //warm /// //insulation; //
6. //small(er) //surface //area //to //volume //ratio; //
7. //pass //on //allele /// //gene;
Why /
/plant /
/of /
/producing /
/offspring /
/by //sexual //reproduction //rather //than //by //asexual //reproduction //- //verified //answer(s)-
✔✔1. //variation /// //diversity /// //different; //
2. //of //alleles /// //genes;
3. //better //chance //of //survival /// //not //all //killed //by //disease
Why //excess //mucus //can //cause //lung //infection //- //verified //answer(s)-
✔✔1. //bacteria /// //pathogens /// //microorganisms /// //microbes; //
2. //reproduce /// //multiply /// //grow /// //feed /// //divide /// //eq;
3. //remain //in //lung /// //cannot //be //removed
Control //temperature //- //verified //answer(s)-✔✔waterbath /// //glass //screen
Control //CO2 //- //verified //answer(s)-✔✔add //same //mass //of //hydrogen //carbonate //to //water
,Control //light //intensity //- //verified //answer(s)-
✔✔distance //from //lamp /// //use //a //light //meter /// //same //bulb ///background //light
Consequences //of //greenhouse //effect //- //verified //answer(s)-
✔✔1. /
/global //warming /// //earth //warms /// //atmosphere //heats //up /// //temperature //rises /// //traps //heat
/// //eq;
2. //ice //caps //melt /// //eq;
3. //flooding /// //rise //in //sea //level;
4. /
/climate /
/change /// /
/extreme /
/weather /// //hurricanes /// //drought /// //eq; //5. //habitat //destruction /// //desertification /// //eq;
6. //extinction /// //disruption //of //food //chains /// //loss //of //species;
7. /
/migration /// /
/distribution /
/of //organisms /// //distribution //of //pests /// //spread //of //disease /// //affects //plant //growth;
Ways //to //reduce //build //up //of //greenhouse //gases //in //the //atmosphere //- //verified //answer(s)-
✔✔1. /
/burn //less //fossil //fuels /// //drive //less //cars /// //use //hybrid //cars /// //use //public //transport /// //cycling
/// //low //energy //light //bulbs /// //eq;
2. //plant //more //trees /// //reduce //deforestation;
3. //use //renewable //energy /// //wind /// //solar /// //wave /// //nuclear /// //eq;
4. //reduce //cattle //farming /// //fewer //paddy //fields /// //less //aerosols
HIV //and //AIDS //- //verified //answer(s)-✔✔HIV //is //the //virus, //AIDS //is //the //disease.
, assimilation //- //verified //answer(s)-
✔✔small //food //molecules //are //used //to //build //large //molecules
Egestion //- //verified //answer(s)-✔✔Removal //of //undigested //waste //through //anus
ingestion //- //verified //answer(s)-✔✔food //entering //mouth
Process //of //digestion //in //mouth //- //verified //answer(s)-✔✔1. //amylase;
2. //starch;
3. //maltose /// //glucose;
4. //physical //digestion /// //mechanical //digestion /// //chewing
Process //of //digestion //in //stomach2cd //- //verified //answer(s)-✔✔
Process //of //digestion //in //small //intestine //- //verified //answer(s)-✔✔
effect //of //emphysema //on //gas //exchange //- //verified //answer(s)-✔✔1. //less //surface //area;
2. //slower //diffusion /// //less //diffusion /// //less //gas //exchange; //
3. //less //oxygen /// //less //carbon //dioxide
How //coronary //disease //can //cause //death //- //verified //answer(s)-
✔✔1. //blocked /// //narrowed /// //clogged /// //eq; //
2. //coronary //artery;
3. //clot;
4. //fat /// //cholesterol;
5. //less //blood //to //heart;
6. //less //oxygen /// //less //oxygenated;
