Biology questions This is a list of recently added questions about biology. Play biology quiz and see all the questions. Which human organ is the largest?Skin is the largest in size (about 2 square meter) and the heaviest organ, making up about 16% of body weigh. It is composed of 3 layers: epidermis, dermis and hypodermis.Created by: smyruhard 49% liverliver847heartheart58skinskin898pancreaspancreas28medicine riddles » What is a Curaçao liqueur flavored with?Orange peel. Curaçao is made of dried peel of Laraha (Citrus aurantium currassuviencis), a citrus too bitter to be edible. The beverage and the plant come from Dutch Curaçao island by the coasts of Venezuela. Feral Laraha evolved from domesticated Seville orange brought to the island by Spanish settlers. Its peel is also used in medicine to treat stomach.Created by: smyruhard 46% raspberryraspberry72orange peelorange peel1567key lime and herbskey lime and herbs1126almondsalmonds617drinks riddles » What is inside the camel's hump?Fat. Camels can live without water many days. They don`t sweating, don`t loosing water in excrements. Camels drinkig seldom but they can drink 100 liters in 10 minutes. Created by: Hanna Kaminskaeasy 71% waterwater1086mineralsminerals197fatfat3772sweat glandssweat glands188deserts riddles » How many pairs of chromosomes does a human have?23. A typical human possesses 23 pairs of chromosomes, which add up to 46. Two of the chromosomes are gender related. A female will have two X chromosomes and a male will have one x and y chromosome. As you may have noticed, females do not have y chromosome.Created by: 12 year old geniuseasy 71% 23233904464695852522562626360genetics riddles » What is gluten?A mixture of proteins. Gluten is a mixture of two proteins: gliadin and a glutenin, found in wheat, barley and rye.Created by: globalquiz.orgaverage 67% a type of sugara type of sugar1757a mixture of proteinsa mixture of proteins6119an alkaloidan alkaloid801a type of fata type of fat423food riddles » Which from endocrine glands is responsible for a regulation of sleep?Pineal gland. The pineal gland is a small endocrine gland in the vertebrate brain. It produces melatonin, a serotonin derived hormone, which affects the modulation of sleep patterns. Melatonin is sold over-the-counter as a sleep aid in the U.S. and Canada.Created by: Paweł Kołodziejczykaverage 62% hypothalamushypothalamus2651adrenal glandsadrenal glands938thymusthymus949pineal glandpineal gland7511human anatomy riddles » How is the soilless cultivation of plants called?Hydroponics is a subset of hydroculture and is a method of growing plants using mineral nutrient solutions, in water, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite or gravel.Created by: Paweł Kołodziejczykhard 51% hydrologyhydrology1047hydroculturehydroculture2257hydroponicshydroponics5928hydrofarminghydrofarming2201fruits riddles » How is the branch of zoology concerned with aphibians and reptiles called?Herpetology. "Herp" is a vernacular term for reptiles and amphibians. It is derived from Greek 'herpien' meaning 'to creep'.Created by: Paweł Kołodziejczykhard 59% ichthyologyichthyology2343herpetologyherpetology7813malacologymalacology1154entomologyentomology1916reptiles riddles » Where do coast redwoods grow?In the west of the United States. Common names of sequoia sempervirens include coast redwood, coastal redwood and California redwood. It is an evergreen, long-lived, monoecious tree living 1,200–1,800 years or more. This species includes the tallest living trees on Earth. It comes from coastal mountains of Oregon and California. (the west of the USA).Created by: Paweł Kołodziejczykhard 47% In Central America onlyIn Central America only1007In the west of the United StatesIn the west of the United States3028in the eastern Brazilin the eastern Brazil982in the entire North and Central Americain the entire North and Central America1404plants riddles » A condition of the unconsciousness is an effect of the shutdown of what?The cerebral cortex. Unconsciousness is a state which occurs when the ability to maintain an awareness of self and environment is lost. It involves a complete or near-complete lack of responsiveness to people and other environmental stimuli.Created by: Paweł Kołodziejczykhard 59% the spinal cordthe spinal cord631cerebellumcerebellum2431the cerebral cortexthe cerebral cortex6413white matter of the brainwhite matter of the brain1383medicine riddles » Play biology quiz and see all the questions.