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 46% liverliver608heartheart29skinskin563pancreaspancreas23medicine 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: smyruvery hard 39% raspberryraspberry49orange peelorange peel935key lime and herbskey lime and herbs881almondsalmonds495drinks 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 70% waterwater936mineralsminerals170fatfat3005sweat glandssweat glands160deserts 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 70% 23233220464682552522082626317genetics 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 66% a type of sugara type of sugar1565a mixture of proteinsa mixture of proteins5316an alkaloidan alkaloid725a type of fata type of fat384food 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% hypothalamushypothalamus2475adrenal glandsadrenal glands862thymusthymus884pineal glandpineal gland6891human 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% hydrologyhydrology963hydroculturehydroculture2090hydroponicshydroponics5336hydrofarminghydrofarming2041crops 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 58% ichthyologyichthyology2177herpetologyherpetology7016malacologymalacology1069entomologyentomology1778reptiles 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 46% In Central America onlyIn Central America only900In the west of the United StatesIn the west of the United States2683in the eastern Brazilin the eastern Brazil898in the entire North and Central Americain the entire North and Central America1283plants 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 58% the spinal cordthe spinal cord585cerebellumcerebellum2279the cerebral cortexthe cerebral cortex5822white matter of the brainwhite matter of the brain1301medicine riddles » Play biology quiz and see all the questions.