Biology questions This is a list of recently added questions about biology. Play biology quiz and see all the questions. Which protein causes blood to clot?Fibrinogen. In order to reduce the loss of blood and facilitate the recovery of the blood vessel at the site of the injury, a blood clot is formed. It is made up of platelets and dissolved plasma protein-fibrogen. By the substance released by the blood-thrombin plate, fibrogen changes into fibrin, which creates a dense network at the site of injury.Created by: pawnikvery hard 31% fibrinogenfibrinogen417fibrinfibrin466myosinmyosin166pepsinpepsin291blood riddles » 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 51% liverliver1324heartheart105skinskin1544pancreaspancreas53medicine 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 44% raspberryraspberry207orange peelorange peel2754key lime and herbskey lime and herbs2156almondsalmonds1071drinks 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% waterwater1405mineralsminerals246fatfat4717sweat glandssweat glands223deserts 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% 232353124646134652523262626481genetics 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 65% a type of sugara type of sugar2318a mixture of proteinsa mixture of proteins7363an alkaloidan alkaloid1026a type of fata type of fat549food 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 61% hypothalamushypothalamus3100adrenal glandsadrenal glands1102thymusthymus1109pineal glandpineal gland8571human 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% hydrologyhydrology1204hydroculturehydroculture2598hydroponicshydroponics6926hydrofarminghydrofarming2684fruits 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 57% ichthyologyichthyology2928herpetologyherpetology9295malacologymalacology1446entomologyentomology2371reptiles 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 only1242In the west of the United StatesIn the west of the United States3653in the eastern Brazilin the eastern Brazil1268in the entire North and Central Americain the entire North and Central America1650plants riddles » Play biology quiz and see all the questions.