10 most difficult nature riddles A list of ten (out of 309) nature related questions that are the most often answered incorrectly Nature quiz Which rodent has the highest ratio of brain mass to body mass?Beaver a large semiaquatic broad-tailed rodent that is native to North America and northern Eurasia. It is noted for its habit of gnawing through tree trunks to fell the trees in order to feed on the bark and build dams. The beaver has the highest ratio of brain mass to body weight among rodents, which is reflected in the behavior and the ability to act not only instinctively, but also logically. very hard 17% ratrat61%beaverbeaver17%squirrelsquirrel10%mousemouse10%Created by: Tschuka . Statistics based on 199 answers in 2 languages »rodents riddles » Which species of cannabis contains the most THC?Cannabis Sativa. Some studies indicate that, on average, Cannabis sativa has higher levels of CBD compared to THC than C. indica. The effects of sativa are well known for its cerebral high, while indica is well known for its sedative effects which some prefer for night time use. Both types are used as medical cannabis.very hard 19% Cannabis Indica Cannabis Indica 54%Cannabis SativaCannabis Sativa19%Cannabis RuderalisCannabis Ruderalis10%Cannabis KushCannabis Kush15%Created by: Tschuka . Statistics based on 1729 answers in 2 languages »drugs riddles » For what main reason do chameleons change color? As a social signal to othe chameleons. Color change in chameleons has various functions, depending on the species, but the most common is social signaling. Only few species, such as Smith's dwarf chameleon, also adjust their colors for camouflage. very hard 20% to match their surroundingsto match their surroundings52%as a social signal to othe chameleonsas a social signal to othe chameleons20%their skin change color when pressedtheir skin change color when pressed5%chameleons do not change colorchameleons do not change color21%Created by: globalquiz.org. Statistics based on 7957 answers in 4 languages »reptiles riddles » Which animals are the most threatened by a prion disease?Sheep. Scrapie is infectious and incurable. Recent studies suggest prions may be spread through urine and persist in the environment for decades. Scrapie occurs in Europe and North America, but to date, Australia and New Zealand (both major sheep-producing countries) are scrapie-free.very hard 21% cattlecattle33%catscats39%sheepsheep21%ducksducks5%Created by: ex-terminator. Statistics based on 6115 answers in 2 languages »diseases riddles » How much of Australia coastline is desertous? (out of total 21,262 miles/34,218 km)140 miles (180 km). More than 40% of Australia's land is classified as desert, but almost all of it is located inland. The Great Sandy Desert is the only one to extend to the coast, forming the long sweep of the Eighty Miles Beach (which is actually 140 miles long).very hard 21% 140 miles (180 km)140 miles (180 km)21%1,000 miles (1,600 km)1,000 miles (1,600 km)14%3,000 miles (4,800 km)3,000 miles (4,800 km)24%14,000 miles (22,500 km)14,000 miles (22,500 km)40%Created by: Cleo. Statistics based on 5015 answers in 2 languages »geography of Australia riddles » What mushroom is it?Shaggy parasol. The shaggy parasol is popularly praised as a choice edible mushroom. However, it contains toxins which can cause gastric upsets when eaten raw or undercooked, and some individuals show a strong allergic response even after cooking.very hard 21% parasol mushroomsparasol mushrooms55%Shaggy parasolShaggy parasol21%Browned mushroomsBrowned mushrooms11%Toadstool rusty brownToadstool rusty brown11%Created by: Tschuka . Statistics based on 552 answers in 2 languages »food riddles » Which of these countries has the highest level of afforestation?Japanese inu. Among developed countries, Japan has one of the highest levels of afforestation, over 68% of the area - beign surpassed only by Sweden and Finland.very hard 23% RussiaRussia46%NorwayNorway12%BrazilBrazil17%Japanese inuJapanese inu23%Created by: Tschuka . Statistics based on 240 answers in 2 languages »trees riddles » Aside from cattle, which animal provides most milk used by humans?Buffalo. Water buffaloes provide 11% of the world's milk, which is much more than goats (2%, third place). Buffalo's milk contains higher levels of total solids, crude protein, fat than cow milk; it gives therefore more cheese, butter and other dairy products. The top buffalo milk producers are India and Pakistan. very hard 24% goatgoat46%buffalobuffalo24%sheepsheep20%camelcamel8%Created by: globalquiz.org. Statistics based on 7273 answers in 2 languages »milk riddles » What is the strongest sea current?Antarctic Circumpolar Current. This cold sea current circulates the globe in the far south. It creates a zone of very strong winds and storms, by which sailing Cape Horn is such a challenge for sailors. Depth of current exceeds 3000 m.very hard 24% Antarctic Circumpolar CurrentAntarctic Circumpolar Current24%Equatorial Counter CurrentEquatorial Counter Current12%Gulf StreamGulf Stream42%North Atlantic CurrentNorth Atlantic Current20%Created by: Katarzyna Dąbrowska. Statistics based on 4876 answers in 2 languages »sailing riddles » Which plant belongs to the cabbage family?Rapeseed (Brassica napus) in the case of one particular group of cultivars, canola), is a bright-yellow flowering member of the family Brassicaceae (mustard or cabbage family), cultivated mainly for its oil-rich seed. It is the third-largest source of vegetable oil in the world. very hard 24% lettucelettuce46%RapeseedRapeseed24%spinachspinach17%sorrelsorrel10%Created by: Tschuka . Statistics based on 2648 answers in 2 languages »plants riddles » Play nature quiz and see all the questions.