Top 10 plants factsPlants quiz
Which plant is hazardous to harvest when it is wet?
Tobacco. Green Tobacco Sickness is a type of nicotine poisoning caused by the dermal absorption of nicotine from the surface of wet tobacco plants. The symptoms include vomiting, headache and fluctuations in blood pressure and heart rate. These may be so severe as to require emergency medical treatment.
What is the natural role of nicotine in tobacco plant?
It is poisonous to insects. Nicotine is a powerful neurotoxin to insects. Many plants other than tobacco contain it, however the concentration of nicotine in tobacco is exceptionally high. Even though some species have evolved the ability to feed on tobacco, it remains relatively easy to grow, being unpalatable to most species. In some places, tobacco became an invasive weed.
Welwitschia is known as the plant with the longest living leaves. How many leaves does it produce in its centuries-spanning lifetime?
Two. Welwitschia is endemic to the Namib desert. The age of individual plants is difficult to assess, but many plants may be over 1000 (or even 2000) years old. Because Welwitschia only produces a single pair of foliage leaves, the plant was thought by some to be neotenic, consisting essentially of a "giant seedling." However, research showed that its anatomy is not consistent with the giant seedling idea. Instead, the plant is more accurately thought of as achieving its unusual morphology as a result of having "lost its head" (apical meristem) at an early stage.
What was the original color of the carrot grown in Europe?
Violet. Since the ancient times, a black carrot has been grown in Asia (var. Atropururea), which was also brought to Europe during the Middle Ages. Through seventeen centuries, almost all of the carrots that were grown were violet. The modern carrot, a result of mutation, was first grown in the Netherlands. As it was sweeter and bigger, it quickly replaced the violet variety.
Which non-coniferous trees are the tallest in the world?
Eucalypts. Eucalyptus regnans, the Australian mountain ash, is the tallest of all flowering plants. Today, the tallest measured specimen named Centurion is 99.6 m (327 ft) tall (taller than the highest giant sequoia). Six other eucalypt species exceed 80 metres in height.
Where is saffron crocus most abundant in the wild?
Nowhere. The saffron crocus is a triploid that is incapable of independent sexual reproduction — all propagation is via manual "divide-and-set" of a starter clone. It may have emerged via plant breeding in late Bronze-Age Crete.
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).
What is the use of lily of the valley for?
It is edible and used in the kitchen. Lily of the valley increases the strength of heart contraction and is used in the initial stages of heart failure. It is also very toxic at overdose. Death poisoning in children after eating a few berries or drinking water from a vase in which a lily of the valley bouquet was made was described.
What kind of plantation is that?
Asparagus. Young shoots of asparagus are covered to exclude light to prevent photosynthesis and the production of chlorophyll, and thus remain pale in color and delicate in flavor and texture. This technique is called blanching.