Why Do Leaves Change Colors in the Fall?
Besedišče – prevedi glagole v oklepaju v angleščino. Prva črka je dana. / Translate the verbs in brackets into English. The first letter has been given.
In many places around the world, autumn is m _ _ _ _ _ (1 je zaznamovana) by the slow, beautiful change of green foliage to vibrant reds, oranges, yellows, and purples. Green leaves a _ _ _ _ _ (2 so videti) green because of the presence of the pigment chlorophyll, which is key to photosynthesis. In temperate regions, cold winters p _ _ _ (3 predstavljajo tveganje) a risk to the leaves of broadleaf trees and other perennials, and so these plants d _ _ _ (4 odvržejo) their leaves in a controlled fashion to r _ _ _ _ _ (5 da zmanjšajo) injuries and c _ _ _ _ _ _ _ (6 shranijo) energy. This event is usually t _ _ _ _ _ _ _ _ (6 povzročen) by the declining day length and falling temperatures of autumn. Leaf abscission (the technical term for the dropping of leaves) b _ _ _ _ _ (8 se začne) with the degradation of chlorophyll. As the green f _ _ _ _ (9 bledi), yellow and orange pigments known as carotenoids are revealed in the leaves of many species. In other plants, pigments called anthocyanins a _ _ _ _ _ _ _ _ _ (9 se nabirajo) in the leaves at this time, giving them shades of red and purple. Some of the most beautiful fall foliage f _ _ _ _ _ _ _ (10 vključuje) both types of pigments, often with one color giving way to the next as the season progresses. Eventually all the leaves are dropped, and the plant goes dormant for the long winter months.
(Adapted from britannica.com on 7 October 2017)
