It’s the most commonly observed tropic responses in plants where the shoot grows towards light and hence they’re positively phototropism whereas in case of roots,they show negative phototropism. This phototropic bending is caused due to the migration of auxin (phytohormone) molecules away from lighted side and their concentration on dark side increases.This stimulates growth on the dark side of the plant organ relative to lighted side causing it to bend towards light source. A well known and often repeated experiments with oat seedlings (Avena coleoptile) have shown that the auxin IAA which causes elongation of cells,migrates to the shaded side of coleoptiles when irradiated unidirectionally.
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I called the person who was ECTO 1 Ghostbusters Shirt to get them adopted over and asked if they could get me this little guy. He reached in and grabbed the little ball of fur and handed him to me. Finally I got to see his sweet kitty face. His eye was crusted with green goo . My roommate insisted I put him down immediately ” He’s sick! What do you want a kitten and then watch it die?” We hadn’t even gone there for a cat yet here I was holding this teeny baby with the gooey eye knowing he had won my heart already.
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