Amazing facts about seeds, flowers, leaves
Even if a seed is planted upside down, the seedling always grows right-way up. How? Plants can actually sense gravity! (Gravity is what makes us fall back down to earth when we jump.) Inside the soil, the roots of the seedling grow towards gravity, while the stem grows away from it. This makes the roots go down and the stem come up. Once it’s out, the stem also senses light, and grows towards the light. That’s why, if you shine a light sideways at a plant, it starts growing sideways!
Why do flowers look and smell so nice? Bees, butterflies and moths are attracted to pretty flowers, because they drink the sweet nectar deep inside each blossom. While they drink, they also accidentally get pollen from the flower on their feet, and then they carry the pollen to other flowers. When that pollen touches the right part of the flower, the flower is able to make seeds, so that new plants can grow! About 80 per cent of plants that make fruits or vegetables only do so if they get “pollinated” this way. Unfortunately, millions of bees are mysteriously disappearing across North America, endangering the fruit and vegetable farms that rely on them. Nobody is sure why, but some think cellphone signals might be confusing the bees so they don’t know where their hives are.
Why do leaves turn orange in autumn? Plant leaves are green because they have so much green chlorophyll, but they also have orange and yellow carotenes and xanthophylls. In the autumn, trees stop making chlorophyll right before their leaves fall, so the orange and yellow colours underneath finally show through.
Even if a seed is planted upside down, the seedling always grows right-way up. How? Plants can actually sense gravity! (Gravity is what makes us fall …