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Level Of Organization Is A Leaf

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Last Updated: 03 December 2020

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A plant's goal in life is to survive and pass on its genes. Here we will look at different ways in which plants have evolved adaptations to their environment to enhance their survival. Well, look at cacti and their arsenal of spines as well as the story behind toxins in poisonous plants, so you understand just why Poison Ivys kiss is so deadly for Batman. Biology teachers like to quote famous but funny-name biologist Theodosius Dobzhansky, who say, nothing in biology makes sense except in light of evolution. What he meant was that even though sometimes living things exhibit crazy behavior, like birds performing ridiculous mating dances, cacti growing tons of prickly thorns, or Poison dart frogs producing absurdly toxic chemicals, all have evolutionary explanation. In some way, each of these things helps their organisms survive and reproduce. What does this mean for plants? We know plants can take on many different shapes and sizes, and some are spiky and others are poisonous or make delicious fruit. These characteristics always have some evolutionary context. If you ever venture into the desert, you will notice that plants have certain characteristics in common: their stems are fat and succulent, there are lot of broad green leaves, and they are prickly and hurt if you bump into them. If youre thinking that the desert only has sand and palm trees, think again! Deserts are full of plant life and some, such as the Sonoran Desert, can be quite green and lush. So whats deal? Why do desert plants look so different and why do they want to hurt us? Plants do really want to hurt us. They are just defending themselves, just as you would if someone came up and tried to take a bite out of you. Imagine a Desert with a bunch of plants with leaves that look like this: and a bunch of plants that look like this:. Youre hungry, youre thirsty, and like a good little herbivore youre going to eat some leaves to satisfy these needs. Which leave are you going to eat first? Right. Youre going to devour tame, non-pointy leave with such devotion that those plants have little chance of surviving and reproducing. Replay this situation thousands of times and youll see how we end up with deserts full of spiny plants. It is an example of survival of the fittest. In this case, plants that are fitter are ones that are spiny because they do get eaten. Pointy spines also lose water more slowly than flat leaves, giving their plants another advantage over typical leaf shape found in other habitats. The succulent nature of plants in arid environments has also been selected for, evolutionarily speaking: plants that can retain water by storing it in their stems, such as barrel cactus, survive dry spells much better than plants that do store water this way.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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