2 12 09 Coevolution
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This document discusses several examples of co-evolution between species: 1) Orchids and moths have co-evolved, with some orchids developing long spurs to store nectar and moths evolving long tongues to reach the nectar. Darwin predicted this relationship would exist before a fitting moth species was discovered. 2) Acacia trees have evolved defenses against herbivores like thorns and toxins, while animals have adapted ways to avoid or tolerate these defenses. 3) Pronghorns can run very fast, likely in co-evolution with predators like cheetahs and hyenas that used to inhabit North America. Bacteria also co-evolve with antibiotics as
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K.Elango,
Ph.D Scholar(Agrl.Entomology)
Tamil Nadu Agricultural University,
Coimbatore-641003
Mobile number : +91 8675619656
+91 9445159656
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Echolocation 141029103609-conversion-gate02
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1639
Co-evolution involves the joint evolution of interacting species that exert reciprocal selective pressures on each other. Symbiosis describes close ecological couplings between species, including mutualism where both benefit, commensalism where one benefits and the other is not harmed, and predation/parasitism where one loses and the other gains. Many species engage in complex co-evolutionary relationships, such as ants cultivating fungi, ants protecting acacia trees, flowers co-evolving with pollinators like bees and hummingbirds, and fish/birds engaging in mutualistic cleaning behaviors. Camouflage also plays an important role in species interactions, with some adopting forms and colors that mimic inedible objects or their surroundings
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Animal Adaptations
The document discusses animal adaptations and provides examples. It explains that adaptations are physical or behavioral traits that help animals survive in their habitat, such as a bird's beak shape or an animal's fur color. Physical adaptations develop over generations, not in a single lifetime. Examples of animal adaptations include teeth shapes relating to diet and leg or foot structures relating to locomotion. Defense adaptations like camouflage, bright colors, quills or horns are also discussed. Specific animal adaptations for lions, giraffes, and zebras are then outlined.
Animal adaptations
The document discusses animal adaptations and provides examples. It explains that adaptations are physical or behavioral traits that help animals survive in their habitat, such as a bird's beak shape or an animal's fur color. Physical adaptations develop over generations, not in a single lifetime. Examples of animal adaptations include herbivore and carnivore teeth types, bird leg and beak traits, reptile scales and egg-laying, and amphibian skin absorption. Animals also use defenses like camouflage, bright colors, quills, and speed. Specific adaptations of lions, giraffes, and zebras are then outlined.
Animal adaptations
The document discusses animal adaptations and provides examples. It explains that adaptations are physical or behavioral traits that help animals survive in their habitat, such as a bird's beak shape or an animal's fur color. Physical adaptations develop over generations, not in a single lifetime. Examples of animal adaptations include teeth shapes relating to diet and leg or foot structures relating to locomotion. Defense adaptations like camouflage, bright colors, quills or horns are also discussed. Specific animal adaptations for lions, giraffes, and zebras are then outlined.
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- 1. Co-evolution
- 8. Slid the moth over and you will see the tongue fits perfectly How could this evolve like this?