Question

evolution of eyes and feathers

Answer 1

evolution of eyes
pre existing organisms were slow moving and so did not required eyes to predict objects.but now as the organisms are becoming predators so they need eyes for vision.
for eg planaria or flatworms who had a disc like shape which were light sensitive cells could only predict any source of light but now their eyes have evolved and they have got a clear vision.

evolution of feathers
earlier feathers were used to provide insulation or heat during cold times but now the feathers are used for flight.

hope it helps you.
please mark it as brainliest.

Answer 2

${\huge \boxed {\blue {Here\: Is\: YourAns}}}$

✳️✌️✳️✌️✳️✌️✳️✌️✳️


$<a><b><i>$

❤️Eyes❤️

❇️Many researchers have found the evolution of the eye attractive to study, because the eye distinctively exemplifies an analogous organ found in many animal forms. Simple light detection is found in bacteria, single-celled organisms, plants and animals. Complex, image-forming eyes have evolved independently several times.[1]
⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️
❇️Complex eyes appeared first within the few million years of the Cambrian explosion. From before the Cambrian, no evidence of eyes has survived, but diverse eyes are known from the Burgess shale of the Middle Cambrian, and from the slightly older Emu Bay Shale.[2] Eyes are adapted to the various requirements of their owners. They vary in their visual acuity, the range of wavelengths they can detect, their sensitivity in low light, their ability to detect motion or to resolve objects, and whether they can discriminate colours.

✴️✴️✴️✴️✴️✴️✴️

❤️Evolution❤️

❇️MOST OF US will never get to see nature's greatest marvels in person. We won't get a glimpse of a colossal squid's eye, as big as a basketball. The closest we'll get to a narwhal's unicornlike tusk is a photograph. But there is one natural wonder that just about all of us can see, simply by stepping outside: dinosaurs using their feathers to fly.
∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆
❇️Birds are so common, even in the most paved-over places on Earth, that it's easy to take for granted both their dinosaur heritage and the ingenious plumage that keeps them aloft. To withstand the force of the oncoming air, a flight feather is shaped asymmetrically, the leading edge thin and stiff, the trailing edge long and flexible. To generate lift, a bird has merely to tilt its wings, adjusting the flow of air below and above them.
●●●●●●●●●●●●●●●●
❇️Airplane wings exploit some of the same aerodynamic tricks. But a bird wing is vastly more sophisticated than anything composed of sheet metal and rivets. From a central feather shaft extends a series of slender barbs, each sprouting smaller barbules, like branches from a bough, lined with tiny hooks. When these grasp on to the hooklets of neighboring barbules, they create a structural network that's featherlight but remarkably strong. When a bird preens its feathers to clean them, the barbs effortlessly separate, then slip back into place.

◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆

❇️The origin of this wonderful mechanism is one of evolution's most durable mysteries. In 1861, just two years after Darwin published Origin of Species, quarry workers in Germany unearthed spectacular fossils of a crow-size bird, dubbed Archaeopteryx, that lived about 150 million years ago. It had feathers and other traits of living birds but also vestiges of a reptilian past, such as teeth in its mouth, claws on its wings, and a long, bony tail. Like fossils of whales with legs, Archaeopteryx seemed to capture a moment in a critical evolutionary metamorphosis. "It is a grand case for me," Darwin confided to a friend.
<><><><><><><><><>
❇️The case would have been even grander if paleontologists could have found a more ancient creature endowed with more primitive feathers—something they searched for in vain for most of the next century and a half. In the meantime, other scientists sought to illuminate the origin of feathers by examining the scales of modern reptiles, the closest living relatives of birds. Both scales and feathers are flat. So perhaps the scales of the birds' ancestors had stretched out, generation after generation. Later their edges could have frayed and split, turning them into the first true feathers.

_______________✔️✔️✔️✔️✔️
______________________________✅✅✅✅

$<marquee >$

$\large{\red{\boxed{\mathbb{Hope\: It\: Helps}}}}$

❤️
✨✨
❤️❤️❤️
✨✨✨✨
❤️❤️❤️❤️❤️
✨✨✨✨✨✨
❤️❤️❤️❤️❤️❤️❤️
✨✨✨✨✨✨✨✨
❤️❤️❤️❤️❤️❤️❤️❤️❤️
✨✨✨✨✨✨✨✨✨✨