安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Learn the effects of deforestation - WWF
As well as being stunningly beautiful, forests are vital for the health of our planet They provide food and shelter for so much of life on Earth – from fungi and insects to tigers and elephants More than half the world's land-based plants and animals, and three-quarters of all birds, live in and around forests
- Animal Captivity Statistics – Heartwrenching Realities
Only Around 200 Animal Species Are Included in Zoo Breeding Programs Across Europe (the Independent) Zoos claim to focus on conservation, education, and research However, the actual scenario might surprise you This stat indicates that zoos are not contributing significantly to the conservation of a wide range of animal species, as they often
- Top 10 Reasons Why Animals and Plants Go Extinct - ThoughtCo
Why do animals go extinct? Planet Earth teems with life and includes thousands of species of vertebrate animals (mammals, reptiles, fish, and birds); invertebrates (insects, crustaceans, and protozoans); trees, flowers, grasses, and grains; and a bewildering array of bacteria, and algae, plus single-celled organisms—some inhabiting scalding deep-sea thermal vents
- Color vision - Wikipedia
When viewed in full size, this image contains about 16 million pixels, each corresponding to a different color in the full set of RGB colors The human eye can distinguish about 10 million different colors [29] From the V1 blobs, color information is sent to cells in the second visual area, V2
- A Biologist Spotlights 4 ‘Invincible’ Animals That Survived . . .
In the past 500 million years on Earth, there have been five mass extinctions Here are a few incredible species that managed to squeak through the cracks
- The Timeline of Mass Extinction Events on Earth - WorldAtlas
The normal rate of extinction is between 0 1 and 1 species per 10,000 species per 100 years In mass extinctions, species disappear faster than the ecosystem can replace them An event is a mass extinction if the earth loses more than 75% of its species in 2 8 million years or less
- Last universal common ancestor - Wikipedia
[3] [4] Charles Darwin more famously proposed the theory of universal common descent through an evolutionary process in his book On the Origin of Species in 1859: "Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth have descended from some one primordial form, into which life was first
|
|
|