In the case of the tree frogs, the scientists were lucky to find such natural hybrid zones. The Carpathians form a perfect border between Hyla arborea and Hyla orientalis that are then joined again to the north of the mountains, in the Polish lowlands. When populations are separated (allopat...
It is in the south-east of Africa. The is just like a big 1 zoo. There are a lot of special animals, birds, frogs,and insects. They're different from the animals on other lands.The most special animal is the lemur(狐猴). Lemurs are different in are red while others are white....
Yes, their vocalizations can change as they mature, especially in terms of mating calls. Are there any species known specifically for their distinctive screams? Yes, the “screaming tree frog” from South America is known for its particularly loud and distinctive calls. Can pet frogs scream? Pe...
If there were dinosaur-bearing rocks in North America and Africa, and the African dinosaur remains could be dated biostratigraphically, how could you correlate the North American deposits with the African ones? Cynodonts are frequently referred to as mammal-like reptiles. Why is this a scientifica...
2005). The point we make is that there are no hard data to demonstrate that the number of species being dispersed by people is greater than that of species dispersing naturally, and such data would be highly beneficial. What may be clouding perspectives on this point is that in modern ...
Cool fossil frogs. Giant Japanese salamander! Fire salamanders: not as colourful as the real thing, but here revealing their reproductive cycle in beautiful detail. Closeup of oviduct in above. Sexual dimorphism in Leptodactylus frogs: the males have bulging upper arms to (I am assuming) help ...
Thinking about what the introduction of Burmese pythons has done in the Everglades, explain why "non-native-species" are such a problem for an ecosystem. Threats to Biodiversity: Biodiversity is the variety and difference of organism...
It began 15 years ago and a world away, on the redwood-shaded campus of UC Berkeley in northern California. Leela had been studying elephants as a graduate student at University of Wisconsin, but after reading about East Africa’s declining lion population, she was drawn to the challenge of...
11 You, your officials, and your people will be rid of the frogs, and there will be none left except in the Nile.” 12 Then Moses and Aaron left the king, and Moses prayed to the Lord to take away the frogs which he had brought on the king. 13 The Lord did as Moses asked, ...
How is it possible that the largest animals on the planet live in the oceans? What characteristics are unique to mammals? (a) Are mammals more highly evolved than lizards, birds, and frogs? (b) Why or why not? What is exceptional about the early anim...