When it comes to frogs likeL. larvaepartus, the eggs develop inside the female’s body until they become tadpoles. The female then gives birth to the live tadpoles. A few other species, like those within theNectophrynoidesgenus, give birth to fully-formed froglets! This genus includes the...
corn snakes, and pythons. Species, such as rattlesnakes, are ovoviviparous. They keep their eggs inside of their bodies until they hatch. Other species, such as garter snakes and boa constrictors, are viviparous. They give birth to live babies, nourished by a placenta. ...
Bears, snakes and frogs are such animals.Winter is cold in northern countries. But animals are smart. They can spend winter safely.根据短文内容,选择正确答案。 (5分)( )36. Many animals travel to other places to A. find more beautiful places B. keep warm or find food easily C. make ...
Do amphibians lay eggs or give birth to live young? Do amphibians have internal or external fertilization? Do amphibians have two-chambered hearts? Can amphibians lay eggs on land? Do amphibians have heart chambers? Do amphibians eggs have shells?
Where do most amphibians lay their eggs? Can amphibians live in the desert? What environments do amphibians lay eggs in? When do amphibians eggs hatch? Do amphibians lay eggs or give birth to live young? Do amphibians lay eggs without shells?
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It’s long been a scientific dream: to give people a special vaccine before birth to prevent them from getting terrible illnesses. Gene editing (基因编辑) is one way in which we could do this. But this method has also...
People in the countryside are used to having unexpected visitors—wild animals like frogs and snakes. But what if the visitor is an elephant? Pu Cuifen, a villager from Yunnan Province, experiencedthattwo years ago. “I've o...
a sudden and massive burst of light that can outshine a whole galaxy. Supernovae leave their mark on the skies as nebulae, clouds of solar debris that make for many of the most iconic astronomical images ever captured. Supernovae can give birth to black holes and neutron stars, and their...
Frogs do not care for their offspring at all. Cats, being mammals, feed their offspring milk, and take care of them while they are kittens. Why did your male cats leave your home when your female cat had kittens? The male cat doesn't take part in the raising of the kittens it ...