Bacteria and other tiny cells merely divide in two to reproduce, but more complex creatures need more complex means of reproduction. Animals use eggs in one form or other; however, most are not very similar to the familiar breakfast food many of us enjoy. Animal eggs are as different and varied in their structure as the animals who made them.
The mother animals lay eggs. They also hatch the eggs. After a certain period, their young ones come out of the eggs. Such animals are called egg-laying animals. Fish, snakes, turtles, frogs, birds etc. are egg-laying animals. The egg consists of a hard protective outer shell. Inside the shell in the centre is a yellow portion called the yolk.
Animals that lay eggs, with very little or almost no other development within the mother, are called oviparous. Both reptile eggs and bird eggs laid outside water have a protective shell, either inflexible or flexible.
Many animal groups have some species that lay eggs and others that birth live young, including fish, amphibians, and yes, even mammals, says Whit Gibbons, evolutionary biologist at the University ...
Animals that lay eggs are known as oviparous animals and include fish, birds, reptiles and insects. These types of animals have little to no other development within the mother. Mammals that lay eggs instead of giving birth are known as monotremes. Animals that lay eggs are known as oviparous animals and include fish, birds, reptiles and insects.
A look at the many different places that animals lay eggs - maleo fowl lay eggs in the sand, swifts lay eggs behind a waterfall, fairy terns lay eggs on a branch, mosquitos lay eggs on the water ...
The egg is the organic vessel containing the zygote in which an embryo develops until it can survive on its own; at which point the animal hatches. An egg results from fertilization of an egg cell. Most arthropods, vertebrates (excluding mammals), and mollusks lay eggs, although some, such as scorpions do not.
Pupils should understand where eggs come from and appreciate the differences between animals that lay eggs and those that don’t. Mammals give birth to live young, are warm-blooded (can regulate their own body temperature) and are vertebrates with internal skeletons.; Birds are warm blooded and lay eggs.Most have feathers and can fly.
Some birds lay only one or two fertilized eggs, while others lay several -- the number of eggs is the "clutch." Generally birds who lay one or two eggs, like the little tinamou, don't survive for long in the wild. These birds spend a lot of time caring for their young to help the species stay alive. In contrast, birds who lay 10 or more eggs ...