Unlike mammals, birds incubate their eggs outside their body. The underlinedword means

Although it is often assumed that one of the essential characteristics of mammals is that they give live birth to their young, there are actually two species of egg-laying _____ Ornithorhynchus anatinus, more commonly known as the duck-billed platypus, and Tachyglossus aculeatus, also called a short-beaked echidna or spiny anteater.18Mark for ReviewABCWhich choice completes the text so that it conforms to the conventions of Standard English?Amammals:Bmammals.Cmammals;Dmammals

Unusual Bird ParentingBirds have a reputation as excellent parents. They expend a great deal of effort in building nests in which to lay their eggs. They patiently incubate the eggs, keeping them warm and safe until they hatch. Birds also bring food to their newly hatched offspring until the baby birds are independent. However, some unusual birds, known as brood parasites, don't provide any parental care for their young. Perhaps the most famous brood parasite is the cuckoo. Instead of building a nest, the cuckoo lays her eggs in the nest of another species with similar-looking eggs. The female cuckoo simply removes an egg laid by the host female, lays her own egg, and then leaves, expecting the host bird to care for the imposter.What is the main, or central, idea of the passage?

______ are the mammalian group that lay eggs.Group of answer choicesEutheriansTunicatesMonotremesPrimatesMarsupials

Ornithology is to Birds as Entomology is to:MammalsBirdsInsectsPlants

In humans _________matured egg is released into________.