Question

What are common characterstics of kingdom Animalia ?​

Answer 1

★ Animals show the following characteristics:

• The animals are multicellular eukaryotes.

• Animal cell lacks a cell wall.

• They show heterotrophic mode of nutrition.

• Most of them are capable of locomotion or body movements, however some are sedentary (eg - sponges).

• They possess nervous system and most of the animals have specialized sense organs for co-ordination of different systems.

• Reproduction is mainly sexual by the formation of gametes.

Answer 2

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➸They are multicellular organisms which do not possess chlorophyll.

➸They are eukaryotic organisms.

➸Cell wall is absent.

➸Mode of nutrition is heterotrophic i.e. they depend on other organisms for food.

➸They have muscle cells due to which they have the capability to contract and relax the body parts.

➸Reproduction is sexual. However, asexual reproduction is also found in lower forms.

➸During development, multicellular embryo is formed from the zygote.

➸They require oxygen for aerobic respiration.

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➟An animal must have several characteristics to be an animal: it has a body built of many cells, it gets the energy necessary for life by eating other organisms, it has the ability to move, and can sense its environment.

➟Animals are a natural group, or clade, descended from a shared common ancestor.

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