Which Of The Following Characteristics Is Not True Of Most Animal Groups?
ten.1: Animal Characteristics
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Is an insect an fauna?
Of course it is. Is a snail an insect? No, snails are mollusks. Detect the large "human foot" that allows move, and the antennas are obvious. Actually, a snail's eyes are on the two long projections on its caput, and the projections are called eyestalks. These are characteristics of this animal.
Characteristics of Animals
Animals are a kingdom of multicellular eukaryotes. They cannot make their own food. Instead, they get nutrients past eating other living things. Therefore, animals are heterotrophs.
Animal Cells
Like the cells of all eukaryotes, animal cells have a nucleus and other membrane-bound organelles (meet Figure below). Unlike the cells of plants and fungi, beast cells lack a jail cell wall. This gives animal cells flexibility. It lets them accept on different shapes then they can become specialized to exercise particular jobs. The homo nerve jail cell shown in Figure below is a good example. Its shape suits its part of transmitting nerve impulses over long distances. A nerve prison cell would be unable to accept this shape if information technology were surrounded by a rigid cell wall.
Animal Cell. The shape of an animal cell is not constrained by a rigid cell wall. A bacterial cell is shown higher up for comparison.
Human Nerve Jail cell. A human nerve prison cell is specialized to transmit nerve impulses. How practise y'all think the cell's shape helps it perform this office?
Fauna Structure and Function
Animals not merely have specialized cells. Most animals besides accept tissues and organs. In many animals, organs form organ systems, such as a nervous system. Higher levels of arrangement allow animals to perform many circuitous functions. What can animals do that most other living things cannot? Nigh animals share these characteristics: sensory organs, move, and internal digestion. All of them are illustrated in Figure beneath.
- Animals tin can notice environmental stimuli, such equally low-cal, audio, and touch. Stimuli are detected by sensory nerve cells. The data is transmitted and processed by the nervous system. The nervous system, in plow, may straight the torso to reply.
- All animals tin can move, at least during some phase of their life bicycle. Muscles and nerves piece of work together to let motion. Being able to motility lets animals actively search for food and mates. It also helps them escape from predators.
- Virtually all animals take internal digestion of food. Animals consume other organisms and may use special tissues and organs to digest them. (Many other organisms blot nutrients directly from the environs.)
Near animals share these characteristics: sensory organs, movement, and internal digestion.
Animal Life Bicycle and Reproduction
Many animals accept a relatively elementary life cycle. A general beast life bike is shown in Effigy below. Most animals spend the majority of their life as diploid organisms. Only about all animals reproduce sexually. Diploid adults undergo meiosis to produce sperm or eggs.Fertilization occurs when a sperm and an egg fuse. The zygote that forms develops into an embryo. The embryo eventually develops into an adult.
Beast Life Cycle. An animate being life cycle that includes but sexual reproduction is shown here. Some animals also reproduce asexually. How does the animal life bicycle compare with the life bicycle of a constitute?
Summary
- Animals are multicellular eukaryotes that lack prison cell walls.
- All animals are heterotrophs.
- Animals have sensory organs, the ability to move, and internal digestion. They likewise have sexual reproduction.
Review
- Identify traits that characterize all animals.
- State 1 way that animal cells differ from the cells of plants and fungi. What is the significance of this difference?
- Describe animate being digestion.
- Draw a full general animal life wheel.
Source: https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book:_Introductory_Biology_%28CK-12%29/10:_Animals/10.01:_Animal_Characteristics
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