what are the four characteristics animals can be identified?
447856
Most animals share these characteristics: sensory organs, movement, and internal digestion. All of them are illustrated in Figure below. Animals can detect environmental stimuli, such as light, sound, and touch. Stimuli are detected by sensory nerve cells.
1189120
['All animals are made up of cells that do not have cell walls.', 'All animals are multicellular organisms.', 'Most animals reproduce sexually. ... ', 'All animals are capable of self-propelled motion at some point in their lives.', 'All animals are heterotrophic and must consume other organisms for energy.']
354407
['Feathers. Feathers are an obvious trait. ... ', 'Wings. All birds have wings, but not all birds fly. ... ', 'Beaks or Bills. Beaks or bills are another characteristic of birds. ... ', 'Laying Eggs. All birds lay eggs. ... ', 'Adapted Skeleton.']
1141294
['Hair and Fur. ... ', 'Mammary Glands. ... ', 'Single-Boned Lower Jaws. ... ', 'One-Time Tooth Replacement. ... ', 'Three Bones in the Middle Ear. ... ', 'Warm-Blooded Metabolisms. ... ', 'Diaphragm. ... ', 'Four-Chambered Hearts.']
435471
['They have a star-like appearance and are spherical or elongated.', 'They are exclusively marine animals.', 'The organisms are spiny-skinned.', 'They exhibit organ level of organization.', 'They are triploblastic and have a coelomic cavity.', 'The skeleton is made up of calcium carbonate.']
876444
['All animals are multicellular, eukaryotic heterotrophs —they have multiple cells with mitochondria and they rely on other organisms for their nourishment.', 'Adult animals develop from embryos: small masses of unspecialized cells.', 'Simple animals can regenerate or grow back missing parts.']
163031
['They possess an exoskeleton.', 'They have jointed appendages.', 'Their body is segmented.', 'They are bilaterally symmetrical.', 'They possess an open circulatory system.']
176669
Two characteristics are used to define the mammal class. They are mammary glands and body hair (or fur). Female mammals have mammary glands. The glands produce milk after the birth of offspring.
1323859
['The four general characteristics of specific defenses include. specificity. ... ', 'Cellular immune response. - Cytotoxic T cells (aka CD8, MHC I dependent): Recognize and kill altered self-cells. ... ', 'Tc Cells: ... ', 'Th cells: ... ', 'Antibody-Mediated immunity. ... ', 'Active immunity. ... ', 'Passive immunity. ... ', 'Active: Gets sick, then better.']
58051
Four characteristics define a population. When scientists think about population dynamics, they consider four major characteristics. These characteristics include population size, population density, population spacing, and age structure. is the number of individuals in a population at a given time.
893028
['THEY HAVE TWO EXTINCT RELATIVES. ... ', "THEY'RE VEGETARIAN CARNIVORES. ... ", "THEY'RE SLIGHTLY BIGGER THAN A DOMESTIC CAT. ... ", 'THEY HAVE A FALSE THUMB. ... ', "THEY'RE ESCAPE ARTISTS. ... ", 'ONE ESCAPE LED TO SOMETHING CALLED THE RED PANDA EFFECT. ... ', "THERE'S AN INTERNET BROWSER NAMED AFTER THEM."]
667290
['Four limbs.', 'External ears.', 'Movable eyelids.', 'A short neck.', 'A long tail, which they can shed in order to escape from predators.', 'They eat insects.']
1192631
One of the main characteristics that is used to distinguish one class of animals from another is type of skin covering. Mammals have hair or fur, birds have feathers, reptiles have dry scales, amphibians have soft, moist skin, and fish have wet, slimy scales.
290222
Mammals have four limbs and produce amniotic eggs. The mammal class is defined by the presence of mammary glands and hair (or fur). Other traits of mammals include sweat glands in their skin, alveoli in their lungs, a four-chambered heart, and a brain covering called the neocortex.
139077
['Animals are multicellular.', 'Animals are heterotrophic, obtaining their energy by consuming energy-releasing food substances.', 'Animals typically reproduce sexually.', 'Animals are made up of cells that do not have cell walls.']
890054
['Resemble bony fish and terrestrial vertebrates in having jaws and paired appendages.', 'An electroreceptive system is well developed.', 'Endoskeleton entirely cartilaginous.', 'No swim bladder or lung.']
591754
Each breed of dog may have its own special traits—things like fluffy fur, floppy ears, curly tails, or spots.