What Is A Simple Definition Of A Mammal? Mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother. In addition to these characteristic milk glands, mammals are distinguished by several other unique features. What are the 7 characteristics of
What Is A Vertebrate And An Invertebrate? Vertebrates are animals that have a backbone inside their body. The major groups include fish, amphibians, reptiles, birds and mammals. Invertebrates don’t have a backbone. They either have a soft body, like worms and jellyfish, or a hard outer casing covering their body, like spiders and crabs. What
What Is The Difference Between Mammals And Vertebrates? Mammals differ from other vertebrate animals in that their young are nourished with milk from special mammary glands of the mother. Mammals are distinguished by several other unique features. … Mature red blood cells (erythrocytes) in all mammals lack a nucleus; all other vertebrates have nucleated red
What Is The Difference Between Lower And Higher Invertebrates? The invertebrate phyla are usually referred to as lower and higher invertebrates. The lower invertebrates are simple in body organisation and generally smaller in size. … On the other hand, the higher invertebrates are generally larger in size and possess a complex body organisation. What is
What Is The Average Lifespan Of Animals? Animal Average Life Span of Animal (in years) Cow22 Crocodile45 Deer35 Dog22 What is the average lifespan of mammals? The typical rate of extinction differs for different groups of organisms. Mammals, for instance, have an average species “lifespan” from origination to extinction of about 1 million years, although
What Is The Body Covering Of Invertebrates? A: Invertebrates have various ways of supporting their body. Some have an exoskeleton, which is a rigid outer casing that covers the body of arthropods. The exoskeleton protects the internal organs, and joints within it help the animal move. Many mollusks have shells that provide structure and protection.
What Is The Evolution Of Invertebrates? It was the first step in the evolution of organs and organ systems. At first, invertebrates developed tissues from just two embryonic cell layers. There was an outer cell layer called ectoderm and an inner cell layer called endoderm. The two cell layers allowed different types of tissues to
What Kind Of Digestive System Do Crayfish Have? Digestive System: Crayfish are carnivorous scavengers lending to the fact that their digestive systems are relatively simple. As seen in the external anatomy, crayfish of complex mouthparts to aid in the feeding process. Upon entering the mouth, the food travels down the short esophagus into the stomach.
What Is A Group Of Warm Blooded Animals With Hair Or Fur? Mammals are a group of animals (vertebrates) that have backbones and hair or fur. They are warm-blooded (endothermic), and they have four-chambered hearts. Which group of animals has fur or hair? Mammals have hair or fur, birds have feathers, reptiles have dry scales,
What Type Of Circulatory System Do Jellyfish Have? Exchange of fluids is assisted by the pulsing of the jellyfish body. Simple animals consisting of a single cell layer such as the (a) sponge or only a few cell layers such as the (b) jellyfish do not have a circulatory system. Instead, gases, nutrients, and wastes