Which class has the largest number of animals 1 point fishes reptiles insects mammals?
Answer. The class named Insecta contains the largest animal number.
Which class has the largest number of animals *?
In terms of numbers of species, insects certainly represent the largest percentage of the world’s organisms. There are more than 1 million species of insects that have been documented and studied by scientists.
Which kingdom has the largest number of animals?
The animal kingdom is the largest kingdom with over 1 million known species.
Are mammals the largest group of animals?
What is the largest group of mammals? Rodents are the largest group of mammals, constituting almost half of the class Mammalia’s species.
Which of the following characters is not typical to class Mammalia?
Lungs are alveolar in nature comprised of a number of small bags called alveoli. All mammals whether camel or whale or giraffe or Man have seven cervical vertebrae. Mammals have 12 pairs of cranial nerves. Thus, the correct answer is option D.
Which of the following is a vertebrate?
Vertebrates are animals that have a backbone or spinal column, also called vertebrae. These animals include fish, birds, mammals, amphibians, and reptiles.
Which characteristic is distinct to mammals?
According to the University of Michigan Museum of Zoology, there are only three characteristics unique to mammals. The three characteristics are mammary glands, hair and three middle ear bones. Other characteristics often thought to be unique to mammals are found in other species including birds, insects and reptiles.
Why animals are named as vertebrata?
A vertebrate is an animal with a spinal cord surrounded by cartilage or bone. The word comes from vertebrae, the bones that make up the spine. Animals that are not vertebrates are called invertebrates. Vertebrates include birds, fish, amphibians, reptiles, and mammals.
What are the 8 classes of vertebrates?
Terms in this set (8)
- agnatha. -jawless fish. -mouth is modified as a sucker. …
- placoderms. -armored fish. -body covered in heavy armor plates. …
- chondrichthyes. -cartilage fish. -skeletons made of cartilage. …
- osteichthyes. -bony fish. …
- amphibians. -smooth skin. …
- reptiles. -scaly skin. …
- aves. -birds. …
- mammals. -have fur or hair.
Are there 5 or 6 kingdoms?
Until recently the system devised by Robert Whittaker in 1968 was widely adopted. Whittaker’s classification scheme recognizes five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia.
Why are mammals so named?
The word “mammal” is modern, from the scientific name Mammalia coined by Carl Linnaeus in 1758, derived from the Latin mamma (“teat, pap”). … If Mammalia is considered as the crown group, its origin can be roughly dated as the first known appearance of animals more closely related to some extant mammals than to others.
What are the 5 kingdoms?
Living things are divided into five kingdoms: animal, plant, fungi, protist and monera. Living things are divided into five kingdoms: animal, plant, fungi, protist and monera.
What animal has 3 hearts?
The giant Pacific octopus has three hearts, nine brains and blue blood, making reality stranger than fiction. A central brain controls the nervous system. In addition, there is a small brain in each of their eight arms — a cluster of nerve cells that biologists say controls movement.
Is a penguin a mammal?
Penguins are fish, mammals, or amphibians because they live in water, on land, or both. Penguins are birds, even though they spend time on land and in water. Their motion in the water more closely resembles flying than the swimming motion used by other animals. Polar bears eat penguins.
What is the smallest group of mammals?
The smallest mammal in the world is the bumblebee bat (Craseonycteris thonglongyai), weighing in at just barely 2 grams and measuring 1 to 1.3 inches in length, about the size of a large bumblebee.