biology help?

Question

any vertebrate with hair belongs to the class Mammalia. Is there any other single characteristic that will enable us to place a vertebrate in its class? and what class would an animal having this characteristic be in?

How about a characteristic that all invertebrates have?

Arthropods?




What phylum and class do humans belong?

Answer 1

The one big character for Mammalia is milk production - mammary glands. Platypusses are mammals because they feed their young on milk, even though they lay eggs

All invertebrates have no notochord

Arthropods have exoskeleton, jointed limbs, ventral solid CNS.

Phylum Chordata, class Primates.

Answer 2

The vertebrate classes are fish, amphibians, reptiles, birds, and mammals. Fish do not have an oustanding characteristic; for example, many invertebrate creatures possess gills, and scales are also not unique to fish. Amphibians and retiles are defined by sets of characteristics, and neither can be defined by a single one. However, all vertebrates with feathers are birds.

All invertebrates share a lack of a spinal column. Any animal without a spinal column is an invertebrate.

All arthropods have jointed appendages. Any invertebrate with jointed appendages is an arthropod.

Human beings are members of phylum Chordata and class Mammalia.

Answer 3

Class Mammalia do have hair or fur, produce milk (mammary glands hence the name) and give live birth (except for two species).
All invertebrates lack a back bone
Arthropods mean jointed appendages, have an exoskeleton
Humans: Kingdom Animalia, Phylum Chordata and you state the class already: Mammalia

Answer 4

All jawless fish are vertebrates that belong to the class Agnatha. They are placed in that class solely only the chararcteristic of no jaw.
Humans belong to the phylum Chorodata and class Mammalia.
All arthropods are covered by a hard exoskeleton made of chitin.
All invertebrates lack a spine.

Answer 5

All Mammalia with republican party affiliation are of the family Idiota. Examples: elephants, dubya