Do chordates have a dorsal hollow nerve cord?
Do chordates have a dorsal hollow nerve cord?
The dorsal hollow nerve cord derives from ectoderm that rolls into a hollow tube during development. In chordates, it is located dorsally (at the top of the animal) to the notochord. In contrast to the chordates, other animal phyla are characterized by solid nerve cords that are located either ventrally or laterally.
How do the notochord and dorsal nerve cord differ?
Notochord is a skeletal rod, and nerve cord is a solid strand of nervous tissue. The main difference between notochord and nerve cord is that notochord belongs to the skeleton whereas nerve cord belongs to the central nervous system of chordates. Notochord occurs between the nerve cord and the central nervous system.
What animals have a dorsal hollow nerve cord?
Chordates are animals that have a notochord, post-anal tail, dorsal hollow nerve cord, and pharyngeal slits. Chordates include all vertebrates and some invertebrates.
What are the three different types of mammals?
Extant mammals are divided into three subclasses based on reproductive techniques (monotremes, marsupials, and placentals) consisting of 27 orders. Within each order, families are organized by taxonomic relationship and distinguished by their genus and species.
What are the five types of mammals?
However, the commonly accepted types of mammals are grouped into three major categories based on how mammals reproduce their babies:
- Types of Mammals. Monotremes Mammals. Marsupial Mammals.
- Characteristics of Mammals. Warm-blooded. Vertebrates.
- Monotremes Mammal Orders.
- Marsupial Mammal Orders.
- Placental Mammal Orders.
Which is smallest bird?
Bee Hummingbird
Which is largest bird in India?
Great Indian bustard
Which bird is banned in India?
The exotic pet trade in India has grown with the main demand for birds, particularly those belonging to the parrot family including macaws and cockatoos. Since there is a complete ban on trade in all wild Indian bird species, interest has shifted to exotic birds, which has led to some serious conservation concerns.
Which is the largest flying bird in the world?
Wandering albatross