An animal that has an interval body cavity completely lined with mesoderm is cal
ID: 98122 • Letter: A
Question
An animal that has an interval body cavity completely lined with mesoderm is called a(n) ___ In all deuterostomes, by contrast, the cells divide parallel to and at right angles to the polar axis. This pattern is called. ___ Two outwardly dissimilar groups, the ___ and the chordates together with a few other small phyla, constitute the deuterostomes. What three characteristics are common to all chordates? Why don't we find all three of these chordate characteristics in our own bodies? From you knowledge of the evolution of invertebrate and vertebrates provide evidence for or against the statement" "Evolution adds onto or modifies what already exists?" Explain. Discuss three major changes in structure and functions are seen in terrestrial groups as compared with aquatic groups? Cilia is associated with the feeding apparatus of ___ a) annelids b) coral animals c) tapeworms d) sponges Which extant chordates are postulated to be most like the earliest chordates in appearance? a) nematodes b) adult tunicates c) lancelets d) chondrichthyansExplanation / Answer
14) Coelomates
Coelomates animals in which the internal body cavity is lined by peritoneum of mesoderm
15) Radial cleavage
This type of division occurs ate early embryo stage where zygote develops into hollow ball of cells called as blastula
16) Deuterostomes contains about 7000 living species divided into subphylum Chordates and echinodermata which are largest phylum with terrestrial n fresh water representatives.
17) Notochord
Notochord a flexible, rod-shaped structure that is found in the embryonic stage of all chordates and also in the adult stage of some chordate species.
Post anal Tail
The post-anal tail is a posterior elongation of the body, extending beyond and provide a source of locomotion in aquatic species
Dorsal Hollow nerve chord
Dorsal hollow nerve cord derives from ectoderm that rolls into a hollow tube during development.
18) Notochord is all extends to the body of animal which helps as supportive organism for animal body but humans have vertebrate column which do the same function of notochord in chordates.
While humans have developed nervous system with spinal cord and brain doing the same of function of Dorsal Hollow nerve chord in chordates.
Chordates use post anal tail for their locomotion but humans have limbs for their movement and locomotion
19) Most of invertebrates hade simple nervous system but with the evolution in search of food and locomotion complex nervous system developed from the time which showed how evolution imposes changes and modifies organs other significant change is invertebrates were marine used to respire by gills in water but with vertebrates development lungs were evolved to respire in open air through evolution.
20) Marine organism uses gills to respire but terrestrial organism have evolved lungs for their respiration. Other significant difference can be seen is the development of limbs in terrestrial organism while most of marine organism uses tail and fins for their movement and locomotion.
21)Sponges uses cilia for locomotion and sensing the food material
22)Lancelets are also known as amhioxi or fish like chordates with close resemblance to vertebrates.