notochord

Phylum: Chordata, its classification and characteristics

by

The characteristics of this phylum are as follows: Presence of notochord Presence of dorsal hollow (tubular) nerve cord. Presence of pharyngeal gill slits. Post anal tail is present. Image source: kullabs This phylum is classified into four sub-phylum. They are as follows: Sub- phylum 1: Hemichordata Marine animals. Simple worm-like soft bodied animal. Remain buried … Read more

Differences between vertebrates and invertebrates

by

S.N Vertebrates Invertebrates 1. They have backbone or vertebral column. They do not have backbone or vertebral column. 2. They are the most organized animals on the earth. They are not organized as vertebrates. 3. They consist of single phylum. They consist of eight phylum. 4. They have internal skeleton. Internal skeleton absent. 5. They … Read more