How many from the following phylum has external fertilisation with indirect development ?
{Porifera, Ctenophora , Echinodermata, Hemichordata }

How many ketones of the following has hex root word ?

Read the following four statements (I - IV) I. All mammals exclusively respire by using lungs except Balaenoptera. II. In Aves, the skin is dry without any glands except the sudorific gland at the base of the tail. III. Chameleon is a camouflaged tree lizard with a prehensile tail. IV. Amphibia is the only tetrapod vertebrate which has external fertilization with indirect development . How many statement is / are correct from the above ?

Read the following four statements (I - IV) I. All mammals exclusively respire by using lungs except Balaenoptera. II. In Aves, the skin is dry without any glands except the sudorific gland at the base of the tail. III. Chameleon is a camouflaged tree lizard with a prehensile tail. IV. Amphibia is the only tetrapod vertebrate which has external fertilization with indirect development . How many statement is / are correct from the above ?

Water vascular system is the characteristic of which group of the following: a) Porifera b) Ctenophora c) Echinodermata d) Chordata

Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata

Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata