Phylum-Chordata -> Urochordata -> Cephalochordata -> Vertebrata || 1st ostacodermi || 2nd cycloshomata

Phylum chordata || Sub-Phylum Urochordata || Sub-Phylum Cephalochordata

Phylum Chordata-General Characters 2 || Sub phylum Urochordata & Cephalochordata

Phylum Chordata|Classification|Subhylum -Urochordata

Which of the following statements are true for the phylum-Chordata? (a) In urochordata notochord extends from head to tail and it is present throughout their life. (b) In vertebrata notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata,Tunicata and Cephalochordata.

Discussion Class-3 Phylum Mollusca || Echinodermata || Hemichordata || Chordata || Cephalochordata || Pisces || Superclass

Sub Phylum Vertebrata-General Characters and Classification 2 || Class Cyclostomata

One-half of a certain number is equal to 65% of the 2nd number. Find the ratio of 1st to 2nd number.

In an election a voter can vote for 2 candidates at a time. Half of the voters give their 1^(st) vote to candidate A and the 2nd vote to candidate B, C and D in ratio 3:2 : 1. Half of the rest voters give their 1^(st) vote to B and their 2^(nd) vote to C and D in ratio 2:1. Half of the rest of the voters give their 1^(st) vote to C and D in ratio 1:1.840 voters do not cast their vote. Find the number of votes each candidate got.