Home
Class 11
BIOLOGY
Which of the following statements is/are...

Which of the following statements is/are not true?
(a) In urochordata, notochord is present in larval tail
(b) In cephalochordata, notochord extends from head to tail region.
( c) Branchiostoma belongs to hemichordata
(d) Only one class of living members, class Cyclostomata represents the super class agnatha

A

(a), (b), (d) only

B

( c), (d), (a) only

C

( c) only

D

(a), (d) only

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the statements provided are not true, we will analyze each statement one by one: 1. **Statement (a)**: "In urochordata, notochord is present in larval tail." - This statement is **true**. In urochordates, the notochord is indeed present in the larval stage, specifically in the tail region. 2. **Statement (b)**: "In cephalochordata, notochord extends from head to tail region." - This statement is also **true**. In cephalochordates, the notochord runs from the head to the tail and persists throughout the organism's life. 3. **Statement (c)**: "Branchiostoma belongs to hemichordata." - This statement is **not true**. Branchiostoma is actually a member of the cephalochordates, not hemichordates. Hemichordata is a separate phylum. 4. **Statement (d)**: "Only one class of living members, class Cyclostomata represents the superclass agnatha." - This statement is **true**. The superclass Agnatha includes jawless fish, and Cyclostomata is the only class within this superclass that includes living members, such as lampreys and hagfish. After evaluating all the statements, we find that the only incorrect statement is **(c)**. ### Final Answer: The statement that is not true is **(c)**: "Branchiostoma belongs to hemichordata."
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following statements is/are not true A. In Urochordata, notochord is present only in larval tail. B. In Cephalochordata, notochord extends from head to tail region. C. Branchiosoma belongs to Hemichordata D. Only one Class of living members, Class Cyclostomata represents the Super Class Agnatha.

In which sub-phylum Notochord extends from head to tail region and persistent throughout their life?

Consider the following statements :- (1) Protochordates are exclusively marine (2) In cephalochordates, Notochord extends from head to tail region (3) In urochordates, Notochord is present only in larval tail (4) Cranium and vertebral column are bony in cyclostomates Which of the above statement is/are correct?

In which one of the following protochordates notochord present only in the tail of larva?

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.

In the sub-phylum (_i_) notochord is present only in the larval tail, while in (_ii_), it extends from head to tail region and is persistent throughout their life. In (_iii_) class of vertebrate notochord is replaced by certilaginous vertebral column and (_iv_) class of vertebrate the notochord is replaced by bony vertebral column. select the option which is correct for all (i)-(iv) blanks.

Which of the following statements is/are correct or incorrect regarding Class Amphibia? (i) Body is divisible into head and trunk. Tail is present in some amphibians. (ii) Show respiration by gills, lungs and through skin. (iii) Has scales in all its members. (iv) Can lead dual life (aquatic and terrestrial) (v) Has eyelids.

Which of the following statements is not correct for the R by a Rb if and only if b lives within one kilometer from a (a) R is reflexive (b) R is symmetric (c) R is not anti-symmetric (d) None of the above