Which of the following options does correctly represent the characteristic features of phylum Annelida?

NEET-(Oct)2020 [Animal-Kingdom] [class-xi ]

• Triploblastic, unsegmented body and bilaterally symmetrical.
• Triploblastic, segmented body and bilaterally symmetrical.
• Triploblastic, flattened body and acoelomate condition.
• Diploblastic, mostly marine and radially symmetrical.
Correct Option: B  [ Triploblastic, segmented body and bilaterally symmetrical. ]

Remark:

Match the following group of organisms with their respective distinctive characteristics and select the correct option :

NEET-(Oct)2020 [Animal-Kingdom] [class-xi ]

• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
• (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
• (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Correct Option: A  [ (A)-(III), (B)-(IV), (C)-(I), (D)-(II) ]

Remark:

Match the following columns and select the correct option:

NEET-(Oct)2020 [Animal-Kingdom] [class-xi ]

• (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
• (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Correct Option: C  [ (A)-(IV), (B)-(I), (C)-(II), (D)-(III) ]

Remark:

All vertebrates are chordates but all chordates are not vertebrates, why?

NEET-(Oct)2020 [Animal-Kingdom] [class-xi ]

• Notochord is replaced by vertebral column in adult of some chordates.
• Ventral hollow nerve cord remains throughout life in some chordates.
• All chordates possess vertebral column.
• All chordates possess notochord throughout their life.
Correct Option: A  [ Notochord is replaced by vertebral column in adult of some chordates. ]

Remark:

Bilaterally symmetrical and acoelomate animals are exemplified by:

NEET-(Sept)2020 [Animal-Kingdom] [class-xi ]

• Ctenophora
• Platyhelminthes
• Aschelminthes
• Annelida
Correct Option: B  [ Platyhelminthes ]

Remark:

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.

NEET-(Sept)2020 [Animal-Kingdom] [class-xi ]

• (D) and (C)
• (C) and (A)
• (A) and (B)
• (B) and (C)
Correct Option: D  [ (B) and (C) ]

Remark:

Match the following columns and select the correct option.

NEET-(Sept)2020 [Animal-Kingdom] [class-xi ]

• A-II, B-III, C-IV, D-I
• A-III, B-IV, C-I, D-II
• A-IV, B-II, C-III, D-I
• A-I, B-IV, C-III, D-II
Correct Option: A  [ A-II, B-III, C-IV, D-I ]

Remark:

Match the following columns and select the correct option.

NEET-(Sept)2020 [Animal-Kingdom] [class-xi ]

• A-I, B-III, C-II, D-IV
• A-IV, B-I, C-II, D-III
• A-III, B-II, C-I, D-IV
• A-II, B-I, C-III, D-IV
Correct Option: B  [ A-IV, B-I, C-II, D-III ]

Remark:

Match the following organisms with their respective characteristics:

NEET-2019 [Animal-Kingdom] [class-xi ]

• (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
• (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
• (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Correct Option: D  [ (A)-(III), (B)-(IV), (C)-(II), (D)-(I) ]

Remark:

Consider following features:
(A) Organ system level of organisation
(B) Bilateral symmetry
(C) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics.

NEET-2019 [Animal-Kingdom] [class-xi ]

• Annelida, Arthropoda and Mollusca
• Annelida, Arthropoda and Chordata
• Arthropoda , Mollusca and Chordata
• Annelida, Mollusca and Chordata
Correct Option: B  [ Annelida, Arthropoda and Chordata ]

Remark: