Which of the following is a characteristic feature of all chordates?
All chordates exhibit bilateral symmetry, though not all of them develop vertebrae.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Arthropoda
#animal features
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Which of the following is a correct feature of reptiles?
Reptiles lay amniotic eggs, which provide protection and a stable environment for the developing embryo.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Arthropoda
Which of the following features is found in both birds and reptiles?
Both birds and reptiles have scales on their body, indicating their evolutionary connection.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Aschelminthes and Annelida
Which of the following features is incorrect regarding mammals?
Mammals have a complete double circulation, meaning oxygenated and deoxygenated blood do not mix.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Porifera and Cnidaria
Which of the following features is incorrect about mammals?
Mammals are warm-blooded (homeothermic), not cold-blooded (poikilothermic).
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Porifera and Cnidaria
Which feature is absent in all members of Porifera?
Porifera represent morphologically simplest multicellular animals at cellular grade organization lacking true tissues defined by basement membranes, no organs, no symmetry, no nervous system, no muscle, no germ layers, no gut exclusively aquatic mostly marine but few freshwater Spongillidae sessile filter feeders. Body wall contains outer pinacoderm inner choanoderm of collar cells choanocytes driving water through aquiferous system of pores canals chambers mesohyl with amoebocytes spicules silica or carbonate and spongin fibers. Reproduction both asexual budding gemmules and sexual with larva
Ref: NCERT Class 11 Biology, Chapter 4: Porifera no true tissues; Campbell Biology Chapter 33
