Recent questions tagged ch4

Regarding Reptilia : 1. In this class the mode of locomotion is creeping or crawling. 2. In Latin, repere or reptum, to creep or crawl hence the name. Regarding 1 and 2:

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Regarding Amphibia, heart is :

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Regarding Amphibia, respiration is :

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Regarding Amphibia, which of the following open into cloaca :

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Class – Amphibia : 1. The eyes have eyelids. 2. A tympanum represents the ear. Regarding 1 and 2:

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Regarding Amphibia : 1. They can live in aquatic as well as terrestrial habitats 2. So they are called amphibians Regarding 1 and 2:

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Choose the odd one out:

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Regarding Osteichthyes : Skin is covered with

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Regarding Osteichthyes : 1. They have three pairs of gills 2. Gills are covered by an operculum on each side. Regarding 1 and 2:

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Regarding Osteichthyes : 1. Their body is streamlined. 2. Mouth is mostly terminal. Regarding 1 and 2:

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Osteichthyes includes both

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Choose the odd one out:

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Choose the odd one out:

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Choose the odd one out:

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Choose the odd one out:

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Class – Chondrichthyes : 1. They have external fertilisation 2. Many of them are viviparous. Regarding 1 and 2:

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Class – Chondrichthyes : 1. Sexes are separate. 2. In males pelvic fins bear claspers. Regarding 1 and 2:

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Regarding Classes Chondrichthyes & Osteichthyes of Pisces: Assertion (A): They are called cold-blooded animals. Reason (R): They are aquatic (marine or fresh water) and as they in continous contact with water their blood is cold. Regarding (A) and (R) :

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Class - Chondrichthyes : 1. Some of them have electric organs (e.g., Trygon) 2. Some possess poison sting (e.g., Torpedo). Regarding 1 and 2:

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In Chondrichthyes, Heart is

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Regarding Class - Chondrichthyes : Assertion (A): In Chondrichthyes, air bladder is absent. Reason (R): They have to swim constantly to avoid sinking. Regarding (A) and (R) :

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Class – Chondrichthyes : 1. The skin is tough, containing minute placoid scales. 2. Teeth are modified placoid scales Regarding 1 and 2:

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In Chondrichthyes, Gill slits are

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Class – Chondrichthyes : 1. Mouth is located dorsally. 2. Notochord is present only in embryonic life. Regarding 1 and 2:

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Cyclostomata includes:

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Class – Cyclostomata : 1. Their larvae udergo metamorphosis in fresh water 2. After metamorphosis, they return to the ocean Regarding 1 and 2:

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Class - Cyclostomata : 1. They bear 6-12 pairs of gill slits for respiration. 2. Cyclostomes have a circular mouth without jaws for sucking. Regarding 1 and 2:

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1. All living members of the class Cyclostomata are ectoparasites 2. Fishes are their hosts. Regarding 1 and 2:

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Division Gnathostomata includes all except:

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Super Class Tetrapoda includes all except:

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vertebrates have a ventral muscular heart with :

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1. All vertebrates are not chordates 2. But all chordates are vertebrates. Regarding 1 and 2:

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1. The members of subphylum Vertebrata possess notochord during the embryonic period. 2. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Regarding 1 and 2:

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Ascidia, Branchiostoma, Doliolum, Salpa

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Choose the odd one out:

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Protochordates are : 1. Subphyla Tunicata and Cephalochordata 2. They may be marine or terrestrial. Regarding 1 and 2:

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Protochordates are :

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Phylum Chordata is divided into subphyla:

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1. Chordates : A post- part (tail) is present. 2. Non-chordates : Post- tail is absent. Regarding 1 and 2:

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Regarding position of heart :- 1. In Chordates : dorsal 2. In Non-chordates : ventral (if present).

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1. Chordates : Gill slits are absent. 2. Non-chordates : Pharynx perforated by gill slits. Regarding 1 and 2:

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Regarding Central nervous system :- 1. In Chordates : dorsal, hollow and single. 2. In Non-chordates : ventral, solid and double.

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Members of Phylum – Chordata : (i) possess a post **** tail (ii) possess a closed circulatory system Regarding (i) and (ii):

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Members of Phylum – Chordata are

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Animals belonging to phylum Chordata are fundamentally characterised by the presence of

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Regarding Phylum - Hemichordata : choose the appropriate option

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Regarding Phylum - Hemichordata : it consists of marine animals

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Regarding Phylum – Echinodermata : 1. Fertilisation is usually external. 2. Development is indirect with free-swimming larva. Regarding 1 and 2 :

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Regarding Phylum – Echinodermata : 1. Reproduction is sexual. 2. Fertilisation is always internal. Regarding 1 and 2 :

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Regarding Phylum – Echinodermata : 1. The most distinctive feature of echinoderms is the presence of water vascular system. 2. An excretory system is absent Regarding 1 and 2 :

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