Choose the correct statement.
Correct answer: B. All cyclostomes do not possess jaws and paired fins
- A. All mammals are viviparous
- B. All cyclostomes do not possess jaws and paired fins
- C. All reptiles have a three chambered heart
- D. All pisces have gills covered by an operculum
Explanation
All cyclostomes lack true jaws and paired fins. Cyclostomes are jawless fish characterized by their round, sucker-like mouths for feeding and a single median fin for propulsion. Ornithorhynchus and Tachyglossus are oviparous mammals. Crocodile is a reptile which possesses four chambered heart. In cartilaginous fish (except Chimaera) gills are not covered by an operculum.
Last updated
Related questions
1. Fertilization_. 2. Digestive system_.3. Excretion by_.Fill in the blanks for the organism given in the below figure:
80% of the food of sponges consists of which of the following?
80% of the food of sponges consists of which of the following?
A blue colored respiratory pigment called hemocynanin is found in:
A body cavity completely surrounded by tissue derived from the mesoderm that provides cushioning for internal organs is called