Which of the following characteristic features always holds true for the corresponding group of animals?
Correct answer: C. Cartilaginous endoskeleton - Chondrichthyes
- A. Possess a mouth with an upper and a lower jaw - Chordata
- B. 3-chambered heart with one incompletely divided ventricle - Reptilia
- C. Cartilaginous endoskeleton - Chondrichthyes
- D. Viviparous - Mammalia
Explanation
Chondrichthyes, a class of fish that includes sharks, rays, and chimaeras, have a cartilaginous endoskeleton. This means their internal skeletal structure is made of cartilage rather than bone, providing flexibility and reduced weight for life in the water. Phylum Chordata includes both jawless vertebrates (Agnatha) and jawed vertebrates (Gnathostomata). Reptilia have a four chambered heart with two auricles and two ventricles. Duck billed platypus and spiny anteater are oviparous mammals.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
Practise Biodiversity and Variety of Life
3,130 free Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kingdom Animalia questions
Which one of the following characteristics is not shared by birds and mammals?
In case of poriferans, the spongocoel is lined with flagellated cells called:
Which among these is the correct combination of aquatic mammals?
Which of the following features is not present in the Phylum Arthropoda?
Body having a meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of which Phylum?
A jawless fish lays eggs in fresh water and it has ammocoetes larvae after metamorphosis. This fish return to the ocean as _