The characteristic of prototherians that provides an evidence of evolution of mammals from reptiles is that they have I
Correct answer: D. the same opening for excretion and reproduction
- A. webbed toes
- B. thick fur on their bodies
- C. mammary glands to feed their new-borns
- D. the same opening for excretion and reproduction
Explanation
The characteristic of prototherians that provides evidence of mammalian evolution from reptiles is the presence of a cloaca. This is a single opening used for both excretion and reproduction, a feature they share with reptiles, suggesting an evolutionary link. In contrast, most other mammals have separate openings for these functions.Webbed toes and thick fur are not indicative of reptilian ancestry. Mammary glands, although fundamental to mammals, do not establish an evolutionary connection to reptiles, as they are a distinctive development of 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
The option that CORRECTLY identifies the class, type of coelom and organisation of germinal layers in leech is
The venous flower basket is also known as which of the following?
Which of the following characteristic belongs to acoelomates?
The given diagram represents a type of symmetry.Which of the following animal has this type of symmetry as shown in the diagram?
The CORRECT feature of ostium and and osculum in the body of sponges is
The example of an animal which has a complete digestive system is