KCET · BIOLOGY · STD 11 - 4. Animal Kingdom
In some chordates, the notochord is modified as the vertebral column. Such animals are called vertebrates. Which one of the following statements make sense?
- A All chordates are vertebrates but all vertebrates are not chordates.
- B All vertebrates are chordates and all chordates are vertebrates.
- C All vertebrates are chordates but all chordates are vertebrates.
- D Chordates are not vertebrates and vertebrates are not chordates.
Answer & Solution
Correct Answer
(D) Chordates are not vertebrates and vertebrates are not chordates.
Step-by-step Solution
Detailed explanation
(D) Chordates are not vertebrates and vertebrates are not chordates.,
The mammal with a true placenta is the mongoose. True placenta provide extended nourishment to the developing foetus. The kangaroo, Echidna and platypus do not have true placenta.
The mammal with a true placenta is the mongoose. True placenta provide extended nourishment to the developing foetus. The kangaroo, Echidna and platypus do not have true placenta.
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