Which of the following is not an example of convergent evolution?
Flippers of penguins and dolphins
Eyes of octopuses and mammals
Fore limbs of whales and bats
Wings of butterflies and birds
Male frogs can be distinguished from female frogs due to the presence of
A. Bulging eyes
B. Vocal sacs
C. Webbed digits in feet
D. Copulatory pad on first digit of fore limbs
E. Olive green-coloured skin with dark irregular spots
Choose the correct answer from the options given below
B and C only
$C$ and $E$ only
A and B only
B and D only
A group of researchers procured some fish like animals and upon investigation the following characters were observed:
A. Endoskeleton was made of cartilage.
B. Ectoparasitic; as they were found attached on fish skin with their circular sucking mouth.
C. Paired fins and scales were absent, but 7 pairs of gill slits were present.
Which of the following species of animals did they consider to fit best with these characters?
Scoliodon $s p$.
Petromyzon $s p$.
Exocoetus $s p$.
Branchiostoma sp.
$$ \text { Match List I with List II with respect to chronology of evolution of life forms } $$
| List-I |
List-II |
||
|---|---|---|---|
| A. | About 65 mya | I. | Jawless fish probably evolved |
| B. | About 500 mya | II. | The dinosaurs suddenly disappeared from the earth |
| C. | About 350 mya | III. | Seaweeds and few plants probably existed |
| D. | About 320 mya | IV. | Invertebrates were formed and became active |
$\mathrm{A}(\mathrm{III}), \mathrm{B}(\mathrm{IV}), \mathrm{C}(\mathrm{I}), \mathrm{D}(\mathrm{II})$
$\mathrm{A}(\mathrm{I}), \mathrm{B}(\mathrm{II}), \mathrm{C}(\mathrm{III}), \mathrm{D}(\mathrm{IV})$
$\mathrm{A}(\mathrm{II}), \mathrm{B}(\mathrm{IV}), \mathrm{C}(\mathrm{III}), \mathrm{D}(\mathrm{I})$
$\mathrm{A}(\mathrm{II}), \mathrm{B}(\mathrm{IV}), \mathrm{C}(\mathrm{I}), \mathrm{D}(\mathrm{III})$
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