Group the animals in the above list as vertebrates and invertebrates. Make a dichotomous key for the vertebrates.

Here are the solutions to your questions:

i) Group the animals in the above list as vertebrates and invertebrates

Vertebrates:

• Iguana
• Squirrel
• Fish (Snake head)
• Whale
• Crow
• Bat
• Bull

Invertebrates:

• Mosquito
• Crab
• Butterfly
• Bee
• Scorpion
• Millipede

ii) Make a dichotomous key for the above vertebrates

Here is a dichotomous key for the vertebrates:

1. Does the animal live primarily in water?

   • Yes → Go to step 2
   • No → Go to step 3

2. Does the animal have fins and gills?

   • Yes → This is a Fish (Snake head).
   • No (It is a mammal with flippers/tail) → This is a Whale.

3. Does the animal have feathers and wings?

   • Yes → This is a Crow.
   • No → Go to step 4

4. Does the animal have membranous wings and fur, allowing it to fly?

   • Yes → This is a Bat.
   • No → Go to step 5

5. Does the animal have scales and lay eggs?

   • Yes → This is an Iguana.
   • No → Go to step 6

6. Is the animal typically large, with hooves and horns?

   • Yes → This is a Bull.
   • No (It is a smaller, furry mammal) → This is a Squirrel.