Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food? 

Consider the following statements regarding the Indian squirrels :

1. They build nests by making burrows in the ground.

2. They store their food materials like nuts and seeds in the ground.

3. They are omnivorous.

How many of the above statements are correct?

Which one of the following makes a tool with a stick to scrape insects from a hole in a tree or a log of wood? 

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:

1. Biofilters provide waste treatment by removing uneaten fish feed.

2. Biofilters convert ammonia present in fish waste to nitrate.

3. Biofilters increase phosphorus as nutrient for fish in water.

How many of the statements given above are correct?