With reference to 'earthworms', which of the following statements is/are correct? 1. Earthworms improves soil fertility and are known as farmer's friends. 2. Earthworm has two pair of hearts.

Which of the following statements is/are correct? 1. Dolphins and Whales breathe through blowholes. 2. Earthworm breathe through their skin.

Which of the following is the correct order of plant species from higher to lower order ?

Rupa and Sachin observed an animal in their school garden. Rupa called it an insect while Sachin identified it as an earthworm. Which one of the following characteristics confirms that it is an insec…

Certain species of which one of the following organisms are well known as cultivators of fungi?

Which one of the following animals has a three-chambered heart?