What is the correct order of stages in incomplete metamorphosis in insects?

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

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

Which one among the following is the correct scheme followed for classification of animals?

Which one of the following is a filter feeder?

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.