Consider the following statements about mosquitoes: 1. Only males suck blood. 2. Only females suck blood. 3. Females suck plant sap. 4. Wings of females are larger than those of males. 5. Wings of males are larger than those of females.

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

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

Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?

Which one of the following creatures has no blood but respires?