Who was first to use the characteristics of vascular tissues in the classification of plants?

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

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…

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

Which one of the following belongs to ‘Pisces’?

Which one of the following is a filter feeder?