SSLC (English Medium) इयत्ता १० - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

The homologous organs look similar and perform similar functions but they have different origin and developmental pattern.

Higher Order Thinking Skill (HOT) 

Arun was playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He thought it looked similar to a wing of a crow. Is he correct? Give reason for your answer.

Higher Order Thinking Skill (HOT)

Octopus, cockroach and frog all have eyes. Can we group these animals together to establish a common evolutionary origin. Justify your answer.

Raphano brassica is a man-made tetraploid produced by colchicine treatment.

Match the following

An inexhaustible resources is 

Common energy source in village is ______.

All files are stored in the ______.

The basis of modern periodic law is ______.

Powdered CaCO₃ reacts more rapidly than flaky CaCO₃ because of ______.

The xylem and phloem arranged side by side on the same radius is called ______

Phloem tissue is involved in the transport of water in plants.

In leech locomotion is performed by ______

In leech locomotion is performed by ______

The segments of leech are known as ______

The brain of leech lies above the ______

The body of the leech has ______

The posterior sucker is formed by the fusion of the ______ segments.

The anterior end of the leech has a lobe-like structure called ______.

The blood-sucking habit of a leech is known as ______.