P-1 Metallurgy — Science STD 10 — Question

Define hydrotropism. Give one example of hydrotropism. State whether this example is of positive hydrotropism or negative hydrotropism. Illustrate your answer with the help of labelled diagram.

There are five animals P, Q, R, S and T. The animal P always lives in water and has gills for breathing. The animal Q can stay in water as well as on land and can breathe both, through moist skin and lungs. The animal R lives in soil and breathes only through its skin. The animal S lives on land and breathes through spiracles and tracheae. And animal T lives in water and breathes through its cell membrane.

1. Which of the animals could be Amoeba?
2. Which of the animals could be frog?
3. Which animal could be fish?
4. Which animal could be grasshopper?
5. Which animal could be earthworm?

Draw a labelled diagram of:

1. A xylem vessel.
2. A sieve tube (or phloem).

P and Q are two types of plants having weak stems which cannot stand upright on their own. The plants P and Q have organs R and S respectively which can grow towards any support which they happen to touch and wind around that support. It is observed that organ R originates from the leaves of the plant whereas organ S originates directly from the stem of the plant.

1. What is (i) R, and (ii) S?
2. What is the name of growth movement exhibited by the organs R and S?
3. Name the stimulus involved in this case.
4. State whether the behaviour of organs R and S is a tropic movement or a nastic movement.
5. Name one plant like P and another plant like Q.

Which type/types of power generation involve maximum number of steps of energy conversion? In which power generation is the number minimum?

How do carbohydrates, fats and proteins get digested in human beings?

State one characteristic each of the chemical reaction which takes place when:

1. Dilute hydrochloric acid is added to sodium carbonate.
2. Lemon juice is added gradually to potassium permanganate solution.
3. Dilute sulphuric acid is added to barium chloride solution.
4. Quicklime is treated with water.
5. Wax is burned in the form of a candle.

Which different aspects of disaster management would you check for your school? Why?

Sketch and label the diagram to show ATP – the energy currency of the cell.

With the help of a labelled diagram, describe the working of a nuclear power plant.