1) Satwik travelled from Vijayawada to Tirupathi throughout night. He noticed that his two legs were swollen . what was it due to?

2)Write a chemical equation to represent Photosynthesis.

3) What is considered as energy currency .( write the extended form)

4) What is the mechanism behind root hairs absorbing soil water?

5) Cereals such as wheat,maize ,rice seem to taste sweet ,after chewing for some time in our mouth.Why?

6) Mention any two plant structures through which gaseous exchange takes place?

7 ) Mention any four differences between Combustion andRespiration.

8) The diagram below shows a model of the respiratory system.

(a) The table below shows the parts of the model and the parts of the respiratory system they represent. Fill in the missing information.

(b) Write down one difference between the blood entering the lungs and the blood leaving the lungs.

9) The graph shows the amount of oxygen given off and taken in by a tree over a period of 24 hours.

(a) When was the rate of photosynthesis the highest?

(b) Explain your answer in (a).

10) Arrange the following functions of digestive system in proper order.

( Absorption, Digestion, Defecation,Ingestion.)

1. 2. 3.

4.

11) Study the given diagram of two potted plants X and Y covered completely with polythene sheets placed in the sun.

a) What is the aim of this experimental set up?

b) What do you observe inside the cover of plotted plant ‘ X ‘

c) Is the case the same with the potted plant ’ Y ‘ also? Why?

d) Is the rate of this phenomena the same during day and night?

Parts of the model Parts of the respiratory system

glass tube

lungs

rubber sheet diaphragm

12) The diagram below shows an experiment that investigated photosynthesis.

(a) What are the colours of regions P and R after the leaf had been tested for starch?

P: _______

R: _______

(b) Give a reason for your answer in (a)

13) Read the following carefully.

A: The lungs expand. B: The air goes into the lungs. C: Air goes through the nose. D: The air goes into the windpipe.

E: Hairs in the nose trap dust and dirt present in the air.

Arrange them in the correct order to describe what happens during physical breathing. The first one has been done for you.

14) Here is the diagram of cross section of two types of blood vessels.. How are they different from each other with respect to the following?

( Thickness of walls, pressure in the vessels, size of lumen, rigidity.)

15) The boy shown in this digram appears undernourished due to malnutrition.

a) What is meant by malnutrition?

b) what type of malnutrition,the boy is suffering from?

c) Mention any three symptoms of this disease.

d) Suggest a remedy for this.

16) Observe the diagram shown here and the questions given.

A) which system contains these parts shown in the diagram ?

B) Mention the names of the parts indicated by A & B

C) What are the two systems with which A & B are connected ?

D) What is the process that is being carried out here and what will be the result ?

17) When you eat, the food will go down a tube as shown in the diagram

(a) Name the organ shown here

(b) This type of movement is called -------------

(c) Where will this food go next?

d) What is the digestive juice secreted by this part ?

18. Raja wants to make a table to compare photosynthesis and respiration. Help him complete the table below correctly

19) Aphids have a specialized mouthpart, called proboscis, which they use to pierce into the food-carrying tubes in a plant stem as shown in the diagram below.

a) What is the food that the aphids are obtaining from the food-carrying tube

(b) Aphids are found to feed off plants more often during the day than at night. Give a possible reason for this.

c) Aphids feed on tree sap just like female mosquitoes feed on human blood. What is that part in the human body which is similar to the food-carrying tube in the plant.

20)The diagram below shows how three different human systems interact and work together to carry out life processes

Answer the following questions based on the diagram above.

(a) X and Y are organs found in the systems as shown above while Z is a system. Identify what are X, Y and Z.

X : _________ Y : _______ Z : ____________

(b) The different arrows in the diagram represent different substances carried to/from all parts of the body. Identify the different substances

21) Mention any four vitamins ,related deficiency diseases and their resources.

22) A block digram of human circulatory system is shown here.Answer the following questions

a) What type of circulatory system is this?

b) What are A,B,C,D. and G,H,J

c) What are 1,2? What blood vessel missed labeling?

d) Show the sequential order of flow of deoxygenated blood.Start with ‘ F’

23) You are supplied with the following apparatus. Arrange the apparatus in proper order to demonstrate a phenomena related to autotrophs.Draw a neat labelled diagram.Mention the aim of setting this apparatus.

PHOTOSYNTHESIS RESPIRATION1) What are required? a) -------------

b) Chlorophyllc)------------d) Water

a) Sugar b) ----------

2) Products a) ----------b) Water

c) -----------

a) Waterb) CO2

c) ------------

3) When does it occur? -------------- --------------

24) Draw a neat labelled diagram of ‘Power house of a cell ‘ . What is produced in these power houses.

Part B

1) Which of the following represents the shortest path taken by the blood travelling from a leg to an arm in a human body?

A)leg --> heart --> lungs --> heart --> arm B)leg --> heart --> lungs --> arm --> heart

C)leg --> lungs --> heart --> arm --> heart D)leg --> lungs --> heart --> lungs --> arm

2) In Photosynthetic process, atmospheric carbon di oxide is _______ to carbohydrates

A) oxidized B) Reduced C) Neutralised D) Burnt

3)The enzyme Pepsin is inactive in stomach without the presence of

A) Nitric Acid B) Hydrochloric acid C) Acetic acid D) Butyri6)c acid

4) Rajib was absent in the class because of muscle pain which he claims to be due to excess physical exercise he had done yesterday. This pain is due to formation of

A) lactic acid B) acetic acid C) Pyruvic acid D) Hydrochloric acid

5) Right part of the human heart contains

A) Oxygenated blood B) Mixed blood C) Deoxygenated blood D) No blood

6) During cellular respiration one molecule of glucose is first broken down into two molecules of ________

A) Acetic acid B) Pyruvic acid C) Lactic acid D) oxalic acid

7) What is the role of platelets?

A)Oxygen transport B)Carbon dioxide transport C)Clotting of blood D)Immunity

8) Which life process converts chemical energy into heat energy?

A)Nutrition B)Respiration C)Excretion D)Transpiration

9) During the experiment on photosynthesis, leaf is boiled in which of these liquids?

A)Water B)Alcohol C)Iodine D)Sulphuric acid

10) :What is the role of bile during digestion?

A)Emulsification of fat B)Digestion of fat C)Absorption of fat D)Assimilation of fat

Fill in the blanks

11) The xylem in plants are responsible for transport of--------------------

12) Bile is produced in -------------------------

13) Region where absorption of food takes place is------------------------

14)The structures that control the flow of blood in the heart are -----------------------------

15) The roots used for respiration are called ----------------------------------------------

16) ------------------------- are sites for photosynthesis.

17) ------------------------------------ vitamin is synthesized by bacteria present in intestine.

18) Photolysis is also called ------------------------------------ reaction.

19) Expand RUBP ----------------------------------------

20) ----------------------------- is an example for catabolic process.

Match the following