Life Processes Science - Life Processes

The oxygen liberated during photosynthesis by green plants comes from:

Pancreatic juice contains enzymes which digest:

Coagulation of blood in a cut or wound is brought about by:

Which of the following carries substances upwards as well as downwards in a plant?

One of the following organisms can live without oxygen of air. This organism is:

Out of xylem and phloem, which one carries materials:

1. Upwards as well as downwards?
2. Only upwards?

Name the conducting tissue in plants which is made of:

1. Living cells.
2. Dead cells.

State the term used for the transport of food from leaves to other parts of plant.

Name the conducting tissue of plants which is made of sieve tubes alongwith companion cells.

What is meant by ‘heart beat’? What is the usual heart beat rate at rest?

What is meant by aquatic animals and terrestrial animals?

What job is done by the kidneys?

Name the five steps which occur in the process of nutrition in animals.

What are the functions of liver and pancreas in the human digestive system?

Explain how, it would benefit deep sea divers if humans also had gills.

What are herbivores, carnivores and omnivores? Give two examples of each.

Define breathing. State the differences between breathing and respiration.

What is lymph? State two major functions of lymph.

What is meant by ‘systolic pressure’ and ‘diastolic pressure’? What are their normal values?

Describe the circulatory system in a fish.

An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.

1. What is (i) organism A, (ii) food B and (iii) food H?
2. What are C and D?
3. Name (i) green coloured substance E, and (ii) organ F.
4. What is the process G?

During the respiration of an organism A, 1 molecule of glucose produces 2 ATP molecules whereas in the respiration of another organism B, 1 molecule of glucose produces 38 ATP molecules.

1. Which organism is undergoing aerobic respiration?
2. Which organism is undergoing anaerobic respiration?
3. Which type of organism, A or B, can convert glucose into alcohol?
4. Name one organism which behaves like A.
5. Name two organisms which behave like B.

Draw a neat labelled diagram of the human excretory system.

What are the methods used by plants to get rid of their waste products?

Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through the tissue B in roots and stem, and reach the leaves of a plant. In the leaves food is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plants is called F.

1. What are (i) A, (ii) B, (iii) C, (iv) D, (v) E, and (vi) F?
2. Which tissue is made up of living cells: B or E?
3. Which tissue, B or E, contains sieve tubes?
4. Which tissue, B or E, contains tracheids?

State whether the following statements are true or false:
Some organisms store wastes in body parts.

State whether the following statements are true or false:
Fish and earthworm exchange gases during respiration in the same way.

State whether the following statements are true or false:
Energy can be produced in cells without oxygen.

State whether the following statements are true or false:
The value of systolic pressure is always lower than that of diastolic pressure.

Fill in the following blanks with suitable words:
Gums and resins are the _________ products of plants.

Fill in the following blanks with suitable words:
Bowman’s capsule and tubule taken together make a _________.

Fill in the following blanks with suitable words:
Iodine turns blue-black on reacting with _________.

Fill in the following blanks with suitable words:
Green plants use __________, _________ and __________ to make food.

Fill in the following blanks with suitable words:
All non-green plants and animals are __________.