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Earn 100

How many types of seeds can you collect? Where will you find them? Each of you should try to collect as many different types of seeds as you can. After that, put all the seed collections together. Now observe these seeds carefully—their shapes, sizes, colours, textures (smooth or rough). Make a seed chart to put up in the class. You can start with a table like this.

Name of the seed Colour Shape Texture
Rajma Reddish brown     Question Image Smooth

Important Questions on Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Write one function of parenchyma tissue.
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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Explain the structure of cartilage tissue.
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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Give an example of an entomophilous flower.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.

Observe the picture and answer the following question

Question Image

Name the part indicated as (i).

EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
What is excretion? Name two excretory organs in humans.
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
What is excretion? Explain
(i) excretion in Amoeba.
(ii) excretion in Earthworm.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.

Redraw the diagram. Name and label the parts indicated, below,

Question Image

Carries impulses away from the cell body

EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
T-lymphocytes originate from
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Name the structures that help in excretion in tapeworm, earthworm, cockroach and human beings.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
What is excretion? Name any two nitrogenous wastes products.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Parenchyma, collenchyma and sclerenchyma are kinds of simple permanent tissues in plants. Which of the following statement is true for collenchyma?
A. Made up of dead cells
B. Have very little intercellular space
C. Cells are irregularly thickened at the corners
D. Cell wall contains lignin
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Define excretion.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Sclerenchyma in plants is an example of simple permanent tissue that is comprised of two types of cells, sclereids and fibres. Why these cells are functionally important to the plants even after they die? Choose the correct alternative from the options given below.
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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Write two differences between axon and dendron.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.

Observe the given diagram and read the following statements.

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(i) These are cells of collenchyma tissue.

(ii) At maturity these cells lose their nucleus and cytoplasm.

(iii) The cells are living and thick at their corners.

(iv) This tissue gives flexibility to plant parts.

Correct statements are:

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Muscles contain special protein called 
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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Which of the following plant tip has quiescent centre
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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Explain the Haversian system of bone tissue.
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Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.

Give appropriate biological or technical terms for the following:

The relaxation phase of the heart.

EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells.>Structure and Function - In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Choose the incorrect statements among the following.
A) The female sex organs of Angiosperms are called strobilus.
B) The fusion of motile male gamete with non-motile egg is called zooidogamy.
C) Some algae are in association with animals.
D) Archegonium is flank shaped male sex organ with single cell.