EASY
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Liver act as an excretory organ. Justify the statement.

Important Questions on Excretion in Organisms

EASY

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

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Carries impulses away from the cell body

EASY
What is excretion? Name any two nitrogenous wastes products.
MEDIUM
Explain the structure of cartilage tissue.
MEDIUM
Write two differences between axon and dendron.
MEDIUM
Write one function of parenchyma tissue.
MEDIUM
Explain the Haversian system of bone tissue.
EASY
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.
MEDIUM

Give appropriate biological or technical terms for the following:

The relaxation phase of the heart.

EASY
What is excretion? Name two excretory organs in humans.
MEDIUM
What is excretion? Explain
(i) excretion in Amoeba.
(ii) excretion in Earthworm.
EASY

Correct the following statements by changing the underlined words:

The normal pale yellow colour of the urine is due to the presence of the pigment Melanin.

EASY

Observe the picture and answer the following question

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Name the part indicated as (i).

MEDIUM
Give an example of an entomophilous flower.
EASY
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

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:

EASY
Name the structures that help in excretion in tapeworm, earthworm, cockroach and human beings.
EASY
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.
EASY
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong: