CBSE CLASS 9 - BIOLOGY - CELL: FUNDAMENTAL UNIT OF LIFE (Worksheet)(#cbsenotes)(#eduvictors)

CELL: FUNDAMENTAL UNIT OF LIFE 

(Worksheet)

Fill in the blanks with suitable words.

1. The fundamental organizational unit of life is the _______.


2. Cells are enclosed by a plasma membrane composed of ________ and _______.


3. Plasma membrane is a __________ permeable membrane.


4. In plant cells, a cell wall composed of _________ is located outside the cell membrane.


5. In prokaryotes, the nuclear membrane is ________.

CBSE Class 9 - Science - Why do we Fall ill? (MCQs)

Why do we Fall ill? 

(MCQs)

Q1: Which one of the following is an infectious disease?

(a) diptheria
(b) diabetes
(c) hypertension
(d) cancer


Q2: Elephantiasis disease can have

(a) short-term affect on our health
(b) no effect on our health
(c) long term affect on our health
(d) sometimes bad effect on our health

CBSE Class 9 - Biology - CH6 - Tissues (Set-1)

PLANT TISSUES 

MCQs, NCERT Chapter Solutions and Q & A (asked in CBSE examination)

MCQs

Q1: The study of tissues is called ...
a) cytology
b) embryology
c) histology
d) pathology

Answer: c) histology


Q:2 Which of the following statement is NOT true?
(a) Most of the plant tissues are the supportive type.
(b) Tissues ensure the division of labour.
(c) Sedentary existence contributes to the organ system design in animals.
(d) Organ systems are far more complex in animals than in plants.

Class 9 - Chapter 5 - Cell - Fundamental Unit of Life - NCERT Q & A #class9-biology #eduvictors

Fundamental Unit of Life 

NCERT Q & A

Q1: Who observed the cells the first time?
Answer: Robert Hooke. He observed a thin slice of cork cells under a simple microscope.

 

Simple Microscope made by Robert Hooke (credits: Wikipedia)

Q2: Define Cell

Answer: The cell is the structural and functional unit of life.

Q3: Who proposed the cell theory?

Answer: Schleiden (1838) and Schwann (1839).

Q4: Who expanded cell theory by suggesting that all cells arise from pre-existing cells?

Answer: Virchow (1855.

Q5: In which year the electron microscope was invented?

Answer: 1940

Q6: Name the book in which Robert Hooke published his observations about cork cells.

Answer: Micrographia.