Which of the following unit of measurement is used for expressing the dimension (the size) of the cells?
(a) Centimetre
(b) Millimetre
(c) Micrometre
(d) Metre

Academic Biology NCERT Class 8

Correct Answer: (c) Micrometre

Explanation: The dimensions (the size) of the cells are measured in a micrometer.

1 micron or micrometer = 10^-6 meter

Tutorialspoint

Simply Easy Learning

Updated on: 12-Jan-2023

6 Views

Which one of the following is not the unit of energy?$(a)$. joule$(b)$. newton metre$(c)$. kilowatt$(d)$. kilowatt hour
Name the unit which is commonly used for expressing the energy released in nuclear reactions.
The distance between Delhi and Mumbai is usually expressed in units of$(a)$. decametre$(b)$. metre$(c)$. centimetre$(d)$. kilometre
Which of the following cannot be used for measurement of time?$(a)$. A leaking tap$(b)$. Simple pendulum$(c)$. Shadow of an object during the day$(d)$. Blinking of eyes
Which of the following cells is shaped like a star with a tail?(a) Neuron(b) Muscle cells(c) Cells of skin(d) RBC
Which of the following cells is of irregular shape?(a) RBC(b) WBC(c) Muscle cell(d) Neuron
Which of the following plastics is used for making electric switches?A. Teflon B. melamine C. PET D. Bakelite
In plants which of the following is used for absorption of water?(a) Xylem (b) Phloem(c) Stomata(d) Root hair
Which of the following is known as the energy currency of cells in biology?(a) DTP (b) PDP (c) ATP (d) DDT
Give reasons for the following:(a) The cell is called the structural and functional unit of life.(b) Plant cells are more rigid than the animal cells.
Name the commercial unit of measurement of energy.
In the absence of which of the following will photosynthesis not occur in leaves?(a) Guard cells(b) Chlorophyll(c) Vacuole(d) Space between cells
Iodine is necessary for the synthesis of which of the following hormone?(a) adrenaline (b) auxin (c) thyroxine (d) insulin
Which one of the following types of medicines are used for treating indigestion?(a) Antibiotic(b) Analgesic(c) Antacid(d) Antiseptic
Choose the correct option in each of the following:-1. Which of the following is a liquid at ordinary temperature?A. Carbon B. Phosphorus C. Oxygen D. Bromine2. Which of the following is/are solid nonmetals?A. Carbon B. Sulpher C. Phosphorus D. All of these3. Which of the followings is the best conductor of electricity?A. Silver B. Copper C. Aluminium D. Iron4. Which of the following will displace copper from a solution of copper (II) sulphate?A. Magnesium B. Aluminium C. Iron D. All of these5. Which of the followings gases is used in advertisement signs?A. Hydrogen B. Oxygen C. Nitrogen D. Neon

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements