Biology: Cells, Organization, and Classification
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Characteristics of Living Organisms and Spontaneous Generation
SubtopicCharacteristics of Living Organisms and Spontaneous Generation under Biology: Cells, Organization, and Classification for Grade 8 IB.
Preview questions (no answers)
- 1.
A Venus Flytrap closing its leaves on an insect is a clear example of:
A.Sensitivity
B.Respiration
C.Excretion
D.Growth
- 2.
What provides the 'blueprint' or instructions for reproduction in living cells?
A.Water
B.DNA
C.Glucose
D.Oxygen
- 3.
Which life process is most closely associated with the removal of from the human body?
A.Excretion
B.Nutrition
C.Growth
D.Reproduction
- 4.
Which of these gases is usually taken in for aerobic respiration?
A.Carbon dioxide
B.Oxygen
C.Nitrogen
D.Hydrogen
- 5.
Two organisms are in the same Class. Which other taxonomic groups must they also share?
A.Order and Family
B.Genus and Species
C.Kingdom and Phylum
D.They do not necessarily share any other groups
- 6.
What is the primary role of DNA in the characteristic of reproduction?
A.It provides energy for the process
B.It carries the genetic instructions from parents to offspring
C.It acts as a stimulus for movement
D.It is the main waste product of the process
- 7.
Which kingdom is characterized by organisms that are multicellular, have cell walls made of cellulose, and are autotrophic?
A.Fungi
B.Animalia
C.Plantae
D.Prokaryotae
- 8.
In classification, which of the following groups contains organisms that are most closely related?
A.Two organisms in the same Class.
B.Two organisms in the same Family.
C.Two organisms in the same Phylum.
D.Two organisms in the same Kingdom.
- 9.
Which of the following statements about 'Respiration' is FALSE?
A.It is the same thing as ventilation (breathing).
B.It occurs in every living cell.
C.It can occur without oxygen in some organisms.
D.It releases energy from nutrient molecules.
- 10.
Which process in MRS GREN refers to the ability of an organism to produce its own food using sunlight?
A.Respiration
B.Autotrophic Nutrition
C.Heterotrophic Nutrition
D.Homeostasis
Download the worksheet for Biology: Cells, Organization, and Classification - Characteristics of Living Organisms and Spontaneous Generation to practice offline. It includes additional chapter-level practice questions.
Prokaryotic and Eukaryotic Cells
SubtopicProkaryotic and Eukaryotic Cells under Biology: Cells, Organization, and Classification for Grade 8 IB.
Preview questions (no answers)
- 1.
The study of how living things are classified is called:
A.Biology
B.Taxonomy
C.Ecology
D.Genetics
- 2.
Which of these structures is found in eukaryotic cells but NEVER in prokaryotic cells?
A.DNA
B.Cell membrane
C.Mitochondria
D.Cytoplasm
- 3.
Which kingdom includes organisms like mushrooms and molds?
A.Plantae
B.Protista
C.Fungi
D.Animalia
- 4.
Which level of organization is represented by the digestive system?
A.Tissue
B.Organ
C.Organ system
D.Organism
- 5.
Which of the following is a characteristic of all life, shared by both prokaryotic and eukaryotic cells?
A.Ability to move using cilia
B.Requirement for oxygen
C.Ability to maintain homeostasis
D.Presence of a nervous system
- 6.
What is the primary role of the large central vacuole in a mature plant cell?
A.To perform aerobic respiration
B.To maintain turgor pressure and store nutrients
C.To synthesize proteins for export
D.To organize chromosomes during mitosis
- 7.
Which structure in a prokaryote controls the movement of substances into and out of the cell?
A.Cell wall
B.Capsule
C.Plasma membrane
D.Nucleoid
- 8.
A multicellular organism has cells with a nucleus, mitochondria, and no cell wall. It ingests other organisms for food. In which kingdom should it be classified?
A.Plantae
B.Fungi
C.Animalia
D.Protista
- 9.
Which of these processes occurs in the mitochondria of eukaryotes but in the plasma membrane of aerobic prokaryotes?
A.Glycolysis
B.Electron transport chain
C.Transcription
D.Translation
- 10.
In eukaryotic cells, where is the ribosomal RNA (rRNA) synthesized?
A.In the cytoplasm
B.In the Golgi apparatus
C.In the nucleolus
D.In the lysosomes
Download the worksheet for Biology: Cells, Organization, and Classification - Prokaryotic and Eukaryotic Cells to practice offline. It includes additional chapter-level practice questions.
Plant and Animal Cells
SubtopicPlant and Animal Cells under Biology: Cells, Organization, and Classification for Grade 8 IB.
Preview questions (no answers)
- 1.
Which level of organization is the most complex?
A.Organ
B.Cell
C.Organism
D.Tissue
- 2.
What is the scientific name for the 'skin' of the cell that is selectively permeable?
A.Cell wall
B.Cytoplasm
C.Cell membrane
D.Nuclear membrane
- 3.
Which kingdom do mushrooms and molds belong to?
A.Plantae
B.Protista
C.Fungi
D.Animalia
- 4.
What is the function of red blood cells?
A.To fight infection
B.To carry oxygen
C.To help blood clot
D.To produce hormones
- 5.
A scientist is using a classification key to identify different types of cells. According to the flowchart provided, which organism represents an animal cell?
A.Organism C
B.Organism B
C.Organism D
D.Organism A
- 6.
The diagram illustrates a cross-section of a plant leaf showing different tissue layers. Which layer is composed of specialized cells that are packed with the most chloroplasts to maximize photosynthesis?
A.Layer A
B.Layer C
C.Layer B
D.Layer D
- 7.
Which organelle is responsible for maintaining the shape of the animal cell and aiding in cell division?
A.Centrioles
B.Chloroplasts
C.Cell wall
D.Large vacuole
- 8.
Which of the following is the most significant advantage of being multicellular?
A.The organism can reproduce faster than unicellular organisms.
B.The organism requires less energy to survive.
C.Different cells can specialize to perform specific functions more efficiently.
D.The organism can survive without a cell membrane.
- 9.
In a plant cell, where is the genetic material primarily located?
A.In the nucleolus only
B.In the nucleus, mitochondria, and chloroplasts
C.In the cytoplasm and vacuole
D.In the nucleus only
- 10.
Which of the following organelles is surrounded by a double membrane?
A.Lysosome
B.Vacuole
C.Mitochondrion
D.Ribosome
Download the worksheet for Biology: Cells, Organization, and Classification - Plant and Animal Cells to practice offline. It includes additional chapter-level practice questions.
Specialized Cells and Levels of Biological Organization
SubtopicSpecialized Cells and Levels of Biological Organization under Biology: Cells, Organization, and Classification for Grade 8 IB.
Preview questions (no answers)
- 1.
Which level of organization contains all the other levels listed?
A.Organ
B.Tissue
C.Organism
D.Cell
- 2.
What is the primary function of the respiratory system?
A.To transport blood
B.To break down food
C.To exchange gases ( and )
D.To support the bones
- 3.
Which specialized cell is designed to be very long to carry messages across the body?
A.Red blood cell
B.Muscle cell
C.Neuron
D.Guard cell
- 4.
The stomach, small intestine, and large intestine are all parts of the same:
A.Tissue
B.Organ
C.Organ system
D.Cell type
- 5.
Which statement best describes the 'Organism' level of organization?
A.A collection of similar cells performing a task
B.The smallest unit of life
C.The sum of all organ systems working together to maintain life
D.A group of tissues that forms a functional unit
- 6.
What is the primary role of the mitochondria in a specialized cell like a sperm cell?
A.To synthesize proteins for the tail
B.To release energy from glucose during respiration
C.To store the cell's genetic information
D.To facilitate the diffusion of oxygen
- 7.
The endocrine system consists of various glands that secrete hormones. What level of organization does a single gland, like the thyroid, represent?
A.Organ
B.Tissue
C.Cell
D.Organ system
- 8.
Which of the following best explains why specialized cells in a multicellular organism have different structures and functions despite having the same DNA?
A.Each cell type only receives a small portion of the total DNA.
B.Environmental factors like temperature change the DNA sequence in different tissues.
C.Different sets of genes are 'turned on' (expressed) or 'turned off' in different cell types during development.
D.The cells mutate their DNA as they mature to better suit their function.
- 9.
A patient is diagnosed with a disease that specifically attacks the connective tissue. Which of the following would be most affected?
A.The transmission of signals between the brain and the muscles.
B.The lining of the lungs and digestive tract.
C.The structural support provided by cartilage, bone, and blood.
D.The voluntary movement of the limbs.
- 10.
In the context of classification, what is a 'taxon'?
A.A tool used to dissect organisms for study.
B.A specific rank or group in a biological classification system (e.g., Kingdom, Genus).
C.The process of naming a new species.
D.A genetic mutation that defines a new species.
Download the worksheet for Biology: Cells, Organization, and Classification - Specialized Cells and Levels of Biological Organization to practice offline. It includes additional chapter-level practice questions.
Diversity and Five-Kingdom Classification
SubtopicDiversity and Five-Kingdom Classification under Biology: Cells, Organization, and Classification for Grade 8 IB.
Preview questions (no answers)
- 1.
Which kingdom includes organisms like the and ?
A.Monera
B.Protista
C.Fungi
D.Plantae
- 2.
Which of the following describes a tissue?
A.A single cell performing all life functions
B.A group of different organs working together
C.A group of similar cells working together
D.An entire living thing
- 3.
Which classification level comes between Kingdom and Class?
A.Family
B.Order
C.Phylum
D.Genus
- 4.
What is the process by which a single cell divides into two identical daughter cells?
A.Photosynthesis
B.Respiration
C.Mitosis
D.Digestion
- 5.
Classification helps scientists primarily by:
A.Allowing them to name every individual animal on Earth
B.Providing a universal language and framework to study the diversity of life
C.Proving that all organisms eat the same food
D.Counting the exact number of organisms in a forest
- 6.
Which of the following best describes the body of a fungus?
A.A collection of stems and leaves
B.A network of tiny filaments called hyphae
C.A single large cell with many nuclei
D.A shell made of calcium carbonate
- 7.
What is the binomial name for humans?
A.B.C.D. - 8.
Why is the use of 'Latin' preferred for scientific names in the classification system?
A.It was the first language ever spoken
B.It is a 'dead' language, meaning it does not change over time, ensuring consistency
C.Only Latin names can describe the color of an organism
D.It is the easiest language for all scientists to learn
- 9.
Which of the following is a key feature used to classify Phylum Arthropoda within Kingdom Animalia?
A.Radial symmetry and soft bodies
B.Segmented bodies and jointed appendages
C.The presence of a backbone
D.Unsegmented bodies and a mantle
- 10.
An organism is found in a salt lake (extreme salinity). It produces methane and thrives in high temperatures. It is likely a(n):
A.Eubacterium
B.Archaebacterium
C.Protist
D.Fungus
Download the worksheet for Biology: Cells, Organization, and Classification - Diversity and Five-Kingdom Classification to practice offline. It includes additional chapter-level practice questions.