Biology: Life and Systems
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Cell Theory and Organelles
SubtopicCell Theory and Organelles under Biology: Life and Systems for Grade 8 IB.
Preview questions (no answers)
- 1.
What is the function of a vesicle in a cell?
A.To produce sugar
B.To transport materials around the cell
C.To hold the DNA
D.To provide structural support
- 2.
Which of the following is true regarding the size of cells?
A.All cells are large enough to see with the naked eye
B.Most cells are microscopic
C.Animal cells are always larger than plant cells
D.Prokaryotic cells are larger than eukaryotic cells
- 3.
Which part of the microscope is the lens you look through at the top?
A.Objective lens
B.Ocular lens
C.Condenser
D.Base
Download the worksheet for Biology: Life and Systems - Cell Theory and Organelles to practice offline. It includes additional chapter-level practice questions.
Human Body Systems (Digestive, Respiratory, Circulatory)
SubtopicHuman Body Systems (Digestive, Respiratory, Circulatory) under Biology: Life and Systems for Grade 8 IB.
Preview questions (no answers)
- 1.
What is the name of the two large tubes that branch off the trachea into each lung?
A.Capillaries
B.Bronchi
C.Esophagus
D.Arteries
- 2.
How does oxygen move from the lungs into the bloodstream?
A.By active transport
B.By diffusion
C.By peristalsis
D.By pumping
- 3.
Which blood vessel carries oxygenated blood from the lungs back to the heart?
A.Pulmonary Artery
B.Vena Cava
C.Aorta
D.Pulmonary Vein
Download the worksheet for Biology: Life and Systems - Human Body Systems (Digestive, Respiratory, Circulatory) to practice offline. It includes additional chapter-level practice questions.
Genetics and DNA Structure
SubtopicGenetics and DNA Structure under Biology: Life and Systems for Grade 8 IB.
Preview questions (no answers)
- 1.
What is the term for a different version or form of a specific gene?
A.Allele
B.Nucleotide
C.Chromosome
D.Mutation
- 2.
What happens to the amount of DNA in a cell before it divides?
A.It is halved
B.It stays the same
C.It doubles
D.It disappears
- 3.
Which of these traits is most likely to be determined by your DNA?
A.Favorite food
B.Natural hair color
C.Ability to speak French
D.Knowledge of science
Download the worksheet for Biology: Life and Systems - Genetics and DNA Structure to practice offline. It includes additional chapter-level practice questions.
Ecology and Interactions in Ecosystems
SubtopicEcology and Interactions in Ecosystems under Biology: Life and Systems for Grade 8 IB.
Preview questions (no answers)
- 1.
What happens to the waste and remains of organisms in an ecosystem?
A.They disappear completely
B.They are broken down by decomposers
C.They turn into energy for producers
D.They are only eaten by predators
- 2.
Which of the following is the most complex level of organization in ecology?
A.Organism
B.Population
C.Community
D.Ecosystem
- 3.
When two species both try to use the same limited resource, it is called:
A.Mutualism
B.Commensalism
C.Competition
D.Parasitism
Download the worksheet for Biology: Life and Systems - Ecology and Interactions in Ecosystems to practice offline. It includes additional chapter-level practice questions.
Photosynthesis and Cellular Respiration
SubtopicPhotosynthesis and Cellular Respiration under Biology: Life and Systems for Grade 8 IB.
Preview questions (no answers)
- 1.
Which of the following is the correct word equation for photosynthesis?
A.Glucose + Oxygen Water + Carbon dioxide
B.Carbon dioxide + Water Glucose + Oxygen
C.Glucose + Water Oxygen + Carbon dioxide
D.Carbon dioxide + Oxygen Glucose + Water
- 2.
What is the function of the air spaces in the spongy mesophyll layer of a leaf?
A.To store extra water
B.To allow gases to circulate and reach the cells
C.To make the leaf float on water
D.To protect the leaf from insects
- 3.
What type of energy is light energy converted into during the process of photosynthesis?
A.Kinetic energy
B.Chemical energy
C.Thermal energy
D.Sound energy
Download the worksheet for Biology: Life and Systems - Photosynthesis and Cellular Respiration to practice offline. It includes additional chapter-level practice questions.