8th Grade Biology Quizzes , Questions & Answers

Recent Biology Quizzes

Cellular Respiration Glycolysis Krebs Cycle ETC

This assessment focuses on cellular respiration, covering glycolysis, the Krebs cycle, and the electron transport chain. It evaluates your understanding of key processes like ATP production, metabolic pathways, and fermentation....

Questions: 30 | Attempts: 10 | Last updated: Aug 31, 2026

Sample Question
Where does glycolysis occur in the cell?

Mitochondria

Nucleus

Cytoplasm

Inner mitochondrial membrane

Cellular Respiration and Energy Cycles

This assessment focuses on cellular respiration and energy cycles, evaluating knowledge of ATP production, aerobic respiration, and fermentation. Understanding these concepts is essential for grasping how organisms convert energy...

Questions: 8 | Attempts: 11 | Last updated: Aug 26, 2026

Sample Question
How many ATP molecules does 1 NADH produce?

1.5 ATP

2.5 ATP

3.5 ATP

4.0 ATP

Photosynthesis and Cellular Respiration

This assessment focuses on the processes of photosynthesis and cellular respiration, evaluating your understanding of light absorption, pigment roles, and the connections between these vital biological processes. It is useful for...

Questions: 30 | Attempts: 10 | Last updated: Aug 23, 2026

Sample Question
What is a photon?

A type of chlorophyll pigment

A tiny packet or unit of light energy

A molecule that carries electrons

A protein found in the thylakoid membrane

Plant Photosynthesis

This assessment explores the fundamental processes of photosynthesis, including the roles of light-dependent reactions, chlorophyll, and the Calvin cycle. It evaluates your understanding of key concepts such as photorespiration...

Questions: 8 | Attempts: 13 | Last updated: Aug 23, 2026

Sample Question
What is photosynthesis?

The process by which organisms break down glucose to release energy

The process by which photosynthetic organisms use light energy to convert CO₂ and water into carbohydrates

The process by which heterotrophs obtain food from other organisms

The process by which plants absorb minerals from the soil

Origin of Biodiversity and Evolution

This assessment focuses on the origin of biodiversity and evolution, evaluating understanding of key concepts like Transformism, Evolutionism, and phylogenetic relationships. It is relevant for learners seeking to grasp how...

Questions: 8 | Attempts: 12 | Last updated: Aug 12, 2026

Sample Question
Which of the following best distinguishes Transformism from Evolutionism?

Transformism states species change through mutations and natural selection, while Evolutionism relies on inherited acquired traits

Transformism proposes species change through inheritance of acquired traits, while Evolutionism proposes gradual change through mutations and natural selection

Transformism denies any change in species, while Evolutionism accepts gradual change

Transformism and Evolutionism are essentially the same theory with different names

Digestive Processes and the Digestive Tract

This resource explores the digestive processes and the digestive tract, focusing on key concepts like ingestion, mechanical and chemical digestion, and absorption. Understanding these processes is essential for grasping how the...

Questions: 8 | Attempts: 20 | Last updated: Aug 12, 2026

Sample Question
What is ingestion?

The physical breakdown of food into smaller fragments

The process of taking food and liquids into the body through the mouth

The movement of food along the digestive tract

The elimination of feces from the digestive tract

Digestive System: Stomach & Intestines

This assessment focuses on the digestive system, specifically the stomach and intestines. It evaluates your understanding of key functions such as the role of rugae, the pyloric sphincter, and nutrient absorption in the small...

Questions: 8 | Attempts: 11 | Last updated: Aug 12, 2026

Sample Question
What is the function of rugae in the stomach?

To produce hydrochloric acid

To allow the stomach to expand as it fills with food

To prevent acid reflux

To control the release of chyme into the small intestine

The 3 Domains of Life Classification

This assessment focuses on the three domains of life in biological classification, evaluating your understanding of prokaryotes, eukaryotes, and their characteristics. You'll explore key concepts such as cell structure, genetic...

Questions: 8 | Attempts: 11 | Last updated: Aug 10, 2026

Sample Question
What is a 'Domain' in biological classification?

The smallest and most specific level of classification

The highest and broadest level of biological classification

A group of organisms that can interbreed

A classification level below Kingdom

The 6 Kingdoms of Life Classification

This assessment focuses on the six kingdoms of life, evaluating your understanding of cell types, nutritional modes, and unique characteristics. It covers key concepts such as prokaryotic vs. eukaryotic cells, the role of fungi,...

Questions: 8 | Attempts: 11 | Last updated: Aug 10, 2026

Sample Question
What is the cell type of Eubacteria?

Eukaryotic

Prokaryotic

Multicellular

Unicellular only

The Process of Photosynthesis

This assessment focuses on the process of photosynthesis, evaluating key concepts such as the roles of chlorophyll, ATP, and the Calvin cycle. Understanding these elements is crucial for grasping how plants convert sunlight into...

Questions: 10 | Attempts: 10 | Last updated: Aug 10, 2026

Sample Question
What is photosynthesis?

The process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar

The process by which plants absorb nutrients from the soil to grow

The process by which plants release carbon dioxide and absorb oxygen

The process by which plants convert glucose into carbon dioxide

« Previous 123 4 5 6 7 8 9...29 Next »