Plant Identification Trivia Questions and Answers

a close up of a plant with yellow flowers

1: Which branch of science is primarily concerned with finding, identifying, describing, classifying, and naming plants?
A: Botany
B: Zoology
C: Taxonomy
D: Entomology
Correct Answer: C
Explanation: Plant taxonomy is the science of finding, identifying, describing, classifying, and naming plants.

2: Which process allows plants to convert energy from light into organic energy?
A: Cellular Respiration
B: Photosynthesis
C: Fermentation
D: Mitosis
Correct Answer: B
Explanation: Photosynthesis is the process by which plants convert light energy into organic energy.

3: What is the basic unit of classification in plant taxonomy?
A: Order
B: Family
C: Genus
D: Species
Correct Answer: D
Explanation: The species is the basic unit of classification and refers to a group of organisms capable of interbreeding and producing fertile offspring.

4: Angiosperms are also known as what type of plants?
A: Non-flowering plants
B: Conifers
C: Flowering plants
D: Mosses
Correct Answer: C
Explanation: Angiosperms are flowering plants with seeds enclosed within an ovary (often a fruit).

5: Who coined the term “Angiospermae” in 1690?
A: Carl Linnaeus
B: Paul Hermann
C: Robert Brown
D: Joseph Hooker
Correct Answer: B
Explanation: Paul Hermann coined the term Angiospermae in 1690 to refer to flowering plants with seeds enclosed in capsules.

6: In taxonomy, what is the primary difference between gymnosperms and angiosperms as clarified by Robert Brown?
A: Gymnosperms have naked ovules, while angiosperms have enclosed ovules.
B: Gymnosperms have seeds in cones, while angiosperms do not.
C: Gymnosperms are non-flowering plants, while angiosperms are flowering plants.
D: Gymnosperms do not have seeds, while angiosperms do.
Correct Answer: A
Explanation: Robert Brown clarified that gymnosperms have naked ovules, while angiosperms have enclosed ovules.

7: What discovery did Hofmeister make in 1851 that influenced plant taxonomy?
A: Existence of true flowers
B: Changes in embryo-sac of flowering plants
C: Classification of algae
D: Role of chlorophyll in photosynthesis
Correct Answer: B
Explanation: Hofmeister discovered the changes in the embryo-sac of flowering plants, elucidating their relationships to Cryptogamia.

8: Which system treats flowering plants as a subclass called Magnoliidae?
A: Cronquist system
B: APG system
C: Reveal system
D: Engler system
Correct Answer: B
Explanation: The APG system treats flowering plants as a subclass called Magnoliidae.

9: What does “monophyletic” mean as used in modern plant taxonomy?
A: Only present in ferns
B: Having a single cotyledon
C: Originating from a common ancestor
D: Divided into multiple groups
Correct Answer: C
Explanation: “Monophyletic” refers to a group of organisms that originate from a common ancestor.

10: The plant kingdom is divided into several groups. Which of these groups has members that typically produce seeds in cones?
A: Bryophyta
B: Equisetophyta
C: Coniferophyta
D: Pteridophyta
Correct Answer: C
Explanation: Coniferophyta includes conifers, which reproduce by producing seeds often in cones.

11: Which division belongs to the plant kingdom and includes liverworts?
A: Bryophyta
B: Anthocerotophyta
C: Hepatophyta
D: Pteridophyta
Correct Answer: C
Explanation: Hepatophyta is the division that includes liverworts.

12: The only member of the division Ginkgophyta is:
A: Pine tree
B: Ginkgo biloba
C: Rose
D: Cactus
Correct Answer: B
Explanation: The only member of the division Ginkgophyta is the ginkgo biloba.

13: What does the International Code of Nomenclature (ICN) govern?
A: Genetic engineering procedures
B: Formal botanical nomenclature
C: Photosynthesis processes
D: Soil testing methods
Correct Answer: B
Explanation: The ICN governs the set of rules and recommendations for formal botanical nomenclature, including plants.

14: Which classification category is broader than “genus” but narrower than “order” in plant taxonomy?
A: Species
B: Family
C: Class
D: Division
Correct Answer: B
Explanation: A family is broader than genus but narrower than order in the hierarchy of plant classification.

15: What characteristic is commonly used to distinguish plants from animals?
A: Mobility
B: Ability to produce flowers
C: Having cell walls made of cellulose
D: Thriving in the desert
Correct Answer: C
Explanation: Plants have cell walls made of cellulose, which is one of the key traits distinguishing them from animals.

16: Which two major classes do flowering plants get divided into traditionally?
A: Bryophytes and Ferns
B: Dicots and Monocots
C: Hepatophytes and Anthophytes
D: Algae and Fungi
Correct Answer: B
Explanation: Flowering plants are traditionally divided into dicotyledons (dicots) and monocotyledons (monocots).

17: In systematic botany, what term is used to describe the study of the evolutionary relationships between plants?
A: Phylogeny
B: Genetics
C: Morpheology
D: Cytology
Correct Answer: A
Explanation: Phylogeny refers to the study of the evolutionary relationships between plants.

18: Which popular system of flowering plant classification was proposed by Arthur Cronquist?
A: Takhtajan system
B: Engler system
C: Cronquist system
D: Dahlgren system
Correct Answer: C
Explanation: The Cronquist system, proposed by Arthur Cronquist, is a well-known classification system for flowering plants.

19: What are the major groups within the plant kingdom based on general vegetative structures and reproductive methods?
A: Algae and Fungi
B: Ferns and Mosses
C: Bryophyta, Hepatophyta, Anthocerotophyta
D: Gymnosperms and Angiosperms
Correct Answer: C
Explanation: Bryophyta (mosses), Hepatophyta (liverworts), and Anthocerotophyta (hornworts) form major groups based on vegetative structures and reproduction through spores.

20: The term “Angiospermae” is derived from which two Greek words?
A: Angeíon and Spérma
B: Anthos and Sperma
C: Botanē and Phyton
D: Fotia and Phos
Correct Answer: A
Explanation: The term Angiospermae comes from Greek words angeíon (meaning bottle or vessel) and spérma (meaning seed).

21: What system treats flowering plants as a subdivision called Magnoliophytina?
A: Reveal system
B: Cronquist system
C: Thorne system
D: Wettstein system
Correct Answer: A
Explanation: The Reveal system treats flowering plants as a subdivision called Magnoliophytina.

22: According to the APG system, which subset includes the majority of dicot species?
A: Monocots
B: Basal Angiosperms
C: Eudicots
D: Gymnosperms
Correct Answer: C
Explanation: According to the APG system, the majority of dicot species fall into the clade known as Eudicots.

23: What kingdom classification does the family Liliaceae belong to?
A: Fungi
B: Plantae
C: Protista
D: Animalia
Correct Answer: B
Explanation: The family Liliaceae belongs to the kingdom Plantae.

24: Which of the following is a characteristic unique to mosses within the plant kingdom?
A: Vascular tissues
B: Seeds
C: Spores
D: Cones
Correct Answer: C
Explanation: Mosses produce spores for reproduction rather than seeds or cones and lack vascular tissues.

25: Which system published the influential classification of angiosperms in 1998?
A: Dahlgren system
B: APG system
C: Engler system
D: Reveal system
Correct Answer: B
Explanation: The Angiosperm Phylogeny Group (APG) system published an influential classification of angiosperms in 1998.

26: In 1827, Robert Brown discovered that certain seed plants have:
A: Flowers
B: True grasses
C: Cones
D: Truly-naked ovules
Correct Answer: D
Explanation: Robert Brown discovered the presence of truly naked ovules in some seed plants, which differentiated gymnosperms from angiosperms.

27: Which descriptive names correctly describe seed plants?
A: Monocotyledons and Dicotyledons
B: Mosses and Liverworts
C: Algae and Fungi
D: Bryophytes and Pteridophytes
Correct Answer: A
Explanation: Seed plants are often described as monocotyledons (monocots) and dicotyledons (dicots) based on their seed leaves.

28: Which grouping includes species that have distinctive structures for vegetative reproduction requiring damp conditions?
A: Ferns
B: Gymnosperms
C: Bryophyta
D: Angiosperms
Correct Answer: C
Explanation: Bryophyta, including mosses, have distinctive vegetative structures and require damp conditions for reproduction via spores.

29: What goal of plant taxonomy involves determining the name and properties of a newly discovered plant?
A: Identification
B: Description
C: Classification
D: Cultivation
Correct Answer: A
Explanation: Plant identification involves determining the name and properties of a newly discovered plant.

30: Which plant division does the sole surviving species Ginkgo biloba belong to?
A: Bryophyta
B: Hepatophyta
C: Ginkgophyta
D: Pteridophyta
Correct Answer: C
Explanation: Ginkgo biloba is the sole surviving member of the division Ginkgophyta.

31: The term “dicotyledons” (‘dicots’) refers to seeds that typically have:
A: Three cotyledons
B: No cotyledons
C: One cotyledon
D: Two cotyledons
Correct Answer: D
Explanation: Dicotyledons (dicots) typically have two cotyledons or embryonic leaves within each seed.

32: Which formal system of plant taxonomy includes “Magnoliopsida” and “Liliopsida”?
A: APG system
B: Thorne system
C: Cronquist system
D: Reveal system
Correct Answer: C
Explanation: The Cronquist system classifies flowering plants into “Magnoliopsida” and “Liliopsida” classes.

33: The APG system treats flowering plants as an unranked clade without a formal Latin name. What common term is used for this group?
A: Gymnosperms
B: Bryophytes
C: Angiosperms
D: Pteridophytes
Correct Answer: C
Explanation: The APG system treats flowering plants as an unranked clade commonly referred to as angiosperms.

34: In systematic botany, which class includes plants that have only one cotyledon?
A: Bryophytes
B: Dicots
C: Monocots
D: Gymnosperms
Correct Answer: C
Explanation: Monocotyledons (monocots) include plants that typically have only one cotyledon or embryonic leaf within each seed.

35: What is a formal description of a newly discovered species of plant, usually following ICN guidelines, called?
A: Plant Identification
B: Plant Classification
C: Plant Description
D: Plant Cultivation
Correct Answer: C
Explanation: Plant description is a formal description of a newly discovered species of plant, adhering to ICN guidelines.

36: Which plant group lacks a vascular system and has vegetative structures?
A: Gymnosperms
B: Ferns
C: Bryophytes
D: Conifers
Correct Answer: C
Explanation: Bryophytes lack a vascular system and have distinctive vegetative structures used for reproduction.

37: What identifying feature usually distinguishes members of monocotyledons (monocots)?
A: Flowers
B: Two cotyledons
C: One cotyledon
D: Spores
Correct Answer: C
Explanation: Monocotyledons (monocots) are identified by having one cotyledon or seed leaf.

38: What discovery determined the correct relationships of Gymnosperms to Cryptogamia in 1851?
A: Chlorophyll function
B: Photosynthesis process
C: Embryo-sac changes
D: Conifer growth
Correct Answer: C
Explanation: The discovery of changes in the embryo-sac by Hofmeister determined the correct relationships of Gymnosperms to Cryptogamia in 1851.

39: Who is associated with the reclassification work of angiosperms beginning in 1998?
A: Arthur Cronquist
B: Carl Linnaeus
C: Angiosperm Phylogeny Group (APG)
D: Paul Hermann
Correct Answer: C
Explanation: The Angiosperm Phylogeny Group (APG) is associated with the reclassification of angiosperms beginning in 1998.

40: According to modern research, dicot plants are mostly found in which clade?
A: Monocots
B: Eudicots
C: Gymnosperms
D: Conifers
Correct Answer: B
Explanation: Most dicot plants are found in the clade Eudicots according to modern research.

41: What is the primary aim of plant classification in taxonomy?
A: To categorize plants by smell
B: To organize plants by climate
C: To group known plants to show relationships
D: To document plant longevity
Correct Answer: C
Explanation: The primary aim of plant classification is to group known plants into categories that show their relationships.

42: What type of reproductive structures do ferns produce?
A: Seeds
B: Cones
C: Spores
D: None
Correct Answer: C
Explanation: Ferns reproduce by producing spores instead of seeds.

43: What botanical class does the family Liliaceae fall into according to traditional taxonomy?
A: Magnoliopsida
B: Liliopsida
C: Pinales
D: Bryophyta
Correct Answer: B
Explanation: According to traditional taxonomy, the family Liliaceae falls into the class Liliopsida.

44: How do plants obtain organic energy unlike animals?
A: Feeding on bacteria
B: Consumption of organic molecules
C: Photosynthesis
D: Absorbing heat
Correct Answer: C
Explanation: Plants obtain organic energy through photosynthesis, unlike animals that consume organic molecules.

45: The International Plant Names Index (IPNI) is associated with what process in plant taxonomy?
A: Genetic modification of plants
B: Fossil analysis
C: Registration of plant names
D: Growing plants in greenhouses
Correct Answer: C
Explanation: The International Plant Names Index (IPNI) registers the names of validly published plant species.

46: What discovery about the growth of flowering plants was made in 1851?
A: Role of chlorophyll in plants
B: Evolution of plant roots
C: Relationship between flowering plants and Cryptogamia
D: Structure of plant stems
Correct Answer: C
Explanation: In 1851, the relationship between flowering plants and Cryptogamia was correctly identified by Hofmeister.

47: The classification of which group of plants includes Magnoliopsida and Liliopsida?
A: Bryophytes
B: Gymnosperms
C: Angiosperms
D: Fungi
Correct Answer: C
Explanation: The classification of angiosperms includes Magnoliopsida (dicots) and Liliopsida (monocots).

48: What trait do plants in the division Anthocerotophyta share with Bryophytes?
A: Vascular tissues
B: Tall stem growth
C: Producing seeds
D: Spores for reproduction
Correct Answer: D
Explanation: Plants in the division Anthocerotophyta, like Bryophytes, reproduce using spores.

49: What descriptive names are allowed for the classes of dicotyledons and monocotyledons in accordance with the ICBN?
A: Magnoliopsida and Liliopsida
B: Bryophytes and Fungi
C: Pinophytes and Ginkgophytes
D: Hepatophytes and Pteridophytes
Correct Answer: A
Explanation: Magnoliopsida (dicotyledons) and Liliopsida (monocotyledons) are the descriptive names allowed by Article 16 of the ICBN.

50: What characteristic of the dicots is supported by recent APG research?
A: They form a monophyletic group
B: They are best classified by leaf shape
C: They are primarily aquatic
D: They are paraphyletic
Correct Answer: D
Explanation: Recent APG research supports that dicots are paraphyletic, meaning they do not form a single, natural group.

51: What does “ICBN” stand for?
A: International Code of Botanical Naming
B: International Criteria for Biotype Naming
C: International Code of Botanical Nomenclature
D: Institute of Central Botanical Naming
Correct Answer: C
Explanation: ICBN stands for the International Code of Botanical Nomenclature.

52: What is an example of a plant without a vascular system in the plant kingdom’s classification?
A: Aloe Vera
B: Hornwort
C: Fern
D: Pine
Correct Answer: B
Explanation: Hornwort, a member of Anthocerotophyta, lacks a vascular system unlike ferns or pines.

53: Which group of plants reproduce by producing seeds in cones?
A: Ferns
B: Bryophytes
C: Angiosperms
D: Conifers
Correct Answer: D
Explanation: Conifers reproduce by producing seeds often contained within cones.

54: What describes the process of the scientific classification of plants?
A: Documenting plant lifespan
B: Studying plant fossils
C: Categorizing plants into hierarchical groups
D: Analyzing plant DNA
Correct Answer: C
Explanation: Scientific classification involves categorizing plants into hierarchical groups based on their relationships.

55: Flowering plants can also be referred to by which term?
A: Bryophyta
B: Conifers
C: Angiosperms
D: Ferns
Correct Answer: C
Explanation: Flowering plants are also known as angiosperms.

56: Which plant kingdom division includes species with distinctive vegetative structures?
A: Coniferophyta
B: Hepatophyta
C: Ginkgophyta
D: Pteridophyta
Correct Answer: B
Explanation: Hepatophyta includes liverworts, which like mosses have distinctive vegetative structures.

57: What is the primary purpose of classification systems in plant taxonomy?
A: To determine the smell of plants
B: To identify the color of plants
C: To group organisms by shared characteristics
D: To determine the height of plants
Correct Answer: C
Explanation: Classification systems group organisms by shared characteristics to better understand their relationships.

58: What is a key characteristic of Gymnosperms in comparison to Angiosperms?
A: Gymnosperms have colorful flowers
B: Gymnosperms have seeds protected by fruits
C: Gymnosperms have naked seeds
D: Gymnosperms need water for reproduction
Correct Answer: C
Explanation: Gymnosperms have naked seeds, unlike the encased seeds of angiosperms.

59: What term is used to describe the placing of known plants into groups or categories to show relationships?
A: Cultivation
B: Identification
C: Classification
D: Fossilization
Correct Answer: C
Explanation: Classification is the process of placing known plants into groups or categories to show relationships.

60: Which plant division is noted for including only the species Ginkgo biloba?
A: Pteridophyta
B: Bryophyta
C: Ginkgophyta
D: Hepatophyta
Correct Answer: C
Explanation: Ginkgophyta is noted for including only the species Ginkgo biloba.

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