Biology

Plant Biology and Classification

1,473 Questions

Plant Biology and Classification deals with the taxonomy, evolution, and morphological features of the plant kingdom. This collection offers practice questions on plant groups, taxonomic hierarchies, and specific plant characteristics. The questions are tailored for students preparing for biology competitive exams.

Plant taxonomyPteridophytesAngiospermsPlant morphologyAlgae and bryophytesClassification systems

Plant Biology and Classification Questions

Multiple choice

Liverworts and mosses are examples of _____________

  1. vascular plants

  2. flowering plants

  3. non vascular plants

  4. seed plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Liverworts and mosses belong to the group of bryophytes, which are characterized as non-vascular plants because they lack true vascular tissue.

Multiple choice

Which division only has one species?

  1. Gnetophyta

  2. Cycadophyta

  3. Gingkophyta

  4. Coniferophyta
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The division Ginkgophyta contains only one extant species, Ginkgo biloba, making it a living fossil.

Multiple choice

Which of these are vascular plants?

  1. horsetails

  2. ferns

  3. club mosses

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Horsetails, ferns, and club mosses are all examples of seedless vascular plants, which possess xylem and phloem but reproduce via spores.

Multiple choice

Horsetails are 

  1. lycophytes

  2. pterophytes

  3. arthrophytes

  4. bryophytes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Horsetails belong to the division Equisetophyta, which is also commonly referred to as Arthrophyta due to their jointed stems.

Multiple choice

Another name for biological compound is:

  1. Biological compound

  2. Organic compound

  3. Aromatic Compound

  4. Distillery compound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Organic compounds are defined as compounds containing carbon-hydrogen bonds, which are the basis of all biological life.

Multiple choice

An autotroph and a heterotroph are shown. Which statement is true?

  1. The tree is an autotroph and the bear is a heterotroph

  2. the tree is a heterotroph and the bear is an autotroph

  3. both organisms are autotrophs

  4. both organisms are heterotrophs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Autotrophs (like trees) produce their own food through photosynthesis. Heterotrophs (like bears) must consume other organisms to obtain energy.

Multiple choice

The groups into which similar organisms are classified

  1. kingdome

  2. Group

  3. class

  4. bunch

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In biological taxonomy, a kingdom is one of the highest levels of classification for grouping similar organisms. The spelling 'kingdome' is a typo but clearly refers to 'kingdom'.

Multiple choice

A pioneer species can be found in which level of succession?

  1. Primary

  2. Secondary

  3. Tertiary

  4. Climax Community
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pioneer species are the first organisms to colonize a previously barren environment, such as bare rock after a volcanic eruption or glacier retreat, which defines primary succession.

Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

Which one of the following sequences represents the CORRECT taxonomical hierarchy 

  1. Species, genus, family, order

  2. Order, genus, family, species

  3. Species, order, genus, family

  4. Species, genus, order, family
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The correct taxonomic hierarchy in ascending order is Species, Genus, Family, Order, Class, Phylum, Kingdom.

Multiple choice evs i love gujarat flora and fauna in forest ecosystem threatened species need of conservation

_________ is a taxonomic aid which contains the actual account of habitat and distribution of plants of a given area and also provides the index to the plant species found in a particular area.

  1. Flora

  2. Key

  3. Monograph

  4. Manual
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Flora contains the actual account of habitat and distribution of plants of a given area. These provide the index to the plant species found in a particular area.

Multiple choice botany photosynthesis cam cycle cam plants photosynthetic cycle

CAM plants are mainly

  1. Succulent xerophyte

  2. Hydrophytes

  3. Epiphyted

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CAM plants are mainly succulent xerophytes. Besides C3 and C4 cycles, Crassulacean acid metabolism is a third mechanism for fixing carbon dioxide. It is found not only in members of the family Crassulaceae eg., Kalanchoe, Sedum, Crassula, but also in the members of family Cactaceae example Opuntia. Besides it also occurs in some members of Liliaceae, Orchidaceae, Bromeliaceae, Euphorbia sp and pteridophytes like Isoetes. In CAM plants the stomata are open at night and during day time the stomata remain close.

Therefore, the correct answer is option A.

Multiple choice botany photosynthesis cam cycle cam plants photosynthetic cycle

CAM plants belong to .......... family.

  1. Malvaceae

  2. Crassulaceae

  3. Trapaceae

  4. Orchidaceae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CAM stands for crassulacean acid metabolism because it was first studied in members of the plant family Crassulaceae (Bryophyllum). CAM is the fixation of carbon dioxide by plants in arid condition. In normal conditions, the opening of the stomata is always connected with the large losses of water. To inhibit this loss during intense sunlight, CAM plants have developed a mechanism which allows the uptake of carbon dioxide during the night. They are more common than C$ _4$ plants and include cacti and a wide variety of other succulent plants. So, the correct answer is 'Crassulaceae'.