Biology

Plant Biology and Classification

1,796 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

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 function of the roots is:

  1. Storing Food

  2. Anchor / Supporting Plant

  3. Absorbing Water & Nutrients

  4. All answers are correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Roots perform multiple critical functions for a plant, including anchoring the plant in the soil, absorbing water and dissolved minerals, and storing food reserves like starch.

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'.

Multiple choice botany pollination and fertilization types of pollination cross pollination pollination and its types

Two plants showing morphological similarities were cross pollinated. But after the mating progeny formation was absent. So the two plants must be considered as?

  1. Same biological species

  2. Allopatric species

  3. Different biological species

  4. Same taxonomic species
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biological species are defined by the ability of populations to interbreed and produce fertile offspring. If two plants show morphological similarities but fail to produce progeny after mating (reproductively isolated), they belong to different biological species, regardless of their physical resemblance.

Multiple choice botany families of angiosperms family fabaceae eudicots family - fabaceae, sativum and solanaceae study of some important families

Gram belongs to family

  1. Papilionaceae

  2. Asteraceae

  3. Liliaceae

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

Cicer arietinum, commonly known as chickpea, gram or Bengal gram is an annual legume belonging to family Fabaceae or Papilionaceae. The chickpea seeds are rich in protein. It is one of the earliest cultivated legumes and it is native to Middle East countries. It is used for human consumption and it is also used as animal fodder because it is rich in protein content. So, the correct answer is 'Papilionaceae'.

Multiple choice botany families of angiosperms family fabaceae eudicots family - fabaceae, sativum and solanaceae study of some important families

The two families dominate in having maximum useful plants

  1. Fabaceae and Poaceae

  2. Liliaceae and Solanaceae

  3. Malvaceae and Brassicaceae

  4. Liliaceae and Poaceae
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Fabaceae or Leguminosae is commonly known as the legume or pea family. They are economically important family of flowering plants. The Poaceae are a large family of monocotyledonous flowering plants. The Poaceae is the fifth largest plant family. Poaceae belongs to grass family of monocotyledonous flowering plants. It produces economically useful plants such as Barley, Maize, Oats, Rice, Bamboo, Meadow-grass, Ryegrass, etc. Most of the economically important plants in Febaceae family are herbs. 

Thus, the correct answer is option A.

Multiple choice botany families of angiosperms family fabaceae eudicots family - fabaceae, sativum and solanaceae study of some important families

Family Fabaceae belongs to series

  1. Inferae

  2. Thalamiflorae

  3. Calyciflorae

  4. Disciflorae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Disciflorae is an artificial group of plants based on Bentham and Hooker classification. The group Disciflorae are polypetalous and dicotyledonous. It comprises flowers having prominent disc-shaped thalamus below the ovary. The ovary is superior. Fabaceae or Leguminosae is a large and economically important family of flowering plants. Fabaceae belongs to the series Disciflorae

So, the correct answer is 'Disciflorae'

Multiple choice botany families of angiosperms family fabaceae eudicots family - fabaceae, sativum and solanaceae study of some important families

The distinct features of fabaceae are

  1. Zygomorphic, diadelphous and monocarpellary

  2. Actinomorphic, monadelphous and monocarpellary

  3. Zygomorphic, monadelphous and pentacarpellary

  4. Zygomorphic, polyadephous and tricarpellary

  5. Zygomorphic, diadephous and bicarpellary
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fabaceae or Leguminosae is a large and economically important family of flowering plants. In Fabaceae, the flowers are zygomorphic (radial symmetry), bisexual. The stamens are 10, diadelphous (stamens united by their filaments so as to form two groups). The gynoecium is monocarpellary, syncarpous, superior ovary.

So, the correct answer is 'Zygomorphic, diadelphous and monocarpellary'.