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

Which of the following statements is incorrect?

  1. Many algae show haplontic life cycle.

  2. In gymnosperms, the male and the female gametophytes do not have an independent free-living existence.

  3. In pteridophytes, the main plant body is a sporophyte.

  4. In bryophytes, the dominant phase in the life cycle is the gametophyte.

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

All the above statements are correct.

Multiple choice

Saprolegnia is an example of

  1. sporangiospores

  2. chlamydospores

  3. zoospores

  4. oidia

  5. conidia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

They are motile and flagellated spores.

Multiple choice

Biosystematics aims at

  1. identification and arrangement of organisms on the basis of their cytological characteristics

  2. the classification of organisms based on broad morphological characters

  3. delimiting various taxa of organisms and establishing their relationships

  4. the classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biosystematics is the study of diversity of organism and all their comparative and evolutionary relationships.

Multiple choice

Which of the following organisms were isolated from Mosses in 2015?

a. Chryseobacterium takakiae b. Chryseobacterium polytrichastri c. Chryseobacterium arachidiradicis d. Chryseobacterium shandongense

  1. a,b,c and d

  2. a and b

  3. a and d

  4. a, c and d
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bacteria a and b were isolated from moss in 2015. Chryseobacterium takakiae has been isolated from the moss takakia lepidozioides from the Gawalong glacier in Tibet in China and bacteria Chryseobacterium polytrichastri has been isolated from the moss polytrichastrum formosum from the Gawalong glacier from Tibet in China.

Multiple choice

________ is not a feature of pteridophytes.

  1. Rhizoids

  2. Vascular tissue

  3. Embryo

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

Pteridophytes (ferns) have true roots, vascular tissue, and embryophyte status, but they do NOT have rhizoids - rhizoids are found in bryophytes (mosses). Pteridophytes have rhizomes (underground stems), which are different from rhizoids.

Multiple choice

Which of the following pairs is incorrectly matched?

  1. Gymnosperms - Cycas, Ginkgo

  2. Red algae - Gelidium, Polysiphonia

  3. Bryophytes - Funaria, Marchantia

  4. Angiosperms - Adhatoda, Cedrus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Angiosperms are so named because the seeds are enclosed within a flower, which has male and female reproductive structures. Gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed or naked both before and after fertilisation. Adhatoda is an angiosperm, but cedrus belongs to gymnosperm.

Multiple choice

Bryophytes resemble algae in most of the aspects, except in the

  1. presence of thalloid plant body

  2. presence of vegetative reproduction

  3. independence on water for fertilisation

  4. presence of jacketed and multicellular sex organs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sex organs are well developed and multicellular. Sexual reproduction is not well organized in algae and sex organs are not complex but unicellular.

Multiple choice

Which of the following is a set of red algae?

  1. Laminaria, Rhodella, Fucus

  2. Gelidium, Nostoc, Laminaria

  3. Gelidium, Nemalion, Fucus

  4. Rhodella, Nemalion, Gelidium

  5. Vaucheria, Nostoc, Rhodella
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct answer. Rhodella, Nemalion and Gelidium are genus of red algae.