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

Which type of placentation is present in Beans & Pea?

  1. Marginal placentation

  2. Axile placentation

  3. Free central placentation

  4. Free basal placentation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Here the ovary is monocarpellary, monolocular and the placenta is on the ventral suture. The ovules are attached to the placenta which is on the margin. The prominent examples are Beans, Pea, etc.

Multiple choice

Which of the following stele, evolved first and is the most primitve type?

  1. Haplostele

  2. Siphonostele

  3. Solenostele

  4. Amphiphloic siphonostele

  5. Protostele
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The earliest vascular plants had stems with a central core of vascular tissue. This consisted of a cylindrical strand of xylem, surrounded by a region of phloem. Around the vascular tissue there might have been an endodermis that regulated the flow of water into and out of the vascular system. Such an arrangement is termed a protostele.

Multiple choice

Protosteles are found in

  1. bryophyta

  2. gymnosperms

  3. pteridophyta

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

Protostele is the simplest type of stele that comprises the central core of xylem surrounded by phloem, pericycle and endodermis. 

Multiple choice

Bryophytes resemble algae in most aspects, except the

  1. presence of thalloid plant body

  2. presence of vegetative reproduction

  3. dependence 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. 

Multiple choice

Which of the following statements is true about enolpyruvylshikimate phosphate (EPSP) synthase?

  1. It converts phosphoenol pyruvate to pyruvate.

  2. Glyphosate induces EPSP synthase.

  3. Inhibition of EPSP synthase blocks aromatic acid synthesis.

  4. Underproduction of EPSP synthase is helpful in somatic embryogenesis.

  5. EPSP synthase is not required for plant cells.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glyphosate inhibits EPSP synthase, thereby inhibiting aromatic acid biosynthasis.

Multiple choice

Cuscuta is an example of ____________.

  1. host

  2. saprotroph

  3. insectivores

  4. autotroph

  5. parasite
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Cuscuta or amarbel lacks chlorophyll and cannot manufacture its own food. It climbs on other plants to derive nutrition from them. Since it deprives the host of valuable nutrients, it is called a parasite.

Multiple choice

Which of the following statement/s is/are correct? (a) Fungi reproduce using spores that germinate and grow into a new fungus. (b) Heterotrophic plants do not have chlorophyll. (c) The food is sent to other parts of the plant through the stomata.

  1. only a

  2. only b

  3. only c

  4. both a and b

  5. a, b and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi reproduce using spores that germinate and grow into a new fungus. Heterotrophic plants do not have chlorophyll  and cannot produce food by photosynthesis. Both statements are correct.

Multiple choice

Why are fungi placed in a distinct kingdom?

  1. Because they do not undergo mitosis.

  2. Because they reproduce asexually.

  3. Because their sexual reproduction involves the union of different mating types strains.

  4. Because they have characteristics that are both plant-like and animal-like.

  5. Because they are non green and can not produce their own food.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi are unique because they are immotile and have a cell wall (like most plants), but are heterotrophic and not photosynthetic (like most animals).