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 botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Which symbiotic relationship is NOT observed between Rhodium species and plants modulated?

  1. R. Meliloti: Trigonella foenumgracum

  2. R. Leguminosarum: Lens esculenta

  3. R. Japonicum: Glycine max

  4. R. Lupini: Cajanus cajan
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pairing R. Meliloti with Trigonella foenum-graecum is incorrect because R. meliloti typically nodulates Medicago, Melilotus, and Trigonella, but the specific pairing listed here is often cited as a mismatch in specific textbook contexts regarding host specificity.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Consider the following statements.
a. Anthoceros has isomorphic alternation of generations and saprophyte is green
b. Riccia has heteromorphy alteration of generations and its saprophyte is non-green.
Which of the statements given is/are correct?

  1. $1$ only
  2. $2$ only
  3. Both $1$ and $2$
  4. Neither $1$ nor $2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

One of the following is a saprophyte.

  1. Monotropa$/$ Neottia

  2. Utricularia

  3. Dionaea

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

Monotropa (Indian pipe) and Neottia (bird's-nest orchid) are classic examples of myco-heterotrophic plants that function as saprophytes, obtaining nutrients from decaying organic matter via fungal intermediaries.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Water lily is a/an 

  1. Algae

  2. Mesophyte

  3. Fern

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

Often found on floating plants, many hydrophytes have air sacs that help the plant float on the surface of the water. The water chestnut is one example, which includes a beautiful cluster of green leaves with white flowers, attached to a fine root system. It is important to note that some aquatic plants will float slightly submerged in the water, such as the buttercup. Others, such as water lilies, will float up on top of the surface since their leaves distribute the weight across the surface of the water. 

Therefore, the correct answer is option D.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

An example of a plant that lives in water is 

  1. Opuntia

  2. Hydrilla

  3. Touch-me-not

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

Hydrilla is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. Opuntia, touch me not and Calotropis lives on land. Thus, option B is correct and other options are wrong.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Hydrophyte with both hydrophytic and xerophytic traits is

  1. Agave

  2. Nerium

  3. Vallisneria

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

The question asks for a hydrophyte with both hydrophytic and xerophytic traits. None of the listed options (Agave is a xerophyte, Nerium is a xerophyte, Vallisneria is a hydrophyte) fit the description of a plant that exhibits both sets of traits.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Hydrilla is

  1. Phytoplankton

  2. Floating hydrophyte

  3. Submerged hydrophyte

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

Hydrophytes are aquatic plants that live in water and are evolutionarily suited to thrive in aquatic environments. Hydrilla, also called waterthyme is a submerged hydrophyte, which is a troublesome aquatic weed at many places.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Large sized rooted plants founds in shallow waters are called 

  1. Macrophytes

  2. Microphytes

  3. Phagophytes

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

The plants which can live only in water are called hydrophytes. Among these hydrophytes, there are different sizes and classification based on them. The large sized hydrophytes are called macrophytes. As macro suggests large size.

So, option A is the correct answer.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Which one of the following hydrophytes has its roots fixed in mud and leaves floating on water?

  1. Ceratophyllum

  2. Najas

  3. Trapa

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

Ceratophyllum (hornwort) is a free-floating hydrophyte with roots that anchor in mud at the bottom while leaves float on or near the water surface. Najas is completely submerged, Trapa (water chestnut) has floating leaves but different growth form, and Utricularia (bladderwort) is also typically submerged or free-floating. The key distinction is Ceratophyllum's mud-anchored roots with floating foliage.