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 biology seeds - structure and germination germination seed germination the flower

The character found only in halophytes is

  1. Vivipary

  2. Vekamen

  3. Heterophylly

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

Vivipary is the special type of seed germination. During germination, seed is till attached to parent plant and nourished by it. It generally occurs in mangrove plant. The mangrove plants are generally medium sized tree which grow in salty marshes of sea coasts. (eg. Rhizophora, Sonneratia, Avicennia). The seeds of mangrove plants cannot germinate on the marshy habitat because of the excessive salt concentration and lack of oxygen. So, the correct answer is ‘Vivipary’.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Vivipary is characteristic of

  1. Mesophytes

  2. Xerophytes

  3. Hygrophytes

  4. Halophytes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Vivipary plants grow in high saline area.
A. Mesophytes- A plant need a moderate amount of water.
B. Xerophytes- A plant need a little liquid water(In dessert or in ice).
C. Hygrophytes- A plant grow in wet conditions.
D. Halophytes- A plant of high salt tolerent grows in water of high salinity.
So, the correct answer is 'Halophytes'.
Multiple choice biology seeds - structure and germination germination seed germination the flower

During the germination of coconut, the major stored food is digested by.

  1. a-amylase

  2. Lipase

  3. Protease

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

Coconut is an oil seed with an endosperm rich in fats and lipids. During germination, the stored lipids must be broken down by lipases to provide energy and carbon skeletons for the growing embryo.

Multiple choice botany root - external morphology root systems root system in plants forms of root

An example of fresh water, rootless insectivorous plant is

  1. Drosera

  2. Dionaea

  3. Dinoflaggelata

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

Dionaea is an example of fresh water, rootless insectivorous plant. Dionaea, is a carnivorous plant native to subtropical wetlands. It catches its prey, chiefly insects and arachnids, with a trapping structure formed by the terminal portion of each of the plant's leaves and is triggered by tiny hairs on their inner surfaces. When an insect or spider crawling along the leaves contacts a hair, the trap closes if a different hair is contacted within twenty seconds of the first strike. The requirement of redundant triggering in this mechanism serves as a safeguard against a waste of energy in trapping objects with no nutritional value.

Multiple choice biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

Which of the following is regarded as equivalent to perianth?

  1. Glume

  2. Lodicule

  3. Superior palca

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

A lodicule is one of two or three small scales at the base of the ovary in a grass flower that represent the corolla, believed to be a rudimentary perianth. For example, wheat (Triticum aestivum).

Thus, the correct answer is option B.

Multiple choice biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

Individual members of perianth are called ________.

  1. Bracteoles

  2. Bracts

  3. Spathes

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

In some flowers like onion and Asphodelus, the calyx and corolla are not distinct. They are collectively called the perianth. The perianth is an accessory whorl whose individual member is called tepal. Based on the appearance, the tepals can be petaloid (coloured) or sepaloid (green).

Hence, the correct answer is 'Tepals'

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Medullary rays are made up of ________________.

  1. Parenchymatous cells

  2. Sclerenchymatous cells

  3. Tracheids

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

Medullary rays are extensions of the renal medulla into the renal cortex, consisting of straight tubules and collecting ducts, which are supported by parenchymatous tissue.

Multiple choice botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

Mangroves are

  1. Xerophytes

  2. Hydrophytes

  3. Halophytes

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

Halophytes are plants of saline habitats. Mangroves are marshy areas found in tropical deltas and saline ponds near sea shore. The areas have not only excess salt but also excess water or anaerobic conditions, besides difficulty in anchoring and seed germination. Plants growing in mangroves are halophytes.

Multiple choice botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

Pneumatophores are characteristic feature of ....................

  1. Hydrilla

  2. Rhizophora

  3. Typha

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

Pneumatophores are specialized root structures, that grow out from the water surface and facilitate the aeration, necessary for root respiration, present in mangroves like Rhizophora. 

Multiple choice botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

Plants growing in saline and marshy conditions are called as

  1. Lithophytes

  2. Mesophytes

  3. Halophytes

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

Halophytes are plants of saline habitats, which have the ability to tolerate high salt content. They are able to obtain water supply inspite of high salt content in soil. They grow in saline soil, e.g., mangroves.

Multiple choice botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

Dunaliella, a green alga is a halophyte, which stores

  1. Proline

  2. Sorbitol

  3. Glycerol

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

Halophytes grow in soil which is physiologically dry. The soil is having lots of salts, hence, halophyte plants have devised various adaptations to absorb water. A green halophytic alga Dunaliella, found in hypersaline lakes, accumulates glycerol in its cells to help in osmoregulation.

Multiple choice botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

Plants living partly inside water and partly above it are :

  1. Xerophytes

  2. Thallophytes

  3. Hydrophytes

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

Helophytes are plants in which the roots lie under the soil below the water level, but the aerial shoots protrude and develop above the water. Examples include Typha minima, common reed, etc.

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

Partially heterotrophic members of kingdom plantae are

  1. Insectivorous plants

  2. All algae

  3. most bryophytes

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

(A) Insectivorous plants are the plants that feed on insects.

(B) Algae are photosynthetic eukaryotic plants.
(C) Bryophytes are small, non-vascular plants, such as mosses, liverworts, and hornworts.
(D) Pteridophyte is the vascular plant that disperses spore.
So, the correct option is 'Insectivorous plant'.