Biology · Science General

Botany and Plant Science

5,038 Questions

Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.

Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology

Botany and Plant Science Questions

Multiple choice biology locomotion and movements introduction to locomotion skeleton and joints movement in animals

Which of the following is the form of locomotion?

  1. Swimming

  2. Opening of stomata

  3. Blooming of flowers

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

Locomotion can be seen in  different media. 
Animals move through, or on, four types of environment: 

  • Aquatic (in or on water), 
  • terrestrial (on the ground or other surfaces, including arboreal, or tree-dwelling),
  •  fossorial (underground), and 
  • aerial (in the air). Hence, Swimming is the form of locomotion.
So, the correct answer is 'Swimming'.

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

Anther and filament are the parts of 

  1. Style

  2. Stigma

  3. Stamen

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

The style is the part of the pistil which leads to the formation of the pollen tube.
Stigma is the part of the pistil which holds the pollen.
Stamen is the male reproductive part of the flower which is made up of two parts the filament which is a stalk that attaches to anther bilobed structure that forms pollen grains.
The ovary is the main female part that leads to the formation of an ovum.
So, the correct option is 'Stamens'.

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

The part of the plant which produce pollens are 

  1. Ovules

  2. Anther

  3. Filament

  4. Both B and C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anther is the bilobed structure that forms pollen grains which are attached with a stalk known as filament and they combine to form the stamens which are known as the male reproductive part of a plant.

So, the correct option is 'Anther.'

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

Some example are given below how many of them have both following characters?
(1) Axile placentation
(2) Adhesion of stamen
Salyia, Mustard, China rose, Dianthus, Argemone, Tomato, Potato, Oetunia, Gloriosa, Aloe, Sesbania, Trifolium

  1. Three

  2. Four

  3. Seven

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

Axile placentation is found in China rose, Tomato, Potato, Petunia, Aloe. Adhesion of stamen (epipetalous) is found in Solanaceae (Tomato, Potato, Petunia) and Malvaceae (China rose). The intersection is Tomato, Potato, Petunia, China rose.

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

Stamens are also called

  1. Calyx

  2. Corolla

  3. Androecium

  4. Gynoecium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Image result for whorls of flower
The whorl of the flower are differentiated into two categories essential and non-essential whorl and are consists of 
  1. Calyx which is considered as the outermost whorl and its unit is known as sepals and are green in color helps in protection of flower.
  2. Corolla is the second non-essential unit and is composed of petals and are colored and helps to attract pollinators.
  3. Stamens or androecium are the male reproductive part and responsible for the production of pollen grains (male gamete).
  4. Carpels or gynoecium are the female reproductive part and produce ovum (female gamete).
So the correct option is 'Androecium'.
Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

Which of the following characteristics are associated with petals?

  1. Green in colour and leaf-like

  2. Colourful and have different shapes

  3. Male part of the flower

  4. Female part of the flower
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Corolla is the nonessential unit of a flower and is composed of petals and are colored with distinct shapes and sizes which helps to attract pollinators.

So the correct option is 'Colourful and have different shapes'

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

The bisexual flowers contain both

  1. Pistil and stamen

  2. Ovary and anther

  3. Pistil and ovule

  4. Ovary and stamen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Stamen or androecium are the male reproductive part and responsible for the production of pollen grains (male gamete). Pistil or gynoecium are the female reproductive part and produce ovum (female gamete). If both the organs are present it is called bisexual flower. If one of them is present the flower is referred to as unisexual.
So the correct option is 'Pistil and stamen'.

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

The male part of the flower is known as 

  1. Filament

  2. Anther

  3. Stamen

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

Stamens or androecium are the male reproductive part contains filament which is a slender stalk and anther is a bilobed structure which is responsible for the production of pollen grains (male gamete).

So, the correct option is 'Stamen'

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

The classification of the flowers as unisexual and bisexual is on the basis of 

  1. Presence of flowers at the tip of plant

  2. Presence of anther and filament of plant

  3. Presence of stamen and pistil in the flower

  4. Both A and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Stamens or androecium are the male reproductive part and responsible for the production of pollen grains (male gamete). Pistil or gynoecium are the female reproductive part and produce ovum (female gamete). If both the organs are present it is called bisexual flower. If only one of them is present flower is referred to as unisexual.
So the correct option is 'Presence of stamen and pistil in the flower'.

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

Which part of the flower used in the formation of pollen tube?

  1. Style

  2. Stigma

  3. Anther

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

  1. Carpels, pistil or gynoecium are the female reproductive part of the flower that consists of a stigma that holds the pollen grains, the style that leads the path of pollen tube and ovary produce ovum (female gamete). 
  2. Stamens or androecium are the male reproductive part contains filament which is slender stalk and anther is bilobed and responsible for the production of pollen grains (male gamete). 
So the correct option is 'Style'

Multiple choice biology the living world of plants parts of flower and its functions flower to flower parts of a flower

Non-essential parts of flowers are

  1. Sepals and petals

  2. Sepals and carpels

  3. Sepals and gynoecium

  4. Androecium and gynoecium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Non-essential parts of the flowers are the accessory parts that are not directly involved with the gametes formation and sexual reproduction. The whorls of the calyx (individual unit - sepals) and corolla (individual unit - petals) are involved in the protection of flower and attraction of the pollinators, respectively. So, these are considered to be non-essential parts of flowers.

Hence, the correct answer is 'Sepals and Petals'

Multiple choice trihybrid cross classical genetics botany

Self fertilising trihybrid plants form

  1. Eight different gametes and 64 different zygotes

  2. Four different gametes and sixteen different zygotes

  3. Eight different gametes and sixteen different zygotes

  4. Eight different gametes and thirty two different zygotes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A total number of types of gamete produced by an organism is 2$^n$, where n is the number of heterozygous genes present. As we know that trihybrid plant is heterozygous for three genes, these total possible gametes by it = 2$^3$ = 8. During fertilization, any of the 8 types of sperms can fuse with any of the 8 types of egg to produce 64 possible combinations of zygotes. This makes option A correct but C and D wrong. Four different types of gametes are produced by an organism who is heterozygous for two genes; 2$^2$ = 4 and resultant four gametes produce total 4 x 4 = 16 zygotic combinations. Thus, option B is wrong.