Tag: plant kingdom

Quizzes (21) Questions (340)

Questions Related to plant kingdom

Multiple choice morphology of angiosperms introduction to angiosperms morphology of flowering plants plant kingdom biology

Which one of the following pairs is correctly matched?

  1. Chryanthemum- Natural parathyroid

  2. Leucaena - Dye

  3. Acacia- Essential oil

  4. Casuraina- Fodder
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chrysanthemum is the source of pyrethrum, a natural insecticide derived from its flowers, often referred to as a natural parathyroid (though technically a pyrethrin). The other options are incorrectly matched regarding their primary economic or chemical uses.

Multiple choice morphology of angiosperms introduction to angiosperms morphology of flowering plants plant kingdom biology

How many of the following characters are suitable to pea plant in the vegetative stage

1. Superior ovary
2. Marginal placentation
3. Gamosepalous condition
4. Papilionaceous corolla
5. Zygomorphic flowers
6. Non-endospermic seeds
7. Stipulate leaves
8. Pinnate compound leaves
9. Root Nodules
10. Foliaceous stipules

  1. 10

  2. 6

  3. 7

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

All of the above characters are seen in the pea plant in the vegetative stage 


1) It has a superior ovary because the ovary is attached to the receptacle above the attachment of other floral parts. 

2) It is said to have marginal placentation because the ovary in which the placenta forms a ridge along the ventral suture of the ovary and the ovules develop on two separate rows.
3) It is gamosepalous because the sepals are partly or completely united
4) It is papilionaceous corolla it has a corolla with usually five petals that include a large upper petal enclosing two lateral wings and a lower carina of two united petals.
5) It has zygomorphic flowers because the flower is bilaterally symmetrical 
6) It is said to have Non-endospermic seeds as because endosperm is absent in the pea seeds
7) It has stipulate leaves because of the presence of stipules near the node of leaves.
8)It has pinnately compound leaves because a row of leaflets forms on either side of an extension of the petiole called the rachis.
9) It has Root nodules because of the symbiotic relationship between nitrogen-fixing bacteria which forms nodules on roots.
10)it has foliaceous stipules because the stipules are green and expanded like leaves.
So, the correct option is A.

Multiple choice morphology of angiosperms introduction to angiosperms morphology of flowering plants plant kingdom biology

Stamens of Jowar$/$ Grass are

  1. Dorsifixed

  2. Versatile

  3. Basifixed

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

Stamens of Jowar/Grass are versatile. It implies that their filaments are attached to anther at a point on the connective. Due to this, the anthers can swing freely. This type of arrangement is useful because grasses use wind as the pollinating agent. Freely swinging anthers can dehisce and release the pollen grains in the wind, they can be carried to the suitable stigma.

Hence, the correct answer is 'Versatile'

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Selaginella and Salvinia are considered to represent a significant step toward the evolution of seed habit because 

  1. Embryo develops in female gametophyte which is retained on parent sporophyte

  2. Female gametophyte is free and gets dispersed like seeds

  3. Female gametophyte lacks archegonia

  4. Megaspore possess endosperm and embryo surrounded by seed coat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and small (micro) spores are known as heterosporous. Microspore and macrospore germinate and gives rise to male and female gametophyte respectively. The female gametophytes in these plants are retained on the parent sporophyte for a variable period. The development of the zygote into young embryo takes place within the female gametophytes. This event is a precursor to the seed habits considered an important step in evolution. So, the correct answer is 'Embryo develops in female gametophyte which is retained on parent sporophyte'.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Spindle shaped male gametes are found in

  1. Lycopodium

  2. Pteris

  3. Pteridium

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

Selaginella is a pteridophyte also known as spike moss or little club moss. It is a tropical plant. It has world wide distribution. It grows in damp forests. Some species occur in temperate regions. They grow in moist shady places. In Selaginella male gametes are spindle shaped and biflagellate. Hence option D is correct.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Selaginella has a tendency to form seed, called seed habit, because it follows 

  1. Retention of megaspore permanently inside the megasporangium

  2. Heterospory

  3. Both above characters

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

Selaginella is a genus of primitive vascular plants in the family Selaginellaceae. Selaginella has a tendency to form seed because the retention and germination of single megaspore within megasporangium to form a female gametophyte led to the phenomenon of seed habit, a characteristic feature of spermatophytes.

So, the correct answer is 'Retention of megaspore permanently inside the megasporangium'.