Tag: plants: structure and function

Quizzes (27) Questions (150)

Questions Related to plants: structure and function

Multiple choice biology fruit and seed morphology of the fruit fruit plants: structure and function

A small, dry, one-seeded fruit with its pericarp fused with the seed-coat, developing from a monocarpellary gynoecium is called ____________.

  1. Cypsela

  2. Siliqua

  3. Caryopsis

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

A small dry one-seeded fruit with pericarp fused with seed coat which develops from monocarpellary gynoecium i.e from a superior monocarpellary ovary is called caryopsis. 

Examples- Maize, wheat. 

Multiple choice biology fruit and seed morphology of the fruit fruit plants: structure and function

The type of fruit seen in Jack is.

  1. Citrus fruit

  2. Syconus

  3. Sorosis and multiple fruit

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

  • Multiple fruits are developed from the complete inflorescence which in jack fruits case is spadix. And it is thus called a sorosis type of fruit. 
  • Flowers with many free carpels are apocarpous as seen in the aggregate fruits. 
  • Syconus is the other type of multiple fruits which develops on the ripening of the hypanthium or the coenanthium inflorescence
  • The correct answers are multiple fruit and sorosis 

The correct option is C.

Multiple choice biology fruit and seed morphology of the fruit fruit plants: structure and function

A substance which is used to stimulate the increase in size of the apple fruit is 

  1. Morphactin

  2. Promalin

  3. Ethylene

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

Promalin is a mixture of cytokinin-6-benzaldenine, GA$ _{4}$ and GA$ _{7}$. It is very active in stimulating increase in apple size particularly in red delicious apples.

Multiple choice biology fruit and seed morphology of the fruit fruit plants: structure and function

The ripening of fruits can be accelerated by 

  1. Reducing the supply of water to plant when fruits are maturing

  2. Increasing the supply of nitrogen to the atmosphere surrounding them

  3. Warming up the surroundings artificially

  4. Artificially adding ethylene gas to the atmosphere surrounding them
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ethylene is unique in that it found only in gaseous form, and accelerates ripening of fruits, leaves abscission and promotes senescence.

Multiple choice biology fruit and seed morphology of the fruit fruit plants: structure and function

Berries, drupes and pomes are

  1. Aggregate fruits

  2. Composite fruits

  3. Simple succulent fruits

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

Berries, drupes and pomes develop from a single ovary of a single flower and thus are simple fruits. They also have bulk of their fruit which is fleshy and hence are called succulent.

Agrregate fruits develop from polycarpellary apocarpous ovary.
Composite fruits develops from a inflorescence of several flowers.
The correct answer is 'Simple succulent fruits'.