Tag: the life cycle of plants

Quizzes (23) Questions (114)

Questions Related to the life cycle of plants

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

In which of the following plants, it is undesirable to obtain seedless fruits?

  1. Tomato

  2. Orange

  3. Watermelon

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

Parthenocarpy is the phenomenon behind most seedless fruits.  Parthenocarpy is fruiting without the union of a male and a female egg cell.  The lack of fertilization means that there are no seeds in the fruit.  If there are seeds, they are not viable and are not capable of germinating. Parthenocarpy is not found beneficial in only one type of fruits, that is pomegranate. It is because seeds are the edible parts in this fruit.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Process of formation of an individual without contribution of father is called as

  1. Epigenesis

  2. Pangenesis

  3. Induction

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

The process of sexual reproduction usually involves gametogenesis, which generates haploid gametes (sperm and ovum) and their fusion during fertilization. Sometimes an embryo can develop without participation of male gamete (sperm). Parthenogenesis is a type of asexual reproduction in which females produce offspring from unfertilized eggs i.e., the development of an unfertilized egg into an adult organism. It is common among honeybees, wasps, and certain other arthropods.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Natural parthenogenesis occurs in

  1. Dog

  2. Honey-bee

  3. Frog

  4. House-fly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Parthenogenesis is a type of asexual reproduction in which an unfertilized egg develops into an adult animal. The adult is typically haploid. Parthenogenesis is common among insects (especially honeybees and wasps) and crustaceans; it also occurs among some other invertebrate and vertebrate groups, including some species of nematodes, gastropods, fishes, amphibians, and reptiles. Thus, the correct answer is option B.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Eggs of which one of these can develop parthenogenetically by chemicals?

  1. Man

  2. Frog

  3. Sea urchin

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Artificial parthenogenesis can be induced in eggs of both frog and sea urchin but chemical (hypertonic sea water) induction occurs in sea urchin, whereas, frog eggs when pricked with a needle can undergo parthenogenesis. Thus, the correct answer is option C.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Read the following statements $1$ and $2$ and identify the correct one.
$(1)$ In bees parthenogenetic zygote develops into monoploid male
$(2)$ The fertilised egg develops into diploid female.

  1. $1$ is correct, $2$ is not correct
  2. Only $2$ is correct
  3. Both $1$ and $2$ are incorrect
  4. Both $1$ and $2$ are correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In social bees like honeybees, unfertilized eggs develop via arrhenotokous parthenogenesis into haploid (monoploid) males, also known as drones. Fertilized eggs develop into diploid females, which can become workers or queens depending on their nutrition.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Parthenocarpy is the production of 

  1. Fruits with pollination

  2. Fruits without fertilization

  3. Seeds with fertilization

  4. Only seeds and no fruits
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In angiosperms, fruits represent ripened ovary of the flower. Fruit formation starts after fertilisation. However, sometimes fruit formation can be carried out without fertilization. Such, fruits are called as parthenocarpic fruits. They are seedless and lack embryo because no fertilization has occurred. Phytohormone auxins promote parthenocarpy. They have been used to induce parthenocarpy in tomatoes.

Thus, the correct answer is option B.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

.......... is a form of reproduction which does not involve a male gamete.

  1. Fragmentation

  2. Spores

  3. Budding

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

Fragmentation, budding and spore formation are types of asexual reproduction where no gamete formation takes place. Here, a single organism produces offspring without the involvement of any other organism or gamete formation.

While agamogenesis does not involve a male gamete though organisms Are capable of producing male gametes or undergoing sexual reproduction. Parthenogenesis is an example of agamogenesis in which an unfertilized egg develops into a new individual. Honeybee and turkey undergo parthenogenesis.
So, the correct option is 'Agamogenesis'.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Which of the reproductive strategy is most effective in stable environment and abundant resources?

  1. Sexual reproduction, with intense parental care and slow development

  2. Sexual reproduction, with slight parental care and quick development

  3. Parthenogenesis

  4. All of the above

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

  • Parthenogenesis involves growth and development of embryo from an unfertilised egg cell. 
  • Parthenogenesis will result in offspring that are genetically similar and with stable environment and abundant resources all of them can survive.
  • While, sexual reproduction results in offspring that are not identical and this variation leads to competition for resources.
So, the correct option is 'Parthenogenesis'.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Formation of fruits without fertilization is known as
Or
Ovary $\overset{No   fertilization}{\rightarrow}$ Fruit 
Or
The process of embryo formation without fertilisation is known as

  1. Parthenocarpy

  2. Parthenogenesis

  3. Polyembryony

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

Parthenogenesis is a method of asexual reproduction with embryo formation without fertilization and parthenocarpy involves fruit formation without seed formation. 

Thus, the correct answer is option D.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

Parthenocarpy refers to a fruit 

  1. With seeds after pollination

  2. Without seed after pollination

  3. With viable seed after fertilization

  4. Seedless without fertilization
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The answer is D- seedless without fertilization

Parthenocarpy is fruit production without fertilization of ovules resulting in a seedless fruit formation. 
It may be natural or induced artificially.  Examples of parthenocarpy fruits are watermelon and grapefruits.