Tag: zoology

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Questions Related to zoology

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

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.

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

Seedless Grapes are the.

  1. Simple Dry fruits

  2. Multiple fruits

  3. Aggregate fruits

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

Simple fruits are from a single flower with one pistil. Aggregate fruits are from a single flower with many pistils. Multiple fruits are from many florets. In the inflorescence, fruitlets fuse together into one, bigger fleshy fruit.

Parthenocarpic fruit matures to be fleshy without the ovules ripening into seeds. The process of producing fruits without the fertilization of any seeds, which makes them seedless, is termed parthenocarpy. Thus answer is Parthenocarpic.

The correct option is D.   

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

Formation of fruit without fertilization is

  1. Apogamy

  2. Apospory

  3. Syngenesis

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

A) Apogamy- In this process, a haploid cell of female gametophyte (except egg cell) is responsible to form diploid embryo without fertilization.

B) Apospory- Formation of gametophyte directly from a sporophyte without meiosis is called apospory.
C) Syngenesis- It is a type of reproduction in which male and female take part. Male plant contributes spermatozoa and female plant contribute ovum thus the resultant embryo is derived from both the parents. 
D) Parthenocarpy- Parthenocarpy is natural or artifical development of seedless fruit without ferilization of ovules. Eg: Pineapple, orange, cucumber.
So, the correct answer is 'Parthenocarpy'.