CBSE Questions for Class 12 Medical Biology Reproduction In Organisms Quiz 2 - MCQExams.com

Vegetative propagation refers to the formation of new plants from
  • Stem, roots and flowers
  • Stem, roots and leaves
  • Stem, flowers and fruits
  • Stem, leaves and flowers
Fertilization is depicted by which of the following condition? 
  • n $$\rightarrow$$ 2n
  • 2n $$\rightarrow$$ 3n
  • 2n $$\rightarrow$$ 4n
  • 4n $$\rightarrow$$ 8n
The development of an offspring from any part of the body is called:
  • Asexual reproduction
  • Sexual reproduction
  • Vegetative reproduction
  • All of the above
Which of the following are the characteristics of vegetative reproduction?

   X - Involves two individuals. 

   Y - Daughter cells are genetically identical to the parent.

   Z - The cell divisions are only mitotic.
  • X and Y only
  • X and Z only
  • Y and Z only
  • X, Y and Z
Which one among the following reason for the appearance of variations among the progeny formed by sexual reproduction?
  • Sexual reproduction involves two parents with different sets of characters
  • The gene combinations are different in gametes which are fertilised
  • Asexual reproduction involves two parents with different sets of characters
  • Both A and B
 Parthenogenesis occurs in which of the following animal?
  • Sheep
  • Sponges
  • Ant
  • Hydra
A sexual reproduction by fragmentation takes place in-
  • Amoeba
  • Yeast
  • Spirogyra
  • Moss
The given figure represents:

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  • Budding in Hydra
  • Budding in Planaria
  • Regeneration in Planaria
  • Budding in Saccharomyces (yeast)
Gametes of similar morphology fuse in 
  • Oogamy
  • Isogamy
  • Anisogamy
  • None of the above
The fusion of male and female gametes which are similar in size, shape, structure and behaviour is termed as
  • Oogamous
  • Anisogamous
  • Conjugation
  • Isogamous
Fusion of male and female gametes is termed as-
  • Reproduction
  • Vegetative propagation
  • Cell-division
  • Respiration.
Sexually reproducing larva shows ____.
  • Isogamy
  • Anisogamy
  • Paedogenesis
  • Autogamy
Which of the following types of sexual reproduction is found in algae?
  • Isogamous only
  • Anisogamous only
  • Oogamous only
  • All of the above
Birds are:
  • Oviparous with internal fertilization
  • Oviparous with external fertilization
  • Ovoviviparous
  • Viviparous
Eggs of which one of these can develop parthenogenetically by chemicals?
  • Man
  • Frog
  • Sea urchin
  • All of the above
Vegetative propagation refers to formation of new plants from:
  • Stem, roots and leaves
  • Leaves, flowers and seeds
  • Stem, roots and seeds
  • Fruits, seeds and spores
Type of fertilization (external or internal) depends on
  • Structure of egg
  • Site of embryo development
  • Type of sperm
  • Both A and B
Natural parthenogenesis occurs in
  • Dog
  • Honey-bee
  • Frog
  • House-fly
Process of formation of an individual without contribution of father is called as
  • Epigenesis
  • Pangenesis
  • Induction
  • Parthenogenesis
Development of an unfertilized egg is called
  • Parthenogenesis
  • Metamorphosis
  • Gametogenesis
  • Paedogenesis
The plant/s in which vegetative propagation is found naturally is/are:
  • Bryophyllum
  • Sugarcane
  • Rose
  • All of the above
The phase of menstrual cycle in humans, that lasts for 3 - 5 days is 
  • Follicular phase
  • Ovulatory phase
  • Luteal phase
  • Menstruation
Regeneration is the process of:  
  • Renewal
  • Restoration and growth
  • Death
  • Both A and B
Diploid parthenogenesis is characteristics of ________.
  • Solanum
  • Crepis
  • Taraxacum
  • All above
Power of regeneration is found in:
  • Planaria
  • Hydra
  • Both A and B
  • None of the above
In mammals, except primates, heat condition develops in
  • Late stage of pre-estrus phase
  • Estrous phase
  • Early stage of meta-estrus phase
  • Diestrus phase
Purpose of tubectomy is to prevent
  • Fertilization
  • Coitus
  • Egg formation
  • Embryonic development
Menstruation is caused by
  • Increase in FSH level
  • Fall in oxytocin level
  • Fall in progesterone level
  • Increase in estrogen level
Fertilization can be correctly defined as fusion of
  • Male and female pronuclei.
  • Cytoplasm of male and female gametes.
  • Two gametes.
  • Male and female gametes of the same species.
Which one of the following is the incorrect matching of the events occuring during menstrual cycle?
  • Menstruation : Breakdown of endometrium and ovum not fertilised
  • Ovulation : LH attain peak level and sharp fall in the secretion of progesterone
  • Proliferative phase : Rapid regeneration of endometrium and maturation of Graafian follicle
  • Development of corpus luteum : Secretory phase and increased secretion of FSH
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