Sunday, January 3, 2021

Reproduction in Organisms | Class 12 Botany| Previous Years Questions and Answers (2018 to 2020)

 1. REPRODUCTION IN ORGANISMS


2020 SAY

1.  Notice the organisms given below: (2)

Leech, Cockroach, Dog, Earthworm

(a)    Choose hermaphrodite organism from the above.

(b)   Define hermaphrodite.

ü Answer:

(a) Leech / Earthworm.

(b) It is the organism that has both male and female reproductive organs.

2.   Match the items of column A with B. (2)

A

B

(a)    Ginger

     I.     Bulbil

(b)   Water hyacinth

   II.     Leaf bud

(c)    Agave

 III.     Tuber

(d)   Bryophyllum

 IV.     Rhizome

 

   V.     Offset

ü Answer:

A

B

(a)    Ginger

Rhizome

(b)    Water hyacinth

Offset

(c)    Agave

Bulbil

(d)    Bryophyllum

Leaf bud

 

2020 MARCH

1.   What is a Clone? (1)

ü Answer:

It is a morphologically and genetically similar individuals/ cells.

2.   Match the columns A and B. (2)

A

B

(a)    Rhizome

i)      Agave

(b)   Bulbil

ii)     Water hyacinth

(c)    Offset

iii)   Ginger

(d)   Leaf buds

iv)    Potato

 

v)     Bryophyllum

ü Answer:

A

B

(a)    Rhizome

(iii) Ginger

(b)    Bulbil

(i) Agave

(c)    Offset

(ii) Water hyacinth

(d)    Leaf buds

(v) Bryophyllum

 

2019 SAY June

1.   Choose the correct answer. (1)

A parthenocarpic fruit is:

a.      Banana

b.     Apple

c.      Strawberry

d.     Guava

ü Answer:

(a) Banana.

2.   Some organisms develop through parthenogenesis. Define this phenomenon and give an example. (2)

ü Answer:

Parthenogenesis is the development of unfertilized egg into a new organism. E.g. Honeybees, some lizards, Turkey etc.

2019 MARCH

1.   Write the asexual reproductive structures given in the diagrams (a), (b), (c) and (d). (2)

         

ü Answer:

(a) Zoospores

(b) Conidia

(c) Bud

(d) Gemmule


2018 SAY June


1.   Primate and non-primate female mammals exhibit cyclic changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase. Name the cyclic changes in these group. (2)

ü Answer:

Primates: Menstrual cycle.

Non-primates: Oestrous cycle.


2.   Bamboo species and Strobilanthus Kunthiana exhibit usual flowering phenomena. Explain their flowering characteristics. (2)

ü Answer:

Bamboo species: Flowering only after 50-100 years. Strobilanthus Kunthiana: Flowering only once in 12 years.


2018 MARCH


1.   Match the following organisms to their life span. (2)

A

B

1. Butterfly

a. 140 years

2. Crow

b. 100 to 150 years

3. Parrot

c. 1-2 weeks

4. Tortoise

d. 15 years

 

e. 60 years

ü Answer:

A

B

1. Butterfly

c. 1-2 weeks

2. Crow

d. 15 years

3. Parrot

a. 140 years

4. Tortoise

b. 100 to 150 years


 

>> Online Unit Test Click Here

 

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