Seasonal Breeders

Q. Organisms that show cyclical changes during favourable seasons in their reproductive phase are called ____________.

1. continuous breeders
2. biennials
3. Both a and b
4. seasonal breeders

Q. Choose the correct statement/statements from the following statements.
I) Cyclical changes that occur during reproduction in primates is called the menstrual cycle.
II) Bamboo species flower only once in their lifetime, generally after 50-100 years, produce large numbers of fruits and die.
III) Many mammals, especially those living in natural, wild conditions exhibit oestrus cycle only during favourable seasons in their reproductive phase and are called continuous breeders.
IV) During the reproductive phase, there are concomitant changes in the body like slowing of metabolism.

1. I and II are correct
2. II and IV are correct
3. I, III and IV are correct
4. III and IV are correct

Q. Match the following (column 1 with column 2 )
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{p. Monkey}& \text{1. Seasonal breeder}\\ \text{q. Bamboo}& \text{2. Annual plant}\\ \text{r. Sheep}& \text{3. Perennial plant}\\ \text{s. Wheat}& \text{4. Continuous breeder}\end{array}$

1. p-3, q-2, r-4, s-1
2. p-4, q- 3, r- 1, s-2
3. p-2, q-1, r-4, s-3
4. p-1, q-4, r-3, s-2

Q. Match the following (column 1 with column 2 )
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{p. Monkey}& \text{1. Seasonal breeder}\\ \text{q. Bamboo}& \text{2. Annual plant}\\ \text{r. Sheep}& \text{3. Perennial plant}\\ \text{s. Wheat}& \text{4. Continuous breeder}\end{array}$

1. p-2, q-1, r-4, s-3
2. p-3, q-2, r-4, s-1
3. p-4, q- 3, r- 1, s-2
4. p-1, q-4, r-3, s-2

Q. Select the correct statements regarding honeybees.
(i) The queen bee and the worker bees develop from fertilised eggs and are sexually females.
(ii) Males(drones) develop parthenogenetically from unfertilised eggs.
(iii) Queen bee feeds upon royal jelly and the worker bees feed upon bee bread.

1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (iii)
4. (i), (ii), and (iii)

Q. In mammals that are seasonal breeders, females are receptive only once a year. This is called

1. Follicular cycle
2. Luteal cycle
3. oestrous cycle
4. Menstrual cycle

Q.

Assertion: The honey bee queen copulates only once in her lifetime.

Reason: The honey bee queen can lay fertilized as well as unfertilized eggs.

Read the assertion and reason statements carefully and answer the question on the basis of the following options.

1. The assertion is true and the reason is also true; Reason is a correct explanation for Assertion.

2. The assertion is true and the reason is also true; Reason is NOT a correct explanation for Assertion.

3. The assertion is true but the reason is false.

4. The assertion is false but the reason is true.

Q. Choose the correct statement/statements from the following statements.
I) Cyclical changes that occur during reproduction in primates is called the menstrual cycle.
II) Bamboo species flower only once in their lifetime, generally after 50-100 years, produce large numbers of fruits and die.
III) Many mammals, especially those living in natural, wild conditions exhibit oestrus cycle only during favourable seasons in their reproductive phase and are called continuous breeders.
IV) During the reproductive phase, there are concomitant changes in the body like slowing of metabolism.

1. I and II are correct
2. II and IV are correct
3. I, III and IV are correct
4. III and IV are correct

Q.

Which is related to reproductive isolation?

1. Behavioral isolation

2. Genetic isolation

3. Temporal isolation

4. All of the above

Q. In which of the given plants, both autogamy as well as geitonogamy are prevented?

दिए गए किन पादपों में स्वयुग्मन व सजातपुष्पी परागण दोनों नहीं होते हैं?

A. Castor

अरंडी

B. Vallisneria

वैलिसनेरिया

C. Maize

मक्का

D. Papaya

पपीता

1. Both A and B
   
   A तथा B दोनों
2. Both B and C
   
   B तथा C दोनों
3. Both A and C
   
   A तथा C दोनों
4. Both B and D
   
   B तथा D दोनों

Q.

What Is speciation?

Q. In mammals that are seasonal breeders, females are receptive only once a year. This is called

1. Follicular cycle
2. oestrous cycle
3. Menstrual cycle
4. Luteal cycle

Q. Answer in 3 to 5 sentences:
Differentiate seasonal breeders from continuous breeders.

Q. Layers continue to lay eggs upto period of ___________.

1. 18-20 months
2. 12-15 months
3. 24-26 months
4. 26-30 months

Q. Given below is a hypothetical situation
In a particular grassland, giraffes with long necks and short necks were present in almost equal numbers. As a result of drought and overgrazing by herbivores, surface vegetation became highly reduced and tall trees were the only plants that remained. It was observed that after a few generations, the percentage of tall-necked giraffes in the population increased to about 90%. This is a good example ___________

1. stabilising selection
2. directional selection
3. disruptive selection
4. diversifying selection

Q. Match the following (column 1 with column 2 )
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{p. Monkey}& \text{1. Seasonal breeder}\\ \text{q. Bamboo}& \text{2. Annual plant}\\ \text{r. Sheep}& \text{3. Perennial plant}\\ \text{s. Wheat}& \text{4. Continuous breeder}\end{array}$

1. p-2, q-1, r-4, s-3
2. p-3, q-2, r-4, s-1
3. p-4, q- 3, r- 1, s-2
4. p-1, q-4, r-3, s-2

Q. When members of a population attain sexual maturity at different times preventing interbreeding, it is termed as ________ isolation

1. Seasonal
2. Mechanical
3. Habitat
4. Ethological

Q. Compared to other animals, which one has low reproductive rate?

1. Camelus dromedarius
2. Ovid sp
3. Capra hircus
4. Horse

Q. In which of the following organism, testes descends into scrotum in breeding season but in non-breeding season goes up?

1. Frog
2. Kangaroo
3. Shrew
4. Bat

Q. Sexual maturity of House Mouse is attained at the age of

1. 35 days
2. 75 days
3. 15 days
4. 45 days

Q. Given below is a hypothetical situation
In a particular grassland, giraffes with long necks and short necks were present in almost equal numbers. As a result of drought and overgrazing by herbivores, surface vegetation became highly reduced and tall trees were the only plants that remained. It was observed that after a few generations, the percentage of tall-necked giraffes in the population increased to about 90%. This is a good example ___________

1. stabilising selection
2. directional selection
3. disruptive selection
4. diversifying selection

Q. Dog is a

1. Seasonal breeder
2. Continuous breeder
3. Monoestrus
4. Polyoestrus

Q. Monoestrous animals have

1. One ovulation each month
2. One reproductive cycle in a year
3. One menses each month
4. One egg

Q. Name two animals that exhibit Oestrus cycle.