Migration

Q.

___ can be the name for people moving out of a population.

1. immigration

2. emigration

3. evolution

4. invention

Q.

Migratory birds fly to faraway areas during a particular time of the year. Which of the following conditions present in their habitat during that time are responsible for this behavior?

1. Unavailability of food
2. Extreme weather conditions
3. Overcrowding
4. Lack of nesting areas.

1. ii & iii

2. i & ii

3. i & iv

4. ii & iv

Q. Question 10
Migratory birds fly to far away areas during a particular time of the year. Which of the following conditions present in their habitat during that time are responsible for this behaviour?

(i) Unavailability of food
(ii) Extreme weather conditions
(iii) Over crowding
(iv) Lack of nesting areas

(a) ii & iii
(b) i & ii
(c) i & iv
(d) ii & iv

Q.

Birds that travel long distances to overcome harsh conditions are known as _______.

1. endangered birds

2. travelling birds

3. flying birds

4. migratory birds

Q. Migratory birds are multinational resources. Explain.

Q. Explain with the help of suitable examples, the three different ways by which organisms overcome their stressful conditions lasting for short duration.

Q. The bird that hibernates in winter is

1. Poorwill
2. Arctic Tern (Sterna)
3. Albatross
4. None of the above

Q. In what way does change in weather condition affect the migration of birds?

Q. Arctic tern migrates southward during

1. Spring
2. Summer
3. Winter
4. Autumn

Q. __________ is an inactive phase that some organisms undergo during the winter to escape from the harsh conditions.

1. Adaptation
2. Aestivation
3. Acclimatisation
4. Hibernation

Q. Birds of northern cold areas migrate southwards as the days

1. Begin to shorten
2. Begin to lengthen
3. Become neutral
4. None of the above

Q. Breeding ground of Arctic tern are in

1. Himalayas
2. Siberia
3. Antarctica
4. North atlantic and arctic regions

Q.

Migration and hibernation are most common in which two biomes?

1. Deciduous forest and arctic tundra
2. Tropical rain forest and arctic tundra
3. Arctic tundra and desert
4. Deciduous forest and desert

Q. A seasonal migratory animal is

1. Eel
2. Locust
3. Caribou
4. Aphid