Migration

Q.

Define 10 percent law?

Q. Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?

Q. Below is the graphical representation of response of organisms against temperature. Find out the correct match.

1. A-plants, B-birds
2. A-birds, B-mammals
3. C-mammals, B-plants
4. A-birds, B-plants

Q. Give a suitable example for commensalism.

Q. Maximum species diversity is seen in latitudinal range of

1. ${23.5}^{\circ }Sto{66.5}^{\circ }N$
2. ${23.5}^{\circ }Nto{66.5}^{\circ }N$
3. ${23.5}^{\circ }Nto{23.5}^{\circ }S$
4. ${66.5}^{\circ }Nto{90}^{\circ }N$

Q.

Is migration a gene flow?

Q.

Rapid decline in the population due to high mortality rate is called

1. Population density

2. Population crash

3. All of the these

4. Population explosion

Q. If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to the tertiary consumer?​ ​

1. 10 J
2. 0.15 J
3. 1.5 J
4. 15 J

Q. Match column I with column II and find out the correct option.

Column 1	Column 2
A) Regulate	i) Thick walled spores of bacteria
B) Conform	ii) Birds and mammals
C) Migrate	iii) Plants
D) Suspend	iv) Siberian crane

1. A - ii, B - iii, C - iv, D - i
2. A - i, B - ii, C - iii, D - iv
3. A - iv, B - i, C - ii, D - iii
4. A - iv, B - iii, C - ii, D - i

Q. Whatever might be the ultimate reasons, the density of a population in a given habitat during a given period, fluctuates due to changes in

1. four basic processes—birth rate, death rate, sex ratio and age distribution
2. two basic processes—immigration and emigration
3. four basic processes—natality, mortality, immigration and emigration
4. two basic processes—natality and mortality

Q.

Presence of different types of beaks in finches of Galapagos Islands adapted to different feeding habit provides evidence for

1. Natural selection
2. Intraspecific variations
3. Interspecific competition
4. Intraspecific competition

Q.

How does gene flow counteract natural selection?

Q. Define incineration

Q. Which of the following is true regarding migration in animals?

1. All animals migrate from one part of the world to another.
2. Migration happens only among fishes and birds.
3. Organisms that cannot conform or regulate may tend to migrate to escape stressful conditions.
4. All of these.

Q. Hibernation occurring in certain animals is

1. Occasional
2. Periodic
3. Intermittent
4. Rhythmic

Q.

Why is adaptation necessary? what happens to those animals who do not adapt to the environment?

Q. Neetu studied in her class that according to 2018 census human population is approximately 7.58 billion This is a huge population to feed and the size is rapidly increasing. A major section of population is not properly fed. Which of them could be the possible problems associated with the population explosion?
A. Famine
B. Increased standard of living
C. Poverty
D. No effect on environment

1. A, B and D
2. A and B
3. C and D
4. A and C

Q. The Siberian crane from Russia is a regular visitor to the bird sanctuary in which place in India?

1. Lallbagh, Bangalore
2. Vedanthgol sanctuary, Tamil Nadu
3. Ranganathathittis sanctuary, Karnataka
4. Bharatpur sanctuary, Rajasthan

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

Q. David Tilmans’s long–term ecosystem experiments using outdoor plots showed that -

1. Increased diversity contributed to higher productivity
2. Increased diversity contributed to lower productivity
3. Increased diversity have no impact on productivity
4. Increased diversity have unpredictable impact on productivity

Q. What are the major questions that we are concerned about the population?

Q. What is the reason that a food chain consists of only 3-5 steps ?

Q. Give four adaptations found in animals of arid region.

Q. What do you understand by adaptations in organism and why do they adapt?

Q. Differentiate between regulators and conformers.

Q.

The animals which spend a part of their life in fresh water as well as in sea water are called.

1. Diadromous

2. Stenohaline

3. Euryhaline

4. Potamodromous

Q. Every year, the Arctic tern flies from the Arctic breeding grounds to the winter grounds of Antarctica and back. This behavioural pattern is known as.

1. hibernation
2. aestivation
3. migration
4. diapause

Q. Write a short note on 'migratory birds'.

Q.

What is assisted gene flow?

Q. Different animals responds to changes in their surroundings in different ways. Taking one example each, explain "some animals undergo aestivation while some others hibernation". How do fungi respond to adverse climatic conditions?