Age Pyramids

Q. In 'urn' shaped age pyramid of the population, the trend of growth is

1. expanding
2. declining
3. stable
4. first expanding and then declining

Q.

Representation of age pyramids for human population

From the picture above, identify the growth status of the population whether it is expanding, stable or declining

1. expanding

2. declining

3. none

4. stable

Q.

A population is said to be mature or stable when

1. It forms an age pyramid of urn shape

2. It forms an age pyramid of bell shape

3. It forms an age pyramid of triangle shape

4. It forms an age pyramid of irregular shape

Q.

Differentiate between Dominant and Recessive

Q. What type of human population is represented by the age pyramid?

1. Stable population
2. Expanding population
3. Vanishing population
4. Declining population

Q.

A chromosome which has centromere near the end is called

1. Metacentric

2. Sub-metacentric

3. Acrocentric

4. Telocentric

Q.

Why are hemophilia and color blindness found more in males than in females?

Q.

State whether true or false-Chromosomes other than the pair of sex chromosomes are called alleles.

Q. Conditions of a karyotype $2n+1$, $2n–1$ and $2n+2$, $2n–2$ are called:

1. Allopolyploidy
2. Monosomy
3. Aneuploidy
4. Polyploidy

Q. The age pyramid with broad base indicates

1. high percentage of old individuals
2. high percentage of young individuals
3. low percentage of young individuals
4. a stable population

Q. Cancer-causing genes are called:

Q. A population has more young individuals compared to the older individuals. What would be the status of the population after some years?

1. It will first decline and then stabilise
2. It will decline
3. It will stabilise
4. It will increase

Q. The phenomenon of closely placed genes being inherited together is

1. 
   Crossing over
2. 
   Linkage
3. 
   Qualitative inheritance
4. 
   Gene interaction

Q.

(a) Represent diagrammatically three kinds of age-pyramids for human populations.

(b) How does an age pyramid for human population at a given point of time help the policy-makers in planning for the future? [5]

Q. Which type of human population is represented by this age pyramid?

1. Declining population
2. Expanding population
3. Stable population
4. Vanishing population

Q. What type of human population is represented by the age pyramid?

1. Stable population
2. Declining population
3. Expanding population
4. Rapidly expanding population

Q.

Sex- linked genetically inherited traits

1. a. Can appear both in males and females.

2. b. are found only in males

3. c. are found only in females

4. d. result from premarital sexual intercourse.

Q.

Bell–shaped polygonal pyramid indicates

1. High percentage of young individuals

2. Moderate percentage of young individuals

3. Low percentage of old individuals

4. Low percentage of young individuals

Q.

Representation of age pyramids for human population

From the picture above, identify the growth status of the population whether it is expanding, stable or declining

1. Expanding

2. Stable

3. Declining

4. None of these

Q.

If a girl is colour blind, what is the possibility that her father is also colour blind?

Q. Given below are typical age-structure diagrams. Choose the appropriate explanation for each age structure pyramid.

1. 1.Expanding rapidly
   2.Expanding slowly
   3.Stable
   4.Declining
2. 1.Declining
   2.Stable
   3.Expanding slowly
   4.Expanding rapidly
3. 1.Stable
   2.Declining
   3.Expanding rapidly
   4.Expanding slowly
4. 1.Expanding slowly
   2.Expanding rapidly
   3.Declining
   4.Stable

Q. Age pyramid with broad base indicates

1. High percentage of young individuals
2. Low percentage of young individuals
3. High percentage of old individuals
4. Low percentage of old individuals

Q. What type of human population is represented by the following age pyramid ?

1. Expanding populaiton
2. Vanishing population
3. Stable population
4. Decline populaition

Q.

Bell–shaped polygonal pyramid indicates

1. High percentage of young individuals

2. Moderate percentage of young individuals

3. Low percentage of young individuals

4. Low percentage of old individuals

Q. What are the three stages/phages of age distribution in age pyramid?

1. Child, adult, old
2. Child, reproductive, old
3. Pre-reproductive, reproductive, post-reproductive
4. Pre-adult, adult, post-adult

Q.

In India, human population has higher number of younger age group because of

1. Long life span and low birth rate

2. Short life span and high birth rate

3. Short life span and low birth rate

4. Birth rate is equal to death rate

Q. A population has more old individuals than young individuals. After some years, the population will

1. increase
2. decrease
3. stabilise
4. show no change

Q. What is the state of a population where pre-reproductive animals occur in large numbers? It is

1. Declining
2. Fluctuating
3. Growing
4. Undeterminable

Q. The segment C-D indicates a point where

1. no new individuals are formed
2. death rate is zero
3. the rate offormation and rate of death of individuals is the same
4. the experiment stopped

Q. The type of population where pre-reproductive organisms occur in large numbers, is

1. declining
2. flactuating
3. stable
4. growing