Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

Multiple choice zoology human population population ecology population size population and how it changes

Which of the following statements is correct?

  1. The number of organisms can decrease but never increase once a population reaches its carrying capacity

  2. All populations experience exponential growth once they reach carrying capacity

  3. A population always grows rapidly once it reaches its carrying capacity

  4. Limiting factors can influence the number of organisms in a population once it reaches its carrying capacity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Answer : 
i) Carrying Capacity-when the number of births equals the number of deaths, the population is at its carrying capacity for that habitat. 
ii) If resources are being used faster than they are being replenished, then the species has firstly exceeded its carrying capacity. 
iii) If this occurs, later the population will then decrease in size due to intraspecific competition for resources.

So the correct answer is option D. Limiting factors can influence the number of organisms in a population once it reaches its carrying capacity.
Multiple choice zoology human population population ecology population size population and how it changes

Which of the following statements defines the density of population?

  1. Number of persons living per unit area

  2. Number of persons living in a country

  3. Change in the number of inhabitants of a country during a specific period of time

  4. Absolute numbers added every year
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A population is a unit of biotic community made up of near permanent group of an interbreeding individual of a species found in a space or geographical area at a particular time. It is called local population or deme. Increasing population is a challenging issue for the developing country like India. If the population increases more than its carrying capacity it may lead to food crisis resulting in famines, hunger and poor health, acute shortage of shelter and clothing. Spreading awareness among the people about the ill-effects of increasing population may be helpful to control the over increasing population. So, the correct answer is option D.

Multiple choice zoology human population population ecology population size population and how it changes

Name the union territory having the highest density of population?

  1. Chandigarh

  2. Delhi

  3. Puducherry (Pondicherry)

  4. Daman and Diu
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Increasing population is a challenging issue for the developing country like India. If the population increases more than its carrying capacity it may lead to food crisis resulting in famines, hunger and poor health, acute shortage of shelter and clothing. Spreading awareness among the people about the ill-effects of increasing population may be helpful to control the over increasing population. 

India is the second largest population country in the world. In India Uttar Pradesh, is the most populated state. Delhi is the highest populated union territory of India.
So, the correct answer is option B.

Multiple choice zoology human population population ecology population size population and how it changes

Countries that have higher population density than India are

  1. China

  2. U. S. A

  3. Britain

  4. Bangladesh
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Population density is defined as the number of people per unit area. Bangladesh is a small country with the smaller land area and more population. Therefore the population density is more. The population density of Bangladesh is 1266 per kilometre square. 

Thus, the correct answer is option D.

Multiple choice zoology human population population ecology population size population and how it changes

Population density is 

  1. $\displaystyle{\frac{No. of individuals}{No. of houses}}$
  2. $\displaystyle{\frac{No. of births}{No. of individuals}}$
  3. $\displaystyle{\frac{No. of births}{Space}}$
  4. $\displaystyle{\frac{No. of births}{Total area covered}}$
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Population density is a measurement of population per unit area or unit volume. Formulas of population density is total population divided by total area. It can also be represented by number of births/no. of individuals and number of births/space.

Therefore, the correct answer is option B and C.

Multiple choice zoology human population population ecology population size population and how it changes

Even, clumped or random represents which property of the population?

  1. Habitat

  2. Dispersion

  3. Size

  4. Density

  5. Growth rate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The demographic study is based on the estimation of the several factors related to a population. Dispersion plays an important role in determining the in demographic studies and indicates the distribution of species in a particular area. Individuals of a population can be distributed in one of three basic patterns, they can be more or less equally spaced apart (uniform dispersion), dispersed randomly with no predictable pattern (random dispersion), or clustered in groups (clumped dispersion).
So, the correct answer is option B.
Multiple choice zoology human population population ecology population size population and how it changes

The number of people that can be supported by the environmental resources without the degradation of environment is known as

  1. Carrying capacity

  2. Population density

  3. Limiting factor
  4. $K$-selection
  5. $r$-selection
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When the necessary conditions for sustaining life are adequately available, like the food, habitat, water, the maximum number of members of a species that the environment can sustain indefinitely can be called as the carrying capacity of the environment. Thus, the correct answer is option A.

Multiple choice zoology human population population ecology population size population and how it changes

A herd of cattle was moved by a rancher to a different pasture. The carrying capacity of that pasteur exceeded is known by the fact that

  1. The herd increased in size

  2. The pasture became overgrazed and barren

  3. The pasture had more grasses

  4. The cows gained weight

  5. The cows had more calves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carrying capacity is the maximum size of the population of a species that a certain environment can support for an extended period of time. Overgrazing of pasture would make it barren. Once population overshoots the carrying capacity, it starts decreasing as at this point. An overgrazed pasture would no longer support the cattle leading them to starve or look for another food source. Thus, the correct answer is B.

Multiple choice zoology human population population ecology population size population and how it changes

The population size that an environment can sustain is called the 

  1. Maximum population

  2. Habitat

  3. Exponential limit

  4. Logistic goal

  5. Carrying capacity
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The carrying capacity of an environment is the maximum population it can support with available resources. Carrying capacity is one of the limiting factors for population increase.

So, the correct answer is 'Carrying capacity'