Tag: commercial applications

Questions Related to commercial applications

In a population $100$ individual are with recessive phenetype,with allelic frequency of $0.4$, the total population sis 

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. $625$

  2. $400$

  3. $600$

  4. $250$

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Correct Option: A

Carrying capacity is

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. The capacity of an individual to produce young ones.

  2. Availability of resources in a given habitat to support a certain number of individuals of population, beyond which no further growth is possible.

  3. Gene frequency from one generation to next.

  4. Gene frequency in same generation.

Show answer
Correct Option: B
Explanation:

The carrying capacity of an organism is the maximum population size of the species that the environment can sustain indefinitely beyond which there is no further growth. When the population reaches the carrying capacity then mortality becomes greater than natality.

Therefore, the correct answer is option B.

A pattern of idealized population growth, restricted by limiting factors is shown by

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. Logistic growth model

  2. Carrying capacity model

  3. Dispersion model

  4. Habitat cap model

  5. Exponential growth model

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Correct Option: A
Explanation:

Population growth rate measures the number of individuals in a population (N) over time (t). When the conditions are ideal, the type of growth is known as exponential form of growth which is expressed by the equation, (dN)/(dt)= rN. When the limiting factors is restricted, the growth pattern is known as logistic growth model. This model is described by the differential equation (dN)/(dt)= rN(K-N)/K, where K is the carrying capacity and r is the maximum per capita growth. 

Therefore, the correct answer is option A.

A logistic growth curve depicting a population that is limited
by a definite carrying capacity is shaped like the letter

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. J

  2. L

  3. M

  4. S

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Correct Option: D
Explanation:

A logistic growth curve that is limited by a definite carrying capacity is shaped like the letter 'S' or a sigmoid curve, which is differentiated into three parts the Lag phase, the Log phase or the exponential growth phase and the stationary or plateau phase. At this phase the amount of resources cannot support the growing population, due to which the number of members in the population is prevented from increasing

So, the correct answer is 'S'

dN/dt is 

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. Rate of births

  2. Rate of deaths

  3. Change in population size

  4. Carrying capacity

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Correct Option: C
Explanation:

The rate of change in a population can be defined as the ratio of total change in population and time taken for that change. Change in population size can be defined as difference in population size at the end and between the beginning of a particular time period

So, the correct answer is 'Change in population size'

In ecology, N/S represents ____________.

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. Population density

  2. Rate of growth

  3. Rate of deaths

  4. Rate of births

Show answer
Correct Option: A
   Column I    Column II
 a  Pacific Salmon fish  p   Verhulst Pearl logistic growth
 b  $N _t = N _0e^{rt}$  q  Breads only once in life time
 c  Oyster  r  Exponentoal growth
 d  $dN /dt=rN$$\left(\dfrac{K-N}{K}\right)$  s  Large number of small sozed o

Match the columns and find the correct options 



commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. a - s , b - r , c - p , d - q

  2. a - r , b - s , c - p , d - q

  3. a - r , b - p , c - s, d - q

  4. a - q , b - r , c - s , d - p

  5. a - q , b - s , c - r , d - p

Show answer
Correct Option: D
Explanation:

a) Pacific salmon Fish of the genus Oncorhynchus is an individual that reproduces only once in its lifetime. 

b) Exponential growth is the rate of change at an unit time. It is denoted by $N _t$ = $N _0$ e^rt
c) Oyster reproduction produces a large number of small sized offsprings.
d) $ dN/dt = rN ((K-N)/K)$ is the formula for verhulst pearl logistic growth.

Sigmoid growth curve occurs where growth pattern is 

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. Logistic

  2. Exponential

  3. Accretionary

  4. Geometric

Show answer
Correct Option: A
Explanation:
Logistic growth model:- Sigmoid growth curve occurs where growth pattern is logistic. Unconstrained natural growth is exponential growth. A biological population with food, space to grow, and no threat from predators, tends to grow at rate proportional to population.
$\dfrac{dP}{dt}=rp$
where p$=$population function of time t
r$=$ proportionality constant.

In the equation , $\dfrac{dN}{dt}=rN(\dfrac{K-N}{K})$ , r stands for 

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. Intrinsic rate of natural increase

  2. Death rate

  3. Population density at time t

  4. Carrying capacity

  5. The base of natural logarithms

Show answer
Correct Option: A
Explanation:
The population growth rate is measured in number of individuals in a population (N) over time (t). The term for population growth rate is written as (dN/dt). The d just means change. K represents the carrying capacity, and r is the maximum per capita growth rate for a population. Per capita means per individual, and the per capita growth rate involves the number of births and deaths in a population. The logistic growth equation assumes that K and r do not change over time in a population.

So, the correct answer is 'A'.

Asymptote in a logistic growth curve is obtained when:

commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

  1. $K=N$

  2. $K>N$

  3. $K

  4. The value of r approaches zero

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Correct Option: A