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Questions Related to commercial applications

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

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

  1. $625$
  2. $400$
  3. $600$
  4. $250$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Using Hardy-Weinberg equilibrium: q^2 = 100/N. Given q = 0.4, then q^2 = 0.16. So, 0.16 = 100/N, which means N = 100 / 0.16 = 625.

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

Carrying capacity is

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Logistic growth model

  2. Carrying capacity model

  3. Dispersion model

  4. Habitat cap model

  5. Exponential growth model
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. J

  2. L

  3. M

  4. S
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

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

dN/dt is 

  1. Rate of births

  2. Rate of deaths

  3. Change in population size

  4. Carrying capacity
Reveal answer Fill a bubble to check yourself
C Correct answer
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'

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

In ecology, N/S represents ____________.

  1. Population density

  2. Rate of growth

  3. Rate of deaths

  4. Rate of births
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In ecological formulas, N typically represents the total population size and S represents the area or space, so N/S represents population density.

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



  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Sigmoid growth curve occurs where growth pattern is 

  1. Logistic

  2. Exponential

  3. Accretionary

  4. Geometric
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

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

  1. Intrinsic rate of natural increase

  2. Death rate

  3. Population density at time t

  4. Carrying capacity

  5. The base of natural logarithms
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

Asymptote in a logistic growth curve is obtained when:

  1. $K=N$
  2. $K>N$
  3. $K<n$< div=""></n$<>

  4. The value of r approaches zero
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In logistic growth, the asymptote (carrying capacity K) is reached when N = K (population equals carrying capacity). At this point, population growth stops because resources limit further growth. When K > N, population is still growing. Option C has garbled formatting but would represent K < N, which is impossible.