TLS Online TPP Program

#Question id: 14961


Drosophila females are capable of storing sperm and using it to fertilize eggs long after mating. How might this present a problem for a geneticist?

#Unit 8. Inheritance Biology
  1. IN ORDER TO DESIGN A SPECIFIC CROSS, FEMALES MUST BE PREVENTED FROM MATING WITH ANY OTHER STRAIN OF MALES.
  2. This allows Drosophila females to "select" sperm from the stronger male.
  3. Individual offspring from these females may have more than one father.
  4. This should not present a problem for a geneticist; it is merely a reproductive advantage to the fly if the population size is low.

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TLS Online TPP Program

#Question id: 10717

#Unit 10. Ecological Principles

Following represents four different regions, each with four different sites on different-sized mountains. Which of the following statement is correct? 


a) In region ‘a’ gamma diversity (γ) is one, and alpha diversity (α) diversity is also 1

b) In region ‘b’ gamma diversity (γ) is 4, and alpha diversity (α) diversity is 1

c) In region ‘c’ gamma diversity (γ) is six, and beta diversity (β) diversity is 2

d) The gamma diversity (γ) are same in region ‘c’ and‘d’.

TLS Online TPP Program

#Question id: 10718

#Unit 10. Ecological Principles

A researcher collects data on plant species composition in two habitats (P and Q) by using 10 quadrats each in both habitats. She calculates the average a-diversity and the 13-diversity of each habitat from this data (shown below). Which of the following can be inferred about these habitats? 

A) Q has greater total diversity (γ) and more heterogeneous than P

B) Q has lower total diversity (γ) and less heterogeneous than P

C) P has lower total diversity (γ) and more heterogeneous than Q

D) P has greater total diversity (γ) and more heterogeneous than Q

TLS Online TPP Program

#Question id: 10719

#Unit 10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services, Following statement are given
A) Community services decline with decreased species richness in a stepwise fashion.
B) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions
C) Species richness declines even slightly from its natural levels, community services are reduced immediately
D) Community services change as the number of species increases or decreases, but that the direction of change is not predictable.

TLS Online TPP Program

#Question id: 10720

#Unit 10. Ecological Principles

What is the Jaccard index between the two communities?


TLS Online TPP Program

#Question id: 10721

#Unit 10. Ecological Principles

Which above spp having decrease order of abundance?


TLS Online TPP Program

#Question id: 10722

#Unit 10. Ecological Principles

Community 1 contains 100 individuals distributed among four species (A, B, C, and D). Community 2 contains 100 individuals distributed among three species (A, B, and C). Community 1: 5A, 5B, 85C, 5D Community 2: 30A, 40B, 30C Calculate the Shannon diversity (H) for each community.