Practice Questions

TLS Online TPP Program

#Question id: 1370

H. V. Wilson worked with sponges to gain some insight into exactly what was responsible for holding adjacent cells together. He exposed two species of differently pigmented sponges to a chemical that disrupted intercellular junctions, and the cells of the sponges dissociated. Wilson then mixed the cells of the two species and removed the chemical that caused the cells to dissociate. Wilson found that the sponges reassembled into two separate species. The cells from one species did not interact or form associations with the cells of the other species.

How do you explain the results of Wilson's experiments?

#Unit 4. Cell Communication and Cell Signaling

The two species of sponge had different enzymes that functioned in the reassembly process.
The molecules responsible for cell-cell adhesion (cell junctions) were irreversibly destroyed during the experiment.
The molecules responsible for cell-cell adhesion (cell junctions) differed between the two species of sponge.
One cell functioned as an organizer for each organism, thereby attracting only cells of the same species.

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TLS Online TPP Program

#Question id: 24574

#Unit 10. Ecological Principles

If number of birds in the population N0= 100 next year ecologists count 110 birds in the same population, consider a population of birds growing at a rate of 5% per year. After 5 years how many birds would there be?

TLS Online TPP Program

#Question id: 24573

#Unit 10. Ecological Principles

Calculate the finite rate of increase, if ecologists count the number of birds in the population, N0= 100, the next year ecologists count 110 birds in the same population,

TLS Online TPP Program

#Question id: 24572

#Unit 10. Ecological Principles

Find out the characteristics of geometric growth?

a. It can grow for both periodic and continuous breeders

b. depends on the activity of net reproductive growth rate

c. unlimited Population Growth Leads to J-shaped

d. unlimited Population Growth Leads to S-shaped

e. resources are not limited

TLS Online TPP Program

#Question id: 24571

#Unit 10. Ecological Principles

In which case the population eventually decline to extinction?

TLS Online TPP Program

#Question id: 24570

#Unit 10. Ecological Principles

Geometric growth describes the population growth where is the N0= 100 is the number of females currently in the population, what is the population size after the five generation if R0= 1.4 ?

TLS Online TPP Program

#Question id: 24569

#Unit 10. Ecological Principles

Geometric and the exponential growth both are describe by

a. similar mathematical models

b. slightly different mathematical models

c. similar J-shaped growth curve

d. similar S-shaped growth curve