Tropical forests are being converted to farm or pasture land at an alarming rate, and one major focus is on the biodiversity and the impact to these ecosystems. What is a direct benefit to humans that helps explain why these forests need to be preserved?

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: 1427

#Unit 4. Cell Communication and Cell Signaling

 In females, all the cells in a tumor have the same inactive X chromosome. The reason for this is that:

TLS Online TPP Program

#Question id: 2363

#Unit 2. Cellular Organization

Cells lining the respiratory tract contain ______ that help keep the lungs clear of particles.

TLS Online TPP Program

#Question id: 32398

#Unit 1. Molecules and their Interaction Relevant to Biology

Nucleoside diphosphate kinase functions in association with

TLS Online TPP Program

#Question id: 407

#Unit 1. Molecules and their Interaction Relevant to Biology

The reaction A + B -> C has a DG'° of –20 kJ/mol at 25° C.  Starting under standard conditions, one can predict that: