Match the lac genes with their enzymes & functions;

lac genes	Enzyme	Functions
lacZ	b-galactosidase	which rids the cell of toxic thiogalactosides that also get transported in by lacY.
lacY	thiogalactoside transacetylase	which cleaves the sugar lactose into galactose and glucose, both of which are used by the cell as energy sources
lacA	lactose permease	a protein that inserts into the cell membrane and transports lactose into the cell

TLS Online TPP Program

#Question id: 12572

#Unit 10. Ecological Principles

Use what you know about ecosystem stability and the information provided in the graph below to answer the following question.

Which community (a-e) would likely be the most biodiverse?

TLS Online TPP Program

#Question id: 12573

#Unit 10. Ecological Principles

Which of the following conditions is the most likely indicator of a population in an extinction vortex? 

TLS Online TPP Program

#Question id: 12574

#Unit 10. Ecological Principles

According to the small- population approach, what would be the best strategy for saving a population that is in an extinction vortex?

TLS Online TPP Program

#Question id: 12575

#Unit 10. Ecological Principles

All of the following are adaptations that permit the camel to be active by day in the desert EXCEPT 

TLS Online TPP Program

#Question id: 12576

#Unit 10. Ecological Principles

Estimates of current rates of extinction

TLS Online TPP Program

#Question id: 12577

#Unit 10. Ecological Principles

During  a  field  trip,  an  instructor  touched  a  moth  resting  on  a  tree  trunk.  The  moth  raised  its  forewings  to  reveal large eyespots on its hind wings. The instructor asked why the moth lifted its wings. One student answered that sensory  receptors  had  fired  and  triggered  a  neuronal  reflex  culminating  in  the  contraction  of  certain  muscles.  A second student responded that the behaviour might frighten predators. Which statement best describes these explanations?