The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that

 A) tropical communities are older.

 B) tropical regions generally have more available water and higher levels of solar radiation.

 C) higher temperatures cause more rapid speciation.

 D) diversity increases as evapotranspiration decreases.

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#Question id: 5023

#Unit 11. Evolution and Behavior

The origin of the craniates occurred at roughly the same time as the

TLS Online TPP Program

#Question id: 31313

#Unit 6. System Physiology – Plant

P680, pheophytin and plastoquinone are held together a group of proteins

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#Question id: 8707

#Unit 9. Diversity of Life Forms

Use the figure to answer the following question

The phylogenetic tree shown ________.

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#Question id: 633

#Unit 1. Molecules and their Interaction Relevant to Biology

An amino acid transporter protein is responsible for the transport of a specific amino acid across a membrane. The KI values of several competitive inhibitors of the amino acid transporter are shown above. Based on these data, which of the following is most likely the amino acid transported by this protein?

TLS Online TPP Program

#Question id: 4689

#Unit 3. Fundamental Processes

Cleavage liberates precursors of rRNAs and tRNA Cleavage at the points that is carried out by the enzymes excepts