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TLS Online TPP Program

#Question id: 9602

The legless condition that is observed in several groups of extant reptiles is the result of 

#Unit 9. Diversity of Life Forms
  1. their common ancestor having been legless.
  2. a shared adaptation to an arboreal (living in trees) lifestyle.
  3. several instances of the legless condition arising independently of each other.
  4. individual lizards adapting to a fossorial (living in burrows) lifestyle during their lifetimes.
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TLS Online TPP Program

#Question id: 15774

#Unit 5. Developmental Biology

When the inner cells are removed from the mammalian embryo and cultured in vitro, they establish a population of pluripotent cells, which is
TLS Online TPP Program

#Question id: 3488

#Unit 11. Evolution and Behavior

According to Hamiltonʹs rule,
TLS Online TPP Program

#Question id: 1530

#Unit 4. Cell Communication and Cell Signaling

What are the differences and similarities between the transforming genes of retroviruses and those of DNA tumor viruses?
TLS Online TPP Program

#Question id: 11416

#Unit 10. Ecological Principles

Which of the following biomes spans the largest annual mean temperature range, but the narrowest mean precipitation range?
TLS Online TPP Program

#Question id: 1108

#Unit 4. Cell Communication and Cell Signaling

Which of the following amino acids are most frequently phosphorylated by protein kinases in the cytoplasm during signal transduction?