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TLS Online TPP Program

#Question id: 4617

Which of the following is not an observation or inference on which natural selection is based?

#Unit 11. Evolution and Behavior

  1.  There is heritable variation among individuals.

  2. Poorly adapted individuals never produce offspring.

  3. Species produce more offspring than the environment can support.

  4. Only a fraction of an individual's offspring may survive.

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TLS Online TPP Program

#Question id: 23696

#Unit 13. Methods in Biology

which of the following best describes the complete sequence of steps occurring during every cycle of PCR?
1. The primers hybridize to the target DNA.
2. The mixture is heated to a high temperature to denature the double stranded target DNA.
3. Fresh DNA polymerase is added.
4. DNA polymerase extends the primers to make a copy of the target DNA.
TLS Online TPP Program

#Question id: 690

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following pairs of bonds within a peptide backbone show free rotation around both bonds?
TLS Online TPP Program

#Question id: 5531

#Unit 5. Developmental Biology

The trophoblast forms to the
TLS Online TPP Program

#Question id: 5605

#Unit 5. Developmental Biology

Double fertilization is a unique feature of flowering plants. In this process, one sperm unites with the egg to yield a zygote. The second sperm unites with the polar nuclei to initiate the formation of the
TLS Online TPP Program

#Question id: 2197

#Unit 2. Cellular Organization

 If a freshwater plant were put in sea water, its cells would: