Dam (Dam-) mutants accumulates hemimethylated products after replication.

If the plasmid is methylated, it undergoes a single round of replication, and then the hemimethylated products accumulate.

Suggesting that a hemimethylated origin cannot be used to initiate a replication cycle.

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#Id: 4843

#Unit 13. Methods in Biology

Again, H0, the null hypothesis, consists of the statement that, “There is no bear”, wherein, if a wolf is indeed present, is a type II error on the part of the investigator.

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#Id: 7055

#Unit 11. Evolution and Behavior

Dollo’s law:  A biological generalization positing that complex characters, once lost in evolution, are extremely unlikely to reappear and thus the loss of complex characters is virtually always irreversible.

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#Id: 3318

#Unit 6. System Physiology – Plant

Electrochemical energy inherent in this difference in proton concentration and separation of charge represents a temporary conservation of much of the energy of electron transfer.

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#Id: 1175

#Unit 7. System Physiology – Animal

Cones 

• Higher visual acuity

• responsible for vision in bright light (photopic vision) Participate in color vision

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#Id: 10364

#Unit 4. Cell Communication and Cell Signaling

Properties of thymus-dependent and thymus-independent antigens