Natural selection was Darwin’s brilliant hypothesis, that accounts for adaptations, features that appear “designed” to fit organisms to their environment.

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#Id: 9899

#Unit 4. Cell Communication and Cell Signaling

The three known RLRs (RIG-I, MDA5, and LGP2) are CARD-containing RNA helicases that recognize viral RNAs, usually from RNA viruses such as influenza, measles, and West Nile.

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#Id: 5632

#Unit 7. System Physiology – Animal

Each rod and cone photoreceptor is divided into:

an outer segment

an inner segment 

a synaptic terminal zone

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#Id: 3089

#Unit 3. Fundamental Processes

FtsZ is a GTPase that forms a ring on the inside of the bacterial envelope. It is connected to other cytoskeletal components.

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#Id: 10365

#Unit 4. Cell Communication and Cell Signaling

Antigen pieces are held within the binding groove of a cell surface protein called the major histocompatibility complex (MHC) molecule which recognized by T cell

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#Id: 9161

#Unit 11. Evolution and Behavior

Close inbreeding is harmful because it increases the proportion of homozygotes and thereby boosts the probability that deleterious and lethal recessive alleles.