University:
The University Of Western Ontario
Course:
Biology 2290F | Scientific Method in Biology
Academic year:

2022
Views:

329

Pages:

3
Author:

Kyuwon J.

Viruses ● Not alive ○ Cannot reproduce ○ No energy metabolism is done ○ Stimuli = no response ● Obligate parasite ● Few theories in how it originated ○ Virus first ■ Before cells ○ Reduction ■ From cells ○ Escape ■ Parts of cell escaped and became independent organs ● HIV ○ Zoonotic disease ■ Spillover in sub-saharan Africa ■ From primates to humans ■ SIV 1. 2. 3. 4. Virons enters cells Reverse transcription is done. It will make RNA to DNA Integrase splices viral DNA into host DNA Normal transcription + translation happens 5. New virons could burst out or could be stored later and the cycle continues Drug treatment ● Can harm host ● Viral resistance may happens ○ Random occurrence ○ Resistant trait will survive in first dose ○ Resistant trait becomes the majority ● Drug cocktails ○ May overcome mutations ○ Drugs may kill both orange and blue traits ■ Population does not grow again Theory of Evolution + natural selection ● Descent with modification from common ancestor ● Change in allele frequency ○ Between different generation ● Variational = cannot transform ● Gradual ● Homologous ○ Similarity between common ancestors ● Natural selections ○ Heritable variation is passed on ■ Selectively ■ Change in genotypes of population Falsifiable ● Never prove a idea but can support the idea ● Idea is scientific when other can be proven wrong ● Flaimble ○ Not specific ○ Subjective ○ Cannot be measured ● ex) ○ Pacific salmon cannot reproduce more than once in their lifetime ■ Falsifiable ○ Passenger pigeons never really went extinct. They are just rare ■ Not Falsifiable ■ Cannot prove this statement is wrong