#Question id: 11961
#Unit 7. System Physiology – Animal
#Question id: 4651
#Unit 11. Evolution and Behavior
Some members of a photosynthetic plant species are genetically resistant to an herbicide, while other members of the same species are not resistant to the herbicide. Which combination of events should cause the most effective replacement of the non-herbicide-resistant strain of plants by the resistant strain?
1. The presence of the herbicide in the environment
2. The absence of the herbicide from the environment
3. The maintenance of the proper conditions for one generation
4. The maintenance of the proper conditions for many generations
#Question id: 5708
#Unit 8. Inheritance Biology
If non-disjunction occurs in meiosis I, which of the following scenario is most likely to occur?
#Question id: 14760
#Unit 2. Cellular Organization
#Question id: 800
#Unit 1. Molecules and their Interaction Relevant to Biology
Following table lists the two major forms of DNA duplexes, conformation of base attached to the sugar and the nature of major and minor grooves.
DNA duplex |
Properties |
(A) A
form |
(i) Syn
conformation of the base to sugar |
(B) B
form |
(ii) Anti
conformation of the base to sugar |
|
(iii) Wide
major groove |
|
(iv)
Narrow major groove |
|
(v) Wide
minor groove |
|
(vi) Narrow
minor groove |
|
(vii) C-3’
endo sugar puckering |
|
(viii) C-2’
endo sugar puckering |