a/r solution 9

zoology:

1. a
cervical fistula is reminiscence of those ancestors who had gill slits in pharynx

2. b

3. b
in herdmania and sacculina, larva is more advanced than adults. this decides their phylogenetic position

4. a
darwin's finches are found on galapagos islands and are good example of adaptive radiation

5. b
a realm is a large landscape(generally subcontinental) having its unique biodiversity. south asia (including india) occurs in oriental realm. king cobra is endemic here. kangaroo is found in australian realm. the imaginary line separating oriental and australian realms is called wallace line

botany:

1. b
in CNS, nucleus is a grey matter structure acting as a transit point for electrical signals in a single neural subsystem

2. d
multinucleate animal cell is syncytic and multinucleate plant cell is called coenocytic

3. a
it blocks access by transcription factors needed for gene transcription

4. c
euchromatin contains active genes

5. a
prokaryotic DNA is highly mutable because it have continuous interaction with cytoplasmic components due to absense of nuclear membrane

chemistry:

1. b
rest mass does not mean that electron is static. it rather is the mass of electron moving with a velocity which is too less as compared to velocity of light

2. d
atoms of different elements having same mass number are called isobars

3. b

4. a

5. a
when white light is passed through a chemical solution, radiations of certain wavelengths get absorbed appearing as dark lines in rather continuous spectrum, making absorbtion spectrum discontinuous

physics:

1. a

2. a

3. d
maximum height is u^2/2g at time u/g

4. a
polar vectors are those which have a starting point(displacement) or a point of application(force)

5. a

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