First invertebrates insects fossil appeared in which of the following geological ages?

a) Mesozoic b) Jurassic

c) Paleozoic d) Devonian

e) Permian f) Pennsylvanian

Which of the following combinations give the best answer?

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#Question id: 356

#I Life Science/ Life Sciences Group – I-V

How does 0.5 M sucrose (molecular mass 342) solution compare to 0.5 M glucose (molecular mass 180) solution?

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#Question id: 79

#SCPH06 I Botany

The structure of D-arabinose is shown below. How many stereoisomers are possible for this molecule?

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#Question id: 3849

#SCPH06 I Botany

Which of the following is short 20 to 22-nucleotide single-stranded RNAs that block the expression of complementary or partially complementary mRNAs.

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#Question id: 5260

#SCPH06 I Botany

Regarding prokaryotic reproduction, which statement is correct?

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#Question id: 9186

#SCPH28 | Zoology

A pathogenic fungus invades a plant. What does the infected plant produce in response to the attack?