Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?

1. Protostomes invade terrestrial environments.

2. Cambrian explosion occurs.

3. Deuterostomes invade terrestrial environments.

4. Vertebrates become top predators in the seas.

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#Question id: 18840

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

which of the following act as chain terminator in sanger method 

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#Question id: 1567

#Section 2: General Biology

Which of the following cell types are responsible for initiating a secondary immune response?

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#Question id: 15899

#Section 6: Plant, Animal and Microbial Biotechnology

Somatic embryos (SEs) regenerate from the tissues of other SEs or the parts of germinating SEs; such SEs are called

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#Question id: 27601

#Section 5: Bioprocess Engineering and Process Biotechnology

In a distillation column for a feed of 1000 kg the output is 80% of the feed and remaining 20% is waste. The feed contains 20% of Acetone and rest Water. The product contains 20% of Acetone and 40% of Water. How much Acetone is there in waste?

TLS Online TPP Program

#Question id: 3041

#Section 2: General Biology

Which statement about gram-negative bacteria is correct?