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: 10960

#Unit 7. System Physiology – Animal

Why do some malnourished patients bleed excessively when injured?

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#Question id: 24137

#General Aptitude

SONG : VERSE

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#Question id: 23248

#Unit 13. Methods in Biology

Pyrosequencing is sequencing by synthesis whereby a PCR template is hybridised to an oligonucleotide and incubated with 

1. DNA polymerase

2.  ATP sulphurylase

3. Luciferase 

4. Apyrase

Which of the following option has correct combination?

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#Question id: 11962

#Unit 7. System Physiology – Animal

 In the digestive system, peristalsis is ________.

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#Question id: 11743

#Unit 6. System Physiology – Plant

The wall between the two mature sieve tube elements contain a sieve plates, these sieve plate pores are open —that is, unobstructed by