GEOLOGIC TIME SCALE: PART 2

What type of bacteria that have existed during the Precambrian Era?

• Thermophiles

• Cryophiles

• Basophiles

• Extremophiles

These are types of bacteria that doesn't need oxygen.

• anaerobic

• aerobic

• acrobatic

• none of the choices

Coronacollina acula are the ancient ancestors of...

• corals

• sponges

• starfish

• mollusks

What is the most prominent feature of Choanoflagellate?

• cilium

• pseudopod

• flagellum

• all of the above

In what kingdom do Choanoflagellates belong?

• monera

• protista

• plantae

• animalia

Spriggina are segmented...

• sponges

• bacteria

• leaves

• worms

What made the Hadean Earth cool down?

• Evaporation

• Condensation

• Transpiration

• Precipitation

What is the Supercontinent during Precambrian Period?

• Gondwana

• Pangaea

• Rhodena

• None of the above

What made Precambrian organisms to become extinct?

• Eventually, oxygen became abundant in the atmosphere.

• Carbon dioxide made most of the organisms suffocated.

• It happened due to large amount of methane accumulation.

• Nitrous oxide became poisonous.

Charnia are considered as a marine animal. It feeds on marine nutrients using its mouth.

• TRUE

• FALSE