According to current theories about the origin of life

Reference no: EM13532293

1. According to current theories about the origin of life, which oneof the following must have preceded all the others?

eukaryotic organisms.
oxygen in theatmosphere.
photosynthesis.
plants.

2. If the first organisms on Earth were heterotrophs they wouldhave

eatenautotrophs.
required organicmolecules in their environment.
carried onphotosynthesis.
used RNA as their geneticmaterial.

3. Algae are in the kingdom

Plantae.
Mycetae.
Protista.
Animalia.

4. An examination of the fossil record of life on Earth reveals that

extinctions rarelyaffected more than 10-20% of existing species.
terrestrial organismswere less likely to go extinct than marine organisms.
it usually took 100s ofmillions of years for new organisms to appear.
None of the above istrue.

5. Viruses differ from Eubacteria in that viruses

have a nucleus andEubacteria lack a nucleus
lack genetic material.
are larger thanEubacteria.
can only reproduce insideanother cell

6. effect of water temperature on a fish in a stream wouldbe classified as a (an)

bioticfactor.
abioticfactor.
niche.
None of theabove.

Reference no: EM13532293

Questions Cloud

Geneticconstitution might take some of the magic from dating : Do you think that when our children or grandchildren first begin todate in the future, they may first compare their geneticconstitution cards to see if there are any bad gene match-ups?Then, they can know right away whether they should begin to getse..

Difference between cniderians and ctenophores : Which of the following is an important difference between Cniderians and Ctenophores? Corals are able to survive in nutrient-poor tropicalwaters by forming symbiotic relationships with photosynthetic:

Structures in the prokaryotic cell : Which of the structures in the prokaryotic cell can be seen withlight microscopy? Which of the structures in the eukaryotic cellcan be seen with light microscopy?

Sequence of RNA after transcriptionoccurs : Gene X has the DNA base sequence: 3' TACCCTTTAGTAGCCACT 5' What would be the base sequence of RNA after transcriptionoccurs?

According to current theories about the origin of life : effect of water temperature on a fish in a stream wouldbe classified as a (an). An examination of the fossil record of life on Earth reveals that. If the first organisms on Earth were heterotrophs they wouldhave, According to current theories about t..

Different forms of the same gene are referred : There are three different forms of RNA. Which is not one ofthese? Cattle that feed on grass occupy which trophic level? Different forms of the same gene are referred to as

Catabolic and anabolic modes : Many biochemcial pathways operate in both catabolic and anabolic modes. Describe the benefits and costs (in other words, the good and the bad) for bacteria that operate these amphibolic pathways.

Determine the resultant of the four force sand its line of : Four forces act on a small airplane in flight: its weight (24kN), the thrust provided by the engine (10 kN), the lift providedby the wings (23 kN), and the drag resulting from its motionthrough the air (3 kN).

What is the elevation of point q : The slope distance and zenith angle measured from point P to pointQ were 1876.253m and 87.33'24 degrees, respectively. The instrumentand rod target heights were equal. If the elevation of point P is227.965m, above datum, what is the elevation of poin..

User Account

All Pages