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nasty-shy [4]
3 years ago
11

Propose an explanation why there might be a sudden appearance of a species in the fossil record.

Biology
2 answers:
nekit [7.7K]3 years ago
8 0

Answer: Option (A)

Explanation: According to the geological time scale, new species comes into existence suddenly and are quite fully developed. The gradual evolution of species from one kind to another is hardly seen and a very few of them were able to record in its history.

     For example, in most of the ammonoides, various step-by-step changes have been showcased but only the size and surface texture are observed to be changed.

  Thus, the correct answer is option (A).

stellarik [79]3 years ago
4 0
D) Fossils could not be found in that layer of rock.
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5 0
3 years ago
What percent of the energy consumed by the larvae became biomass that is now available to the next trophic level?
likoan [24]

Answer

         About 10% energy is converted to biomass from one trophic level to another trophic level.

Explanation

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1. Producers (photosynthetic)

2. Primary consumers (herbivore)

3. secondary consumer (Carnivore)

4. Tertiary consumer (carnivore)

5.Quaternary consumer (Carnivore)

6. Decomposer  

                     As larvae are hatched by insects which belong to second trophic level.  About 90% of energy in food is lost at each trophic level. As move down the trophic level the number of organism also decreases in each trophic level. Therefore, energy transfer from one trophic level to another is like a pyramid.  


6 0
3 years ago
Sam’s teacher is trying to model the day/night cycle on Earth. One student holds a large yellow ball to represent the Sun. Anoth
Orlov [11]
Hello!

So, day and night are caused because the earth makes a full rotation on its axis once every 24 hours.

That way, have of Earth is facing the sun (it is morning on that side) and the other half isn't (which is why it is nighttime over there).

For example, if it's nighttime in Canada and America, it's morning in Pakistan and India. This is because Pakistan and India are facing the sun whilst Canada and America are not.

A N S W E R:

The balls should be moved so that half the Earth is facing the sun and the other half is not. This would be 24 hours. As for the sun, it is a gas, not a solid, so it doesn't rotate like one. However, that does not mean that it is not rotating to some extent.
4 0
3 years ago
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Which is not a topic of biology?
Sonbull [250]

Answer:

the speed at which hummingbirds fly because that is actually a part of physics

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A different DNA ladder from NEB (Cat #N3200L) comes as 500 uL of a 1000 ug/mL solution and is not pre-mixed with the 6 X DNA loa
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Answer:

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2 ul Loading Buffer + 9.85 ul dH2O + 0.15 ul DNA Ladder = 12 ul

But since 0.15 ul is a very small volume and mistakes could be made while measuring it, let's make double:

4 ul Loading Buffer + 19.70 ul dH2O + 0.30 ul DNA Ladder = 24 ul

And load half of that solution (12 ul) on the gel.

5 0
3 years ago
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