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Allisa [31]
3 years ago
14

Which of these is a biotic factor? topography soil air bacteria

Biology
2 answers:
-BARSIC- [3]3 years ago
8 0
D- are all living things and bacteria is living
marusya05 [52]3 years ago
7 0
D is going to be the correct answer hope this helps
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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
JulijaS [17]

Answer:

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

Load 12 ul on the gel.

Explanation:

DNA Ladder concentration = 1000 ug/ml

1000 ug DNA in 1 ml DNA Ladder solution →    150 ng DNA = 0.15 ug DNA in..... 0.00015 ml = 0.15 ul DNA Ladder solution

6x DNA Loading Buffer → it has to be diluted by an equal volume 6 times (1 ul LB + 1 ul distilled H2O)

An appropriate volume to load on an average agarose gel is 12 ul, so:

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
What are the levels of organization starting with an electron ending with an organism (plant or animal).
Nitella [24]
Answer:
             Level of organization from electron to an organism is shown in the figure, have a look on it will help you a lot.

5 0
3 years ago
#5 and 6 would be ????
NemiM [27]
5. System level
6. Organ level
4 0
3 years ago
16. Which of the following changes in an ecosystem is most likely to cause an increase in the
sweet [91]

Answer:

B

Explanation:

6 0
3 years ago
The increased ranges of plant and insect species resulting from climate change has only negative consequences.
dedylja [7]

False, it has also positive consequences for other specie advantages. 

Like any other change, it has a both positive and negative effect on the said biosphere, ecosystem or the entire living organisms that exists and co-exist. Climate change maybe is one of todays greatest selection and environment forces that reforms a lot of living organism and especially the climate. 

8 0
3 years ago
Read 2 more answers
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