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dsp73
3 years ago
14

All of the following cause mechanical weathering EXCEPT ____.

Biology
1 answer:
Elan Coil [88]3 years ago
6 0
The answer is D.<span>carbonic acid </span>because that would be chemical weathering  
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WILL GIVE BRAINLIEST
kvasek [131]

Answer:

Primary succession takes place over a long period of time on newly formed land, while secondary succession occurs quickly in areas that have disrupted by a natural disaster

Explanation:

8 0
1 year ago
What happens when hydrogen ions combine with hydroxide ions
s2008m [1.1K]
  Hydrogen ion, or H-, creates water when combined with a hydroxide ion, OH+.
 
    The 'formula' for water is H20, two hydrogens and an oxygen. 

I hope that I helped but if this still makes no sense, or if I haven't explained it as well, then please don't hesitate to ask further questions. Thank you.
 
6 0
3 years ago
The only process that can change a gene's dna and therefore give rise to new genetic variations in a species is __________.
PSYCHO15rus [73]
Hello Littlefoot2645. I do believe the answer would be that of the process of "mutation," thus it occurs by human interference, specifically, although, initially, naturally-speaking, only occurring by natural selection in onslaught of period time frames.
8 0
2 years ago
Read 2 more answers
How do bacteria regulate transcription of these operons?
Semmy [17]
Kindly see answers below:

1. operon is not transcribe• b.) lac operon: lactose absent• e.) trp operon: tryptophan present2. operon is transcribed, but not sped up by the positive control• a.) trp operon: tryphophan absent• d.) lac operon: lactose present, glucose present3. operon is transcribed quicklu through positive control• c.) lac operon: lactose present, glocuse absent
7 0
3 years ago
One g of fecal matter was suspended in 99 ml saline solution (tube 1). After mixing gently but thoroughly, one ml from tube 1 wa
malfutka [58]

Answer: the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

Explanation:

We know that; Gram negative bacteria looks  pale reddish in color under a light microscope from Gram staining.

therefore

There are 30 red bacterial colonies counted.

1 mL of from tube 1 was removed and added to tube with 99 mL saline (tube 2) dilution is 1/100.

transferred volume  into the plate is 1 mL.

Now, we have to determine the cfu/g Gram-negative bacteria in the fecal sample

Formula to calculate CFU/g bacteria in fecal sample is expressed as;

C = n/(s×d )

where C is concentration (CFU/g) , n is number of colonies , s is volume transferred to plate , d is dilution factor.

so we substitute

C = 30 / ((1/100) × 1)

C = 30 / 0.01

C = 3000

C = 3.0 × 10^3

THERFERE, the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

3 0
3 years ago
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