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irina1246 [14]
3 years ago
15

The most weathered and leached of all soils are the ________.

Biology
1 answer:
mrs_skeptik [129]3 years ago
3 0
The most weathered and leached of all soils are the OXISOLS.
Oxisols are heavily weathered soils that are found primarily in the inter tropical regions of the world. The soil is typically rich in iron and aluminium oxides minerals. The soil usually have very low level of fertility.
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A microbiologist plated a bacterium on a specific medium. After incubation, she noted that the previously yellow medium was now
alexdok [17]

Answer:

A differential medium

Explanation:

Bacteria require nutrients for growth, and in order to culture (grow) them and study their characteristics, different types of media are used.

A selective media is used to grow a particular group of organism while suppressing another. So a selective media usually has an inhibitory agent, which will inhibit the growth of the undesired group. An antibiotic can be added to a medium to make it selective.

A general purpose medium as the name implies can be used to grow any group of bacteria. It has no inhibitory agent and indicator that differentiates between organisms. An example of general purpose media is nutrient agar .

A non-synthetic media is made from natural ingredients.

A differential media differentiates between groups of organisms. Example of differential media is MacConkey agar and Mannitol Salt agar. On MacConkey agar, lactose fermenting bacteria turn pink while non-lactose fermenting bacteria are colorless.

On Mannitol Salt agar, mannitol fermenting bacteria turn yellow while non-mannitol fermenting bacteria are colorless. Mannitol Salt agar is also a selective medium. It has a high salt concentration which inhibits certain organisms.

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3 years ago
What skill is a scientist using when she listens to the sounds that whales make
aliya0001 [1]
It is called echoloction
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What was the second organism to be found here on planet Earth?
Aleks [24]

Answer:

Prokaryotes

Explanation:

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Please help! i will give brainliest to the first person, but you must have the CORRECT answer!
stiv31 [10]

Answer:

D

Explanation:

all these things

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The evolution of eukaryotic cells most likely involved _____.
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Absorbing prokaryotic cells. This theory is called the endosymbiotic theory.
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