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3 years ago

Who is "Typhoid Mary"?

1 answer:

6 0

Mary Mallon, better known as Typhoid Mary, was the first person in the United States identified as an asymptomatic carrier of the pathogen associated with typhoid fever.

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A hope spot is a

IRINA_888 [86]

Answer:

A hope spot is an area of an ocean that needs special protection because of its wildlife and significant underwater habitats. The two group of islands, considered extremely rich in marine biodiversity, are the first places in India to have been added in the list of 50 global 'hope spots'.

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3 years ago

Animals get energy from the food that they eat. However, when the molecules from the food enter your cells, how do the molecules

Elena-2011 [213]

Answer:

Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP

Explanation:

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3 years ago

HELP PLEASE ASAP

Cloud [144]

A, B, and C. Luster is the light and how light reflects off of it, right?
So, in that case, a non metallic mineral, (think coal) wouldn’t shine much. A metallic mineral would shine, because it’s metal. And something that’s shiny obviously shines.
Go with A B and C.

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3 years ago

In order to keep all other things the same and isolate the effects of one particular variable in the biology experiment, Kate wi

miskamm [114]

Answer:

Make sure all tested rats are the same age.

Offer the same type of food to the rats in each trial.

Explanation:

In order to be able to isolate the effects of one particular variable during a research, all the subjects in each trial must be subjected to the same conditions except the variable whose effects is being isolated.

Hence, Kate must offer the same type of food to the rats in each trial as well as make sure that all tested rats are the same age.

6 0

3 years ago

Consider the scenario in which Mutants A and B are grown in a medium that contains His, but does not contain Trp. For this scena

solmaris [256]

Answer: Attached below is the missing part of your question

answer

Mutant A

1) Requires tryptophan in the growth medium or from a donor mutant

2) Must form nanotubes to obtain it's required amino acid in this scenario:

Mutant B

1) Requires histidine in the growth medium or from a donor mutant

2) Does not need to form nanotubes to obtain it's required amino acid in this scenario:

Explanation:

Mutant A ( Over produces His and cannot produce Trp )

1) Requires tryptophan in the growth medium or from a donor mutant ; This is because the Mutant is an auxotroph for tryptophan.

2) Must form nanotubes to obtain it's required amino acid in this scenario:

This is because growth medium of the mutant is supplemented with histidine

Mutant B ( cannot produce His and overproduces Trp )

1) Requires histidine in the growth medium or from a donor mutant :

This is because Mutant B lacks the biosynthetic pathways necessary for histidine production

2) Does not need to form nanotubes to obtain it's required amino acid in this scenario: because the Mutant cell can easily take up the required amount of Histidine from its surroundings.

3 0

3 years ago