Can someone help me? :)

Biology

1 answer:

Anni [7]2 years ago

4 0

The answer is B. The reason is because in an RNA strand, A turns into U.

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Someone new is preparing media for lab and adds buffers to the EMB agar that raise the pH to 7.8. The starting pH of EMB plates

mestny [16]

Answer and Explanation:

Eosin Methylene blue agar or EMB agar consists of sucrose, lactose, methylene blue and Eosin Y. These segments make it a differential medium which permits development of gram-negative microorganisms. Gram positive microscopic organisms develop inadequately on this medium.

It is particular for development of gram-negative microscopic organisms. It likewise separates between non-fermenting gram negative enteric microscopic organisms and lactose fermenting.

Lactose fermenting gram negative microscopic organisms use lactose to deliver corrosive which changes the shading to dull purple. Some of the lactose fermenter will exhibit dim provinces with green metallic sheen while different settlements with purple focus. Green metallic sheen is because of creation of solid acids.

In the event that the beginning pH is 7.8 rather than 6.9-7.3, the color won't change shading regardless of creation of acids. Consequently, it won't be conceivable to separate between lactose fermenter and non-fermenters.

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3 years ago

Which of the following is an extinct group of mollusks related to today's chambered nautilus?

saw5 [17]

The answer is B. ammonites.

4 0

3 years ago

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Any two differences between plant cells and animal cells

Natali5045456 [20]

Answer:

A plant cell is surrounded by rigid cell wall whereas animal cell does not have cell wall. Presence of a large vacuole in plant cell, which is small in animal cell. Plant cells are larger than animal cells. Plant cells have plastids whereas animal cells do not have plastids.

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2 years ago

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HELP HELP!! Why might you find fewer photosynthetic organisms at deeper levels of an ocean? Group of answer choices

riadik2000 [5.3K]

1.
B
Photosynthetic organisms require light, in which the sun’s rays can only go so far
2.
C
The energy flow pyramid goes from decomposers to producers, meaning that if producers are dying out due to lack of nutrients, there must be something wrong with the decomposer population

4 0

3 years ago

How does one determine the number of protons, neutrons, electrons in an atom

KengaRu [80]

Remember that the number of electrons are equal to the number of protons, and to find the number of protons you have to look and see the atomic mass of the atom is equal to the number of protons, and to find the number of neutrons you have too subtract the atomic mass to the atomic number.

Example:

You want to find out how many protons, neutrons, and electrons are in Platinum:

Atomic number is equal to the number of protons:
$78 = 78$
So platinum has 78 protons and electrons.
Subtract atomic mass to atomic number:
$195 - 78 = 117$ (forgetting about the decimals)

So platinum has "78 protons, and electrons, and has 117 neutrons."

Hope this helps!

5 0

3 years ago