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3 years ago

Lichens are composed of two organisms, a fungus

Biology

1 answer:

algol [13]3 years ago

7 0

Answer:

B) ecological succession

Explanation:

The analogy given in this question describes ECOLOGICAL SUCCESSION, which is the series of changes that an ecosystem undergoes over a period of time. Ecological succession is of two types viz: Primary succession and Secondary succession.

Primary succession involves the series of changes that occurs on a new habitat that has never been previously colonized. This is the case of the colonization of bare rocks with no plant life by LICHENS. The action of the lichen, which involves secretion of acids that disintegrates the rocks into soil, paves way for the colonization of that area by new species.

Lichens, via the role they play in primary succession by helping alter a barren area into a fertile one that accommodates other organisms, makes them be regarded as PIONEERS of primary succession.

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The pKa for the side chain of histidine is 6.0. What is the ratio of the deprotonated imidazole side chain to the protonated sid

Solnce55 [7]

Answer:

When the pKa is 6.0, we can determine the fraction of protonated H is by:

pH = pKa + log [A]/[HA]

Where

A = Deprotonated imidazole side

HA = Protonated side

Given, pH = 5.0

5 = 6 + log [A]/[HA]

log [A]/[HA] = -1 (take antilog of both side)

[A]/[HA] = 0.1

The ratio of the deprotonated imidazole side chain to the protonated side chain at pH 5.0 = 0.1

Given, pH = 7.5

7.5 = 6 + log [A]/[HA]

log [A]/[HA] = 1.5 (take antilog of both sides)

[A]/[HA] = 31.62

The ratio of the deprotonated imidazole side chain to the protonated side chain at pH 5.0 = 31.62

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3 years ago

Diegetic sound in the film monkeys paw 2011

DerKrebs [107]

That your digestive monkeys are from the ancient sanctuaries of the ancient Egyptian Mona Lisa in 2011 Mona Lisa is took a mayonnaise piece of bread and smooshed it onto the ancient Egyptian men for disrespecting her culture because the ancient Egyptian men wanted to dress like blatant don’t know what I’m saying just kidding hi

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2 years ago

Explain the factors that affect the rate of photosynthesis in the early afternoon.

makvit [3.9K]

Answer:

Several factors can affect the rate of photosynthesis: light intensity. carbon dioxide concentration. temperature.

Explanation:

3 0

3 years ago

What levels of protein structure would be affected if all hydrogen bonding interactions were prevented? check all that apply?

fgiga [73]

The proteins exhibit four levels of organization:

1. Primary structure: It refers to a sequence of amino acids join together by the peptide bonds to produce a polypeptide chain.

2. Secondary structure: It is a localized twisting of the polypeptide chain by producing a hydrogen bond. Two types are formed, that is, the alpha helix and beta pleated sheet.

3. Tertiary structure: It refers to the three-dimensional composition of a polypeptide chain. The folding is not regular as it is in secondary composition. It produces ionic bonds, hydrophobic interactions, disulfide bond, and hydrogen bond amongst the polypeptide chains.

4. Quaternary structure: It comprises an amalgamation of two or more polypeptide chains that functions as a single functional unit. The bonds are identical as in tertiary composition.

Thus, the levels of secondary, tertiary, and quaternary protein structure would get affected if all the hydrogen bonding associations were inhibited.

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3 years ago

If Cas9 edits DNA, why is a molecule of RNA needed in a CRISPR complex?

pantera1 [17]

Explanation:

The use of CRISPR/Cas9 avoids the need for protein engineering to develop a site-specific nuclease against a specific DNA target sequence, requiring only the synthesis of a new piece of RNA. This dramatically simplifies and greatly reduces the time needed for gene editing design and implementation.

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3 years ago