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mezya [45]
3 years ago
13

Which statements describe organisms referred to as "colonial"? A. A multicellular organism B. Similar bacteria or protozoa which

group together C. Tissue D. A group of multiple specialized cells.
Biology
2 answers:
dimulka [17.4K]3 years ago
7 0
B. Similar bacteria or protozoa which group together.
jeyben [28]3 years ago
3 0

Answer;

B. Similar bacteria or protozoa which group together

Explanation;

Colonial organisms are clonal colonies composed of many physically connected, interdependent individuals.

All the individual cells of a colonial organism can carry out all functions necessary for life, so they could all be seen as a single organism.

Colonial organisms are more than just a group existing together. They experience advantages from the communal living. They are called colonies because each member of the colony has the capabilities of living and surviving independently on its own, but takes advantage of the colony situation.

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Which molecule from glycolysis or the citric acid pathway serves as the building block for lipid synthesis?
Mariana [72]

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Explanation:

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5 0
3 years ago
Smilin is a (hypothetical) protein that causes people to be happy. It is inactive in many chronically unhappy people. The mRNA i
Studentka2010 [4]

Answer:

The single nucleotide mutation affects the splicing of the mRNA molecule of Smilin in unhappy people. This with result in a truncated protein lacking part of it amino acidic chain

Explanation:

It's true that the information of aminoacids that form the proteins is codified on the exons, but introns also have important information, for example, the sequences related to the splicing of the mRNA exons.

Briefly, during the splicing process, the introns are removed, leaving the mRNA that is going to be translated (there could be also other post translational modifications before going to ribosomes).

Also, there's different ways to splice the different exons. For example, let's say a mRNA has four exons, so the mature mRNA could have exons 1-2-3-4, or 1-2-4, or 1-2-3, it depends on the location of the splicing signals. This are called splicing alternatives, so the same original mRNA can give arise to different forms of a protein.

In the particular case of Smilin, apparently the DNA has a single mutation in the intron for the mRNA of the protein. Despite it might seem as a minor difference, it causes the final mRNA (the one that is translated) to lose an internal stretch of 173 nucleotides.

A possible explanation is that this single mutation is affecting a splicing signaling sequence, making the splicing complexes skip one exon. Again, if we imagine that the original protein has four exons, this means that the happy people has an mRNA with all the exons, while unhappy people is lacking one.

As a result, the protein Smilin will be lacking part of its internal region. The actual effects this has on the protein function will depend on the role of the deleted section.

5 0
3 years ago
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