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Usimov [2.4K]
3 years ago
11

Under which circumstances should we try to control the population numbers of Pfiesteria?

Biology
1 answer:
zvonat [6]3 years ago
8 0

Answer:

Pfiesteria species generally found in estuaries, the population of which are needed to be controlled only when they becomes toxic. Presence of large of fish triggers toxicity in Pfiesteria.

Explanation:

Pfiesteria are known to be associated with fish kills as for example large fish kill in the seas of North Carolina. It also causes blooming of algae in enormous numbers thus make the water bodies, hostile for survival of fishes and other marine lives. It affects human too by release of toxins in air and water often resulting in respiratory problems, infections of gastrointestinal system, headaches and fatigue. In this type of grave circumstances, leading to outburst of population of Pfiesteria, there is an urgent need to control.

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How does nitrogen leave a food chain?
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Segun la informacion que contenga el nucleo¿Como se pueden clasificar las celulas?​
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Answer:

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Explanation:

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Which of the following statements are true for both the recrystallization and replacement modes of preservation? Choose one or m
vladimir2022 [97]

A similarity in both recrystallization and replacement modes of preservation is that delicate tissue and organs are not preserved.

<h3>What are recrystallization and replacement modes of preservation?</h3>

Recrystallization is a mode of preservation of fossils in which the internal structure of the fossils is changed by addition of more minerals to form larger crystal of the same material.

Replacement is a mode of preservation in which new material replaces the original material in the fossil.

In both methods of preservation, delicate tissue and organs are not preserved.

Therefore, a similarity in both recrystallization and replacement modes of preservation is that delicate tissue and organs are not preserved.

Learn more about fossils preservation at: brainly.com/question/2023023

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4 0
2 years ago
Howard is explaining the process by which DNA determines the structure of proteins. His explanation includes this statement. "Th
andrew-mc [135]

Answer:

Transcription and RNA processing (splicing)

Explanation:

Although Howard is almost right, the DNA sequence does not precisely relate to the protein sequence. First of all, the DNA is transcribed to an primary mRNA molecule. Bur before the mRNA is ready to be translated into an amino acid sequence, it must be processed into a mature mRNA.

This includes adding a 3' poly A tail, and a 5' cap, and importantly for this question, splicing.

Splicing is the removal of non protein coding intermediate sequences called introns from the protein coding regions (exons) of a primary mRNA. This means that lots of the DNA sequence is not dictated by the final protein, as many of the intervening sequences have been removed by splicing.

8 0
3 years ago
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