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lara [203]
3 years ago
7

What is the source of energy for all cycles in an ecosystem ?

Biology
2 answers:
jekas [21]3 years ago
8 0
That would be the sun. Hope this helps.
Anastaziya [24]3 years ago
7 0
The sun is the source of energy for the majority of ecosystems, as sunlight is required for photosynthesis. Hope I helped.
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__________ are threatening events that have a relatively short duration and a clear end point.
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The correct answer is C.Acute stressors
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3 years ago
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List ten factors which can be involved in regulating bacterial gene expression (includes specificity and level of expression). "
nirvana33 [79]

Answer:

At least 6 were provided:

1. Transcription.

2. Chromatin domains.

3. mRNA degradation.

4. RNA transport.

5. Translation.

6. Post-transcriptional modification.

Explanation:

Chromatin domains.

Changes to the epigenome can result in changes to the structure of chromatin and changes to the function of the genome.

Transcription.

During transcription, a DNA sequence is read by an RNA polymerase, which produces a complementary, antiparallel RNA strand called a primary transcript.

Post-transcriptional modification.

is a set of biological processes common to most eukaryotic cells by which an RNA primary transcript is chemically altered following transcription from a gene to produce a mature, functional RNA molecule that can then leave the nucleus and perform any of a variety of different functions in the cell.

RNA transport.

mRNA is created during the process of transcription, where the enzyme RNA polymerase converts genes into primary transcript mRNA (also known as pre-mRNA). This pre-mRNA usually still contains introns, regions that will not go on to code for the final amino acid sequence.

Translation.

In translation, messenger RNA (mRNA) is decoded in the ribosome decoding center to produce a specific amino acid chain, or polypeptide.

mRNA degradation.

Different mRNAs within the same cell have distinct lifetimes (stabilities). In bacterial cells, individual mRNAs can survive from seconds to more than an hour. However, the lifetime averages between 1 and 3 minutes, making bacterial mRNA much less stable than eukaryotic mRNA.

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3 years ago
What is the life cycle for a goldfish?​
Rus_ich [418]

Answer:

The life cycle of a goldfish starts out as an egg. The female fish will lay about 25 eggs, but unfortunately only some grow up. The eggs usually hatch within 5 days and if you have a fish tank then you should take the adult fish out or else it may eat the eggs. After the egg hatches, it turns into a fry,(this is what a baby goldfish is called) Once they hatch, they will stay attached to the plants for two days, after that, you should start to feed them. Once they are not fry anymore, they turn into adult goldfish. If you take care of them properly, they could last up to 15 years! Once the fish are complete adults, they can lay eggs. The females rub up against plants and lays eggs while the male Goldfish sprays the eggs to make them fertilize and turn into fry.

5 0
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PLEASE HELP FAST PLEASE <br> Develop a nickname for another organelle and describe why you chose it.
Nesterboy [21]

Answer: . An organelle (think of it as a cell's internal organ) is a membrane bound structure found ... There are actually two different endoplasmic reticuli in a cell: the smooth ... which project into the extracellular space and act like a name tag for the cell.

Explanation:

8 0
3 years ago
What environmental condition contributed to the heat wave experienced in Europe and the thousands of deaths in France? a. pollut
valina [46]

Answer: c. Air pollution

Explanation:

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Air pollution was blamed for having made the situation worse because the pollutants in the air acted to prevent heat from escaping back into the atmosphere which led to increased heat on ground and therefore a heat wave.

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