Answer:
A transcription factor that binds to a gene first and facilitates binding of other transcription factors is called an activator transcription factor.
Explanation:
Transcription factors are proteins that regulate the transcription of genes.Transcription is the process where a gene's DNA sequence is transcribed into an RNA molecule. Transcription is a key step in using information from a gene to make a protein.
The enzyme RNA polymerase, which makes a new RNA molecule from a DNA template, must attach to the DNA of the gene. It attaches at a spot called the promoter.In eukaryotes, RNA polymerase can attach to the promoter only with the help of basal (general) transcription factors. They are part of the cell's core transcription toolkit, needed for the transcription of any gene.
A typical transcription factor binds to DNA at a certain target sequence. Once it's bound, the transcription factor makes it either harder or easier for RNA polymerase to bind to the promoter of the gene.
Some transcription factors activate transcription, other transcription factors repress transcription.
1. Pulmonary Blastomycosis: is transmitted from inhalation of spores from dust and iscaused by Blastomyces dermatitidis. It targets the lungs and shows signs of fever,chills, joint pain, muscle pain and headache and cough.
2. Histoplasmosis:caused by Histoplasma Capsulatum that is transmitted by theinhalation of spores near bird or bat droppings, it targets the alveolar in the lungs andshows signs related to the flu, and chronic cough.
3. Aspergillosis: this is caused by the organism aspergillus spp. It is transmitted by theinhalation of spores from moldy vegetation and targets the lungs. The symptoms arecough with blood, wheezing, fatigue, shortness of breath, fever and chills, chest pain,face swelling and skin lesions.
The best descriptions are those that correctly describe the terms or concepts ecology.
<h3>Which descriptions best fit the given terms?</h3>
The study of living things and their non-living is ecology.
The description of a given term provides information about that term or concept.
The best description of the given terms are as follows:
- Mutualism - a relationship where both organisms benefits
- Commensalism - a a relationship where one organism benefits and the other is unaffected
- Producers - organisms that make their own food
- Food web - show energy flow in an ecosystem
- Biome - a large area defined by climate and organisms that live there
- Stability - ability of an ecosystem to respond to change
- Exponential - growth pattern at constant rate
- Carrying capacity
- Food chain
- Limiting factor
- Parasitism
- Trophic levels
- Biodiversity
- Abiotic factors
- Population
- Climate
- Biosphere
- Consumers
- Keystone species
- Community
Therefore, the best descriptions are those that correctly describe the terms or concepts.
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Answer:
The area between 200 and 1,000 meters (656 and 3,280 feet) is the mesopelagic or “twilight” zone.
Explanation:
Light intensity in this zone is severely reduced with increasing depth, so light penetration is minimal. About 20 percent of primary production from the surface falls down to the mesopelagic zone.
