A facultative parasite refers to a species, which may resort to parasitic activity, but is not completely dependent on any host for finishing its life cycle. Therefore, the growth of Armillaria fungi inside a tree's roots, making the tree to rot, but will survive even if the tree dies, is an example of facultative parasitism.
An obligate parasite refers to a parasitic species, which cannot finish its life-cycle in the absence of a suitable host. Therefore, rickettsia bacteria's tendency to surviving only in a eukaryotic cell is an example of obligate parasitism.
A long-term symbiosis or biological association in which members of one species attain benefits while those of the other species is neither harmed nor are benefited is known as commensalism. Hence, a pseudoscorpion, a kind of arthropod hiding under the wings of beetle for protection and transportation, however, it does not affect the beetle is an example of commensalism.
Predation refers to a biological association, where one species, the predator, kills and consumes another species, known as prey. A freshwater amoeba feeds on bacteria in the water is an example of predator and prey.
There are 5 steps of the scientific method:
1. Make an observation.
2. Form a question.
3. Form a hypothesis.
4. Conduct and experiment.
5. Analyze data and draw a conclusion.
Based off this problem:
1. It doesn't specifically say that an observation was made but since it says she's studying it, it may count as an observation???
2. No question is asked because it doesn't say that she is wanting to know what the effects are of sleep deprivation for twelfth graders during midterms.
3. There is no hypothesis stated because she is not making a prediction on the outcome.
4. I suppose the data collected that she turned in was the experiment so I'm pretty sure she did conduct the experiment.
5. She just turned in her data but no analysis or conclusion is said to be made.
Without further ado, it seems that three steps were actually left out but if I had to choose, I believe that steps 3 and 5 were left out but I may be wrong. Sorry I couldn't provide a direct answer but I hope my thought process is helpful.<span />
Answer:
D.They contain a regulatory domain that is functional when removed from the DNA-binding domain.
Explanation:
Transcriptional activators are transcriptional factors that positively regulate transcription of the gene (increase gene transcription). They usually contain two functional domains:
- DNA-binding domain which interacts with DNA
- Activation domain which interacts with other proteins.
Mechanism of action of activators includes their binding to the enhancers (DNA sequences) and recruitment of RNA polymerase II to the promoter.
The answer is a mutation. Its a mutation because a mutation can cause an organism to be deformed an in some cases due to the deformation it will not be able to feed or defend for it self. For example, if a Giraffe were to be born with a short neck it would not be able to feed because trees are tall. The answer is mutilation.
