What part did you need help understanding? Your definition is pretty strong- the epiglottis keeps food from entering the trachea and lungs. It also opens during breathing to allow air into the lungs. Good luck on your test, let me know if you need anymore refreshers!
Answer:
- acceptable for biochemical pathway to remain unknown
- identifies novel candidate genes for a disease
- allows for large sample sizes with a limited budget
- identifies DNA elements that flank a variant
Explanation: Genome wide association studies (GWAS) are a relatively new approach to analyzing genetic sequence and have quickly become a fundamental part of modern genetic studies. Their purpose is to determine alleles that correlate to different diseases and traits.
GWAS focuses on SNPs. The modern unit of genetic variation is the single nucleotide polymorphism or SNP. SNPs are single base-pair changes in the DNA sequence that occur with high frequency in the human genome, inother words, the single nucleotide sites that differ between individuals. By studying SNPs, researchers can analyze a few hundred thousand nucleotides rather than the 3 billion nucleotides that compose the human genome. The basic design of a GWAS is simple and begins by dividing participants into two groups:
* People with a disease/trait of interest
* People without a disease/trait (control group)
The answer is water and the only oxygen-producing bacteria. This cyanobacterium is also known as Cyanophyta, are a phylum of bacteria that acquire their energy through photosynthesis, and are the only photosynthetic prokaryotes able to provide oxygen. In oxygenic photosynthesis, water is the electron donor.
So maybe they share a common ancestor, the also have homologous structures, same structure different function.
A) repeat the experiment but with additional corn plants to increase the sample size EliminateB) add more salt to the experimental condition so that the resulting data is more clear C) test an additional variable such as amount of moisture so that the results are more valid D) revise the original hypothesis to account for the fact that plants do not grow in salty soils