When the genome of a particular species is said to include 20,000 protein-coding regions, what does this imply? a) there are 20,000 genes. b) each gene codes for one protein. c) any other regions are "junk" dna. d) there are also genes for rnas other than mrna. e) the species is highly evolved.

C

Explanation:

DNA especially I higher organisms contains coding and non-coding regions. Some of these non-coding DNA is transcribed into non-coding RNA such as regulatory RNA and t-RNA. These non-coding regions also form parts of centromeres and telomeres. It has been discovered that humans DNA has a lot of non-coding DNA.

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

i think that d. wind is the answer.   i missed the question when i answered a. currents.