<span>Which characteristic defines all dichotomous keys?
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<span>D.Each key is a mathematical formula.
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Answer:
Air masses move from high-pressure areas to low-pressure areas.
Explanation:
Pruitt’s city must be located more or less within the equator for it to be dominated by maritime tropical air mass. This region receives ample sunlight throughout the year due to the relative positon of the sun. Its atmosphere is therefore generally highly heated than that of the polar regions. The air in the tropics region becomes less dense and rises into upper atmosphere. The denser and cooler maritime polar air mass from the poles moves in to replace the rising air in the tropics hence creating incoming cooler winds. This is how trade winds are created across the globe distributing energy around the world to a more or less homeostatic level.
Evolutionary relationships among species can be studied when similar structures or materials eg the wings of a bat and the arm of a bird or similar proteins between two different species. This proves to show relationship among organisms.
Analyses of the protein <u>Cytochrome C</u> can be used to study this types of evolutionary relationships.
- Cytochrome C is an antioxidative enzyme that is a part of the electron transport chain in mitochondria.
- Mitochondrion is an organelle that majority of living organisms share in common.
- This protein is therefore found present in almost all organism carrying out cell respiration.
- Therefore this protein can be used to analyze and study evolutionary relationship among organisms with this protein.
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Answer;
-The conservation of "junk DNA" sequences in diverse genomes suggests that they have important functions.
Explanation;
-The term junk DNA refers to regions of DNA that are noncoding. DNA contains instructions (coding) that are used to create proteins in the cell. However, the amount of DNA contained inside each cell is vast and not all of the genetic sequences present within a DNA molecule actually code for a protein.
-Some of this noncoding DNA is used to produce non-coding RNA components such as transfer RNA, regulatory RNA and ribosomal RNA. However, other DNA regions are not transcribed into proteins, nor are they used to produce RNA molecules and their function is unknown.