Dichotomous keys might seem difficult because they require accurate observations and understanding of specific biological vocabulary. However, with practice, usage of dichotomous keys can become easier. It's similar to learning a new language.
Dichotomous keys might seem challenging because they require a high level of attention to detail and understanding of specific biological terminology. However, with practice, they become easier to use. A dichotomous key is a tool used in biology to identify an unknown organism by going through a series of choices that lead the user to the correct name of a given item.
To correctly use a dichotomous key, you must carefully observe the organism in question and make accurate observations. Then, you follow the key, making decisions based on your observations. This often involves detailed, specific biological vocabulary and precise measurements which some students may initially find overwhelming.
However, remember that with practice and usage, becoming proficient with dichotomous keys is completely achievable. It's essentially like learning a new language! Once you get the hang of it, it can be a valuable tool in your biological studies.
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density
depth
salinity
Answer: Salinity
Explanation:
Salinity can be natural in some of the natural biomes such as sea water and estuaries. There are some aquatic species which are capable of adapting and surviving in the change in concentration of salt. Those species which are incapable of adapting in the saline environment they decline in number, migrate to different location or even they may extinct. Organisms can tolerate in conditions like changing temperatures, density, and depth.
On the basis of the above description, salinity can be the number one factor for determining the fact that living things can be survive in a body of water.
Answer:
The lungs are made of a soft, elastic, spongy tissue.The large numbers of blood capillaries and rich blood supply gives the lungs their pink colour.
The lungs are pink because they are filled with oxygenated blood that has a pinkish hue due to the presence of oxygen-bound hemoglobin.
The lungs are made up of millions of tiny air sacs called alveoli, which are surrounded by blood vessels called capillaries. These capillaries contain oxygenated blood that has been pumped from the heart. When oxygen from the inhaled air enters the alveoli, it diffuses across the thin walls of the alveoli and into the capillaries. At the same time, carbon dioxide, a waste product, diffuses from the capillaries into the alveoli to be exhaled. The exchange of gases between the alveoli and the capillaries is facilitated by the thin walls and the large surface area of the alveoli.
The oxygenated blood in the capillaries gives the lungs a pinkish color. This is because oxygenated blood is bright red in color due to the presence of oxygen-bound hemoglobin, a protein in red blood cells that carries oxygen. As the oxygen-rich blood flows through the capillaries surrounding the alveoli, it imparts a pinkish hue to the lungs.
Learn more about the color of the lungs here:
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Explanation:
Because these fossils would have had no way to get across the ocean, especially for large terrestrial animals. The continents used to be in different locations, allowing some animals to cross. These animals then died on different continents as they shifted, thereby proving that the continents used to be much closer than they are now.
b. Carbohydrates will dissolve in water but not lipids.
c. Carbohydrates contain hydrogen, carbon, and oxygen and lipids do not.
d. Lipids contain hydrogen, carbon, and oxygen and carbohydrates do not.
Answer:
B. Carbohydrates will dissolve in water but not lipids
Explanation:
Both carbohydrates and lipids have oxygen, carbon and hydrogen molecules in their compositions.
However, the difference is that carbohydrates are polar and lipids are nonpolar. Nonpolar substances can only be dissolved in nonpolar solvents and so they are insoluble in water (which is polar). Compounds with this feature are called hydrophobic.