<u>Answer</u>:- Option B Brown
<u>Explanation</u>:-
- When the beetles are living in a vegetation, then the most important point is that they are living in an environment where <em>green is the predominant color.</em>
- Since, the birds who will come to look for food, will have to identify the beetles against a green backdrop the green beetles are <em>most</em> safe as they can easily merge with their green surroundings. This is known as camouflage.
- The mixed beetles will be less fit as compared to the green beetles as the chances of them to be identified by the birds will be more as they are not completely green and are not able to fully merge with the surroundings.
- However, the brown beetles will be <em>least</em> fit to survive in this environment as they can be most easily identified against the green backdrop. They will be the most conspicuous of the three beetles. Thus, the birds will feed more often on the brown beetles and hence, they are least fit to survive in the vegetation.
This phenomena in which the organism who is best adapted to survive in a given environment and leave more progeny is termed as <em>survival of the fittest.</em>
Archaeologists studying an archaeological site use seriation to :
<u>determine the relative age of each layer of objects</u>
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Explanation:
- The goal of archaeology is to understand how and why human behavior has changed over time.
- Archaeologists search for patterns in the evolution of significant cultural events such as the development of farming, the emergence of cities, or the collapse of major civilizations for clues of why these events occurred.
- Archaeologists use a statistical sampling method to select which squares or units they will excavate.
- They will collect surface artifacts, then remove any ground vegetation. Archaeologists screen all soil removed from a unit to recover small artifacts and ecofacts.
- Artifacts include tools, clothing, and decorations.
- Non-portable remains, such as pyramids or post-holes, are called features. Archaeologists use artifacts and features to learn how people lived in specific times and places.
- Archaeologists might study the million-year-old fossils of our earliest human ancestors in Africa.
Answer: Tincture
Explanation:
A tincture can be defined as an extract of plant or animal material which is dissolved in ethanol commonly known as ethyl alcohol.
The solvent concentration is 25-60% are commonly used but it can be increased upto 90%.
Other solvents that is uswed to produce tincture are vinegar, propylene glycol, glycerol.
