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Gala2k [10]
3 years ago
12

1. Which of the following can be measured the most easily?

Geography
1 answer:
zimovet [89]3 years ago
4 0

1. C) Species diversity

It is not easy to perform any measurement about the species, be it its diversity, richness, or evenness. The easiest though seems to be the measuring of species diversity. This measurements simply gathering information about the number of species in a particular area, which is usually the easiest thing to do, as at least one individual of a species is needed so that it can be added in the measurement. The species richness and evenness though are harder, as in order to be performed, apart from knowing all the species, there should be measurement about how big of a population the species have, which can be very tricky, and in some cases almost impossible to perform, which is why it is often used a mathematical model to predict an approximate number, which often is not correct.

2. A) They can consist of biotic changes associated with a boundary

The edge effects are effects that occur at the boundaries of the biomes. At this boundaries, the two or more biomes that come in contact interact, start to mix and create a zone where there are representatives of both biomes, kind of like a transitional zone. Because around the boundary there are species from both bomes, changes start to occur, as the species adapt to the conditions, but they also change the living conditions, as well as competing with each other which can further affect one of the biomes and its structure.

3. A) aposematic

The butterflies tend to have aposematic coloration. This type of coloration does not provide camouflage for the butterflies, but instead it makes them stick out. It is a coloration where the colors are few and very intense. The reason why the butterflies have this type of coloration is that it is a sign of warning for the predators that they are not good for eating and that they can be harmful, thus to avoid them. The predators usually learn this from a young age, and tend to avoid the butterflies that have such coloration.

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Consider a sample of water from a stream found to have an initial DO of 10.0 mg/L. It is placed directly into a BOD bottle and i
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The BOD5 for this sample is 5 mg/L

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The BOD5 takes into consideration the difference between the initial DO and the final DO divided by the fraction of the sample tested in a 300 mL BOD flask. The problem states that the sample was directly placed in a BOD bottle so we assume that the volume used was 300 mL of the water sample. The fraction of water is 1 (300/300).

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6 0
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How do scientists determine the relative age of rocks?
NISA [10]

Answer:

Super position

Faunal Succession

Crosscutting Relationships

Inclusions

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Superposition: The most basic concept used in relative dating is the law of superposition. Simply stated, each bed in a sequence of sedimentary rocks (or layered volcanic rocks) is younger than the bed below it and older than the bed above it. This law follows two basic assumptions: (1) the beds were originally deposited near horizontal, and (2) the beds were not overturned after their deposition.

Faunal Succession: Similar to the law of superposition is the law of faunal succession, which states that groups of fossil animals and plants occur throughout the geologic record in a distinct and identifiable order. Following this law, sedimentary rocks can be “dated” by their characteristic fossil content. Particularly useful are index fossils, geographically widespread fossils that evolved rapidly through time.

Crosscutting Relationships: Relative ages of rocks and events may also be determined using the law of crosscutting relationships, which states that geologic features such as igneous intrusions or faults are younger than the units they cut across.

Inclusions: Inclusions, which are fragments of older rock within a younger igneous rock or coarse-grained sedimentary rock, also facilitate relative dating. Inclusions are useful at contacts with igneous rock bodies where magma moving upward through the crust has dislodged and engulfed pieces of the older surrounding rock.

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