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Tasya [4]
2 years ago
9

You use a flashlight to observe a mineral. What can you conclude if the mineral is waxy and dull?

Biology
2 answers:
butalik [34]2 years ago
7 0
Answer: B

Explanation: Hope you have a good day!! :)
Step2247 [10]2 years ago
5 0

the mineral is non-metallic........

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A poisonous substance enters the food chain through the soul. This substance doesn't break down in the bodies of living organism
Alecsey [184]

Explanation:

Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.[1] This increase can occur as a result of:

Persistence – where the substance cannot be broken down by environmental processes

Food chain energetics – where the substance's concentration increases progressively as it moves up a food chain

Low or non-existent rate of internal degradation or excretion of the substance – mainly due to water-insolubility

In biomagnification the concentration of the persistent toxins (crosses) increases higher up the food chain.

In this scenario, a pond has been intoxicated. As we go further into the food chain, the toxin concentration increases, causing the top consumer to eventually die of intoxication.

Biomagnification is the build up of toxins in a food chain. The DDT concentration is in parts per million. As the trophic level increases in a food chain, the amount of toxic build up increases. The x's represent the amount of toxic build up accumulating as the trophic level increases. Toxins build up in organism's fat and tissue. Predators accumulate higher toxins than prey.

Biological magnification often refers to the process whereby certain substances such as pesticides or heavy metals work their way into lakes, rivers and the ocean, and then move up the food chain in progressively greater concentrations as they are incorporated into the diet of aquatic organisms such as zooplankton, which in turn are eaten perhaps by fish, which then may be eaten by bigger fish, large birds, animals, or humans. The substances become increasingly concentrated in tissues or internal organs as they move up the chain. Bioaccumulants are substances that increase in concentration in living organisms as they take in contaminated air, water, or food because the substances are very slowly metabolized or excreted.

Contents

Processes Edit

Although sometimes used interchangeably with "bioaccumulation", an important distinction is drawn between the two, and with bioconcentration.

Bioaccumulation occurs within a trophic level, and is the increase in the concentration of a substance in certain tissues of organisms' bodies due to absorption from food and the environment.

Bioconcentration is defined as occurring when uptake from the water is greater than excretion.[2]

Thus, bioconcentration and bioaccumulation occur within an organism, and biomagnification occurs across trophic (food chain) levels.

Biodilution is also a process that occurs to all trophic levels in an aquatic environment; it is the opposite of biomagnification, thus when a pollutant gets smaller in concentration as it progresses up a food web.

Lipid, (lipophilic) or fat soluble substances cannot be diluted, broken down, or excreted in urine, a water-based medium, and so accumulate in fatty tissues of an organism, if the organism lacks enzymes to degrade them. When eaten by another organism, fats are absorbed in the gut, carrying the substance, which then accumulates in the fats of the predator. Since at each level of the food chain there is a lot of energy loss, a predator must consume many prey, including all of their lipophilic substances.

For example, though mercury is only present in small amounts in seawater, it is absorbed by algae (generally as methylmercury). Methyl-mercury is the most harmful variation of mercury. It is efficiently absorbed, but only very slowly excreted by organisms.[3] Bioaccumulation and bioconcentration result in buildup in the adipose tissue of successive trophic levels: zooplankton, small nekton, larger fish, etc. Anything which eats these fish also consumes the higher level of mercury the fish have accumulated. This process explains why predatory fish such as swordfish and sharks or birds like osprey and eagles have higher concentrations of mercury in their tissue than could be accounted for by direct exposure alone. For example, herring contains mercury at approximately 0.01 parts per million (ppm) and shark contains mercury at greater than 1 ppm.[4]

DDT is thought to biomagnify and biomagnification is one of the most significant reasons it was deemed harmful to the environment by the EPA and other organizations. DDT is stored in the fat of animals and takes many years to break down, and as the fat is consumed by predators, the amounts of DDT biomagnify. DDT is now a banned substance in many parts of the world.[5]

7 0
2 years ago
State TWO ways in which the angiosperms are better adapted to a terrestrial life than the bryophytes.​
tester [92]

Answer:

All vascular plants have water-conducting tissue and are better adapted for life on land than the bryophytes; they are also characterized by a dominant sporophyte generation.

7 0
2 years ago
How do you calculate magnification on a light microscope?
aniked [119]

Answer:

In order to ascertain the total magnification when viewing an image with a compound light microscope, take the power of the objective lens which is at 4x, 10x or 40x and multiply it by the power of the eyepiece which is typically 10x.

5 0
3 years ago
_______ is a technique that uses the images from several telescopes to produce a single image.
vesna_86 [32]
<span>The technique that uses the images from several telescopes to produce a single image is called 'Astronomical interferometery. By combining images from several telescopes, it is possible for astronomers to create detailed images with high resolutions. </span>
5 0
3 years ago
Which statements describe the inheritance of traits? Select three options.
liraira [26]

Answer:

<u><em>The correct options are:</em></u>

<u><em>All traits are inherited.</em></u>

<u><em>Offspring inherit one allele for a gene from each parent.</em></u>

<u><em>An offspring with two identical alleles for a trait is homozygous.</em></u>

Explanation:

  • In the biological world, a trait can be described as a genetic characteristic which makes up an organism. Every organism has a particular set of traits.

  • Traits are inherited from parents, however they can be influenced by the environment.

  • The alleles of a gene make up the genotype and the influencing phenotype. An organism acquires one allele for the gene pair from each parent.

  • When both the alleles of a gene pair are similar, the organism is said to be homozygous for the trait. If both the alleles of a gene pair are different, the organism is said to be heterozygous for the trait.

3 0
2 years ago
Read 2 more answers
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