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3 years ago

According to the food chain below, which of these organisms most likely contains the least concentration of toxins (DDT) ?

Biology

1 answer:

agasfer [191]3 years ago

5 0

Answer:

Hawk

Explanation:

Dichlorodiphenyltrichloroethan which is also known as DDT is a colorless, tasteless and almost odorless crystalline chemical compound. It was originally developed as an insecticide and it causes harm to wildlife animals.

When the chemical are sprayed or gets in contact with the soil it is the terrestrial organisms such as plants and primary consumers who gets affected the most due to direct contact with the chemical.

Animals such as hawks who are arboreal and tertiary consumers from the list of options don’t get affected directly from the source of the DDT contamination which makes them least affected.

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What are two events that can take place for Secondary succession to occur?

Nadya [2.5K]

Researched (copied and pasted so use in your own words)

Disturbances such as forest thinning, floods, fire and wind can all lead to secondary succession. Examples of secondary succession are the gradual replacement of old fields by forest or the vegetation recovery and change following wildfire occurrence.

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3 years ago

What two new activities did neolithic people engage in

MAXImum [283]

The Neolithic marks the period when our specie developed farming and domesticated animals.

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3 years ago

Write a one-paragraph (5-7 sentences) reflection on the dangers of drugs and how they can interfere with you achieving your goal

zysi [14]

Answer:

They can reflect on getting a Job and doing good in life, they could kill a person without them even knowing it. The dangers of drugs Is that they can mess up your life or it could make you so messed up things to yourself. Drugs are bad because they could make life worse, and they could hurt people around you or people you love, drugs can lower your chances of achieving your goals because you could easily get fired or you can lose your mind enough just not to know what you're doing.

Explanation:

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3 years ago

In the exercise to determine the concentration of a solution of CuSO4, for the

Soloha48 [4]

Answer:

This question is incomplete

Explanation:

Experimentally, when trying to determine the concentration of an unknown sample of CuSO₄ with known absorbance, a standard curve is used. The standard curve is a scattered plot/graph in which known concentrations and there respective/corresponding absorbance are plotted on a "X and Y axis" graph (scattered plot). The absorbance is represented on the y-axis while the concentration is represented on the x-axis.

Once this known values are plotted on the standard curve, an unknown value (either absorbance or concentration) can be extrapolated from the curve. What is missing from the question is data required for the standard curve.

This question shows the absorbance of the CuSO₄ has been determined (most likely using spectrophotometer), the concentration could have been extrapolated from a standard curve.

An example of a standard curve is provided in the attachment for guidance.

Download docx

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3 years ago

Choose one property of water that makes it unique. Describe the property and explain the chemical or or physical reason that cau

jarptica [38.1K]

Answer:

Water has properties of cohesion and adhesion.

Explanation:

The single Hydrogen atom and double Oxygen atoms attach to each other in such a way their are minute polar polarity differences. Electron bonds will combine to form one side of the compound as being positive and the other side positive. Positive side of other H2O molecules will attach to the negative side. This bond causes water to adhere to sides of a glass test tube.

Will also create a bead when it drips on another non-porous surface. Adding soap will break the bead (surfactant). Water is the perfect solvent.

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2 years ago