City water management is analyzing water samples from the local river for water pollutants that could be toxic to humans if found in drinking water. Their collection data is below.
Samples
Location
Nitrates
Carbamates
1
Two miles downriver from drinking water uptake facility
12 mg/L
0.06 mg/L
2
One mile downriver from drinking water uptake facility
9 mg/L
2 mg/L
3
One mile upriver from drinking water uptake facility
8 mg/L
0.04 mg/L
4
Two miles upriver from drinking water uptake facility
10 mg/L
0.05 mg/L
Toxic levels reached when nitrates are greater or equal to 10 mg/L and/or carbamates are greater or equal to 0.04 mg/L.
Which sample location(s)have nitrates or carbamates at toxic levels that could be collected by the water uptake facility?
Samples 1, 2, 4
Samples 1 and 4
Samples 3 and 4
Only sample 4
Aquatic toxicity is found in the four sample sites. But since the water uptake facility collects water from upriver, the correct option is C. Samples 3 and 4.
What is aquatic toxicity?Aquatic toxicity is the property of a substance to causes harmful effects on aquatic or water-dependent organisms.
Aquatic toxicity can be either,
Sharp ⇒ nocive effects after a short exposition periodCronic ⇒ nocive effects after a long exposition periodAquatic toxicity depends on the substance type and its concentration in water.
--
According to the problem statement, toxic levels are reached when
nitrates are greater or equal to 10 mg/Land/or
carbamates are greater or equal to 0.04 mg/L.Sample 1 ⇒ Two miles downriver from drinking water uptake facility
Nitrate → 12 mg/L ⇒ > 10 mg/L ⇒ toxic Carbamate → 0.06 mg/L ⇒ > 0.04 mg/L ⇒ toxicSample 2 ⇒ One mile downriver from drinking water uptake facility
Nitrate → 9 mg/L ⇒ < 10 mg/L ⇒ not toxic Carbamate → 2 mg/L ⇒ > 0.04 mg/L ⇒ toxicSample 3 ⇒ One mile upriver from drinking water uptake facility
Nitrate → 8 mg/L ⇒ < 10 mg/L ⇒ not toxic Carbamate → 0.04 mg/L ⇒ = 0.04 mg/L ⇒ toxicSample 4 ⇒ Two miles upriver from drinking water uptake facility
Nitrate → 10 mg/L ⇒ = 10 mg/L ⇒ toxicCarbamate → 0.05 mg/L ⇒ > 0.04 mg/L ⇒ toxicThe four sample sites have toxic levels. Both of the substances concentrations or at least one of them reaches the toxic level at each site.
However, since water uptake facility can colect water from upriver, we only need to consider these sample sites.
The correct option is C. Samples 3 and 4.
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Answer:
b
Explanation:
What are the two features that result from deposition of groundwater?
P.S please make it simple thx
Answer:
minerals may then be deposited, for example, as stalagmites or stalactites
The water dissolves and carries away the solid rock gradually enlarging the cracks, eventually forming a cave. Ground water carries the dissolved minerals in solution.
Explanation:
Ground water is a strong erosional force, as it works to dissolve away solid rock. Carbonic acid is especially good at dissolving the rock limestone. Working slowly over many years, ground water travels along small cracks.
Which of the following is MOST likely to be a direct environmental effect of air pollution?
A: Extended visibility
B: Acid deposition
C: Increased turbidity
D: Eutrophication
A: Extended visibility
B: Acid deposition
C: Increased turbidity
D: Eutrophication
The correct is B
A Foucault pendulum provides evidence that
Earth
(1) orbits the Sun
(2) has a nearly spherical shape
(3) is tilted on an axis
(4) spins on an axis
Answer:
The answer is 4) spins on its axis if it is wrong then tell me tho oaky
Some of the most important nutrients in the ocean include:
A. Nitrates, carbonic acid, and oxygen.
B. Carbon dioxide, oil, and gold.
C. Phosphate, phytoplankton, and potassium.
D. Phosphates, nitrates, and carbon
A row of tall sunflowers is growing in a backyard garden. Deduce the characteristic of seed plants that enables the plants to grow so high.
Water, air, light, soil nutrients, and the right temperature associated with tenderness and care are the basic aspects to make a plant grow faster and bigger.
What are the characteristics of seeds?All seed plants have seeds which must have an embryo, a seed coat and food. The seed coat covers the seed, letting it to stay inactive until the temperature is just right for germination.Thus, Water, air, light, soil nutrients, and the proper temperature.
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Which of the following is true about DNA transcription and protein translation?
identify the letter of the layer that contains the oldest fossil a to f
The letter of the layer that contains the oldest fossil a to f is "F". According to the Relative dating.
What is Relative dating?Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.
Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
Thus, "F" According to the Relative dating.
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2.Imagine that you are a nitrogen molecule. Write a story about the
journey you take as you travel through the nitrogen cycle. Include
the following in your story:
A description of your trip through the cycle including (1) where
you went, and (2) how you got there;
A description of why your journey will never end;
Include as many of the following terms in your story as well:
Atmosphere
Bacteria
"Fixing"
Nitrogen
Consumers
Producer
Decomposition
Fertilizer
Manure
Runoff
Answer:
Water moves from the ground or oceans into the atmosphere through a process called evaporation. It's a process that happens on a molecular level when the molecules of water are really energized and rise into the air. Now you've got water in the air and water on land. Organisms all over the Earth need water to survive.
Explanation:
please brainless
PLEAS HELP
Which of these is a function of the placenta?
A. To carry nutrients to the cells of the uterus
B. To deliver the blastocyst after childbirth
C. To develop into fetal reproductive tissues
D. To carry wastes away from the embryo
Answer:
The correct answer here is A
Help a brother out the final day of exams pls someone
What type of energy transformation takes place during cellular respiration? Use complete sentences to explain how energy is conserved during cellular respiration.
Answer: Chemical Energy
Explanation: Cellular respiration is the process of transforming chemical energy into forms usable by the cell or organism
Answer:
In this exercise, we will have to explain the transformation of energy in cellular respiration, as:
The type of energy transformation takes is chemical energy and the energy is conserved because The ATP molecule stores energy from cellular respiration and photosynthesis for immediate consumption.
Recalling how cellular respiration works we have:
Cellular respiration is a process by which organisms obtain energy to perform the most diverse activities. Cellular respiration occurs in mitochondria, in the presence of oxygen, and is divided into three steps: glycolysis, the citric acid cycle (or Krebs cycle), and oxidative phosphorylation.
How is energy stored in ATP?
Energy is stored in the bonds between phosphates. The molecule acts as a cellular currency, that is, it is a convenient form of energy transformation. The ATP molecule stores energy from cellular respiration and photosynthesis for immediate consumption.
Explanation:
Why Is Water Wet ?
Answer me fast
What is known about colony
collapse disorder?
O A. Mites are the sole cause of colony collapse disorder.
O B. Invasive species are implicated in colony collapse disorder.
O C. The factors responsible for colony collapse disorder are well known.
O D. Several factors are likely
contributing to colony collapse
disorder.
Answer:
O A. Mites are the sole cause of colony collapse disorder.
Tongue curling in humans is a dominant genetic trait. What are the possible genotypes and phenotypes of their children and the percent chance for each ? Include genotypic and phenotypic ratios
I WILL MARK YOU BRAINLIEST
Use the arrow on the picture and the scale to estimate the length of the chloroplast
Answer:
where's the pic?
Explanation:
What is compost manure ?
Mass is the amount of matter in an object?
Which statement is true?
A. A person's mass on the moon is less than it is on Earth.
B. Whether on the Earth or the moon, a person's mass is the same.
C. Gravity changes the amount of matter there is in an object.
D. Mass is the same thing as weight.
Answer:
D
Explanation:
because Weight is heavy something is and mass is how heavy
1.）An aphid is a small insect which sucks sap in plants. An aphid puts its mouth in the stem of a plant and sucks its nutrients. Name the liquid obtained from the plant and explain why aphids are mostly found in the daytime.
2.）Hasani is a farmer. He uses a weed killer to control the weed population growth on his farm. Weed killers can stop the transportation of certain minerals in plants through the hair root tissue. Explain why.
How to answer this 2 question. Thanks
Answer:
1) sap is mostly sugar, so an aphid must consume a lot of sap to meet its nutritional requirement for protein.
Insects tend to be most active in the early morning that's why aphids are mostly found in the daytime
2) These herbicides interrupt cell division, which stops root growth in seedling weeds. Plants die because they cannot take up enough water and nutrients to sustain growth.
Which substance is a product of glycolysis?
Answer:
Outcomes of Glycolysis
Glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate molecules: Glycolysis, or the aerobic catabolic breakdown of glucose, produces energy in the form of ATP, NADH, and pyruvate, which itself enters the citric acid cycle to produce more energy.
Explanation:
What are potential impacts of using plastic digesting wax worms
Answer:
Wax worms, the larvae forms of moths such as Lesser wax moth (Achroia grisella), Greater wax moth (Galleria mellonella), and Indian meal moth (Plodia interpunctella), were recently discovered to be plastic-eaters. They are called wax worms because they are known to ingest beeswax. It was found that beeswax and polyethylene, that is present in plastic bags, plastic bottles, etc. have the same chemical composition.
Explanation:
Explain how Koppen’s climate system classified climates.
NEED HELP ASAP!
Answer:
The Koppen-geiger system uses colors and shades to classify the world into five climate zones based on criteria like temperature, which allows for different vegetation growth. The Köppen climate classification system categorizes climate zones throughout the world based on local vegetation.
50 points! Pls help asap! Chapter 28 concept mapping introduction to animals
Numbered for easy answering
Some animal features include multicellularity, motility, heterotrophy, a se_xual mode of reproduction, etc.
What are animal features?The expression 'animal features' makes reference to the phenotypic and genotypic characteristics shared by organisms from the Animalia kingdom.
Heterotrophy refers to the fact that animals are unable to synthesize their own food and must eat other organisms to survive.
In conclusion, some animal features include multicellularity, motility, heterotrophy, a se_xual mode of reproduction, etc.
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which situation show a nonrenewable resource in use ?
Answer:
Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.
Explanation:
I think it will be the answer
What type of friction holds an object in place and gives you traction?
A) static friction
B) kinetic friction
Suppose that an elephant with the genotype EEFfggHh reproduces with an elephant with the genotype eeFFGgHh. What is the prob256ability that a baby elephant (called a calf) would have the genotype EeFFGghh?
A. 0
B. 1/32
C. 1/256
D. 1/16
Explantation appreciated!!
Human blood is considered a multiple allele trait meaning an individual can have either (A,
B, AB, or O). Which phenotypic probability would be expected between a cross of a male
with Type O and woman with Type AB?
a. 50% Type A, 50% Type B
. b. 50% Type A, 50% Type O
50% Type AB, 50% Type 0
d. 50% Type B, 50% Type O
c.
Answer:
A. 50% Type A, 50% Type B
Explanation:
To answer this we can draw a punnett square.
Since o if recessive, it can only be expressed if it is not masked by a dominant allele. Therefore the male with type O blood has the genotype oo. A and B are co-dominant, so the woman has genotype AB.
_ | A | B
o |Ao | Bo
o | Ao | Bo
Since A and B are dominant alleles, they will mask the o allele. Therefore genotype Ao will be a Type A phenotype, and genotype Bo will be a Type B phenotype.
Therefore, the phenotypic probabilities for this cross is 50% Type A, 50% Type B. Hence, the answer is A.
Hope this helped!
How is genetic information stored in a cell?
They are stored in the cell in form of chromosomes which contains the DNA which are formed of the Nitrogen bases, phosphate group and sugars .
Nitrogen bases are Adenine , Cytosine , thymine , Guanine.
pair of three bases results in the formation of amino acids which join together to form proteins. Proteins in return act as a information carriers , which carry information to the cell to use the information stored in the DNA
Explain the difference between perfect and imperfect flowers in complete sentences.
Answer:
Explanation:
A flower with male and female parts is called a perfect flower. A flower that is missing male or female parts is an imperfect flower. Plants may have flowers that are complete or incomplete. If a flower has sepals, petals, pis- tils, and stamens, it is a complete flower.
The idea that cells are the basic structural and functional units of life is an example of a scientific what
================================
[tex] \large \sf \underline{Question:}[/tex]
The idea that cells are the basic structural and functional units of life is an example of a scientific what?================================
[tex] \large \sf \underline{Answer:}[/tex]
[tex] \qquad \quad \huge \bold{Cell \: Theory}[/tex]
================================
[tex] \large \sf \underline{Explanation:}[/tex]
The idea that cells are the basic structural and functional units of life is an example of a scientific Cell Theory.
The Cell Theory was proposed by three German scientists called Theodore Schwan, Rudolf Virchow, and Mathios Schleiden.
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1. An airbag in an automobile inflates when a collision occurs, which protects the passenger from serious injury (see the photo on page 254). Why does the airbag soften the blow? Discuss the physics involved in this dramatic photograph.