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.
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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:
Which of the following is NOT a method of agricultural application?
Answer:
Agricultural biotechnology is a range of tools, including traditional breeding techniques, that alter living organisms, or parts of organisms, to make or modify products; improve plants or animals; or develop microorganisms for specific agricultural uses. Modern biotechnology today includes the tools of genetic engineering.
Explanation:
pls I dont understand this
in a scientific experiment , an experimental group is
What type of water pollution can cause genetic mutations miscarriages, birth defects, and certain kinds of cancers?
A: Explosives
B: Sediment
C: Radiative material
D: Thermal
Radiative material can cause genetic mutations miscarriages, birth defects, and certain kinds of cancers. So, the correct option is (C).
What are Radiative materials?Radionuclides also called radioactive materials are defined as the class of chemicals where the nucleus of an atom is unstable which achieves stability through changes in the nucleus such as spontaneous fission, emission of alpha particles, or protonation of neutrons or reverse conversion.
Some examples are uranium and thorium, two radioactive elements that occur naturally in the Earth's crust. Over billions of years, these two elements slowly change forms and produce decay products such as radium and radon. These materials can cause cancer, genetic defects etc.
Radioactive Materials Radiation can damage the DNA in our cells where high doses of radiation can cause acute radiation syndrome (ARS) or cutaneous radiation injury (CRI). High doses of radiation can cause cancer in later life.
Thus, Radiative material can cause genetic mutations miscarriages, birth defects, and certain kinds of cancers. So, the correct option is (C).
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In which location is glucose formed?
O Location A
O Location B
O Location C
O Location D
Answer:
B is the answer
Explanation:
If you see the white parts
Which of the following is a group that is especially susceptible to air pollution?
A: Asthmatics
B: People in their 40's
C: High schoolers
D: Marathon runners
Answer:
asthmatics
Explanation:
air pollution effects asthmatics more, they have weaker lungs and low quality air would worsen that making them more susceptible I assume
The Venn diagram shown below compares the nuclear reactions in the sun and nuclear power plants.
Picture shows two ovals which overlap in the middle. The oval on the left has the label 'Sun' on top and 'Combining of atoms' within it. The oval on the right has the label 'Nuclear power plants' on top and 'Splitting of atoms' within it. The overlapping portion has the label P inside it.
Which of the following best describes the process labeled P?
Absorption of radioactive material
Cooling of reacting atoms
Production of water
Release of energy
Answer: It would be D) Release of energy.
Where is the 3' end for the bottom strand of this DNA molecule? (A, B, C or D?)
If Earth's gravitational field strength is 10 N/kg, how many Newtons does a 0.7 kg object weigh?
A. 7N
B.9.3N
C. 10.7N
D. 0.07 N
Explain how you can use highlighting pens to increase your understanding of a text. Write your
answer in complete sentences.
The use of highlighting pens can increase your understanding of a text by: Helping you stay focused, as well as helping you to keep track of the most important part of a text.
Meaning and use of a Highlighting penA highlighting pen as the name implies is a pen with a unique feature used for marking a particular word, group of words and sentences to stand out in a page.
The highlighting pen is used for so many things in schools, churches, and organization these include: Marking a page, noting a key word, marking a word is yet to be understood etc.
In conclusion, The use of highlighting pens can increase your understanding of a text by: Helping you stay focused, as well as helping you to keep track of the most important part of a text.
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How does mutated DNA compare to unmutated DNA?
A: It is identical to the original strand.
B: It is single-stranded instead of double-stranded.
C: It is broken instead of continuous.
D: It is different than the original strand
Answer:
D. Its different than the original strand!
Hope this helps :3
Explanation:
I just took the K12 test :)
16. A diploid cell has 30 chromosomes. How many chromosomes are present in each cell during
prophase I of the meiotic cycle?
A. 15
B. 30
C. 45
D. 60
E. 120
17. A diploid cell has 42 chromosomes. How many chromosomes are present in each cell during
metaphase II of the meiotic cycle?
A. 168
B. 84
C. 63
D. 42
E. 21
Name the two glands that control the nervous system.
Answer:
pituitary and adrenal
A balanced diet for sendintary worker
Help? ASAP pleaseeeeeeee
Answer:
Homologous structures define similarly structured body parts among organisms that serve different functions. They show common ancestry; an example would be a human arm and horse leg (both made of bone, but different uses).
Analogous structures define differently structured body parts that serve the same function. They do NOT show common ancestry. An example would be a whale fin & dolphin fin; one is made of bone and the other cartilage, but they are both used to swim).
Which individual is a producer?
a host who seats customers in a busy restaurant
O a mother who demands quality produce for her family
O a farmer who grows only what his family needs to survive
© a student who builds a bookcase from bricks and boards
A
The individual who can be referred to as a producer is a farmer who grows only what his family needs to survive. Thus, the correct option is C.
Who is a producer?In a food chain, the producers are the organisms which can produce their own food without the help of other organisms. Generally, plants are called the producers of an ecosystem because they produce their own food and gain sustenance from the process of photosynthesis. The process of photosynthesis allows plants to produce food such as glucose (carbohydrate) which is a sugar energy. The breakdown of glucose results into formation of energy in the form of ATP (Adenosine Triphosphate).
The farmers can be referred to as producers as they are growing their own food.
Therefore, the correct option is C.
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change active voice to passive
NONSENSE REPORT
please answer AsAp
Answer:
We've just attended a birthday party
you locked the door
Explanation:
English lesson
can anybody help me :)
Answer:
Option A is correct answer
Explanation:
Because the option A foot is of eagle & eagle easily catches their pray for e.g. snake while others use their foot to either walk or stand.
Answer:
A
Explanation:
The picture in Option A shows feet with talons, which will help in easier prey capture. This allows a predator to catch and hold the prey.
Lower temperatures lead to slower soil formation.
Please select the best answer from the choices provided
T
F
Answer:
true
Explanation:
edg2020
I 26. Guys help, 15 points profit for you.
What equipment was used early on for scientific and archaeological purposes but is now more commonly used in military and industrial expeditions?
Categorical Data
Primary Source Information
Remotely Operated Vehicles
Atmospheric Diving Suits
Answer:
remotely operated vehicles
Increased efficiency ____________ the life of resources.
A: Greatly reduces
B: Extends
C: Largely reduces
D: Completes
The answer to your question is :
0ption:A: GREATLY REDUCES
Which of these is the strongest evidence that all organisms on Earth evolved from a common ancestor?
A. All organisms inherit instructions for their development in DNA.
B. Many species have body parts with homologous structures.
C. Major groups of organisms share a specific type of embryo.
D. The fossil record shows an example of every organism that ever lived.
Genetic code is overlapping because the nitrogen bases are read continuously in groups of three nucleotide without sharing or overlapping.
True or false
Answer:
False
Explanation:
a genetic code will not overlap.
1. What interactions affect protons in an atomic nucleus? More than one answer may be correct.
(a) the nuclear interaction (b) the weak interaction (c) the electromagnetic interaction (d) the gravitatioNl interaction
What happens to an area when there is too much rain or precipitation in that area?
Answer:
Explanation:
DN: When there is more rain than the soil can absorb, water will quickly run off into rivers and creeks to overwhelm culverts and storm drains and cause a flash flood. This depends on several factors including rainfall rate, soil type, terrain, and amount of moisture in the soil.
Which portion of The United states is at a high risk for hurricanes?
O Great lakes
O Desert southwest
O West coast
East Coast
Answer:
The west coast/east coast because hurricanes happen in marine tropic tectonic plates that also cause heavy tropical storms,tsunamis, and hurricanes. So therefore hurricanes apear in west and east coast.
Explanation:
Please help- Select the statement that correctly explains what is thought to have been the animal ancestor.
1) The plant cell walls have similar structures to the exoskeleton of arthropods.
2) Hyphae in fungi closely resembles cells in jellyfish
3) Choanoflagellate protists closely resemble choanocyte cells in sponges.
4) The cell wall of prokaryotes closely resembles the structure of sponges
Answer:
2
Explanation:
i guess worm is the ancestors of animals so i give this answer which is similar to that
Which of the following best describes how an organism inherits physical characteristics, such as eye color, from their parents?
Answer:
Offspring receive chromosomes from their parents, each chromosome contains alleles, each allele contains genes which determine the appearance of an organism#carryonlearning
edlyn moreno
state how glucagon and insulin reaches the pancreas?
Answer:
They are released from the beta cells in your pancreas in response to rising glucose in your bloodstream.
After you eat a meal, any carbohydrate you've eaten are broken down into glucose and are passed into the bloodstream. The pancreas detects he rise in the blood glucose and stays to secrete insulin.
PLEASE HELP!
Which statements are true about the phenomena that occurs between the Sun, Earth, and moon?
A) The position of the moon is relation to the Earth and Sun at a given point determines its phase.
B) A lunar eclipse occurs when a full moon passes directly behind Earth and is covered in Earth's shadow.
C) On Earth, one day is the time it takes Earth to orbit the Sun one time.
D) Tides are caused by the gravitational pulls between the Earth and Sun.
E) The time it takes Earth to revolve once around the Sun is a year.
F) A solar eclipse occurs when the moon passes between the Earth and Sun.
Answer:
All the ones listed below are true