Use the graph below to determine the range of values in which the LD50 of this pollutant lies. Dose-response curve shows twenty percent of the population died when exposed to thirty-eight milligrams of pollutant A per kilogram of water. Forty percent of the population died when exposed to forty-two milligrams of pollutant A per kilogram of water. Sixty percent of the population died when exposed to fifty-five milligrams of pollutant A per kilogram of water. Eighty percent of the population died when exposed to sixty milligrams of pollutant A per kilogram of water. One hundred percent of the population died when exposed to one hundred milligrams of pollutant A per kilogram of water.
Between 0 and 20 mg/kg
Between 20 and 40 mg/kg
Between 40 and 60 mg/kg
Between 60 and 80 mg/kg
Answers
Answer:
The answer is C, Between 40 and 60 mg/kg
Explanation:
I just took the test and it was right :)
Related Questions
Plant cells are different from animal cells. The diagram below identifies four different structures in a plant cell. Compared to the structures in an animal cell, which of the following structures is found only in a plant cell?
a. Mitochondrion
b. Cell Wall
c. Cytoplasm
d. Nucleus
Answers
What is the difference between mold and cast fossils? A Mold fossils fom from collected minerals and cast fossils do not B. Mold fossils are impressions intock and cast fossils fomm from minerals filling molds cast fossils are impressions Into rock and mold fossils form from minerals filling casts Cast fossils are formed in sedimentary rock but mold fossils are not
Answers
when an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil. This fossil is called a cast fossil. The fossilized imprint is called a mold fossil.
When a person loses consciousness due to a head injury from a car crash, the ______ keeps the body functioning by regulating the flow of information between the brain and the rest of the body
Answers
Answer:
Brain stem
Explanation:
I hope this helps
amoeba sisters: video recap - viruses
answer key?
Answers
OK
wait do you have quizlet?
Please help me asap! Thank you so much!
What is the most harmful form of air pollution: CFCs, carbon dioxide or sulfur/nitrogen containing gas? Defend your answer. (Please explain why you think that is the most harmful form of air pollution)
Answers
Sulfur Dioxide (SO2).
Sulfur dioxide (SO2) is a colorless gas or liquid with a strong, pungent odor.
bacteria in nodules on the roots of plants before an important role in the _______ cycle.
Answers
Not 100% sure tho
Use the drop-down menus to label the organelles in the picture to the right.
The organelles of a plant cell are labeled. Part A is a large hollow structure. Part B is the outside layer of the cell. Part C is a green leaf-shaped structure. Part D is a bean-shaped structure with folding inside.
Label A
✔ Vacuole
Label B
✔ Cell wall
Label C
✔ Chloroplast
Label D
✔ Mitochondria
Answers from Edge ;)
Answers
Answer:
Label A
✔ Vacuole
Label B
✔ Cell wall
Label C
✔ Chloroplast
Label D
✔ Mitochondria
Explanation:
Do primers create a single stranded section of dna
Answers
Answer:
Yes
Explanation:
A primer is a short, single-stranded DNA sequence used in the polymerase chain reaction (PCR) technique. In the PCR method, a pair of primers is used to hybridize with the sample DNA and define the region of the DNA that will be amplified. Primers are also referred to as oligonucleotides.
islfso lufe
(Hint: a non-renewable resource, like coal)
CHAPTER
1 what is the term?
Answers
Answer:
Fossil fuel
Explanation:
How can a person cannot taste PTC I'd both of their parents have the ability to taste PTC?
Answers
Answer:
the parents are (Tt) and each passed down the recessive allele so the child is (tt)
Explanation:
What are some things you think would help identify a fossil? *
Answers
Answer: by studying the Fossil record we can tell how long life has existed on earth,and how different plants and animals are related to each other.often we can work out how and where they lived, and use this information to find out about ancient environments fossils can tell us about a lot about the past.
Explanation: If you like it please mark brainlest....
help I will mark brainliest
Answers
Answer:
A. Clumped, uniform, random
Why are stem cells used widely now, as opposed to cloning?
Answers
Explanation:
short hair for the cover sails type of human embryonic stem cells is not widely recognized how we're not in Umbria
In protein synthesis, how many nitrogenous bases code for a single amino acid?
one
two
three
four
Answers
Answer:
C
Explanation:
EDGE 2022
Oxygen, Sunlight, and temperature are all examples of what type of limiting factor?
Answers
Answer:
Biotic Limiting Factors
These limiting factors can be further broken down into abiotic or biotic limiting factors. Abiotic factors are non-living physical and chemical elements in the ecosystem, such as sunlight, temperature, soil, water, and oxygen
For each sequence of DNA is shown. Write the complementary RNA sequence underneath the letters, then use the codon chart to determine the amino acid sequence. DNA: TTC AAT GGT CTA GGG
Answers
Com RNA: AAC UUA CCA GAU CCC
Amino Acid: (ASN) (LEU) (PRO) (ASP) (PRO)
How is a warm front different from a cold front?
Warm fronts cause snow flurries in the winter, while cold fronts cause several days of rainy weather.
Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather.
Warm fronts cause several days of cloudy weather, while cold fronts cause heavy snow in the winter.
Warm fronts cause thunderstorms in the summer, while cold fronts cause rain when the air is humid.
Answers
Answer:
Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather.
Explanation:
i'm pretty sure
Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather. So, the correct option is B.
What are Warm and cold fronts?A warm front forms when a mass of warm air enters a space that previously held cold air. As warm air passes over cooler air, it rises and cools, which can result in the formation of clouds and precipitation. Unlike a cold front, a warm front often brings with it lighter and more widespread precipitation. Warm fronts often bring warm temperatures and high humidity levels.
When a mass of cold air approaches an area that was previously surrounded by warm air, a cold front is formed. When cold air flows into warm air, the warm air is forced to rise rapidly, which can result in thunderstorms and heavy rainfall. More extreme weather changes, such as a sharp drop in temperature and drop in humidity, are often brought about by cold fronts.
So, the correct option is B.
Learn more about Warm and cold fronts, here:
https://brainly.com/question/21551311
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A small population will most likely
a. have plenty of food to eat. b. have exponential growth.
c. have plenty of space to live. d. All of these are correct.
Answers
Answer:
D. All of these are correct.
Which of the following best explains the roles plants and animals play in recycling carbon? *
25 points
Plants and animals both take in carbon through digestion. They return it to the cycle through decomposition.
Plants collect and store carbon through photosynthesis. Animals exhale carbon dioxide through respiration.
Animals produce carbon through photosynthesis. Plants take in carbon for during cellular respiration.
Plants produce carbon dioxide through photosynthesis. Animals take in carbon dioxide for breathing.
Answers
Answer:
the second one is correct
Which of the following organisms would usually compete with mice for seeds to eat in an ecosystem?
A. producers
B. primary consumers
C. tertiary consumers
D.secondary consumers
Please answer
Answers
how you can play your role to overcome the waste issue in your area?
(giving brianliest with extra points)
Answers
Answer:
Recycle and throw away approprite trash
Explanation:
Recycle and throw away appropriate trash.
The San Andreas Fault marks the boundary between which two tectonic plates?
Answers
Answer:
The San Andreas Fault is the transform plate boundary where a thin sliver of western California, as part of the Pacific Plate, slides north-northwestward past the rest of North America
What process occurs when a river velocity increase and why
Answers
Answer:
Flood Erosion and Deposition: As flood waters rise, the slope of the stream as it flows to its base level (e.g., the ocean or a lake) increases. Also, as stream depth increases, the hydraulic radius increases thereby making the stream more free flowing. Both of these factors lead to an increase in stream velocity.
Somebody please help? Thanks
Answers
Answer:
I don't know man i am guessing the first one and the third one
Explanation:
Answer:
Should be A and C.
Explanation:
Acquired traits are traits a living thing gets over time, such as a scar.
El sistema nerviosos esta formado por un conjunto de fibras acordonadas, largas y delgadas, a estas se les denomina.
Answers
Answer:
fibras nerviosas
Explanation:
Los nervios están compuestos por grupos de fibras nerviosas las cuales consisten de axones y las vainas que los recubren. Una fibra nerviosa está generalmente compuesta por 1-un cilindroeje (axón), es decir, una prolongación alargada de la neurona la cual conduce el impulso nervioso (señal eléctrica), 2-el axolema, o membrana celular del axón, 3-la vaina de mielina que rodea el axón y 4-el neurilema que rodea la fibra. Las fibras nerviosas se clasifican en 1-fibras mielínicas, cubiertas por la vaina de mielina, y 2-fibras amielínicas, no recubiertas por esta vaina. La presencia de la vaina y el diámetro de la fibra influyen en la velocidad de transmisión del impulso eléctrico a través de la fibra nerviosa.
All of the following are believed to be causes of extinction except____
O A. human impact.
O B. meteorite collision.
O c. habitat destruction.
O D. protective breeding programs.
Answers
Which is the correct order of processes that occur as water moves from a lake to a cloud and then back to Earth's surface? evaporation, condensation, precipitation O condensation, evaporation, precipitation O precipitation, condensation, evaporation O evaporation, precipitation, condensation
Answers
Answer:
evaporation condensation precipitation
Explanation:
evaporation is the process in which the water turns into vapor rising to the earths atmosphere. there because of low temperature it turns into condensation, because of its weight it then fall back to earth a process known as percipitation. let me know if this helps thanks
Answer:
A
Explanation:
Which diseases would individuals have the greatest difficulty preventing in themselves?
Answers
Answer: Cystic fibrosis-genes
Explanation:
Trust me that’s the answer
A father sheep has curly wool while a mother sheep has straight wool. Which of these statements explains why one of their baby lambs has curly wool?
Answers
Answer:
This means that the baby sheep received the same set of genes as the father sheep giving it curly wool.
Explanation:
This means that the baby sheep received the same set of genes as the father sheep giving it curly wool.
OR if the baby sheep received a mixed set of genes , one from father , the other from mother , the gene of the father is dominant over the gene of the mother and it has given the baby sheep curly wool.
During fertilization the baby must have received the same set of genes as those of its father. If the baby has received a mixed set of genes then the genes of the father are dominant over the genes of the mother resulting in curly wool.
The fathers gene may be dominant due to environmental circumstances or other factors.
Answer:
Explanation:The baby lamb inherited its copies of the gene for wool shape from its father and not from its mother. Just like its father’s genes, those genes instruct for proteins that connect in ways that make its wool curly.
1. The passage above describes the interactions of several ecosystems, what is the overall theme of the
entire article? "UNDERLINE the sentence that serves as the topic sentence or thesis for the article.
a) to compare the food chains of each ecosystem
b) to convince the reader to protect the environment
c) to explain what keystone species are important in each ecosystem
Answers
Answer: to explain what keystone species are important in each ecosystem
Explanation:
The overall theme of the article is to explain what keystone species are important in each ecosystem.
Keystone species is referred to as an organism that defines the ecosystem as a whole. They help define the habitat's biodiversity.
It should be noted that despite the fact that every living organisms depends on each other, some species are more vital than others and when they're removed, there will be a drastic change in the habitat.