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

Answer:

the second one is correct

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.

Answer:

C

Explanation:

EDGE 2022

Explanation:

short hair for the cover sails type of human embryonic stem cells is not widely recognized how we're not in Umbria

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

Sulfur Dioxide (SO2).

Sulfur dioxide (SO2) is a colorless gas or liquid with a strong, pungent odor.

Answer:

the parents are (Tt) and each passed down the recessive allele so the child is  (tt)

Explanation:

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....

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.

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.

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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

Answer:

Brain stem

Explanation:

I hope this helps

Answer:

Recycle and throw away approprite trash

Explanation:

Recycle and throw away appropriate trash.

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.

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:

Answer:

D. All of these are correct.

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.

Answer: Cystic fibrosis-genes

Explanation:

Trust me that’s the answer

Answer:

A. Clumped, uniform, random

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.

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.

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Answer:

Label A

✔ Vacuole

Label B

✔ Cell wall

Label C

✔ Chloroplast

Label D

✔ Mitochondria

Explanation:

Answer:

Fossil fuel

Explanation:

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.