Answer:
B
Explanation:
ap classroom
It would take 0.827 g of arsenic to reach the LD50 in a 140-pound person.
The lethal dose 50 (LD50) for arsenic in humans is 13 mg/kg.
What is the LD50?LD50 is the amount of a material, given all at once, which causes the death of 50% of a group of test animals.
To calculate the number of grams of As that it would take to reach the LD50 in a 140-lb person, we need to convert 140 lb to kg using the conversion factor 1 lb = 0.454 kg.
140 lb × 0.454 kg/1 lb = 63.6 kg
The LD50 of As is 13 mg of As per kg of body mass. The mass of As to reach the LD50 in a 63.6-kg is:
63.6 kg BM × (13 mg As/1 kg BM) × (1 g As/1000 mg As) = 0.827 g As
It would take 0.827 g of arsenic to reach the LD50 in a 140-pound person.
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The energy that is not transferred to the next trophic level as biomass is not lost or destroyed. It is transferred to the __________. What word completes the sentence?
Answer:
Atmosphere.
Explanation:
The Law of Conservation of Energy states that energy cannot be destroyed but can only be transformed or converted from one form to another.
This ultimately implies that, the energy that is not transferred to the next trophic level as biomass is not lost or destroyed. It is transferred to the atmosphere.
A table in a room is like a
B. Not alive
D. 46 Total
E Nucleus
Answer:
nucleus im pretty sure haha
Explanation:
A plant can have green (G) or yellow (g) leaves. It can also have a long (K) or
short () stem. A scientist is preparing a Punnett square for a dihybrid cross
of a plant with a genotype GGKK. What possible gametes can the plant
produce?
O A. GG, Kk
OB. GK, Gk
OC. GK gk
OD. GK, Gk, gk, gK
12. What is the function of the vacuole? *
(1 Point)
A. sac that stores water, nutrients and waste products
B. sac filled with digestive chemicals
C. jelly-like substance within the plasma membrane
D. stack of membranes that package materials
The vacuoles are the structures found inside the cells that store water, nutrients as well as waste products. So the correct option is option A.
The vacuole plays a vital role in many cells. Mature cells of all land plants, most fungi, and algae (with the exception of prokaryotes) contain vacuoles. On the other hand, animal cells and immature plant cells (as well as some highly immature plant cells (stone cells) contain no vacuoles.
These vacuoles store the essential nutrients and water that a cell needs to survive. They also contain the waste of the cell and protect it from contamination.
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The analysis of rRNA gene sequences to compare evolutionary relationships is known as
O molecular phylogenetic analysis.
O RNA sequence comparison.
O molecular evolutionary analysis.
O molecular clock analysis.
Given is a strand of DNA, fill in the corresponding RNA strand and find which amino acids that strand codes for.
Answer:
The correct answer would be -
RNA - AUG GGG CCU UAC UAA
Amino acid -methionine-glycine-proline-tyrosine -stop codon
Explanation:
In the process of protein synthesis, the first process is known as transcription which involves the transcribing the mRNA strand from the DNA strand in a complementary manner. In this manner, Adenine transcribes into uracil and cytosine transcribe into guanine similarly thymine into adenine and guanine into cytosine.
Then, DNA strand - T-A-C-C-C-C-G-G-A-A-T-G-A-T-T will change into AUG GGG CCU UAC UAA and every three codes represent a triplet codon that translates into an amino acid first code called start codon and normally code for methionine (AUG) and last code for stop and does not code any amino acid.
Then, the amino acid will be - methionine-glycine-proline-tyrosine -stop codon
Please answer these questions as soon as possible.
5. What is an element?
6. What happens when neutral objects interact with charged objects?
7. Do positive and negative objects always move toward each other?
8. Will positive and negative objects repel each other?
9. Will there be an interation between the two?
10. Do light weight objects seem to be attracted to charged objects?
11. How does an objects charge affect it's interactions with neutral objects?
separation of dry sand,water and palm oil
Answer:
evaporation??
Explanation:
PLEASE HELP When do lunar eclipses occur?(1 point)
A. They happen every month during the new moon.
B. They happen infrequently during the full moon.
C. They happen every month during the full moon.
D. They happen infrequently during the new moon.
When was the last time the United States and Mexico fought a war? O A. 1903 to 1904 O B. 1939 to 1940 O C. 1846 to 1848 D. 1800 to 1804
Answer:
It is 1846 to 1848
Explanation:
Hope it helps
Please help it’s due soon...
Answer:
75%
Explanation:
Which organism is most likely to be found in a deepsea trench?Immersive Reader (1 Point) a. Archaebacteria b. Eubacteria c. Protist d. Fungus
The organism that is most likely to be found in a deep sea trench is Archaebacteria. The correct option is a.
What is Archaebacteria?The domain of single-celled organisms is called Archaea. These microbes are prokaryotes because they lack cell nuclei.
The term "archaebacteria," which was used to describe archaea when they were first categorized as bacteria, is no longer in common usage.
The group of microorganisms known as archaebacteria is frequently referred to as a kingdom. They are thought to be an ancient form of life that originated independently from bacteria and blue-green algae.
Archaea are well known for their preference for living in harsh conditions.
There is likely life there, and that life is likely an archaeal species whether it is extremely hot (hotter than 100° Celsius), freezing, acidic, alkaline, salty, deep in the ocean, or even assaulted by gamma or UV radiation.
Thus, the correct option is a.
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Which activity is NOT part of the hydrosphere?
A. rain falling from clouds
B. fish swimming in a pond
C. waves pounding a sandy shore
D. a stream tumbling over large rocks
Explanation:
rain fallung from clouds
When 72.9g of magnesium is reacted with 28.0 of nitrogen gas, no magnesium or nitrogen is left over. How much magnesium nitride is produced?
A general (non specific) way to describe something such as color, shape, and hight
Answer:
An unconformity happens when rocks do not follow normal geologic rules.
A geologic gap happens when rock is eroded before the sediment is deposited.
Explanation:
Involuntary muscle includes _________.
A) skeletal muscle only
B) smooth muscle only
C) smooth muscle and cardiac muscle only
D) smooth muscle, cardiac muscle, and some skeletal muscle
Answer:
answer part d
Explanation:
smooth muscle, cardiac muscle, and some skeletal muscle
Involuntary muscle includes smooth muscle and cardiac muscle only.
What is meant by involuntary muscle?
Muscles that contract or move voluntarily are known as involuntary muscles. Involuntary muscle action is controlled by the autonomic nervous system. The internal organs or viscera that exhibit consistent, gradual contractions and involuntary motions are typically connected with these muscles. The heart is one such uncontrollable muscle.The autonomic nervous system, hormones, and local variables can cause the involuntary activity of the majority of involuntary muscles by neural stimulation. But in other muscles, such as the walls of visceral organs, extending the muscle can cause an involuntary muscle contraction.
Therefore, option (C) is correct.
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Erythrocytes might the best of example of form equals function because they lack many organelles. What organelles are absent in erythrocytes?
T (tall) is dominant over t (short)
G (green) is dominant over g (yellow)
Cross a short yellow, plant with a plant that is heterozygous for both traits
Answer:
The crossing plant with short yellow should be tall green
Explanation:
short yellow = tg
tall green = TG
their kids' traits = Tt, Tg, tG, gG (all heterozygous)
Answer:
sorry its kinda messy i added a picture
What is a non-renewable resource?
A. A resource that has already been used up
B. A resource that is infinitely abundant
C. A resource generated at a rate that
is much faster than it is used
D. A resource generated at a rate that
is much slower than it is used
How does this quote reflect the influence of Enlightenment ideas on the Founding Fathers?
Answer: The United Nations promotes universal human rights.
It shows support for individual liberties.
Explanation:
Answer:
they reflected because they supported individual liberties
Explanation:
none
1) what important lesson can we learn from Saturn?
2) what important role does Saturn play?
Answer: 1- Saturn is really synonymous with the human path toward wholeness, and liberation "from the chains that bind us", for it is through learning life's lessons that we attain true freedom, experience personal power and connect with universal Truth.
2- Saturn believes in discipline and strictness and never likes chaos and disobeys. In Hindu Astrology, Saturn has great significance. People are afraid of this planet due to his strictness and discipline. The slow transit of this planet offers two important common periods namely Sadhe Sati and Dhaiya.
Explanation: Hope this helped! :)
A virus causes the common cold.
O True
O False
Answer:
false
Explanation:
It can cause many more things and it depense on the type of virus!
A part of the crust that is broken and moves
Answer:
The Earth's crust and upper part of the mantle are broken into large pieces called tectonic plates. These are constantly moving at a few centimetres each year.
Explanation:
Does anyone know what the 4.06 module exam password and science is? I’m too scared to ask my teacher :-(
What tool is used in analyzing bullets?
Lighted microscope
O Comparison microscope
O Bullet microscope
O Laser microscope
Answer:
laser microscope
Explanation:
because you want to show the finger print
Answer:
Comparison microscope
Explanation:
i just took the test
Question 11 (1 point)
Saved
The simple one-celled organism seen here moves by streaming its cytoplasm into “false feet “ or pseudopods. It can easily change shape to move and engulf its food. What is the name of this animal-like protists?
Question 11 options:
amoeba
paramecium
euglenoid
Diatoms
Question 12 (1 point)
Saved
Both the euglena and paramecium seen here have___?
Question 12 options:
chlorophyll and are producers
projections that help them move
specialized cells to detect light.
a macronucleus and a micronucleus.
Question 13 (1 point)
We use yeast, seen below, when we make bread. Some warm water and a little sugar and yeast are ready to divide through budding. Each yeast cell is identical to its parent cell. This is similar to regeneration in protists. This is a form of __________ reproduction.
Question 13 options:
abiotic
asexual
genetic
sexual
Question 14 (1 point)
Lichens, like the one shown in the picture below, are usually combinations of algae and fungi that have a beneficial “mutualisic” relationship know as _____?
Question 14 options:
saprophytic
parasitic
symbiotic
autotrophic
Question 15 (1 point)
Fungi can be beneficial or destructive. One type of fungi, corn smut, attack grain plants like corn. What would likely happen to these crops when they are attacked by smut?
Question 15 options:
The crop yield is increased, because the fungi is symbiotic.
The plants stop reproducing
Results in huge crop loss, because the fungi is parasitic.
Question 16 (1 point)
Which letter from the fungus diagram represents the hyphae?
Question 16 options:
Point A
Point B
Point C
Point D
Question 17 (1 point)
Jimmy and Joanna were walking in their backyard and noticed a mushroom growing on the outside of a dead tree. Jimmy claimed that the mushroom was a plant, but Joanna said that it was not a plant, but a fungus.
In this case, what evidence BEST supports Joanna's claim?
Question 17 options:
The mushroom was a producer.
The mushroom was a autotroph.
The mushroom was a parasite.
The mushroom was a heterotroph.
Question 18 (1 point)
This is a unicellular protist called euglena. It lives in the water and swims around using the long flagella you see on one end. What do you, a complex multicellular human, have in common with the euglena?
Question 18 options:
They both can move.
Our cells are exactly the same.
Human cells move around using flagella.
The cells of multi cellular organisms must be in water also.
Question 19 (1 point)
A student performs an experiment to test the growth of bread mold. The student places four identical slices of white bread in individual plastic zip bags. Two of the slices are moistened with one pump of a spray bottle. The table describes the experiment and results.
What conclusion can be drawn from the experiment?
Question 19 options:
High moisture and low temperature encourage mold to grow.
Low moisture and high temperature encourage mold to grow.
Both low moisture and low temperature encourage mold to grow.
Both high moisture and high temperature encourage mold to grow
Question 20 (1 point)
How does the euglena differ from the paramecium?
Question 20 options:
Euglena are photosynthetic.
Paramecia use flagella to move.
Paramecia have an "eye spot" to detect light.
Euglena have both a macronucleus and a micronucleus
Question 21 (1 point)
Which organism is likely to live on the stump of a dead tree in a cool, moist, shady forest?
Question 21 options:
Diatoms
Euglena
Mushrooms
Paramecium
Question 22 (1 point)
Compare this fungus with the protist shown in the images below. How do they differ in the way they obtain nutrients?
Question 22 options:
Both organisms are autotrophs. The mushroom uses hyphae to get its nutrients and the amoeba uses the pseudopod instead.
Both organisms are consumers. The amoeba engulfs its food with it;s pseudopod, while the fungus absorbs food from the dead leaves using its hyphae.
The amoeba is a producer and obtains nutrients through photosynthesis; the fungus is a consumer and is decomposing leaf litter in the forest.
Question 23 (1 point)
Euglena, amoeba, paramecium: all one-celled protists. How does the amoeba move through its environment?
Question 23 options:
cilia
flagellum
pseudopod
hyphae
Explanation:
The answer is the amoeba. because amoeba relies on hiding by mimicking exceptible cells in a plant..
PLEASE HELP!!! THERE MAY BE MORE THAN ONE ANSWER!! please zoom in to read the question better!! thank you!!!
Can someone help, u have to match defintions with pictures
Answer: The picture at row 1, column 1 goes with the definition in row 2 column 4.
The definition in row 1 column 2 goes with the picture in row 4 column 2
the definition in row 2 column 1 goes with the picture in row 2 column 2
Explanation: Thats the best I could do with the image
I hope this works for you
What is a potential risk of a long-term stationary front?
A. tornadoes
B. flooding
C. hurricanes
D. drought
Answer:
B
Explanation:
Plzzzzz help A teacher looks at his students test to see which topics his students are still struggling with. What is this a Observational Study or Survey or Experiment?
Answer:
observational study
Explanation:
Answer:
hello
the answer is observational study