Answer:
True
Explanation:
If an ice cube melted, The amount of water in the ice cube would not be more or less than the water left over from when the ice cube melted. Mass must always stay the same, it cannot be created or destroyed. If a change in state ever occurred and there is more or less mass, the experiment was either contaminated or not kept in an air tight container. Chemicals can dissipate into the air and other chemicals not originally in the reaction can be unintentionally mixed in, fluctuating the level of mass and volume.
Why is the Huronian Supergroup rock formation particularly interesting to scientists?
A .because it looks like a cross-section of a giant, stone encyclopedia
B .because it formed during the period when oxygen began to accumulate in the atmosphere
C .because it contains unusually large amounts of oxygen and sulfur
D .because it formed during the period when oxygen began to accumulate in the atmosphere
Answer:
B and D are the same answer..
It's B and D I suppose either one works
Explanation:
B. Because it formed during the period when oxygen began to accumulate in the atmosphere.
What is Huronian Supergroup rock formation?The Huronian Supergroup is a rock formation that formed about 2.4 billion years ago, during the Huronian Era of Earth's history. This period is particularly interesting to scientists because it marks the time when oxygen began to accumulate in the Earth's atmosphere.
Prior to this, the Earth's atmosphere was mostly composed of methane, ammonia, and other gases, and the development of oxygen in the atmosphere represented a major turning point in the evolution of life on Earth. As a result, the Huronian Supergroup and other rock formations from this period are of great interest to scientists studying the early history of the Earth and the development of life on our planet.
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A body of air in the atmosphere that has mostly constant temperature, humidity, and pressure is…
A. Cold Front
B. Weather
C. Atmosphere
D. Warm front
E. Air Mass
Answer:
E. Air Mass
Explanation:
The definition of an air mass is "a body of air with horizontally uniform temperature, humidity, and pressure."
Answer:
E. Air Mass
Explanation:
You look under a microscope at an unknown organism and you observe 24 homologous pairs of chromosomes. What type of cell are
you observing and how do you know?
Answer:
Eukaryotic cell
Explanation:
In the given question, when the chromosomes were observed, the number of chromosomes was found to be 48 but are present in the homologous pairs that are 24 pairs are observed.
Since the chromosomes are observed as a homologous pair which is a characteristic feature of a eukaryotic cell. The prokaryotic cells just possess one chromosome which is circular in shape.
Since the observed cell possesses the chromosomes as homologous pairs, therefore the cell is a eukaryotic cell.
is xeroderma pigmentosum dominant
Answer:
XP is autosomal recessive, with at least nine specific mutations able to result in the condition. Normally, the damage to DNA which occurs in skin cells from exposure to UV light is repaired by nucleotide excision repair. In people with xeroderma pigmentosum, this damage is not repaired.
Explanation:
Answer:
XP is autosomal recessive, with at least nine specific mutations able to result in the condition. Normally, the damage to DNA which occurs in skin cells from exposure to UV light is repaired by nucleotide excision repair. In people with xeroderma pigmentosum, this damage is not repaired.
Explanation:
In the nitrogen cycle, which organisms are responsible for converting ammonia into nitrates that can be used by plants?
A) nitrogen-fixing cycle
B) decomposes
C)nitrifying bacteria
D) denitrifying bacteria
In the nitrogen cycle, Nitrifying bacteria is responsible for converting ammonia into nitrates that can be used by plants. So, the correct option is (C).
What is Nitrogen cycle?The nitrogen cycle is defined as the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates in atmospheric, terrestrial and marine ecosystems where nitrogen is fixed through both biological and physical processes.
The processes which participate in the cycling of nitrogen through the biosphere:
(1) Nitrogen fixation,
(2) Decay
(3) Nitrification
(4) Denitrification.
The nitrifying bacteria convert ammonia to nitrites or nitrates where the Ammonia, nitrites, and nitrates are all fixed nitrogen and can be absorbed by plants.
Thus, in the nitrogen cycle, Nitrifying bacteria is responsible for converting ammonia into nitrates that can be used by plants. So, the correct option is (C).
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Which of the following steps of the water cycle is the only step that has to have living organisms in
order to happen?
A. Transpiration
B. Condensation C. Evaporation D. Preci
Answer:
A. Transpiration
Explanation:
Transpiration is the process of water evaporating from the leaves of plants through holes on the underside of the leaf.
Final answer:
In the water cycle, transpiration (Option A) is the only step that requires living organisms, as it involves water movement through plants and out to the atmosphere.
Explanation:
The step of the water cycle that requires living organisms to occur is transpiration.
This process involves plants absorbing water through their roots, which then moves up through the plant and eventually evaporates from the leaves into the atmosphere. Unlike condensation, evaporation, and precipitation, transpiration specifically involves the biological process of plants.
While condensation is the process of water vapor cooling to form liquid water droplets and precipitation is the water droplets falling from the atmosphere as rain, snow, sleet, or hail, these do not require living organisms to happen. Therefore, the correct answer to the question is A. Transpiration.
Which of the phrases from the paragraph is an example of a simile?
A. "Charlene fished beside her dad from their little rowboat."
watching the orange floater as it bobbed gently."
C the fish fighting as hard as a boxer in the ring"
D. "Suddenly, the floater disappeared beneath the wife
Answer:
I’m pretty sure its C. The fish fighting as hard as a boxer in the ring.
I hoped this helped :)
The phrase 'the fish fighting as hard as a boxer in the ring' is a simile, as it uses comparison between two different things using 'as' to emphasize the effort of the fish.
Explanation:
In this case the phrase that is an example of a simile from the paragraph provided is 'the fish fighting as hard as a boxer in the ring'. A simile is a figure of speech that makes a comparison between two unlike things using words like 'as' or 'like', and this phrase fits that definition. The phrase compares the struggle of a fish to the determined effort of a boxer fighting in a ring. Here, the fish's effort is emphasized through the comparison to a professional athlete. Therefore, looking out for such phrases can assist in identifying similes in text.
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What type of wave do ocean waves represent?
Surface Waves
Explanation:
A surface wave is a wave in which particles of the medium undergo a circular motion.
Answer: Surface Waves
Explanation:
20 POINTS AND BRAINLIEST QUICK I AM TIMED
What symbol would best represent an electric fan in an electric circuit?
The second symbol would best represent an electric fan in electric circuit.
Explanation:The first symbol represents an open circuit, the third is a resistor, and the fourth is a battery. That leaves us with only one option--the second one.
Answer:
c
Explanation:
Based on the information of the graph , which regions population will change the least in the next 40 years?
A -Oceania
B -africa
C-United states
D-Europe
Answer:
D. Europe
Explanation:
Provitamin A, also known as beta-carotene, is necessary for human health. People who do not make this substance suffer serious medical
problems. Which application of genetic technology has been the MOST promising for treating people who suffer from a deficiency of provitamin
A?
A
Developing transgenic bacteria that can break apart provitamin A
B. Developing gene therapy to eliminate the body's need for provitamin A
C. Developing GM foods that produce and store provitamin A
D. Altering the processes of transcription and translation used for provitamin A synthesis.
Answer: C
Explanation:
i just took a quiz and that was the correct answer
When warm moist air over the oceans rises rapidly, condenses and forms clouds, which releases latent heat that then increases the force of the rising air a _________________ is formed. *
A) Hurricane
B) Tornado
C) Thunderstorm
Why did mosquitoes develop resistance to DDT?
A. Because it was killing them so they had to do something!
B. The government reduced their use of DDT after the book Silent Spring and the mosquitoes used the time to develop defenses against DDT.
C. The ones which had a genetic variant that was tolerant of the DDT survived and reproduced.
D. The nuclear DNA mutated and some individual mosquitoes developed resistance.
Mosquitoes developed DDT resistance through natural selection, where mosquitoes with a genetic variation that allowed for DDT tolerance survived and reproduced, passing these advantageous genes to their offspring. Therefore, the correct answer is option C. The ones which had a genetic variant that was tolerant of the DDT survived and reproduced.
The development of DDT resistance in mosquitoes is a clear example of natural selection at work. The correct answer to why mosquitoes developed resistance to DDT is C. The process works as follows: when DDT was widely used, it killed off a large proportion of the mosquito population; however, within any population, there is genetic variation. During this selection process, only mosquitoes with a genetic variant tolerant of the insecticide survived and passed on their genes to the next generation. Over time, these resistant individuals became more prevalent. This explanation is rooted in biology, specifically genetics and evolution.
To elaborate, female mosquitoes did not purposely choose to mate with resistant male mosquitoes to ensure fit offspring. Resistance developed because of a natural genetic variation that provided some mosquitoes with a survival advantage in a DDT-rich environment. Similar resistance patterns have been observed in Plasmodium, the protozoan that causes malaria, which has become resistant to anti-malarial medicines due to over-prescription and subsequent selection pressures. The outcome of such adaptations is an increase in the proportion of individuals with the advantageous traits in a population.
What component of Earth's atmosphere exists entirely as a result of photosynthesis?
OOOO
oxygen gas
water vapor
nitrogen gas
carbon dioxide gas
Answer:
Oxygen gas
Explanation:
Photosynthesis is where carbon dioxide, water, and sunlight are turned into oxygen, and glucose (energy for the plant). The only gas released is oxygen.
The following is a strand of DNA:
C-T-A-G-C-T-A-T-A-C-G-A-C-T
list the complementary DNA strand that would be made from this strand in DNA replication
Answer:
G-A-T-C-G-A-T-A-T-G-C-T-G-A
Explanation:
This is the complementary DNA strand that would be made. C links with G, G links with C, A links to T, and T links to A. Hope this helped :)
The complementary DNA strand for the given sequence 3'-T A C T G A C T G A C G A T C-5' is 5'-A G T G A C T G A C G T A G-3', following the base-pairing rules of A with T and G with C.
The original DNA strand given is 3'-T A C T G A C T G A C G A T C-5'. To create a complementary DNA strand during DNA replication, we need to add nucleotides that are complementary to each one on the original strand.
Here are the base pairing rules to know:
Adenine (A) pairs with Thymine (T)Thymine (T) pairs with Adenine (A)Cytosine (C) pairs with Guanine (G)Guanine (G) pairs with Cytosine (C)Using these rules, the complementary DNA strand to the given sequence, going in the 5' to 3' direction, would be 5'-A G T G A C T G A C G T A G-3'. Each original nucleotide has been paired with its corresponding partner.
Jonathon tests four people that were present during a shooting incidence. He notes that there is gunshot residue on all but two of the people, the victim
and another person. What might he conclude about the person with no gunshot residue on his hands or clothing?
O A. The person was next to the shooter.
OB. The person was the shooter.
Oc.
The person was not the intended victim.
OD.
The person was not beside the shooter.
O E.
The person struggled with the shooter.
Final answer:
Given the absence of gunshot residue on one individual besides the victim at the scene, the most likely conclusion is that this person was not beside the shooter when the gun was fired. D. The person was not beside the shooter is correct.
Explanation:
When Jonathan discovers that gunshot residue is absent on one of the people at the shooting scene, it suggests a few possibilities, but with the options provided, one stands out. Given that the victim also didn't have gunshot residue, it's reasonable to infer that someone not involved with the gunfire itself would likely be free from residue. Therefore, the absence of residue on another individual could indicate that they were not in proximity to the shooter when the gun was discharged. Interpreting evidence requires careful thought and consideration of all potential scenarios.
The most fitting conclusion from the given options is that this person was not beside the shooter. This would be consistent with the expectation that someone standing close to the shooter might have residue on them from being in close vicinity to the fired weapon. Hence, the correct option is:
OD. The person was not beside the shooter.
Practice 1: What is so important about DNA? Select all correct answers.
A. DNA is found in all organisms and carries instructions to build those organisms
B. DNA found in one organism probably shares similar instructions found in another species
C. DNA is composed of only four bases that repeat in a sequence that is different for each species
D. Some organisms don’t actually have DNA
E. The DNA of each organism is made out of different types of chemical
Answer: A B C
Explanation: I did this and got it correct!
Which of the following causes the most problems in countries with low economic growth?
poor education
low unemployment
higher standard of living
rapid population increas
Answer:
The 4th one (D) Rapid Population Increases
Explanation:
on edge 2020
The rock particles that make up soil come from parent bedrock. Weathering breaks bedrock into smaller and smaller pieces. The characteristics of any soil depend mostly on the type of parent bedrock. Just like you have characteristics that are like your parents, soils have characteristics that are like those of the parent bedrock. Take a look at the soil textural triangle. Soil particles are classified by size; sand particles are the largest and clay particles are the smallest. Most soils are some mixture of these three particles.
Imagine that a soil is 85% composed of weathered sandstone. Over time, a river flowing over the bedrock deposits sand and a very small amount of clay. By using the soil textural triangle, scientists have decided that the soil is mostly likely
A) silt loam.
B) clay loam.
C) loamy sand.
D) sandy silt loam.
The soil in question is option C - loamy sand.
Loamy sand is a soil composition dominated by sand particles, with a small amount of clay particles. According to the soil textural triangle, loamy sand is a soil composition mostly consisting of sand particles (the largest particles) and a smaller amount of clay particles (the smallest particles). The 85% composition of weathered sandstone indicates a high concentration of sand, making loamy sand the most appropriate classification.
The soil textural triangle classifies soils based on their composition of sand, silt, and clay. Each corner of the triangle represents 100% composition of one of these particles: sand, silt, or clay.
Given that the soil is 85% composed of weathered sandstone,
It means that the dominant particle size in the soil is sand. Locate the point on the triangle where the sand percentage is approximately 85%. This point falls within the loamy sand region.The soil's composition aligns with the characteristics of loamy sand, which is a mixture of sand and a small amount of silt or clay. Therefore, the soil is mostly likely loamy sand.
As countries develop, do they have more or less of an impact on the planet?
Answer:
More impact on he planet.
Explanation:
The reason why is because there will be more population and cutting down of trees and pollution
Most plants and animals require food and oxygen toi live. Plants and anmals primarily use the oxygen to convert their food into A. cells. B. carbon dioxide. C. blood. D. energy.
Answer:
Energy
Explanation:
ASAP!! I WILL MARK YOU BRAINLIEST!!! JUST THE ANSWER!!!
The key role of decomposers in an ecosystem is to make ______ available to plants.
a
energy
b
proteins
c
nutrients
d
carbohydrates
Answer:
C .nutrients
Explanation:
Answer: C Nutrients
Hungaaroons can have straight hair, wavy hair, or curly hair. Straight hair is caused by having two of the same allele (SS). Curly hair is the results
of having two curly hair alleles (CC), Wavy haired individuals are heterozygous. What type of inheritance pattern does this trait follow?
Answer:
Wavy haired would be SC, seeing as it is "heterozygous," meaning it has one of each allele. This is called incomplete dominance, where neither allele is expressed fully over the other.
What is the name of the “thing” that has antigens on its surface? Where are antigens found on these “things”?
Answer:
On the surface of red blood cells
Explanation:
Antigens are found on the surface of the red blood cells and are ignored by the immune system but antigens of another blood type are seen as foreign and attacked by antibodies
WILL AWARD BRAINLIEST!!! Mendelian Genetics
Question 3
Homozygous describes -
a. two of the same alleles that express a trait.
b. the passing of traits from parent to offspring.
c. two different alleles that express a trait.
d. an allele that is hidden by another.
Question 4
A _____________________________ allele is hidden by the presence of another allele that is represented by a lowercase letter.
a. Dominant
b. Heterozygous
c. Phenotype
d. Recessive
Question 5
An organisms set of genes that are representd by letters is -
a. Phenotype
b. Heterozygous
c. Genotype
d. Alleles
Question 6
An allele is -
a. expressed while it hides another.
b. two of the same in order to express a trait.
c. a diagram that predict genetic outcomes.
d. different gene choices for a trait.
Question 7
This allele tends to hide the presence of another allele, is expressed most often and is represented by a capital letter.
a. Recessive allele
b. Dominant allele
c. Heterozygous allele
d. Genotypic allele
Question 8
The characteristics that are physically expressed is/are known as it's -
a. Homozygous
b. Gene
c. Allele
d. Phenotype
Answer:
Question 3. C
Question 4. D
Question 5. C
Question 6. D
Question 7. B
Question 8. D
I didn't do this test, but I'm really good with genetics, so I hope this helps! good luck!!
Mendel's genetics has the laws that help to determine the characters of various chromosomes expression and the expression mechanisms. The same genes present on the allele is called as homozygous and the different ones are called as heterozygous.
What is the dominant allele ?
It is the set of genetic expressions which express themselves in the genotype or phenotype of the individual.
Homozygous describes two of the same alleles that express a trait. That means the same of alleles that are controlling a single and same expression. The another one in which a different set of chromosomes are present are called as heterozygous.
Recessive allele is hidden by the presence of another allele that is represented by a lowercase letter where the capital letter is called as a dominant trait expressing gene.
An organisms set of genes that are represented by letters is called as genotype. It is controlling the genetic expression of an individual.
An allele is -expressed while it hides another. It is the expression where one of the allele is getting expressed and the another one is not terming them as dominant and recessive.
This allele tends to hide the presence of another allele, is expressed most often and is represented by a capital letter. It is the dominant gene.
The characteristics that are physically called as phenotype that control the physical features along with the physical expressions of an individual.
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Flagellates are microbes that have a rod-shaped flagellum that helps with their locomotion. Certain flagellates reside inside termites. These flagellates provide enzymes for the termites to digest cellulose, which helps them survive. In turn, the termites provide nourishment to these flagellates. Termites need cellulose for their survival, and flagellates obtain nutrition only from termites. Which statement can be true about the association between these microbes and termites?
A.
The flagellates share a facultative mutualistic association with the termites.
B.
The flagellates and termites share an obligate mutualistic association.
C.
The flagellates share an obligate parasitic association with the termites.
D.
The flagellates and termites share a commensal association.
E.
The flagellates and termites share a facultative parasitic association.
Answer:
B.
The flagellates and termites share an obligate mutualistic association
Explanation:
Organisms of same or different species tend to interact with one another in an ecosystem. The close interaction between two organisms is referred to as SYMBIOSIS. A type of symbiotic relationship is MUTUALISM, which is when both organisms benefits from the relationship.
However, mutualistic relationship can be of different types depending on how dependent the involved organisms are on each other. The example in this question illustrates OBLIGATE MUTUALISM, which is when the organisms involved in the mutualistic relationship depend on one another for survival. This is the case of the termites and the flaggelates where the termite depends on the flaggelate for enzymes that helps them digest cellulose while the flaggelates depend on termite for nourishment/food.
The termite will not survive if it doesn't get enzymes to digest its cellulose while the flaggelates will also not survive if they do not get nourished. Hence, the two organisms share an OBLIGATE MUTUALISTIC RELATIONSHIP.
Termites and flagellates have an obligate mutualistic relationship where the flagellates digest cellulose for the termites, and termites provide habitat and food for the flagellates.
Explanation:The association between termites and flagellates is described as an obligate mutualistic relationship. In this symbiosis, both parties are entirely dependent on each other to survive. The flagellates aid in the digestion of cellulose which is the primary food source of the termite. These protozoans possess bacteria that produce an enzyme called cellulase which is necessary for the breakdown of cellulose into sugars the termite can absorb. Conversely, the flagellates depend on the termites to provide them with a safe habitat and consistent food supply derived from the cellulose-rich wood that termites consume.
Why does Ocean City MD. have warmer winters than Sterling VA?
Final answer:
Ocean City, MD experiences warmer winters than Sterling, VA due to its proximity to the ocean, which moderates temperatures through the process of oceanality, while Sterling experiences more extreme temperature fluctuations due to continentality.
Explanation:
The reason Ocean City, MD has warmer winters than Sterling, VA can be attributed to the phenomenon known as oceanality, which is influenced by the proximity to the coast and the regulation of temperature by the ocean. In contrast, Sterling, VA experiences more continentality, which results in greater temperature fluctuations. The ocean impacts temperature on nearby coasts by warming the air in winter and cooling it in summer because water has a high heat capacity and changes temperature more slowly than land.
Oceans and large bodies of water like the Atlantic Ocean near Ocean City moderate temperature because they absorb heat during the warmer months and release it during the cooler months. This creates a milder climate with less extreme temperatures compared to inland areas. As Sterling, VA is located further inland, it lacks this moderating influence and thus experiences colder winters.
What is the function of heart valves?
They return blood to the heart.
They force blood to flow out of the heart.
They regulate the heart rhythm.
They prevent blood from flowing backwards.
Answer: EDUCATED GUESS
Explanation:
They regulate the heart rhythm.
Heart valves prevent blood from flowing backwards, ensuring unidirectional flow that is essential for effective blood circulation throughout the body.
Explanation:The function of the heart valves is crucial for the cardiovascular system, as they prevent blood from flowing backwards by ensuring unidirectional flow through the heart. There are four valves in the heart: the tricuspid valve, the pulmonary valve, the mitral valve, and the aortic valve.
These valves open to allow blood to move forward and close to prevent it from leaking back into the chamber it came from. This action is vital as it maintains the efficiency and pressure necessary for blood to reach all parts of the body. The unidirectional flow is necessary for efficient circulation, ensuring that oxygen-rich blood reaches the systemic circulation and deoxygenated blood reaches the lungs for oxygenation.
The retinal cells responsible for night vision are:
photoreceptors
rods
fovea
With increased altitude how does the density of the atmosphere change?
remains the same
fluctuates
increases
decreases
Answer:
increases
Explanation: