What economic system is characterized by an exchange of one product for another
currency
barter
loan
free market
• What is the difference between center of mass and center of gravity?
Answer:
Center of mass is the point where distribution of mass is equal in all directions, and does not depend on gravitational field. Center of gravity is the point where distribution of weight is equal in all directions, but unlike center of mass, it does depend on gravitational field.
What’s air, water, and soils role in the carbon cycle
Answer:
They are reservoirs of carbon in the carbon cycle.
Explanation:
A biogeochemical or nutrient cycle has two major components:
the reservoirs of the biogeochemical or nutrient, andthe processes involved in cycling the biogeochemical or nutrient between the reservoirs.Air is a reservoir of largely inorganic carbon (as carbon dioxide) while water and soils are reservoirs of both organic (e.g. dead decomposing organisms and hydrocarbons) and inorganic forms of carbon (e.g. carbon-containing minerals such as limestone, calcium carbonate).
The diagram provided shows the carbon and nitrogen flow through a man-made mussel bed in the ocean. What evidence would support the law of conservation of mass for this ecosystem?
A. A The amount of carbon and nitrogen removed during harvest equals the amount seeded as biomass.
B. B Carbon and nitrogen enter and leave the ecosystem only through man-made processes.
C. C The mass of scavengers, decomposers, and feces equals the mass absorbed from phytoplankton and detritus.
D. D The total amount of carbon and nitrogen entering the ecosystem equals the total amount leaving the ecosystem.
Answer:
c
Explanation:
In the classification of organisms by kingdom, all prokaryotes are grouped together in the kingdom Monera. Genetic research, however, led to the separation of prokaryotes into two domains, Archaea and Eubacteria. Which of the following best describes similarities between Archaea and Eubacteria?
Both can undergo binary fission and are autotrophs.
Both are able to withstand extreme temperatures and lack of oxygen.
Both have single-stranded, helical DNA and cell walls.
Both lack membrane-bound organelles and are single-celled.
Answer:
D. Both lack membrane-bound organelles and are single-celled.
Explanation:
All prokaryotes are classified in two domains Archaea and Eubacteria as they differ in some characteristics. But as they both are prokaryotes there is some similarities between Archaea and Eubacteria that is they both are single celled and lack membrane-bound organelles.
They both reproduce asexually by binary fission but both are autotrophic and heterotrophic. They both are unable to survive in lack of oxygen. They both have circular DNA and not helical DNA.
Hence, the correct option is D.
Answer:
Both lack membrane-bound organelles and are single-celled.
Explanation:
Could two humans have some differences caused by mutation in their DNA sequences for insulin, yet still make the exact same insulin proteins? Question 7 options: No, DNA is very precise and only one specific sequence will produce insulin No, each person's DNA is unique and will make a unique insulin protein Yes, different codons can code for the same amino acid.
Answer: Yes
Explanation:
Two humans have some differences caused by mutations in their DNA sequences for insulin, yet they still make the exact same insulin proteins, and this is true. The correct answer is yes; different codons can code for the same amino acid, which is the last option.
What are DNA and genetic code?The genetic code is the set of rules by which the nucleotide sequence of a DNA molecule is translated into the amino acid sequence of a protein. A codon is a sequence of three nucleotides that specifies a particular amino acid. There are 64 possible codons but only 20 amino acids, so the genetic code is degenerate or redundant. This means that different codons can code for the same amino acid.
Hence, two humans have some differences caused by mutations in their DNA sequences for insulin, yet they still make the exact same insulin proteins, and this is true. The correct answer is yes; different codons can code for the same amino acid, which is the last option.
Learn more about DNA here.
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the function of chloroplasts in plant cells is to
A. Obtain water
B. Digest carbohydrates
C. Package proteins
D. Absorb sunlight
Answer:
d. absorb sunlight
Explanation:
i know
Imagine you are a member of a scientific committee that is working on writing a set of ethical standards for cloning research. What are some of the most important concerns you would want to have covered by those standards?
If you were a beef producer, how would you view the cloning of cattle that is now possible? List any resources you used to answer this question.
Answer:
Here are some points you could use
1) Safety of the original clone
2) Any chemicals used that could result in defects in the clone or original
3) Will clone contain chemicals that can affect the consumer of beef
4) Will clones be able to reproduce with other clones or non-clones and will that result in birth defects?
5) Exlusive technology not to be available to the public, only for research
6) Can this tech be used to clone humans for organs
Explanation:
When wax is heated, it turns into a liquid. How are the wax molecules affected by this change of state?
Answer:
the molecules gain energy
Explanation:
The dodo bird used to be found in high populations on their island habitat. However, sailors would stop by the island to eat the dodo birds because they were easy to catch. Eventually, the dodo population went extinct.
This is an example of biodiversity loss due to:
Overpopulation
Invasive Species
Habitat Destruction
Overexploitation
Answer:
Overexploitation
Explanation:
Gradual declination of certain species of organisms in an ecosystem, which leads to their extinction occurs from time to time. This is referred to as the loss of biodiversity or simply biodiversity loss. Many factors contribute to the loss of biodiversity in an ecosystem, they include: habitat loss, invasive species, overexploitation etc.
Based on the description of the cause in this question, the biodiversity loss is as a result of OVEREXPLOITATION. Overexploitation is when certain animals are utilized more than the surviving ones can reproduce to cover the loss.
In this case, the sailors overexploited the dodo birds in their island habitat by feeding on them excessively because they were a easy catch.
What type of consumer is the hawk?
Answer:
secondary tertairy your welcome lol xD
Explanation:
Which type of RNA is transcribed from DNA and contains the code for polypeptide formation?
Answer:
mRNA (messenger RNA)
Explanation:
mRNA is transcribed from DNA (a process called transcription) where the mRNA acts as a blueprint to build proteins aka polypeptide formation.
How has human activity impacted the evolution of the peppered moth?
Answer:
Most peppered moths used to be grey with dark spots, but have evolved to be mostly black. This is because pollution from the Industrial Revolution threw soot on the trees causing them to look black. This gave the black moths camouflage from predatory birds meaning they survived and reproduced. By survival of the fittest, the peppered moths became black like the trees.
Explanation:
Which of the following is true about scientific knowledge?
It never changes.
It is durable.
It is based on opinion.
It is untested.
Answer:
B
Explanation:
It is durable
Answer:
B. It is durable.
Explanation:
Scientific knowledge can change because it is often examined and re-examined by new investigations and scientific argumentation. Because of these frequent examinations, scientific knowledge becomes stronger, leading to its durability.
I am a type of leukocyte that comes from monocytes. I help to eat bacteria, virus, fungi, and parasites. What am I?
Answer:
WBC
Explanation:
How do you explain that the variability in a domesticated species is greater than in the same species, or a similar one, in the wild? For example: dogs vs. wolves; chickens vs. red jungle fowl.
Explanation:
i believe it is because the domesticated breeds were bred specifically through generations in order to serve a specific purpose, for example dogs could be bred for hunting or herding, etc and chickens could be bred for eggs or meat, etc. but in the wild, their only job is to survive and reproduce.
Which of the following MOST influenced the growth in the human population over the last century?
(A) Farmers have developed new crops that can grow in various climates and with small nutrient input.
Mechanical and chemical technologies have been developed to greatly increase agricultural production.
(C) The development of chemical fertilizers has enabled farmers to grow more intensive staple crops.
(D) Access to new freshwater resources has greatly expanded the use and efficiency of irrigation systems.
Answer:
A)
the agricultural development allowed people to have plenty of food which allowed them to live a healthy and plentiful life soon increasing human reproduction and soon the population.
____is the pigment that is used to make glucose in photosynthesis.
Answer:chlorophyll
Explanation:
Biology, Plant-Life Select all that apply (image below)
30. Which of the following statements is TRUE about protein? (1 point)
The more protein and protein supplements you eat, the more muscle you will gain or maintain
q Excess protein is stored by the body as fat.
ChExcess proteins are stored as amino acids in the muscle tissue.
O Protein is the primary source of energy for the body
Answer:
The answer is B
Sorry if Im wrong but I think it's write
Explanation:
The statement which is true about protein is: B. Excess protein is stored by the body as fat.
Protein can be defined as a macromolecule which is formed due to the union of many amino acids. Also, the two (2) main functions of protein include the following:
The enzymatic catalysis of glycolysis.To help in the growth of a living organism.Generally, the excess protein (amino acids) that are taken in by a living organism cannot be stored in the body. Thus, it is usually converted into carbohydrates or fats and then stored in the body.
In conclusion, the statement which is true about protein is that excess protein is stored within the body of a living organism as fat.
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I NEED HELP PLEASE
__________ eat __________, and __________ get nutrients from both after they die.
A.
Consumers; producers; decomposers
B.
Producers; consumers; decomposers
C.
Producers; decomposers; consumers
D.
Decomposers; producers; consumers
Answer:
consumers, producers, decomposers
Explanation:
Study Island pretest
Consumers eat producers and decomposers get nutrients from both when they die.
What do you mean by consumers?A food chain consumer is an organism that eats organisms from different populations. The consumer is a heterotroph and the producer is an autotroph.
Organisms that eat producers are primary consumers. They are usually small and numerous. The main consumers are herbivores (vegetarians).
Consumers play an important role in the ecosystem by regulating the population growth of organisms and supplying energy to other organisms. Removing any species, producer or consumer from an ecosystem can destabilize the ecosystem.
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Classifying Organisms
PLZ HELP ME ILL GIVE YOU BRAINLIEST AND 20 POINTS PLZ DONT GIVE ME A FAKE AWNSER
Answer:
Domain: Eukarya – membrane-bound nucleus.
Kingdom: Animalia – multicellular organisms, consumes food.
Phylum: Chordata – backbone with spinal cord.
Class: Mammalia – nurses babies.
Order: Primates – larger brains compared to other animals of the same size.
Family: Homindae – upright posture.
genus “Home Sapiens
spieses human
Explanation:
mark brainlest hope it helps
Answer:
Domain: Eukarya – membrane-bound nucleus.
Kingdom: Animalia – multicellular organisms, consumes food.
Phylum: Chordata – backbone with spinal cord.
Class: Mammalia – nurses babies.
Order: Felidae – Cats
Family: Panthera – Big Cats
Genus: Panthera Tigris
Species: Tiger
Explanation:
im doing it for the points so give the other person the brainliest
What conditions can cause a population to grow
Answer:
Causes of population growth include high birth rate, low infant mortality, increased food production and improvement of public health.
Answer:
birth rate, death rate, immigration, and emigration.
Explanation:
These all can cause and population to grow
How can radio-frequency produce heat?
Answer:
Radio frequency is short for RF, which is a kind of high frequency alternating current electromagnetic wave with frequency range from 3k hz-3k GHz
Because the frequency is high, so the molecular movement speed is fast, and the physical explanation of the heat of the object 100 is its internal molecular movement speed, the use of radio frequency energy to make the molecular high speed movement of course will achieve the purpose of heating
Answer:
Radiofrequency (RF) radiation, which includes radio waves and microwaves, is at the low-energy end of the electromagnetic spectrum. It is a type of non-ionizing radiation. ... If RF radiation is absorbed in large enough amounts by materials containing water, such as food, fluids, and body tissues, it can produce heat.
In 2007, New York City attempted to install a commercial wave farm
underneath the East River. Why did it fail?
Answer:
Because of the fact that it was very Deep and heavily polluted.
Explanation:
Actual main channel depths along the river vary; with a least depth of 24' or less at a few locations at the channel edges to a maximum depth of 108' being found mid-channel at the southern approach to Hell Gate.
Due to heavy pollution, the East River is dangerous to people who fall in or attempt to swim in it, although as of mid-2007 the water was cleaner than it had been in decades.
How does a dinosaur become a fossil. Please at least 3 sentences.
Answer:
To show you how dinosaurs became fossils, here is a normal fossilization: The dinosaur dies and is washed away in a flood. The body is buried in sediment (mud or sand) and eventually the body is covered. The soft parts of the body are destroyed leaving only bones.
Explanation:
please help,, will mark brainliest
I think its 25% but hope this charts help you bc It help me
Words Fraction Decimal Percent
1 out of 4 1/4 0.25 25%
2 out of 4 2/4 or 1/2 0.50 50%
3 out of 4 3/4 0.75 75%
4 out of 4 4/4 1.0 100%
Srry if its messy
The body’s nonspecific defenses against invading pathogens include
Answer:
anatomic barriers, inhibitors, phagocytosis, fever, inflammation, and IFN
Explanation:
If the conditions of the environment change so that a population is no longer adapted to the environment that population will most likely
Answer:
That population will most likely die off.
14. When we are too cold, these trap a layer of air for insulation. *
Hair
Mucus
Sweat glands
Capillaries