Answer:
B. No
Explanation:
Projections show that whites will decline; the number of old people will increase; and racial minorities, mainly Hispanics, will grow the most, making them the main engine of demographic change in the U.S. for the next 10 years and beyond.
Today, there are over 74.1 million people under age 18 in the U.S. country. There are 56.4 million people age 65 and older.
Ten years from now, there will almost be as many old folks as there are young ones. The numbers of young people will have grown just a little to 76.3 million, but the numbers of old people will have increased a lot – to 74.1 million. A lot of these new elderly will be baby boomers.
The illustration shows structures into animals these are known as??? helpp
Which of the following DOES NOT cause a mutation?
Environmental factors such as radiation and chemicals
Infectious agents like viruses and bacteria
Spontaneous mutations
Pure water
What does "repel" mean?
O Magnets do not have magnetism
O Magnets pel for a second time
Magnets move toward each other
Magnets move away from each other
Answer:
D. Magnets move away from each other
Explanation:
be repulsive or distasteful to.
bug repellent
a repellent attitude
Answer:
magnets move away from each other
How do you think acid rain is forming
Answer:
acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide
Look at this picture. Is this bird about to become this predator’s lunch? What do you think is happening in this photo?
Answer:
I don't think it is becoming the predator lunch. there are some birds who will clean the teeth
Which of the following conclusions can be made from this experiment?
Explanation:
what experiment....??
Why do scientists compare the DNA of bananas, worms, fruit flies, and humans? How can this information be helpful?
Scientists compare the DNA of bananas, worms, humans, etc., by aligning homo-logous sequences, which is useful to discover gene function and infer evolution.
What is sequence homo-logy?The expression sequence homo-logy makes reference to the similarity between nucleotide sequences due to the same evolutionary origin.
In genetics, nucleotide sequences are aligned to infer sequence homo-logy.The sequence homo-logy may result useful to discover gene function and determine evolutionary relationships.In conclusion, scientists compare the DNA of bananas, worms, humans, etc., by aligning homo-logous sequences, which is useful to discover gene function and infer evolution.
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Two balloons are rubbed with fur, which creates an excess of electrons on the balloons. If the balloons are hung from flexible wires from a shared point overhead, what will happen to the balloons?
A.
They will repel one another and the angle between them will be proportional to the charge on each.
B.
They will attract one another and sustain that attraction until the charges have redistributed.
C.
They will swing like a pendulum, with the period based on the magnitude of the transferred charge.
D.
They will join at a single point where the excess charge has collected and then they will repel one another.
What are Cyanobacteria ?
Explain biological principles behind preservation of meat by refrigeration
Answer:
yes because at the room temperature the bacteria and fungi grow but in the refrigerator the temperature is lower than the room temperature which is not sufficient for growing microbes due to which we preserve in refrigerator.
I hope u understand
Describe in one paragraph the importance of carbohydrates. (5-8 sentences)
Answer:
Carbohydrates are the body's main source of energy. Without carbohydrates, your body will use up fat and protein in place of carbohydrates. These other sources of energy are harder to use. Carbohydrates provide energy for everything you do, whether it be running or breathing. Carbohydrates also provide important fiber for protection against disease. Extra carbohydrates (not used for energy), broken down as glucose, can be converted to glycogen, which is important for good muscle and liver health.
Explanation:
Hope this helps! :)
Which occurs just before a volcanic eruption?
Lava flows onto the sides of the volcano.
The expanding gases push magma through the pipe.
A pocket of magma forms beneath the volcano.
New rocks are formed as lava hardens.
Answer:
The expanding gases push magma through the pipe.
Explanation:
The activity that happens before the volcanic eruption is the expanding gases pushing magma through the pipe.
What do you mean by Volcanic eruption?A volcanic eruption may be defined as an activity that is responsible for an opening in the earth's crust through which lava, volcanic ash, and gases exit.
Before the volcanic eruption, several gases create an extreme pressure that efficiently pushes the magma through the pipe which leads to the flow of lava onto the sides of the volcano.
Therefore, the correct option for this question is B.
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The genetic code is the set of instructions that
translates genetic material into proteins. This code
defines how sequences of three nucleotides specify
which amino acid will be added next during protein
synthesis. Each sequence of three nucleotides is called
A. a protein
B. a codon
C. a Mutagen
D. a DNA molecule
Answer:
DNA molecule
Explanation:
Each sequence of three nucleotides is called a codon. Therefore, the correct answer is option B.
Codons are named by the request for their bases. The three stop codons in mRNA are UAA, UAG, and UGA, where U represents uracil, A for adenine, and G for guanine. Stop codons signal the end of protein synthesis. They can be found in DNA or mRNA.
They are three-nucleotide sequences that encode a particular amino acid. During the translation process, the tRNA (transfer RNA) molecules contain anticodons that aid in the transfer of amino acids to the mRNA.
A codon is a sequence of three nucleotides in DNA or RNA, also known as a trinucleotide. It is a unit of genomic information that encodes a specific amino acid or signals the end of protein synthesis (stop signals).
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describe in your own words the cycle of an ecosystem
Answer:
An ecosystem is where there are many organisms such as plants and animals also including weather and landscape. Ecosystems have biotic and abiotic things . Ecosystems can be very large or very small.
Explanation:
PLEASE HELP PLEASE PLEASE PLEASE
Answer: B
Explanation: This should be the correct answer(: since hereditary means passing genetical material/information from parent to offspring (one gerneration to another)
Your teammate is spinning a tennis ball on a string in a perfect circle. If the radius of the circle is 45 cm and the ball travels half the
circumference of the circle in 15 seconds, what is the velocity of the ball rounded to the nearest whole number?
A
3 m/s
B)
30 cm/s
94 cm/s
D)
212 cm/s
Answer:
94 cm/s
Explanation:
The velocity of an object in circular motion is the distance traveled over time. The distance traveled is the circumference. Half the circumference of a circle with radius r is πr. The velocity is this distance over time, in this case, 1.5 s. The ball’s velocity is therefore
πr
t
=
45π
0.5
≈ 94.2 cm/s
what's Ozone layer???
Answer:
The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.
Explanation:
hope this helps you
Plz help! In a density-dependent population, a decrease in which of the following will most likely cause an increase in birthrate?
Carrying capacity
Death rate
Emigration
Immigration
plz don't put link or ill report
In a density-dependent population, a decrease in the death rate will most likely cause an increase in birthrate. It is because a lower death rate means that more individuals are surviving, which can lead to an increase in the number of individuals reproducing, ultimately resulting in a higher birthrate. The correct option is B.
What is a density-dependent population?As we know that a population's birthrate tends to increase if there is a decrease in death rate, which also results in a decrease in carrying capacity.
Also, a density-dependent population is a population where the death rate increases and birthrate decreases with increasing population density, and vice versa. So, a decrease in the death rate of a density-dependent population will most likely cause an increase in the birthrate.
A density-dependent population is a population where the death rate increases and birthrate decreases with increasing population density, and vice versa. A decrease in the death rate of a density-dependent population will most likely cause an increase in the birthrate.
Therefore, the correct option is B.
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1. Which of the following elements is the LEAST abundant in living organisms?
a oxygen
b nitrogen
c phosphorous
d sulfur
Answer
Sulfur is the least abundant in living organisms.
sulfur is the LEAST abundant in living organisms among the options.
Living organisms are composed of Chemical elements which constitute the build up organelles, cells, tissues, and organs.
The Chemical elements are divided into:
Essential elements : These essential elements are 11 in number ad also subdivided into the major essential elements which make up about 99% of the human body mass. They include Oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. The remaining five (least essential elements) consists of Sulfur, potassium, sodium, chlorine, and magnesium which make up about 0.85% of the remaining mass. Trace elements:.The trace elements comprises of the remaining 0.15% of the human body is comprised of trace elements. Whether they may be essential for life, is still being researched for evidence.Arranging the essential chemical elements according to abundance in living orgasm we have:
Oxygen 65.0% of body massCarbon 18%Hydrogen 10%Nitrogen 3% Calcium 1.4 %Phosphorus 1.1% Potassium 1%SulfurChlorineMagnesiumWe can therefore conclude that from the question Sulfur is the least abundant in living organisms.
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Which substance is NOT a known carcinogen?
a) latex
b) tobacco products
c) radiation
d) sunlight
Carcinogens are the agents that cause cancer in an organism and can be man-made or natural. Latex is not a type of carcinogen. Thus, option a is correct.
What are carcinogens?Carcinogens are the substances that can be a chemical or a biological compound that are capable of causing cancers. They can be natural agents like UV rays from sun, solar radiations, or viruses or can be a man-made substance like tobacco, nicotine, fumes.
These substances are capable of causing genetic mutations by altering the genomic sequence and the nitrogenous base that affects the genotype and the phenotype. The carcinogens leads to growth of abnormal and cancerous cells. Latex is a secondary metabolite that doe not causes cancer.
Therefore, option a. latex is not a carcinogenic agent.
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Which detail in the article BEST supports the
conclusion that the 5G network is more efficient
than other cellular networks?
Answer:c
Explanation:
1. The carrying capacity for a population of deer in a forest is 300 individuals.
Which of the following is true?
A population of 300 deer will remain at about 300
A population of 100 deer will remain at about 100
A population of 500 deer will continue to grow exponentially
A population 300 deer will run out of resources and crash
The organisms found in a coral reef habitat include clownfish, seahorses, and sea grass.
2. Which of the following terms best describes these organisms?
community
biome
species
population
3.Which of these is an abiotic factor in a tundra ecosystem?
amount of sunlight
trophic levels
species richness
vegetation
Answer:
1. A population of 300 deer will remain at about 300
2. community
3. amount of sunlight
Explanation:
1. Carrying capacity is defined as the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available. Therefore if a population has reached its carrying capacity, it will most likely remain at that size.
2. A community is defined as all of the populations of different species that live in the same area and interact with one another. Clownfish, seahorses, and sea grass are all different species living in an area together and interacting with each other. This example does not show a population, nor a species, nor biome, since a population is a group of organisms of the same species, and a biome is a distinct biological community that has formed in reponse to a shared physical climate.
3. Abiotic factors are non-living factors which affect an ecosystem.
Why antibiotics are classified as drugs and useful drugs? Please helpp
Answer:
Antibiotics, also known as antibacterials, are medications that destroy or slow down the growth of bacteria. They include a range of powerful drugs and are used to treat diseases caused by bacteria. Antibiotics cannot treat viral infections, such as cold, flu, and most coughs.
Explanation:
what types of tissues make up the skeletal system
Answer:
The skeletal system is your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments. It's also called the musculoskeletal system
Explanation:
MARK AS BRAINLIST!!
Answer: The skeletal system gives the body shape and form and helps to both protect and support the entire organism.
Bone, cartilage, tendons, joints, ligaments and other connective tissues compose the skeletal system.
The two main types of bone tissue are compact (hard and dense) and cancellous (spongy and flexible) tissue.
Explanation:
During an earthquake, tectonic plates move
WHAT IS THE OPPOSITE REACTION?
Answer: fault boundary
Explanation:
Why aren't human populations evolving to produce immune systems that are able to fight off MRSA and other "superbugs"?
Answer: There are genes that code for different cell receptors that detect foreign substances. And for the immune system to fight these superbugs, the genes encoding these receptors must mutate and evolve. Humans have a slow rate of evolution, slower than bacterial evolution. Then not only human genes mutate at a very slow rate, but insect genes mutate very fast and can improve their strategy to evade the immune system.
Explanation:
A mutation is a random change in the nucleotide sequence or in a gene, which produces a variation in its characteristics and which is not necessarily transmitted to the offspring. They occur spontaneously by the action of mutagens, which are physical, chemical or biological agent that changes the genetic information of an organism and thereby increases the frequency of mutations above the natural level. In multicellular organisms, mutations can only be inherited when they affect the reproductive cells, called gametes (egg and sperm) A consequence of mutations can be, for example, a genetic disease, or it can also be a favorable improvement such as being able to fight against a virus. However, even if in the short term mutations could detrimental, they are essential for our long-term existence becuase without mutations there would be no change, and without change life could not evolve.
The immune system is the body's natural defense against infections, such as bacteria and viruses. The body attacks and destroys invading infectious organisms by the coordinated action of cells and proteins. Any substance or compound produced by an organism is a potential antigen when it is recognized as foreign by the immune system of another organism, whether it is of the same or a different species. In addition, the genes code for different cell receptors that detect these foreign substances. And for the immune system to fight these superbugs, the genes encoding these receptors must mutate and evolve. But, humans have a slow rate of evolution, slower than bacterial evolution. Then not only human genes mutate at a very slow rate, but insect genes mutate very fast and can improve their strategy to evade the immune system. Therefore, the human population may not have mutations that improve the immune system to help it fight againts these superbugs.
Which of the following is true?
A. Renewable energy is over 90% of the energy
use in the United States.
B. There is NO renewable energy used in the
United States.
C. Renewable and fossil fuel energy use is about
equal.
D. Renewable energy use counts for less than
10% of the energy use in the United States.
Answer:
Renewable energy is over 90% of the energy use in the united states
What is the relationship between mass and solar energy in plants?
Answer:
Plants increase in mass as they convert solar energy to chemical energy
what is photosynthesis
Photosynthesis is a synthesis of compounds with the aid of radiant energy especially in plants.
Radiant energy it transmitted in the form of electronmagnetic radiation; energy that exists in the absence of matter.
Synthesis is the process of producing a chemical compound usually by the union of simpler chemical compounds.
The combination of ideas into a complex whole.
Reasoning from the general to the particular or from cause to effect.
identify a factor that affects the likelihood of a mudslide
Answer:
Volcanic eruptions, there are more but that is all that I know