Answer:
C i did this in ed not to long ago
Which occupational hazards are associated with wool
and Silk industries and how they can be minimised
Answer:
-Respiratory diseases like asthma, bronchitis etc, are very common among these workers
-The workers suffer from various skin infections
-Other health problems include headache, fever, back pain, neck pain, ect.
Explanation:
hope this helps
HELP PLEASE If carrots were removed from the food web, how might the other populations be affected?
There might be more rabbits and foxes.
There might be more grass but fewer owls.
There might be fewer rabbits and foxes.
The rabbits might start eating mice.
A radioactive material has a half-life of 30 days. You begin with 4 grams of radioactive material.
a. How much of the original is left unchanged after 90 days?
b. After 120 days?
Give explanation. Don't go.ogle.
Answer:
a. 0.5 grams b. 0.25
Explanation:
Just use the half-life formula(I linked it below)
a. 4(1/2)^90/30=1/2
b. 4(1/2)^120/30=1/4
A. 0.5 grams is left unchanged after 90 days.
B. 0.25 grams is left unchanged after 120 days.
What is Half life?The half-life of a radioactive isotope is defined as the time it takes for half of the radioactive isotope to decay. It is stable in specific radioactive isotopes. It is unaffected by circumstances. It is also independent of the initial amount of that isotope.
It can be find out by this formula:-
[tex]N=N_o (1/2)^n\\\\[/tex]
where, N= quantity of the substance remaining
[tex]N_o[/tex]= initial quantity of the substance
n= number of half lives
For above given example,
Given that radioactive element X has a half-life 30 days
Hence the number (n) of half-lives in 90 days
n=90/30
n=3
The amount N of radioactive element X left after n=3 half-lives with initial amount [tex]N_o[/tex]=4 gm
[tex]N=N_o (1/2)^n\\\\\\N= 4 (1/2)^3\\N= 4(1/8)\\N= 0.5 gms\\\\\\[/tex]
For 120 days, n=120/30
so, n= 4
Then,
[tex]N=4(1/2)^4\\N=4(1/16)\\N=0.25 gms[/tex]
Thus, A. 0.5 grams is left unchanged after 90 days.
B. 0.25 grams is left unchanged after 120 days.
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PLEASE ANSWERR
Which of the following is the independent variable for a controlled experiment
investigating how waste production affects a certain person's ecological
footprint?
A. Opinion the person has about environmental impact
B. Measurement of the amount of waste produced
C. Identification of the person
D. Calculation of resulting ecological footprint
Answer: Measurement of the amount of waste produced.
Explanation:
Measurement of the amount of waste produced is the independent variable for a controlled experiment in this case. Therefore, the correct statement is option B.
What is the independent variable?The independent variable is the variable that can be changed in a controlled experiment. In this case, the researcher can manipulate the amount of waste produced followed by observation of its effect on the ecological footprint.
The researcher can manipulate the amount of waste by changing the factors such as the type of waste produced, recycling facilities available, etc. under controlled conditions.
Once the independent variable is manipulated, the researcher can observe its effect on the dependent variable. In this case, the ecological footprint of the individual is a dependent variable. The dependent variable is the variable that can be affected by the independent variable and is measurable.
Therefore, the measurement of the amount of waste produced is the independent variable for a controlled experiment.
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Researchers Robert Briggs and Thomas King used ultraviolet radiation to destroy the nuclear DNA of frog eggs. Nuclei from adult skin cells and from tadpole-gut epithelial cells were cultured and then injected into eggs that had their nuclei destroyed. The results were tadpoles. Which conclusion is supported by the data from this investigation?
Answer:
Nuclei of gametes and somatic cells are similar to each other in its function.
Explanation:
The conclusion of the data is that the nuclei of gametes and somatic cells are similar to each other because both performs same function in the cell i.e. regulates activities of the cell. The nuclei of somatic or skin cells work efficiently in the egg cells due to similar composition and structure of nuclei that performs similar function in the cell so that's why injection of skin cell's nuclei into egg cells results the same i.e. formation of tadpoles.
Suppose a trait is controlled by a gene that has one dominant allele (G) and one recessive allele (g).
Which of the following crosses would be expected to produce the greatest variety of genotypes among the offspring?
Answer:
Gg x Gg
Explanation:
Gg x Gg crosses would be expected to produce the greatest variety of genotypes among the offspring.
What is Punnett Square?A Punnett square is defined as a graphical representation of the possible genotypes of the offspring resulting from a particular cross or breeding event. Creating a Punnett square requires knowledge of the genetic makeup of the parents.
For a monohybrid cross, Punnett squares are 2X2 squares containing four boxes where each represents a fertilization event between the original gametes. While the second type is used to predict the outcome of breeding experiments where two traits are being observed and the Punnett square is large with sixteen boxes.
In the above example, if a Gg x Gg cross occurs, the genotype for the children will be Gg, which would be expected to produce the greatest diversity of genotypes among the offspring, i.e. 100%.
Thus, Gg x Gg crosses would be expected to produce the greatest variety of genotypes among the offspring.
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How does heat affect the thermal energy of an object that is colder than the air that surrounds it?
Answer:
Heat decrease the thermal energy of an object as energy moves to the air. Heat causes the thermal energy of the object to increase as energy moves from warmer air to the colder object
I dont know what is the answer sorry!
factors that affect blood flow through the bone marrow
Kenapakah sel haiwan tidak mempunyai bentuk tetap?
Answer:
kerana sel haiwan tidak mempunyai dinding sel
what is endocrine system
Answer:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
Which of the following is true about plants and cellular energy?
A.
Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
B.
Plants use light energy to produce food molecules during cellular respiration and to obtain cellular energy from the bonds of these food molecules during photosynthesis.
C.
Plants can use light energy to produce food molecules or to obtain cellular energy from the bonds of these food molecules during cellular respiration.
D.
Plants can use light energy to produce food molecules or to obtain cellular energy from the bonds of these food molecules during photosynthesis.
Answer:
A.
Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
answer:
A. plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
explanation:
photosynthesis is the process through which plants synthesize food with light energy (photo-)photosynthesis is the process by which organisms, such as green plants, use light energy to produce foodcellular respiration is the process by which living things, including both plants and animals, obtain energy from the bonds of food moleculestherefore, plants use light energy to produce food molecules during photosynthesis, and obtain cellular energy from the bonds of these food molecules during cellular respirationHELP PLEASE 20 points
Answer:
Answer 10
Explanation:
PLEASE HELP!
What claim or claims can you make about the impact of climate change on sea level rise?
What is your evidence for this claim?
Answer:
POLUTION
Explanation:
Answer:
I can make the claim that climate change and the sea level rise have a positive correlation. The graph shows that as the impact of climate change increases so does the sea level conveying that they are positively correlated.
How are birds adapted for flight? A. Their body shape; B.Smooth waxy feathers; C.Hollow bones; D. Beaks
Answer:
Hollow bones is the correct answer.
Explanation:
As hollow bones makes the density of bird less than air that's why birds can fly easily
Answer:
hollow bones
Explanation:
11. All plant and animal life on Earth contains what element?
A)sulfur B)carbon C)silicon D)aluminum
Answer:
B.Carbon
I think sorry if it's wrong
Which new animal adaptation may be favored if average
temperatures in a temperate forest decreases by 25
degrees C over 1500 years?
Answer:
If the average temperatures of temperate forests fell by about 25ºC during the period of 1500 years, the natural modification of the animals that would be favored would be that which allows an adaptation to the new climatic circumstances by the fauna of said forests, that is , to the notable drop in temperature. Thus, for example, animals would develop more voluminous furs, which would allow them to heat their bodies in a better way.
If there are only a few remaining members of an insect species living in one area, which would most likely cause this species to become extinct?
Answer:
introduction of new predators to the insects.
Answer:
the introduction of new predators to the insects’ environment
Explanation:
How are a good chain and a good web different
Answer:
Explanation:
A food chain only follows one path of what food animals eat. A food web consists of many food chains that show how plants and animals are connected. In conclusions, a food chain focuses on a certain animal or their path and they are linear. Food webs are more complex which show how the ecosystem works together to create a balance.
Answer:
A food chain goes in one drection and a food web is more complex and is a whole system of connected food chains.
Explanation:
a cross between a white horse and a chesnut horse produce all light brown horses
Answer:
Incomplete dominance
Explanation:
- Eijiro <3
Answer:
incorrect.
Explanation:
there is a possibility. but in reality color does not effect the foal.
My Friesians grandfather was an Akhal teke that was gold. He gave birth to all black offspring as you can see in the attachment.
The chromosome are arranged to show
ll
13
O A. homologous pairs
O B. tetrads
OC. independent assortment
O D. nucleotides
Answer:
D. nucleotides
i'm not sure
The real length of one villus is 0.8 mm
Calculate the image length if the villus is viewed at a magnification of 20
Use the equation:
size of image
magnification =
size of real object
[3 marks]
Answer: 16 mm
Explanation:
If I understood the given equation correctly, it could be rewritten as:
size of image = size of real object * magnification
Plug in the given values, and we get
size of image = 0.8 * 20 = 16 (mm)
An elderly woman finds that her back hurts almost all the time. Her doctor tells her it is because she has osteoporosis. Why might a disease that causes her bones to thin make her back hurt?
A) The bones of her vertebrae have lost calcium and crumbled enough to begin pinching the nerves leaving her spinal cord.
B) The muscles in her back are slowly destroyed as the bones of her vertebrae get thinner and collapse.
C) The motor neurons inside the bones of her vertebrae send pain messages to her brain as the bone dissolves.
D) Her bones cannot support her skin and muscles adequately, and so the muscles cramp and hurt.
Answer:
I think no b is the right answer
Answer:
the answer is a
Explanation:
Which of the following agricultural products requires the least amount of energy?
beef cattle
dairy cows
wheat
both (a) and (b)
If anyone has all the answers to The Universe Unit Review Practice please moment them
Answer:
C. a distant luminous object travels rapidly away from an observer.
Explanation:
Option C is the correct answer.
Redshift is actually observed when a distant luminous object travels rapidly away from an observer.
In redshift, observers actually see an object that is travelling away from them and it has longer wavelength. The opposite is the blueshift where observers see a light traveling towards them and shifted to shorter wavelength.
In astronomy, redshift takes place when the object's visible light travels towards the red end of the spectrum.
A red shift is observed when a luminous object is moving rapidly away from the observer.
A red shift refers to a shift to a longer wavelength. It is observed when a luminous object is moving away from an observer. This is different from a blue shift where the luminous object is moving towards the observer.
Hence, in astronomy, a red shift is observed when a luminous object is moving rapidly away from the observer.
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Help me please pink green yellow green
Answer:
pink green yellow green.
sorry, but I don't get yr question.
stay safe healthy and happy.Where does most of the mass of trees come from
Answer:
The mass of a tree is primarily carbon. The carbon comes from carbon dioxide used during photosynthesis. During photosynthesis, plants convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.
What experiment is left overnight what would be the observation fresh potato in sugar solution and water
Which of the following is NOT a use of floral preservatives?
O Replenishing the food source
O Lowering the pH
O Reducing bacterial growth
O Preventing ethylene damage
this is a real question, dont take it out of context GUYS. What is the white sticky stuff called that comes out of that plant that bugs die from if they eat? i also forget the name of the plant smh.
Answer:
Mealybugs will commonly leave a white residue on a plant's leaves that resembles cotton. You will find this residue mostly on the stems and leaves. ... You may also find that the plant has a sticky residue on it. This is honeydew and is secreted by the mealybugs.
Explanation:
Answer: I d k
Explanation:
Describe three ways that the growth of suburban populations would have affected land and aquatic ecosystems around cities.
Answer: The three ways the growth of suburban populations( urbanisation) would affect the environment include:
--> Insufficient water availability,
--> Waste-disposal problems, and
--> High energy consumption.
Explanation:
The growth of suburban population is also called URBANISATION. This is defined as the rapid growth of an urban area which occurred due to the movement of individuals from rural areas into the urban area. There are different reasons why individuals migrate to urban areas these include:
--> for a better access to health care services
--> for more education opportunities
--> To combat the problems of unemployment and
--> for better participation in political and social activities.
The three ways the growth of suburban populations( urbanisation) would affect the environment include:
--> Insufficient water availability: the increase in the urban population creates a high demand for water use both for industrial and domestic uses.
--> Waste-disposal problems, and
--> High energy consumption.
Answer:
Deforestation, Water pollution, Introduction of invasive species
Explanation:
For ages, human beings have been altering the natural ecosystems and causing irreparable damages to nature. Development drove to an unmeasurable advance over new unpopulated areas.
Some of the principal human activities responsible for biodiversity loss are
• the uncontrolled use of unrenewable resources,
• overexploitation of renewable resources;
• land destruction for the mining industry, farming and cattle industry, buildings, and other infrastructures;
• the unplanned advance of cities, and opening of new roads to connect those cities.
All of them involving
deforestation and fragmentation of natural landscapes; water, air, and soil pollution, species loss, and reduction of biodiversity. Introduction of invasive species.And the growth of suburban populations is a frequent human activity causing an impact on nature. To mention a few ways in with this action might affect ecosystems, we can name the followings,
Deforestation:
The growth of suburban populations is indefectibly related to deforestation. New open areas are needed for buildings, roads, and service establishments, such as natural gas or water ducts, light, and others. There hardly exists planning about the cities´ growth and conscientious conservation of nature.
Water pollution:
Water is severely polluted while constructing buildings and roads. The wastes of materials used for construction, oil coming from transport and machinery, human wastes, among other sources of contamination reach the rivers or lakes, polluting them and altering the natural equilibrium.
Introduction of invasive species:
It is very common to use ornamental vegetable species, proceeding from other areas or countries to arrange the gardens, streets, and parks. These species might become invasive and uncontrollable, causing severe damage in native endemic species by competing for resources. The whole ecosystem structure changes.
Deforestation, water pollution, and the introduction of invasive species are some of the causes of biodiveristy loss.