There are different forms of energy and one form of energy can be converted into another. When we light a wax candle, the process is highly exothermic and on burning, the chemical energy of the wax gets converted into heat and light. A good source of energy is to be selected for the choice of work to be done. In ancient times, wood was the most common source of heat energy. We, in our daily lives, use various energy sources for doing the work. Nowadays we use diesel and electricity to run trains. We also use fossil fuels in vehicles which has some serious disadvantages, mainly air pollution. The recent example of air pollution was ‘Smog’ in the National Capital Region of Delhi. This pollution was a result of burning ‘Parali’ in northern states of the country, which affected the eyes and also caused serious respiratory problems.
4(a) State the energy conversion that takes place when we light a wax candle. 1
4(b) List two criteria of selecting a source of energy for a specific work. 1
4(c) Write the names of two fossil fuels. 1
4(d) why are we looking at alternate sources of energy? 1
Answer:
shiii tbh thats hard
Explanation:
HIV can paralyses the immune system of a person infected by the virus.
Explain why.
Explanation:HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
Because HIV can hide inside of cells
What is its primary function of the structure?
Answer:
What structure? Tell me and I'll come back and edit this answer to help!
Explanation:
Plant cells are what build/make-up the plants although the main purpose is Photosynthesis
Photosynthesis happens in the Chloroplasts of the plant cell and it is the process that plants get food, by taking advantage of Sunlight, Carbon Dioxide, and Water
If a certain band on one chromatography strip has been identified as
chlorophyll a, chlorophyll a could be identified on a second
chromatography strip by looking for a band
A. with no colour
B. of darker colour
C. in reverse position
D.in a parallel position
Answer:
D
Explanation:
The same chlorophyll can be identified if it moves the same distance up the second chromatography strip as it did on the given chromatography strip.
Chromatography strip by looking for a band in a parallel position.
What is meant by Chromatography?The process of chromatography separates molecules because of the different solubilities of the molecules in a selected solvent. In paper chromatography, paper marked with an unknown, such as plant extract, is placed in a developing chamber with a specified solvent.Chromatography strip by looking for a band in a parallel position.
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Which two types of stars will enter the supernova phase?
Average and Massive Stars
Average and Supermassive stars
Massive and Supermassive Stars
Neutron and Red Stars
Answer: Massive and Supermassive stars
Which is true of all organs in the human body? They are made up of two or more tissue types. They produce red and white blood cells. They remove harmful substances from the body. They are composed of one main type of cell.
Answer:
They are made up of two or more tissue types.
a beta 1,4 linkage is used to form lactose. sketch a hypothetical disaccharide where it instead links between two monosaccharide that form lactose via an alpha-1,6 formation
Answer:Oligosaccharides are built by the linkage of two or more monosaccharides by ... Two molecules of glucose are linked by an α-1,4-glycosidic bond to form the ... Sucrose, Lactose, and Maltose Are the Common Disaccharides ... The branches are formed by α-1,6-glycosidic bonds, present about once in 10 units (Figure 11.13).
Explanation:
Type the word that appropriately completes each statement.
All fish reproduce sexually, but fertilization may occur in one of two ways.
In__________
fertilization, the female fish releases eggs in the water or on a surface. The male fish spreads
sperm over the eggs to fertilize them.
In__________
fertilization, the eggs are fertilized inside the female's body. The young develop there until the
female gives birth.
exExplanation: external internal
Hello, 3Coli here!
Here is your answer:
In external fertilization, the female fish releases eggs in the water or on a surface. The male fish spreads sperm over the eggs to fertilize them.
In internal fertilization, the eggs are fertilized inside the female's body. The young develop there until the female gives birth.
Hopefully, this helps! :D
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Isotopes of the same element will have a different number of neutrons, but the same number of protons.
Please select the best answer from the choices provided
T
F
Answer:
true
Explanation:
Atoms of the same element that contain the same number of protons, but different numbers of neutrons, are isotopes.
Answer:
TRUE!!!!!
Explanation:
Poggers
How does the nitrogen cycle control the quality of water within a aquarium and what could cause an imbalance (build of toxic chemicals such as ammonium).
Answer:
Explanation:
Ammonia is removed from an aquarium system through the use of a biofilter. The biofilter provides a substrate on which nitrifying bacteria grow. These nitrifying bacteria consume ammonia and produce nitrite, which is also toxic to fish. Other nitrifying bacteria in the biofilter consume nitrite and produce nitrate.
pleas brainleast me
Darwin studied actual birds on the Galapagos Islands instead of using a simulation, as you did in this lab. Studying natural selection in the field can be challenging. List at least three possible challenges Darwin might have faced.
Answer:
1. Darwin did not know how genetic material passed from one generation to the next because Mendel's laws of heredity had not yet been formulated
2. Finches have many phenotypic adaptations that can not be observed easily
3. Phenotypic traits are expected to evolve slowly, thereby taking many generations
Explanation:
In the Galapagos Islands, Darwin observed that there were many varieties of finches that showed variation in the size and shape of their beaks. Darwin determined that finches' beaks evolved in response to environmental changes (finches' beaks were different in different islands). Darwin had several challenges to make this discovery. First, Mendel's laws of heredity had not yet been formulated, thereby difficulting the analysis of quantitative traits (in this case, finches' beak) which are the result of the combined action of many genes and the environment. Second, finches (as well as all species) possess many phenotypic adaptations, thereby difficulting the study of single traits in an evolutionary context. Finally, phenotypic changes are gradual and therefore descendence with modification cannot be easily recognized by observation in the field.
Answer:
Traits other than beak type might affect natural selection.
It could take many generations to observe adaptions to a population.
The environment may be complex and hard to study.
Changes in the environment may occur faster or slower than changes to the birds
The birds may be interdependent with other organisms that may change, too.
Explanation:
just took the quiz
this the sample
Food-borne illnesses can have substantial health and economic consequences. Correctly identify the steps that can lead to food-borne illness by Salmonella/Campylobacter and E. coli 0157:H7
1. Bloody diarrhea and hemolytic uremic syndrome can result
2. Live E. coli 0157:H7 bacteria are ingested
3. A Shiga-like toxin is produced
4. Incomplete cooking of raw hamburger fails to kill all pathogens
5. Live Salmonella or Campylobacter bacteria are ingested
6. Diarrhea, abdominal pain and nausea can result.
7. Incomplete cooking of poultry and fruits/vegetables fails to kill all pathogens
8. The pathogen multiplies in the intestinal tract for 2-48 days
Answer:
4,6,5,1,3
Explanation:
Which best describes the process that occurs when nuclear DNA codes for a protein in the cytoplasm
Answer:
Transcription is the process
Translation is the process that occurs when nuclear DNA codes for a protein in the cytoplasm.
How DNA is translated into protein?Transcription is defined as a process where DNA is transcribed into mRNA. Translation occurs in the cytoplasm inside the ribosomes where mRNA is translated and synthesized into a protein with the help of rRNA and tRNA.
DNA is the genetic material, which is transcribed into mRNA, this process copies the DNA into another nucleotide sequence, and this messenger RNA is passed into the nucleus, where it translates.
In the cytoplasm, mRNA is translated into the amino acid sequence with the help of ribosome and tRNA.
Therefore, translation best describes the process that occurs when nuclear DNA codes for a protein in the cytoplasm.
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Edward is extremely romantic and wants to give Bella an entire bouquet of pink snapdragons, her favorite flower. Unfortunately, Edward only has red snapdragons in his greenhouse. In order to produce the most number of pink snapdragons, what color flower should Edward cross with his red snapdragons?
Can someone help me with this question?
Thanks.
In a food chain or web, is organism would be classified as a(n)
Answer:
producer
Explanation:
Animals get the most of the nitrogen they need
Which of the following is a true statement about the sex of the newborn "male" child.
The father determined the sex which is XX
The mother determined the sex which is XX
The father determines the sex which is XY
ООО
The mother determines the sex which is XY
None of the above are true
Answer:a
Explanation:
Which of the following is an example of osmosis?
Explanation/answer: Glucose is transported from our blood stream across cell membranes and into the cytoplasm. Sodium is pumped across a cell to increase its concentration on one side of the cell membrane.
Fog will usually form if the temperature and _______ match.
Answer:
dew point
Explanation:
i looked it up but i could be wrong
This site isn't exactly for talking but whatever.
Are you against or for transgender identities, and why? I'd love to have a civil chat no matter your opinions. Also please put your pronouns if you use them so everything is easier.
- A trans guy (he/him)
Answer:
i am 100% FOR them. i myself am transgender so i mean i kinda have to support my community haha. im ftm trans : ) he/him
from a particular location on earth, why can we see many more total eclipses of the moon that the total eclipses of the sun?
Answer:
Hiii! I'm here to help!
Explanation:
The Moon is always in the same place in our sky while the Sun moves around the sky. The Moon is much bigger in the sky than the Sun. The line-up of the Earth Moon and Sun needed for a lunar eclipse happens many many times more often than what is needed for a solar eclipse. A total lunar eclipse is visible over a much larger part of the Earth's surface than a total solar eclipse.
What happens when a cell becomes too large? List two possibilities.
Answer: As a cell grows bigger its internal volume enlarges and the cell membrane expands the volume increases more rapidly than does the surface area and so the relative amount of surface area available to pass materials to a unit volume of the cell steadily decreases.
Explanation:
i hope this helps this is only one possibility tho
Below is an image of a well. Explain what type of well this is and how it works
Answer:
This is an artesian well. An artesian well is simply a well that doesn't require a pump to bring water to the surface. This occurs when there is enough positive pressure in the aquifer to bring the water to the surface. An artesian aquifer is confined between impermeable rocks or clay which causes this positive pressure.
Explanation:
This is the answer for the pic I put but sorry if it's not the right well
plsssss help me :) thank you luv
Answer:
liquid 1 and 4 because it is the same melting point
Explanation:
Answer:
liquid 1 and 2
Explanation:
How do bones grow (explain the process)?
Answer:
Bones grow in length at the epiphyseal plate by a process that is similar to endochondral ossification. The cartilage in the region of the epiphyseal plate next to the epiphysis continues to grow by mitosis. The chondrocytes, in the region next to the diaphysis, age, and degenerate.
Which two statements explain how the uneven heating of Earth's surface
affects Earth's weather patterns?
A. Warm air continuously leaves the poles and moves toward the
oceans.
B. Warm air rises and cool air sinks, forming a convection current
C. Warm air moves away from the equator toward cooler regions.
D. Warm air flows from the northern hemisphere to the southern
hemisphere.
Explanation:
I think it is b because when warm air rises it always affects the earths weather pattetn
What effect does dietary protein have on the body?
Answer:
Dehydrating effect
Explanation:
Answer:
Dietary protein serves several important functions. It provides the essential amino acids, which are used for protein synthesis in the growth and repair of tissue, and it is the body's principal source of nitrogen.
A television works by transforming electrical energy into what other kinds of energy?
a) light thermal and sound
b) thermal chemical and solar
c) sound mechanical and electrical
d) light chemical and mechanical
Answer: It is A
Explanation: It is A because the television gives off light and sometimes that could heat up the tv and it is sound because obviously television makes sounds because of the volume :) hopefully that helps.
Option A, which is light heat and sound, is the right response. Electrical energy is converted into different forms of energy by a television to operate. Thermal energy, sound, and light are produced using this energy.
What is the first step of the mechanism ?The power supply unit first changes electrical energy into alternating current (AC). The image tube, which has a vacuum and an electron gun, receives this AC after that. Electrical energy is transformed into thermal and optical energy by the electron cannon.
The thermal energy is subsequently lost while the light energy is focused onto the screen. The speakers produce the sound by transforming electrical energy into sound waves. The other choices are inaccurate because they do not adequately depict how a television converts energy.
Option B uses energy sources other than televisions, such as chemical and solar energy. The mechanical and electrical energy found in the television is included in Option C. Option D also uses chemical and mechanical energy, which a television cannot produce.
As a result, choice A is the right response.
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A section of one DNA strand has the sequence ACC GAG GTT. What is the sequence of the strand it binds to?
Answer:
UGGCUCCAA
Explanation:
Basically when you transcribe DNA into mRNA, you find the complementing base pair, for example if G is written in the DNA, the mRNA would show C, and if an A was in the DNA, a U would be shown. It is NOT THYMINE in RNA!! This changes to Uracil in RNA, and that is VERY important. The reason why it is flipped is because of the tRNA. So 3 mRNA nucleotides make a codon, and the tRNA are also in sets of 3, but are called anticodons. The tRNA is complementary to the mRNA strand, AKA the same as the DNA strand except with Uracil instead of Thymine. This is because Thymine breaks down in the presence of Oxygen and so is replaced by Uracil.
All of the following are evidence supporting the theory of plate tectonics except for ______
O hot spots
O paleomagnetism
O ocean floor drilling
O changes in the Moon's orbit
D or aka changes in the moons orbit
Hope this helps you