Answer:
physical changes only change the appearance of a substance
chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Explanation:
physical change: breaking a glass and chopping wood.
chemical change:food cooking and temperature change
Match these items.
1. first nuclear reactor
curie
2. 1/0 n
atomic mass
3. splitting of nuclei into lighter elements
fusion
4. number of neutrons and protons
Fermi
5. builds heavier elements
neutron
6. discovered radioactivity
Becquerel
7. unit of radiation
fission
Answer:
1. Fermi
2. Neutron
3. Fission
4. Atomic mass
5. Fusion
6. Becquerel
7. Curie
Explanation:
1. The invention of the first nuclear reactor was led by a scientist called ENRICO FERMI.
2. A neutron is a subatomic particle with the symbol "n". It has a mass number of 1 and a charge of 0, hence, it is debited by 1/0n
3. Nuclear fission is the splitting of nuclei into lighter elements.
4. Atomic mass or mass number is the number of neutrons and protons in the atom of an element.
5. Fusion is the building up of heavier elements from smaller ones. It is the opposite of fission.
6. Henri Becquerel is the physcist from France who discovered radioactivity.
7. Curie (Ci) is the unit of radiation, given after the scientist who contributed immensely to radioactivity, called MARIE CURIE.
Answer:
Answer:
1. Fermi
2. Neutron
3. Fission
4. Atomic mass
5. Fusion
6. Becquerel
7. Curie
Explanation:
A small bird gathers pollen and nectar for food, but at the same time is
aiding in the plant's reproduction by spreading pollen to other flowers it
visits. What does this relationship demonstrate? *
Answer:
Mutualism
Explanation:
In biology, the term symbiosis refers to close and often long-term interactions between organisms that belong to different species. There are three main types of symbiotic relationships:
mutualism - both organisms benefit from their relationshipcommensalism - one organism benefits, while the other doesn't benefit or suffer any harmparasitism - one organism causes harm to the otherIn the given scenario, both the bird and plant benefit from their relationship. The bird gets food, while the plant reproduces more easily. This is why their relationship is an example of mutualism.
can someone do #12 for me
Answer:
They are in charge of catching sunlight to make sugar,(food), during the process of photosynthesis. Chloroplasts and mitochondria use photosynthesis to capture sunlight, on the other hand, prokaryotic capture their sunlight from other sources of energy.
Explanation:
Which two layers of earth are made of rock
Answer:The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere . The layer below the rigid lithosphere is a zone of asphalt-like consistancy called the Asthenosphere . The asthenosphere is the part of the mantle that flows and moves the plates of the Earth.
Explanation:
At which point is ocean water the warmest?
O 1
O 2
O 3
O 4
Answer:
C, 3
Explanation:
I'm doing the test right now, and I watched the videos
what is the most common cutaneous receptor found in the skin?
The density and variety of receptors vary in different regions. For example, in hairy skin the peritrichial endings are most common, but Merkel's discs and free nerve endings are also present. In glabrous (hairless) skin, free nerve endings are present, as are Merkel's discs and Meissner's corpuscles.
Plant cells and bacteria both have cell walls. Many antibiotics work by breaking down the proteins that make up the cell wall, so bacteria become vulnerable to the human body's immune system.
Answer:
what do you need to know?
Explanation:
I learned about this in bio last year, maybe I can help
The plant cell wall is made up of cellulose and the bacterial cell wall is made up of peptidoglycan.
What is a cell wall?The cell wall is a protective covering found in plants and bacteria. When bacterial cell attacks the human system lysozymes are some kind of enzymes that degrades the human system.
Penicillin and lysozyme both affect the cell walls of bacteria. When bacteria divide, penicillin weakens their cell walls, causing them to burst and perish from osmotic pressure.
A little enzyme called lysozyme breaks down a bacterium's protective cell wall by attacking it.
Therefore, The plant cell wall is made up of cellulose, and the bacterial cell wall is made up of peptidoglycan.
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Enzymes that work in the stomach must adjust to the unique environment by being able to
A. function in an acidic environment
B. function in a neutral environment
C. function in a basic environment
D. function in an acidic and basic environment
Answer:
D im pretty sure
Explanation:
Enzymes that work in the stomach must adjust to the unique environment by being able to function in an acidic environment.
Which enzyme would most likely function in the stomach?One or more polypeptide chains of amino acids make up a big protein enzyme molecule. The unique protein folding patterns, which are crucial for enzyme specificity, are determined by the amino acid sequence.
Pepsin and rennin are the two primary enzymes found in gastric juice. While rennin coagulates the soluble milk protein, casein, into an insoluble curd, which is then attacked by pepsin, pepsin breaks down proteins into short polypeptide chains. Pepsin is produced by the chief cells of the stomach as pepsinogen, an inactive zymogen.
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Assuming that the motion of the object remains the same, at what position will the object be when it had traveled for a total of 6 s?
A. 2 m
B. 0 m
C. 1 m
Answer:
B. 0 m
Explanation:
The graph given is a position - time graphical model of the motion of a body.
The y-axis denotes the position of the body and the x- axis is the time taken.
To solve this problem, since the velocity of the motion is constant and no acceleration, we trace up the point 6s on the x-axis and find the y-axis equivalent.
Completing the graph, the point lies on 0m. At 0m, the object would have traveled for 6s.Answer:B. 0 m
Explanation:The graph given is a position - time graphical model of the motion of a body.
The y-axis denotes the position of the body and the x- axis is the time taken.
To solve this problem, since the velocity of the motion is constant and no acceleration, we trace up the point 6s on the x-axis and find the y-axis equivalent.
Completing the graph, the point lies on 0m.
At 0m, the object would have traveled for 6s.
Describe how and why varnishes are used in the restoration process
Answer: A cavity varnish provides a barrier against fluid penetration into the underlying dentin. When applied to dentin, a varnish may reduce postoperative sensitivity and limit migration of corrosion products into dentin, thereby reducing tooth discoloration. RMGI liner/base products seal the tooth and strongly bond to the restoration to reduce the incidence of microleakage between the tooth and the restoration. ... Reduces postoperative sensitivity — RMGI liner/bases offer a strong bond to the tooth, sealing the tooth structure to protect against microleakage.
Hope this helps...... Stay safe and have a Merry Christmas!!!!!!! :D
What does an injured person needs immediately?
Doctor
Vehicle
Clear road
First Aid
Answer:
An injured person needs an first aid ,if the person is not around the hospital the we should call an ambulance and take him to hospsuck
PLZ HELP!! An example of a technological advancement that was envisioned by a
science flction writer and has becomea part of everyday life is
OA Space vacations
OB. staircases
OGuniversal translators
)D credit cards
Answer:
Commenting so you can give the other dude Brainliest. answer is correct :)
Answer:
credit cards
Explanation:
The diagram below shows the main parts of the respiratory system.
Nose
ch
3
Lungs
Diaphragm
Which of these correctly names the parts of the respiratory system numbered 1
through 5 in the diagram above?
A 1. larynx, 2. pharynx, 3. trachea, 4. bronchi, 5. alveoli
B 1. pharynx, 2. larynx, 3. trachea, 4. bronchi, 5. alveoli
C 1. pharynx, 2. larynx, 3. bronchi, 4. trachea, 5. alveoli
Answer i belive it is C my frined if not then here a cookie my friend
Explanation:
1)In a food chain, with each feeding relationship, the energy transferred from one organism to another will(1 point)
a)remain constant.
b)be independent of the level.
c)increase.
d)decrease.
2)Food chains normally consist of no more than (1 point)
a)six organisms.
b)five organisms.
c)four organisms.
d)three organisms.
3)The black bear is common to North America. Black bears eat many foods, mainly grass, roots, berries, and insects. However, fish and mammals—including those already dead—are also part of their diet. Some tend to wander near campsites and can develop a taste for human food and garbage. Given this information, which term most accurately characterizes black bears? (1 point)
a)decomposers
b)producers
c)omnivores
d)carnivores
4)What is the usual composition of a food chain?(1 point)
a)a decomposer, some producers, and a consumer
b)a decomposer, a producer, and some consumers
c)multiple producers and a consumer
d)a producer and multiple consumers
Answer: The correct answers are:
1. D
2. C
3. C
4. D
Explanation:
I just took the quiz and these are the correct answers.
In the food chain, the energy transferred from one organism to another will decrease. Food chains consist of more than four organisms. The term shows black bears as omnivores. The makeup of a food chain is a producer and multiple consumers. The correct options are 1. D, 2. C, 3. C, and 4. D.
What is a food chain?A food chain is the joining of many organisms together with the medium of their food and the transfer of energy to form one organism to another organism.
It consists of producers, consumers, and decomposers. Producers are autotrophs. They are plants and consumers are animals, and other decomposers are bacteria and fungi.
Therefore, the correct options are 1. D, decrease., 2. C, four organisms., 3. C, omnivores, and 4. D, a producer, and multiple consumers.
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What is the cause of the differences in the offspring?
Answer:
animals with different species interbreed to produce a different and infertile offspring
Gregor Mendel studied many things at the University of Vienna. According to the
passage, which of the following topics of study was the most crucial to his final
analysis?
Answer: It would be the study of different plant varieties.
Explanation:
The one topic which study was the most crucial to his final analysis is the study of plant varieties. The correct option is B.
Who was Gregor Mendel?Gregor Mendel discovered the fundamental laws of inheritance while working on pea plants. He deduced that genes are inherited in pairs and as distinct units, one from each parent.
Mendel studied the segregation of parental genes and how they manifested in offspring as dominant or recessive traits.
Mendel's First Law is particularly noteworthy because he made his observations and conclusions (1865) without having any prior knowledge of the relationships between genes, chromosomes, and DNA.
The law of segregation is the most important of these three laws because it has no exceptions and is universally accepted.
The study of plant varieties was the most important topic for his final analysis.
Thus, the correct option is B.
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Your question seems incomplete, the missing part is attached below:
The study of statistics and probabilities
The study of plant varieties
The study of agriculture
His study of the experimental method
Which factors that affect the Florida peninsula can result from human activity?
O the formation of sand dunes and springs
O the formation of springs and drilling of artesian wells
O the intrusion of salt water and formation of sand dunes
O the mining of phosphate and erosion of the coast
Answer:
B. the formation of springs and drilling of artesian wells
Explanation:
The second option is the result of human activity because humans are the ones drilling the wells. The other options are formations as a result of natural causes.
Describe the difference in the thickness of the endometrium that you should observe when looking at histological samples of the uterus during the secretory phase compared to the uterus during the menstrual phase.
Answer:
The description including its issue is summarized throughout the clarification paragraph following.
Explanation:
Mostly during the containing period including its menstrual level, maximum density including its endometrium becomes 12 mm greater than the duration including its menstruation period, which would be 1-2 mm. The thing that is different due to all of the secretory granules process strengthens the uterus should help the fetus throughout fertilization which sustains childbirth, however, whenever fertilization doesn't happen, the endometrium starts to deplete such that the consistency is decreased.HELP HOW DO I SOLVE THIS
Answer:
Explanation:
Wht the budget it is hrd right
how many basic plant cell
ᴅᴏɴᴛ ɢᴏ ᴛᴏ ʙʀᴀɪɴʟʏ.ᴛᴏᴅᴀʏ! ᴛʜᴇʏ ᴡɪʟʟ ʜᴀᴄᴋ ʏᴏᴜ ᴀɴᴅ ꜱᴄᴀᴍ ʏᴏᴜ! ᴍʏ ɢʀᴀɴᴅᴘᴀ ɢᴏᴛ ʜᴀᴄᴋᴇᴅ ʜᴇʀᴇ! ɪᴛ ɪꜱ ᴀ ʙɪɢ ᴘʀᴏꜰᴀɴɪᴛʏ ꜱɪᴛᴇ! ᴛʜᴇʀᴇ ᴀʀᴇ ʙᴏᴛꜱ ᴏɴ ʙʀᴀɪɴʟʏ ᴛʀʏɪɴɢ ᴛᴏ ɢᴇᴛ ʏᴏᴜ ᴛᴏ ᴛʜɪꜱ ᴡᴇʙꜱɪᴛᴇ! ᴅᴏɴᴛ ʟᴇᴛ ᴛʜᴇᴍ ᴡɪɴ! ꜱᴘʀᴇᴀᴅ ᴛʜɪꜱ ᴛᴏ ᴏᴛʜᴇʀ ᴄᴏᴍᴍᴇɴᴛ ꜱᴇᴄᴛɪᴏɴꜱ! ꜱᴘʀᴇᴀᴅ ᴛʜᴇ ᴡᴏʀᴅ!
DONT BELIEVE ME?
THEY STOLE $50 FROM MY GRANDPA'S PAYPAL !!!
Explanation:
There are three basic types of cells in most plants. These cells make up ground tissue, which will be discussed in another concept. The three types of cells are described in Table below. The different types of plant cells have different structures and functions.
Describe the nonspecific antimicrobial effects of mucus, lysozyme, and acidic pH. For each of these substances, list where they are found in the body and how they function in fighting pathogens.
Answer: Non specific defence mechanism are the first lines of general defence that aids in preventing entry and minimising further passage of microbes and foreign materials into the body.
Explanation:
The non specific defence mechanisms protects us against any of enormous range of possible dangers using these methods:
--> defence at body surface
--> phagocytosis
--> natural antimicrobial substances
--> the inflammatory response and
--> immunological surveillance.
MUCUS is a slippery substance which covers the luminal surface of the Lungs. It provides defence at the body surfaces. Incase of any inhaled foreign material through the nose into the lungs, it's usually entrapped by the mucus. It is either coughed up or swallowed.
LYSOZYME: This is a protein with antibacterial properties present in granulocytes, tears and sweat. They are natural antimicrobial substances that destroys the cell walls of bacteria leading to its death.
ACIDIC Ph: The presence of acidic natural substances found in the stomach such as the gastric juice or hydrochloric acid, kills the majority of ingested microbes.
An early step in the process of carbon fixation combines three molecules of CO2 with three molecules of RuBP to produce three 6-carbon molecules, which are immediately converted to six 3-carbon molecules. These six molecules are phosphorylated and reduced to produce glyceraldehyde 3-phosphate (G3P). What additional events occur to complete the Calvin cycle
Answer:
release of one G3P to make sugars and regeneration of RuBP
Explanation:
The Calvin cycle can be defined as a part of photosynthesis that utilizes the energy stored by light-dependent reactions to produce three-carbon sugars. The first carbohydrate produced by the Calvin cycle is a three-carbon sugar phosphate called glyceraldehyde-3-phosphate (G3P). Subsequently, G3P is used to produce other sugar molecules such as, for example, glucose. The Calvin cycle consists of three steps: 1-carboxylation (by using CO2 in a reaction catalyzed by Rubisco enzyme), 2-reduction of phosphoglycerate (ATP phosphorylation), and 3-regeneration of ribulose-bis-phosphate (RuBP) by using triose phosphates produced in the first two steps.
What does ethidium bromide do?
Answer: Ethidium bromide is the most commonly used dye for DNA and RNA detection in gels. Ethidium bromide is a DNA intercalator, inserting itself between the base pairs in the double helix. Ethidium bromide has UV absorbance maxima at 300 and 360 nm, and an emission maximum at 590 nm.
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es and Moion Assessment (Luncn)
12of25
While waiting for the bus you take a seat on the metal bench at the bus stop. The bench feels very cold to you. Why? (AKS 7c DOK 2)
A The warmth in your hands is being transferred to the bench via conduction.
OB. The warmth in your hands is being transferred to the bench via convection.
Oc. The coldness of the bench is being transferred to your hands via conduction.
OD. The coldness of the bench is being transferred to your hands via convection.
Answer:
C the answer is def c
Explanation:
Why is the cell like a city?
Answer:
The cell is basically like a city because there are different parts of the cell that work together to keep a system running, therefore incredibly similar to a cell. There are parts to the cell such as the vacuole which acts as the storage for a cell, like the storeroom or bank in the city, and the lysosome which cleans up and recycles for the cell in away, acting as the recycle center or such for a city. Just like these few cell parts, there are many other parts which each have their respective "role" to functioning as a "city", and for those reasons a cell is like a city.
xplain how the enteric nervous system supports the digestive system. What might occur that could result in the autonomic nervous system having a negative impact on digestion
Answer:
It controls gastrointestinal track.
Explanation:
The enteric nervous system supports the digestive system because enteric nervous system controls gastrointestinal track and there is no control of central nervous system (CNS) in this gastrointestinal track. Our gastrointestinal tract comprise of our mouth, esophagus, stomach, small intestine, large intestine, and anus. If abnormality occur in autonomic nervous system which result in negative impact on digestion because autonomic nervous system regulates digestion process.
what plays as the boundary in a cell
Answer:
The plasma membrane....
Which of the following joints are diarthrosis joints? Check all of the boxes that apply. shoulder joint joints in the ankle joints between skull bones cartilaginous joints of vertebrae
Answer:
shoulder joints
joints in ankles
Explanation:
edgu2020
Diarthrosis joints include the shoulder joint and joints in the ankle.
Diarthrosis joints (also known as synovial joints) represent the most movable type of joints between bones.
In diarthrosis joints, the bones are not physically joined, and therefore they move freely.
Examples of diarthrosis joints are the shoulder, elbow, and ankle.
In conclusion, diarthrosis joints include the shoulder joint and joints in the ankle.
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The plasma membrane found in both prokaryotic and eukaryotic cells is composed of a/an _______, which is semipermeable and controls the flow of molecules into and out of the cell.
Answer:
Phospholipid layer
Explanation:
The plasma or cell membrane is the outer covering of prokaryotic (bacteria) and eukaryotic (plants and animal) cells that provides support to the cytoplasm. The plasma membrane is made up of components like phospholipid layer, proteins, etc. However, the PHOSPHOLIPID LAYER component of the plasma membrane confers its SEMI-PERMEABILITY upon it.
The phospholipid layer consists of a hydrophilic i.e. water-loving region (phosphate head) and hydrophobic i.e. water-fearing region (fatty acid tails) that allows it to selectively control the flow of molecules into and out of the cell.
AWNSER ASAP
Identify the two careers that do not require any college education.
dental assistant
dietitian
home health aide
physician assistant
social worker
Answer:
the two careers that don't require any college education are a dental assistant and a home health aide
Explanation:
using the process of elimination....
a dietitian requires a bachelor's degree,
physician assistant needs a masters degree (in most cases)
social worker needs a bachelor's degree
this means the other 2 remaining options...
dental assistant & a home health aide do not require a college education