Answer:
Explanation:
Oxygen gas and water must be present for iron to rust.
A region of the metal’s surface serves as the anode, where oxidation
occurs:
Fe(s) → Fe²⁺ (aq) + 2 e⁻
The electrons given up by iron reduce atmospheric oxygen to water at the cathode, which is another region of the same metal’s surface:
O₂ (g) + 4H⁺ (aq) + 4 e⁻ → 2 H₂O (l)
The overall redox reaction is:
2 Fe(s) + O₂(g) → 4H⁺(aq) + 2Fe²⁺ (aq) + 2 H₂O(l)
The Fe²⁺ ions formed at the anode are further oxidized by oxygen:
4 Fe²⁺ (aq) + O₂(g) 1 (4 + 2x) H₂O (l) → 2 Fe₂O₃ . xH₂O(s) + 8 H⁺(aq)
This hydrated form of iron(III) oxide is known as rust. The amount of water associated with the iron oxide varies, so we represent the formula as 2 Fe₂O₃ . xH₂O.
DUE NOW PLEASE HELP ME!!!!! 10 POINTS
Give the function of all of the following parts of a typical flower. a. Petals
b. Stamen c. Pistil
d. Ovule
A.Petals. Usually, petals are the most prominent part of a flower structure, owing to their vivid color (in most flower examples) and sometimes scent. Their main function is to attract pollinators and also protect the inner reproductive structures of a flower. In some flowers, petals are absent or reduced.
B.Stamen: The pollen producing part of a flower, usually with a slender filament supporting the anther. Anther: The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma.
C.Pistil interaction precedes fertilization in the flower. Important changes occur in the pistil, which play a role supporting, but also controlling pollen-tube growth
D. The ovule is the organ that forms the seeds of flowering plants. It is borne in the ovary of the flower and consists of nucellus protected by integuments, precursors of embryo/endosperm, and seed coat, respectively.
Describe the role of the lens in vision.
Answer:
The lens is located in the eye. By changing its shape, the lens changes the focal distance of the eye. In other words, it focuses the light rays that pass through it (and onto the retina) in order to create clear images of objects that are positioned at various distances.
Explanation:
Also, I searched this up, but I hope this helps :) !
The main optical function of the lens is to transmit light, focusing it on the retina. The cornea contributes about 80% of total refraction, while the lens fine-tunes the focusing of light onto the retina.
What is refraction?Refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium.
Moreover, refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.
Therefore, light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction, an effect called refraction.
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How would I explain it?
Answer:
What would explain the change in reaction rate —degradation of cellulose by the enzyme cellulase—after 75 minutes is the depletion of the substrate on which the enzyme must act.
Explanation:
A chemical enzymatic reaction, such as cellulase degradation of cellulose, occurs until the substrate is consumed.
The solution to which cellulase is added has the same concentration of cellulose, and what is done is to add enzyme. In the graph you can see that the reaction takes place over time, decreasing the amount of glucose obtained. From 75 minutes onwards the reaction rate decreases as well as the amount of glucose obtained from the reaction, which is due to the fact that the substrate —cellulose— is being depleted.
Where on Earth can you find collision zones?
Answer:
You can find collision zones on the edge of the Pacific Ocean offshore Washington, Canada, Alaska, Russa, Japan, and Indonisa.
Explanation:
What is the cell labeled X
Answer:
im assuming stomata or guard cells. need the whole picture though
Which of the following are true about cancer? Check all that apply.
Cancer cells display contact inhibition.
Cancer is contagious.
Cancer cells divide uncontrollably.
Cancer can spread around the body.
Cancer comes in many forms.
Cancer affects only the elderly.
Cancer cells invade healthy tissue.
Cancer does not obey contact inhibition.
Answer: I think these are the answers:
- Cancer can spread around the body.
- Cancer cells invade healthy tissue.
- Cancer cells display contact inhibition.
- Cancer comes in many forms.
- Cancer cells divide uncontrollably.
and I think "Cancer does not obey contact inhibition." is one too... I hope this helps! :D
Explanation:
Cancer cells:
• Divide uncontrollably
• Comes in many forms
• Invade healthy tissues
• Does not obey contact inhibition
What is cancer?Cancer is a diseased condition in which uncontrolled cell division takes place.
Cancer are of two main types: benign and malignant.
Benign tumours are localized to a particular organ and thus can be removed through chemotherapy or surgery.
Malignant tumours spread to body parts through blood stream and attack the healthy cells. This property of metastasis is unique to cancer cells.
Normal cells show their contact with the adjacent cells. In cancer, contact inhibition is lost and so they divide in an uncontrolled manner.
Breast cancer, leukaemia, lung cancer etc are some of the examples of cancer.
Cancer is detected through tissue biopsy. X-Rays, CT-Scan, MRI are some other techniques that detect cancer in the body.
Cancer can be treated if diagnosed early. Radiotherapy, chemotherapy and surgical intervention are the part of cancer treatment.
Therefore, cancer is considered a serious medical complication.
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Please help
Which type of transport is occurring in this picture? Question 7 options:
A. Osmosis
B. Facilitated Diffusion
C. Simple Diffusion
D. Endocytosis
Answer:B facilitated diffusion
Explanation:
Will mark brainliest!
Please help!
Look at the photo above :)
Answer:
whjat
Explanation:
What molecule contains the most energy ?
Answer:ATP
Adenosine 5'-triphosphate, or ATP, is the most abundant energy carrier molecule in cells. This molecule is made of a nitrogen base (adenine), a ribose sugar, and three phosphate groups. The word adenosine refers to the adenine plus the ribose sugar.
Explanation:
Brainleist for answering #12 and #13
Answer:
increase
decrease
have no effect
Explanation:
state that in a reflex arc the synapse ensure that impulse travel in one direction only
Answer:
Explanation:
Neurotransmitters are molecules that fit like a lock and key into a specific receptor. Therefore, nerve impulses cannot travel in the opposite direction, because nerve cells only have neurotransmitter storage vesicles going one way, and receptors in one place
5. The structures pictured in Fig. 1 are found on the undersurface of a leaf.
What is the name and function of these structures?
Please i really need help because i’m french and it’s hard
Answer:
I think the black ones are stomata or guard cells and they are attached on epidermis
Stomata is used for breathing and epidermis is the skin(outer layer) of plants
Explanation:
I hope this helps a little please give me brainliest
Answer:
epidermis
provides barrier against injury and water loss
guard cells
surrounds stomata also closes and opens stomata
stomata
allows gaseous exchange
Explanation:
If matter (mass) has never been observed by any process or experiment to be created or destroyed, then using inductive reasoning it would be logical to conclude:
the mass of the universe must have created itself.
the known laws of science cannot account for the origin of mass.
the amount (quantity) of mass in the universe has never changed.
Answer:
B.the known laws of science cannot account for the origin of mass.
Explanation:
i just finish that test
Which rock has the highest metamorphic grade?
Answer:
The answer is Gneiss
Its the highest metamorphic rock
Identify the types of signals which sensory receptors can detect.
Thanks:)
Answer:
Explanation:
Sensory receptors can be classified by the type of stimulus that generates a response in the receptor. Broadly, sensory receptors respond to one of four primary stimuli:
Chemicals (chemoreceptors)
Temperature (thermoreceptors)
Pressure (mechanoreceptors)
Light (photoreceptors)
Someone plz help I need the soon
Mendel's law of independent assortment is the result of researching how many characteristics at a time?
What happens if an animal cannot get sufficient oxygen?
Answer:
it dies
Explanation:
if an animal (depending on the animal) can not get a sufficient amount of provided oxygen it does due to it not being able to breath.
Answer:
It will suffocate and die.
Explanation:
If humans were not able to get enough oxygen then would die as well
Which event is caused by gravity?
A. Water enters an aquifer through infiltration.
B. Water exits a person through perspiration.
C. Water changes from ice to liquid water through melting.
D. Water moves from the atmosphere to a glass surface through
condensation
Answer:
A
Explanation:
A
Answer:
A
Explanation: took the test
What do you do when a girl says "I'm okay"?
Answer:
She's lying they try to cover it up go comfort her or something just don't go and do nothing or you'll make her mad
Explanation:
Need help ASAP ! Also number 6 ask the following are processes in the water cycle which of these processes are driven by energy from the sun ? Select all the correct answers : a . Run off B. Evaporation C. Percolation D. Melting E. Transportation
Answer:
B. and D. possabily E if transportation is solar powered.
Explanation:
The process that is driven by energy from the sun in the water cycle is evaporation.
The water cycle refer to the processes by which water moves around on earth. The water cycle has has atmospheric, litospheric and hydrospheric components.
Water evaporates when it receives energy, Usually surface water evaporates when energy from the sun is imparted to the molecules of water enabling to escape to the atmosphere.
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The diagrams below illustrate models of various chemical compounds..
How do the test variables (independent variables) and outcome variables (dependent variables) in an experiment compare?
A. The outcome variable (dependent variable) controls the test variable (independent variable).
B. The test variable (independent variable) controls the outcome variable (dependent variable).
C. The test variable (independent variable) and outcome variable (dependent variable) have no affect on each other.
D. The test variables (independent variables) and outcome variables (dependent variables) are the same things.
Answer: B
Explanation:
The independent variable is the experimenter so it changes and controls the dependent variable because it is assumed that the dependent variable gets a direcr effect from the independent variable.
Answer: should be B
Explanation:
A species is a group of organisms so similar to one another that they can breed and produce fertile offspring. True or False.
Answer:
True
Explanation:
That is the exact definition that I learned.
Which of the following are considered disadvantages of an agricultural society?
I. Dependence on a few crops
II. Greater vulnerability to natural events
III. Need for intense physical labor
I only
I and II only
I and III only
I, II, and III
The disadvantages of an agricultural society include dependence on a few crops, greater vulnerability to natural events and need for intense physical labor. The economy of an agricultural society depends on climatic factors.
An agricultural society can be defined as a population where the economy is based on producing extensive crops.
An agricultural society can also be defined when a country is based its economy on agriculture instead of industrialization.
These economies are highly dependent on climatic natural factors which can affect the yield of a limited number of crops (e.g., maize, wheat, soybean, etc).
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ILL GIVE BRAINIEST PLS HELP ITS DUE RLY SOON!! explain how
the geologic processes involved in the formation
of coal, oil, and natural gas cause uneven
distributions on Earth.
Explanation:
RESOURCE LIBRARY COLLECTION
DISTRIBUTION OF NATURAL RESOURCES
Different regions have access to different renewable or nonrenewable natural resources such as freshwater, fossil fuels, fertile soil, or timber based on their geographic location and past geologic processes. Access, or the lack thereof, contributes to a place’s economic development, political relationships, and culture. For example, the Great Plains region of the United States is known for its abundance of fertile soil. As a result, its main industry is agriculture. Corn, soybeans, and wheat are globally exported from this region and serve as the main economy. On the other side of the spectrum, the desert southwestern region of the United States depends on the Central Arizona Project canals to transport water from the Colorado River in order to support agriculture and urban areas. Arizona’s right to use water from this river stems from the Colorado Compact, an agreement established in 1922.
What would be the most likely effect if there was only type of side chain (R group) of an amino acid? (4 points)
The organism would not be able to make and store starches.
The organism would not be able to make more than one type of protein.
The organism would not be able to process glucose molecules effectively.
The organism would not be able to regulate the creation of specialized cells.
Answer:
The organism would not be able to make more than one type of protein.
Explanation:
All amino acids have a standard structure with variation in the R group. They have an amide functional group on one side, and a carboxyl functional group on the other side of the molecule.
The reason we have such diverse types of proteins in our cells is because there are different R groups across the twenty amino acids found in nature. These R groups contain additional elements and form different structures and functions, based on their properties.
If all R groups were the same, then all amino acids would be the same. This would result in only one type of protein, as all proteins are made of chains of amino acids.
Can someone please help me with these 2 questions? ILL GIVE BRAINLIEST
Answer:
1: The higher the force applied to the ball, the harder to make a home run because of the third law: every action has a reaction, the reaction is absorbed by the bat.
2:Same equation: F=MA from the second law, if the ball has a higher mass, it will have a higher force.
Explanation:
The third rule, which states that every action has a response, which is absorbed by the bat, makes it tougher to hit a home run the more power is given to the ball.
Explain Newton's law.Newton's laws of motion are three fundamental physical laws that describe the behavior of objects in motion and how they interact with forces. The laws were first published by Sir Isaac Newton in 1687.
Law of Force and Acceleration - The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. This law is often expressed as F=ma, where F is the net force acting on an object, m is the mass of the object, and a is the acceleration of the object.
Law of Action and Reaction - For every action, there is an equal and opposite reaction. This law states that when one object exerts a force on another object, the second object exerts an equal and opposite force on the first object.
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why is the chemical reaction between nitric acid and sodium hydroxide called the neutralization reaction?
À ________ is a segment of DNA which codesfor a specific trait
Answer:
The answer for the blank is= Gene
Answer:
A gene is a segment of DNA which codes for a specific trait.
Explanation:
Cellular development, replication, and cell repair are controlled by genetic information stored within DNA molecules. The long-chain, helical macromolecules of these deoxyribonucleic acids, are constructed from complex sequences of covalently bonded monomers called nucleotides.
Genes, can span several nucleotides and even multiple chromosomes. They are encoded through the processes of transcription, translation to become proteins, that determine physical characteristics or phenotypes.
In single-celled organisms, materials are stored primarily in
Answer:Vacuole
Explanation:Vacuoles basically do the functions of storage, ingestion, digestion, etc.
