Answer:
Water is a polar molecule because of its unequal sharing of electrons.
Answer:
The reason why Water is considered a polar molecule is because of Unequal sharing of electrons.
Explanation:
This makes the oxygen end of the molecule slightly negative. Since the electrons are not near the hydrogen end as much, that end is slightly positive. When a covalent bonded molecule has more electrons in one area than another, it is called a polar molecule.
select the cell cycle impairments that you predict would lead to cancer. recall that cancer arises from unregulated, repeated cell divisions. choose all that apply.
Cancer cells can arise in a variety of ways, the most common, however, tends to be genetic mutations.
Genetic mutations can occur during the life of a cell due to outside factors such as:
The food we eatThe environment we expose the cell toThe substances that touch the cell (e.g skin cells)That being said, the most common time for a genetic mutation to take place is during cellular division. During this time the DNA that encodes the cells is duplicated. Genetic mutations in this DNA sometimes cause the elimination of programmed cell death.
Programmed cell death is what tells a cell when it should stop growing and dividing. This is a regulatory function designed to keep the number of cells at a balance, growing only when needed. As this cell multiplies, this produces an increasing number of cells that will not die. The accumulation of these cells is referred to as cancer.
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What features are present in both a plant cell and bacterial cell
Answer:
organelles , Plasma membrane, cytoplasm, ribosomes
Explanation:
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_____ splits water into 1/2 O2, H , and e- . A structure of a thylakoid. Letters from A to E indicate definite structures. Letter A indicates the first protein complex located in the thylakoid membrane. Letter B indicates a multiprotein complex between two complexes A and C. Letter C marks the second integral membrane protein complex. Letter D marks a substance inside the thylakoid. Letter E indicates a flask-shaped structure in the membrane of the thylakoid, which has a canal through the membrane. D B C A E
The luminous reactions begin when light reaches photosystem II. The water molecules provide electrons to the photosystem, releasing oxygen and protons. The letter A represents photosystem II that splits water.
-----------
1. Luminous energy is trapped by chlorophyll in Photosystem II.
2. When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
3. The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
4. When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules.
5. Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
6. When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II.
7. When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
8. The released energy is used to produce ATP molecules.
9. Hydrogen ions go back from the stroma to the thylakoid compartment.
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what is the difference between inorganic and organic compounds?
Answer:
Organic compounds always have a carbon atom while most of the inorganic compounds do not contain the carbon atom in them .
Explanation:
Answer:
The primary difference that lies between these organic compounds and inorganic compounds is that organic compounds always have a carbon atom while most of the inorganic compounds do not contain the carbon atom in them. Almost all the organic compounds contain the carbon-hydrogen or a simple C-H bond in them. Explanation:
blood is taken to the lungs to become oxygenated and returned to the heart before being pumped through the body. which blood vessels carry blood away from the heart?
Answer:
arteries
Explanation:
Arteries carry blood Away from the heart, and veins carry blood towards the heart.
in the figure, which number represents dna synthesis?
The number that represents DNA synthesis in the figure would be II.
DNA synthesis happens at the S phase in the interphase of the cell cycle, just after the G1 or cell growth phase and before the G2 or protein synthesis phase.
During the S phase, the amount of DNA in the cell doubles as replication of DNA takes place. However, the number of chromosomes remains constant.
The doubling of the amount of DNA is responsible for the sharp rise in the line that represents the amount of DNA in the figure. Thus, the region of a steep rise in the amount of DNA would represent the DNA synthesis phase.
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1. State Mendel's Law of Inheritance.
2. What are the two alleles for flower color in snapdragon?
3. State the Law of Non-Mendelian Inheritance in snapdragon.
Answer:
1
Explanation:
he was able to find chromosomes in plants
Gregor Mendel's research on pea plants led him to the fundamental ideas of inheritance. He came to the conclusion that genes are inherited as distinct, paired units from each parent.
What is Non-Mendelian Inheritance?
Inheritance of features with a more complicated genetic base than one gene with two alleles and total dominance is referred to as non-Mendelian inheritance.
One allele may not always be dominant over another, resulting in a phenotype that falls between the two parents in certain people.
Incomplete dominance is the name given to this inheritance pattern. Snapdragon flowers, for instance, exhibit partial dominance.
When both alleles are present at the same time, this pattern of inheritance is referred to as partial dominance, since neither allele is totally dominant over the other.
Therefore, red and white snapdragons cross to produce exclusively pink progeny.
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What is a sister chromatid?
1. a full-sized singular chromosome
2. an irregularly divided chromosomes
3. a complete duplicated chromosome
4. half of a duplicated chromosome
Answer:
4. half of a duplicated chromosome
Explanation:
in mitosis,when a cell splits its called a sister chromatid
which molecule is important in regulating cell membrane fluidity?
Answer:
cholesterol plays a distinct role in determining membrane fluidity.
Cholesterol has a specific impact on how fluid a membrane is. With their polar hydroxyl groups adjacent to the hydrophilic head groups of the phospholipids, cholesterol molecules enter the bilayer.
How does cholesterol regulate cell membrane fluidity?The phospholipid bilayer's random distribution of cholesterol molecules aids the bilayer's ability to remain fluid under a variety of environmental conditions.
Cells control membrane fluidity by modifying the lipid composition of the membrane. A lipid bilayer's fluidity fluctuates according to temperature. Lipid bilayers become more fluid, porous, or leaky at increasing temperatures (like butter melting on a hot day).
Cholesterol makes the cell membrane less fluid at higher temperatures and more fluid at lower temperatures.
Therefore, cholesterol is the chemical in the plasma membrane that has an impact on the fluidity of the membrane.
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what is the identity of the planets ?
a:
b:
c:
d:
Answer:
A - Jupiter
B - Neptune
C - Saturn
D - Uranus
hope that hepled :DD
which photoreceptor cells respond to very dim light?
the cells known as "Rods"
can a chemical that blocks cytokinesis affect the cell cycle
What is evaporation?
Answer:
When liquid turns into vapor
Explanation:
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A liquid turning into a gas is evaporation. It is how water gets from the surface of the Earth to the atmosphere.
Temperature, surface area, wind speed, and humidity affect a liquid's evaporation rate.
Latent heat is a form of energy held in the evaporated water when it evaporates and cools.
Most of the air's moisture evaporates from rivers, lakes, seas, and oceans. Water at the surface of the Earth evaporates into water vapor, which rises into the sky and forms clouds, which eventually release water back onto Earth as precipitation.
What has occurred when a solid forms out of the mixing of two liquids in a chemical reaction?meltinggas formationcombustionprecipitate formation
Answer:
when two liquids don't mix together in a chemical reaction it is called a precipitate
Which phrase describes a nuclear chain reaction?(1 point) a series of reactions in which particles from one reaction trigger the next reaction a reaction in which small nuclei combine into a larger nucleus a reaction in which particles spontaneously emit radiation a type of reaction which only takes place in the sun and other stars
please help
Answer:
series of reactions in which particles from one reaction trigger the next reaction.
Explanation:
If your a connexus student here for the Modeling Nuclear Processes Quick Check, here are the answers!
1-the process by which small nuclei combine into a larger nucleus
2-a series of reactions in which particles from one reaction trigger the next reaction
3-disturbing a drop of water such that it breaks into smaller droplets
4-popping a bag of popcorn
5-The resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Hope this helps! Good Luck!
A nuclear chain reaction happens when a single nuclear event averages out one or more further nuclear reactions, opening the door for a potentially endless chain of similar processes. Therefore, option (A) is correct.
What is a nuclear chain reaction ?A nuclear chain reaction happens when the output of one nuclear reaction triggers the occurrence of further nuclear reactions. These cascade reactions are nearly invariably a succession of neutron-excessive fission events. The moniker "chain reaction" comes from the fact that these extra neutrons have the potential to trigger more fission events. The functioning of nuclear power plants depends on nuclear chain reactions.
About a million times more energy is released during nuclear reactions than during chemical ones. Every fission event must result in precisely one additional fission event in order for a nuclear chain reaction to continue.
Therefore, option (A) correctly describes the nuclear reaction.
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The descriptions below explain two ways that water is used by plants on a sunny day.
I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves.
II. Plants use some of this water in leaves in a process called photosynthesis. During photosynthesis, water and carbon dioxide break apart and recombine to form two new substances, oxygen, and glucose.
Based on the above description of transpiration and photosynthesis, which type of change happens to water during each process?
A. In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.
B. In transpiration, because some of its properties change, water undergoes a chemical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a physical change.
C. In transpiration, because its physical properties change, water undergoes a physical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a chemical change.
D. In transpiration, because its chemical properties change, water undergoes a chemical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a physical change.
Answer:
I thinks its A but not 100%
Explanation:
How long can fingerprints stay on plastic if stored correctly?
Answer:
over 7 yrs...............
which animal was the first to be domesticated by early humans?
Answer:
it is dog because the dog is the best friend of the human
Answer:
Goats
Explanation:
Goats and/or sheep were the first animals to be domesticated by early humans.
How does the evolution of resistance in bacteria affect humans
Answer:
Bacteria, not humans or animals, become antibiotic-resistant. These bacteria may infect humans and animals, and the infections they cause are harder to treat than those caused by non-resistant bacteria. Antibiotic resistance leads to higher medical costs, prolonged hospital stays, and increased mortality.
Explanation:
what type of protein is a collagen?
A fact is a statement or assertion of information that can be vairifired.
True
Or
False
Answer:
Your answer to this question is true! I hope this helps!
Why does a plant produce more sugar after summer?
Answer:
Sunlight = Energy
Explanation:
Plants have chlorophyll that uses sunlight from the sun to create energy.
The energy is then used to change carbon dioxide from the air into sugars like glucose. The plant transports sugars into the tissues like roots, flowers and fruits so it can grow.
Answer:
Plants have chlorophyll that uses sunlight to gather energy. The energy is then used to change carbon dioxide from the air into sugars like glucose and fructose. ... They transport sugars throughout the plant and supply it to tissues like roots, flowers and fruits that depend on this sugar to grow.
Explanation:
Explain how products produced by photosynthesis relate to those used by respiration.
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
Explanation:
why is the smooth endoplasmic reticulum unable to synthesize proteins?
Answer:
Why is the smooth endoplasmic reticulum unable to synthesize proteins? No ribosomes are attached to its surface. The liver is involved in detoxification of many poisons and drugs. ... Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules
Explanation:
what are restriction fragment length polymorphisms?
Answer:
difference in homologous DNA sequences
Explanation:
Restriction Fragment Length Polymorphism (RFLP)is a difference in homologous DNA sequences that can be detected by the presence of fragments of different lengths after digestion of the DNA samples in question with specific restriction endonucleases.
how are rain patterns different near warm and cold fronts?
Answer:
rain near a cold front occurs over a smaller spatial area and is more intense than near a warm front
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Explanation:
which example is one specific form of simple diffusion?
Answer:
What is one specific form of simple diffusion? If water moves into a cell by osmosis, it is moving into an area of higher solute concentration. Why is diffusion important to cells? It helps maintain the balance of materials needed for survival, such as oxygen and water.
Explanation: Hope this helps!!!
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Word bank: prediction, results, question,
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An object has a mass of 26kg has a force of 19N applied to it.
What is the resulting acceleration of the object?
Show your work
Answer:
f=ma
so if we are finding acceleration, we divide force by mass to get the acceleration which can be 19/26 which gives 0.73 as resulting acceleration
Hope it helps
When an object has a mass of 26kg has a force of 19N applied to it then the resulting acceleration of the object would be 0.73 meters/second².
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum. The mathematical expression for Newton's second law is as follows,
F = ma
As given in the problem, when an object has a mass of 26kg has a force of 19N applied to it then we have to find the resulting acceleration of the object,
mass= 26 kilograms
force = 19 Newtons
Force = mass×acceleration
19 Newtons = 26 × acceleration
acceleration = 19/26
= 0.73 meters/second²
Thus, the resultant acceleration of the object would be 0.73 meters/second².
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During the replication of DNA:
A. both strands of the DNA molecule act as templates
B. only one strand of DNA acts as a template
C. the cell also undergoes mitosis
D. the reaction is catalyzed by RNA polymerase
Answer:
A
Explanation:
Both strands of the DNA molecule act as templates
Both strands will be divided and then used to make two new DNA strands, each with half of the original
During DNA replication, the two strands of the DNA molecule act as templates. Because the fret has been divided into two pieces, each new DNA strand contains half of the original strand.
What is DNA?DNA, or deoxyribonucleic acid, is the molecule that carries the genetic material required for an organism's growth and operation. DNA has a double helix structure, which is made up of two connected strands that loop around one another to form a twisted ladder.Depending on your parents, half of your genome is inherited from your mother and half from your father. The information molecule is DNA. It stores instructions for the production of larger molecules known as proteins. These instructions are stored within each of your cells and are distributed across 46 long structures known as chromosomes. These chromosomes are composed of thousands of shorter DNA segments known as genes.To learn more about DNA refer to:
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