Answer:
If I were studying the causes of cancer, the topic which might interest me is "The topic of spindle-fibre structure.".
Explanation:
In cell division, the accurate segregation of chromosomes is coordinated with the complex structure of spindle fibre in cell. The mitiotic structure is consisted of two apparatus, one is centrosomes and the other is microtubules. Mitiotic spindle is formed during the polymerization process of the microtubules in centrosome. Any kind of disruption in the structure of the microtubules causes aberration in the spindle fibre structure and error in the number of chromosomes. This change is one of the major causes of developing cancer.
What effort do enzymes have on the activation energy of exergonic and endergonic reactions
Activation Energy Of Exergonic Reactions:
A. increase
B. Decrease
C. Increase
D. Decrease
Activation Energy Of Endergonic Reactions:
A. Increase
B. Decrease
C. Decrease
D. Increase
Answer:
Enzymes 'reduces the activation energy' of both Exergonic and Endergonic Reaction by acting as a catalyst.
Explanation:
For example, in the case of 'carbonic anhydrase', enzymes act rapidly causing the chemicals to 'react 107 times faster' than they would normally. Enzymes are substrate specific meaning an enzyme working on one substance may not work on another. Function of the enzyme is identified by its 'shape of the protein' and arrangement of these molecules produces an area called activation site.Enzymes lower the activation energy of both exergonic and endergonic reactions.
Explanation:In biological systems, enzymes play a crucial role in lowering the activation energy of chemical reactions. Activation energy is the energy required to start a reaction. Enzymes facilitate reactions by providing an alternative pathway with a lower activation energy, allowing the reaction to occur more easily and at a faster rate. For exergonic reactions, which release energy, enzymes can help decrease the activation energy. For endergonic reactions, which require energy input, enzymes can still lower the activation energy required for the reaction to proceed.
explain why controlling the proteins in an organism controls the organisms characteristics
Answer:
Controlling the proteins in an organism controls the organism's characteristics because proteins are enzymes, and enzymes catalyze and regulate chemical reactions, and therefore can control certain traits such as color, shape, or even gender.
Explanation:
Controlling the proteins in an organism regulates the organism's characteristics because translation regulates the protein expression of cells based on DNA sequences and eventually the characters are expressed.
What is the importance of protein expression?In general, the cell has genetic contents that are expressed in terms of transcription and translation, and here these are called the fundamental processes of the cell as they are required by the cells for enzyme formation, synthesis of the receptors, membrane protein, and expression of the traits. If the translation is regulated, then the message present in the DNA is also regulated, and the protein expression can be controlled.
As a result, controlling the proteins in an organism regulates the organism's characteristics because translation regulates the protein expression of cells based on DNA sequences and eventually the characters are expressed.
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1. Igloos are buildings that are made of packed
snow. Which statement describes the particles
that make up the igloo?
(A) The particles in the snow have no kinetic
energy
(B) The particles in the snow are not attracted to
one another.
(C) The particles in the snow have some kinetic
energy, but the particles only move around in
place.
(D) The particles in the snow melt easily because
they have more kinetic energy than liquid
water.
The particles of the snow have kinetic energy, but being a solid, it has less kinetic energy than that of liquid water. So they move around in a place about its mean position.
Option C
Explanation:Igloos are the small homes made up of snow. It used to be homes for the people living in Arctic regions in past. Now some tribes still live in these igloos, or they are made by tourists for amusements.
Snow is basically precipitation of ice from clouds. Being the solid form of water, ice has molecules more compactly arranged in its crystal structure. Thus, the molecules cannot move here and there like in fluid. But having some kinetic energy, they have certain movements i.e vibrations around its mean position.
Examine the soil profile and use the drop-down menu
to select what each label identifies
Label o~
Label A~
Label B~
Label C~
Answer:
Answer: label O: organic material
Label A: topsoil
Label B: subsoil
Label C: weathered rock
Explanation:
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Each year, earthworms move deep into soil during fall and winter and return toward spring and summer. what is the likely stimulis for this behavioral response
Each year, earthworms move deep into soil during fall and winter and return toward spring and summer. The likely stimulis for this behavioral response are relative humidity & temperature. Since the nematode breathes via the skin, the mucus coating may become dry & the organism would die if exposed to extreme cold & dryness.
If the concentration of hydrogen ions (H+) outside of the thylakoids were equal to the concentration of H+ inside the thylakoids, how would it affect the chloroplasts?
The chloroplasts would release excess O2.
The chloroplasts would be unable to generate ATP.
The chloroplasts would make more glucose molecules.
The chloroplasts would make more NADPH than usual.
The chloroplasts would be unable to generate ATP
If the concentration of hydrogen ions (H+) outside of the thylakoids were equal to the concentration of H+ inside the thylakoids, the chloroplasts would be unable to generate ATP
Explanation:
As the high-energy electron from the reactive center of the photosystem conveyed from one protein to another in the protein transport chain of the chloroplast, the energy harnessed from the electron is used to pump H+ ions into the thylakoid lumen against concentration gradient.
The proton motive force created by having a high concentration of H+ ion in the thylakoid lumen than outside is to enable the creation of potential energy that is tapped by ATP synthase to create ATPs in a process called photophosphorylation. The ATPs made in this light stage is used in the anabolic process of the dark stage to make glucose through the reduction of CO2
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Why does a cell need to make RNA
Answer:
When the cell needs to produce a certain protein, it activates the protein's gene–the portion of DNA that codes for that protein–and produces multiple copies of that piece of DNA in the form of messenger RNA, or mRNA. ... We now know that RNA can also act as enzymes (called ribozymes) to speed chemical reactions.
Explanation:
When the cell needs to produce a certain protein, it activates the protein's gene–the portion of DNA that codes for that protein–and produces multiple copies of that piece of DNA in the form of messenger RNA, or mRNA. ... We now know that RNA can also act as enzymes (called ribozymes) to speed chemical reactions.
explain the types of acid deposition
Answer:
Acid deposition-usually referred to simply as acid rain-actually includes two forms of pollution, wet and dry. ... In the wet type of acid deposition, these compounds combine with water vapor in the atmosphere to form highly corrosive sulfuric and nitric acids.
Explanation:
The accumulation of acids or acidic compounds on the surface of the Earth, in lakes or streams, or on objects or vegetation near the Earth's surface, as a result of their separation from the atmosphere. Acid deposition can harm the environment in a variety of ways, as by causing the acidification of lakes and streams, the leaching of minerals and other nutrients from soil, and the inhibition of nitrogen fixation and photosynthesis in plants.♦ The accumulation of acids that fall to the Earth dissolved in water is known as wet deposition. Wet deposition includes all forms of acid precipitation such as acid rain, snow, and fog.♦ The accumulation of acidic particles that settle out of the atmosphere or of acidic gases that are absorbed by plant tissues or other surfaces is known as dry deposition.
Answer:
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Acid deposition-usually referred to simply as acid rain-actually includes two forms of pollution, wet and dry. ... In the wet type of acid deposition, these compounds combine with water vapor in the atmosphere to form highly corrosive sulfuric and nitric acids.
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what organic molecules are in chicken
Answer:
Organic molecules present in chicken are Nucleic acid, proteins, carbohydrate and lipids .
Explanation:
Chicken itself has the all four organic molecules in it. Organic molecules are those having carbon in it. They are attached by covalent bonds, in which electrons are being shared within the atoms. The nucleic acids are DNA and RNA which helps in the making of the proteins which are found in the various structure and ought to perform various metabolic functions. Proteins are the building block of the amino acids. Lipids found are the fat bodies, burning of lipids gives us energy.
Chicken contains organic molecules such as proteins, lipids, carbohydrates, and nucleic acids, which are essential for various biological functions and nutritional needs. The nutritional value of chicken can vary depending on farming practices, which can alter the balance of these nutrients, like omega-3 fatty acids.
Explanation:The organic molecules found in chicken include a variety of biomolecules essential for life. Some of the primary categories of these organic molecules are proteins, lipids, carbohydrates, and nucleic acids. Proteins in chicken not only serve as a major source of dietary amino acids for building and repairing tissues but also play roles in various biological functions like enzyme and hormone activities.
Chickens are also a source of lipids, which include fats that are important for energy storage and hormonal functions. Carbohydrates present in chicken are generally found in small quantities and include glycogen, which is a stored form of glucose. Nucleic acids, like DNA and RNA, are present in every cell and are responsible for genetic information and protein synthesis.
Furthermore, chickens produce glycosylated proteins, adding the correct sugars to these proteins. Modern farming practices have influenced the nutritional composition of chicken, altering levels of essential nutrients like omega-3 fatty acid. It has been observed that intensively raised chickens now have higher fat content compared to their protein content, with reduced amounts of omega-3 fatty acids compared to chickens raised in the past.
what are the masses (in kilograms) of the three objects in the Gizmo? potential shelves gizmo answer
The masses of the objects on the Gizmo for 14 N object is 1.42 kg, 80 N object is 8.16 kg and 98 N object is 10 Kg
How do we explain?mass, in physics, is described as the quantitative measure of inertia, a fundamental property of all matter.
The masses of the objects on the Gizmo can be calculate as follows:
W= m x g
where w=
the weight,
m is the mass and
g is acceleration of gravitation
W= m x g
14N = m x 9.8
m = 14/ 9.8
m = 1.42 kg
for the 80N Object
W= m x g
80N = m x 9.8
m = 80/ 9.8
mass = 8.16 kg
for the 98N Object
W= m x g
98N = m x 9.8
mass = 98/ 9.8
mass = 10 kg
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complete question:
An object’s weight is determined by its mass (m) and the acceleration due to gravity (g) affecting that object: w = mg. On Earth, g = 9.8 m/s 2 .
What are the masses (in kilograms) of the three objects on the Gizmo? (Note: 1 N = 1 kg m/s ²). 14 N object,80 N object,98 N object.
Which increases genetic variation?
A. Natural selection
B. Genetic drift
C. Stabilizing selection
D. Mutations
Answer:
D
Explanation:
It is D because they can reorganize the chromosomes.
Mutations increase genetic variation due to changes in DNA. Therefore, option D is correct.
What are mutations?Mutations are changes in the DNA sequence that can occur spontaneously or due to exposure to environmental factors such as radiation, chemicals, or viruses. Mutations can affect a single nucleotide (a change in a single base pair), a small segment of DNA, or a larger portion of a chromosome.
Mutations can occur during DNA replication, meiosis, or exposure to mutagens. They can be beneficial, harmful, or neutral to an organism's survival and reproduction.
Some mutations can result in new genetic variations that provide an advantage in a certain environment. Other mutations can cause genetic disorders or increase the risk of certain diseases. Therefore, option D is correct.
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All organisms start as one unique cell. True or False
Answer:
True
Explanation:
We all begin existence as the simplest thing you can imagine if you're trying to picture life: a single cell--nothing, in other words, but a tiny, spherical bag of proteins. In fact, the average one-celled amoeba looks far perkier under a microscope than a fertilized human egg
which level of classification contains the largest number of organisms
Answer:
Kingdom, sorry if its wrong! I hope this helped!
Why is a dichotomous key called a dichotomous key?
Answer:
The name comes from the Greek “di” for “two” and “tome” for “cutting instrument.” As the name suggests, a dichotomous key arrives at the answer to species identification by presenting a series of questions with two possible answers.
Explanation:
You will understand better with the picture.
A dichotomous key is called so because it presents a series of two opposite choices (dichotomies) at each step to classify and identify organisms.
A dichotomous key is a systematic tool used by biologists and taxonomists to identify and classify organisms based on their observable characteristics. It is designed as a series of paired statements or questions, where each pair represents two opposite characteristics of the organisms being studied. The user must choose the statement that best matches the observed characteristics of the specimen they are trying to identify.
At each step of the key, the user makes a choice between the two options, leading them to the next set of characteristics that narrows down the possibilities. This process continues until the user reaches a specific name or classification for the organism.
The term "dichotomous" comes from the Greek word "dichotomia," which means division into two parts. The key's structure of presenting two opposing choices at each step helps to simplify the identification process and efficiently categorize organisms into specific groups based on their shared characteristics.
Dichotomous keys are widely used in various scientific fields, including biology, botany, zoology, and ecology, to identify and classify organisms in a structured and organized manner. They are valuable tools for researchers, students, and anyone involved in the study of living organisms.
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Which scientist developed a theory that describes how light interacts with gravity?
A. Albert Einstein
B. Edwin Hubble
C. Georges Lemaitre
D. James Clerk Maxwell
Answer:
Albert Einstein
Explanation:
Albert Einstein developed a theory that describes how light interacts with gravity.
Answer: Albert Einstein
Explanation:
Discuss the law of segregation and explain why each organism has two copies of gene for each trait expressed
Answer:
The explanation is provided in the explanation section
Explanation:
Gregor Mendel, who was referred to as the FATHER OF GENETICS discovered the principles that governs heredity in his several experiments. He observed that, for a particular trait, an organism receives two copies of a gene called ALLELE. This two copies are contributed by each parent in gametes during reproduction. An allele is a contrasting form of a gene, that is responsible for a particular trait of that gene.
For example, the height gene possesses two alleles T and t, which is responsible for a tall and short trait respectively. In an organism, two copies od this height gene will be present either same or different depending on which allele is contributed by each parent. This explains why a diploid organism possesses two alleles for a specific gene.
One of the principles of heredity discovered by Mendel is the LAW OF SEGREGATION, which states that the alleles of a gene will separate into gamete during gamete formation (meiosis). Mendel stated that only one form of a gene (allele) will be found in each gamete. For example, in an organism with Tt genotype, the gametes produced by this organism will either contain T or t allele.
The Law of Segregation states that genetic traits are split during gamete formation, producing offspring with two copies of each gene, one from each parent. This is due to the fact that most organisms are diploid, having two sets of chromosomes from both parents.
Explanation:The Law of Segregation, also known as Mendel's first law, states that during the formation of reproductive cells (eggs and sperm), pairs of genetic traits are separated or segregated from each other. This means each parent contributes one copy of the gene for each trait, resulting in the offspring having two copies of the gene - one from each parent. These copies then randomly assort into gametes, maintaining genetic variation.
As to why each organism has two copies of a gene, this is attributed to the fact that organisms are diploid. A diploid organism has two sets of chromosomes, one set from the mother and one from the father, and consequently, two copies of each gene. These genes often have slight variations, leading to diversity in traits like eye color, skin color, and so on.
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ATP molecules, which are used for energy by cells, are built during all three stages of cellular respiration.
Which stage of cellula
respiration generates the most ATP molecules?
A.The Krebs cycle
B.Glycolysis
C.The electron transport chain
D.Fermentation
Answer:
The answer is C. The electron transport chain
Explanation:
Glycolysis involves the conversion of one glucose molecule into 2 molecules of pyruvate with the production of 2 ATPs and 2 molecules of NADH2. The molecules of NADH are used in the electron transport chain to produce more ATPs.The Kreb's cycle produces 2 ATP, 8 NADH and 2 FADH2.The electron transport chain converts 10 NADH and 2 FADH2 to produce 34 ATPs and 2 GTPs to yield another 2 ATPs.In total, one molecule of glucose yields 36 ATP molecules upon respiration.* Each NADH yields a total of 3 ATP molecules whereas each FADH2 yields 2 ATPs.
Why is taxonomy important?
Answer:
Taxonomy is the branch of science concerned with classification (like organisms)
Explanation:
Classification is a HUGE part of science..
What is science without classification because classification is like evidence..
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What symptoms do deer with CWD have?
Answer:
Explanation:
Symptoms of infected animals include emaciation, excessive salivation, lack of muscle coordination, difficulty in swallowing, excessive thirst, and excessive urination. Subtle behavioral changes like loss of fear of humans or other abnormal behavior are often the first signs noticed.
Chronic Wasting Disease (CWD) in deer has symptoms such as weight loss, excessive salivation, drooping ears, lack of coordination, and behavioral changes.
Explanation:Chronic Wasting Disease (CWD) is a disease that affects deer and elk. The symptoms of CWD include weight loss, excessive salivation, drooping ears, lack of coordination, and behavioral changes such as decreased interactions with other animals. Infected deer may also have a blank or staring expression and may stand in water for long periods of time.
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If a organism has a diploid number of 44, how many
chromosomes does it have? *
Answer:
46
Explanation:
Pesticide use in other countries
still represents a danger to us in
Canada. Why?
Answer:
I think it may be because of the possibility of the pesticides traveling to Canada by food and crops so it good still harm people there.
Which of the following types of reproduction is most likely to result in a rapid growth in population?
A.
neither asexual reproduction nor sexual reproduction
B.
asexual reproduction or sexual reproduction
C.
asexual reproduction
D.
sexual reproductionWhich of the following types of reproduction is most likely to result in a rapid growth in population?
A.
neither asexual reproduction nor sexual reproduction
B.
asexual reproduction or sexual reproduction
C.
asexual reproduction
D.
sexual reproduction
Final answer:
Asexual reproduction is most likely to result in a rapid growth in population.
Explanation:
The type of reproduction that is most likely to result in a rapid growth in population is asexual reproduction. Asexual reproduction involves the production of offspring without the need for a mate, and it can occur through various methods such as binary fission, budding, or fragmentation. Since asexual reproduction does not require the time and energy needed to find a mate, it can lead to a rapid increase in population size under favorable conditions. For example, bacteria can reproduce through binary fission, where a single cell divides into two identical cells. Each of these cells can then divide again, resulting in exponential population growth.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being
white?
a. 0%
b. 25%
C. 50%
d. 75%
e. 100%
The probability of an offspring being white in the given scenario, assuming heterozygous parents, is 25%, as calculated using a Punnett square.
Explanation:The probability of an offspring being white in the given plant species, where purple (P) is dominant over white (p), can be determined by creating a Punnett square. If we assume both parents are heterozygous (Bb), the Punnett square would have one quarter (bb) representing white flowers. Therefore, there is a 25% chance that an offspring will have white flowers (rr). The other three quarters would result in purple flowers because of the dominant purple allele (P), showing a 3:1 ratio of purple to white.
Which best describes a gamma ray?
A.an energy ray with no mass and no charge
B.a positively-charged ray of light and protons
C.a negatively-charged ray of light and electrons
Answer:
C.a negatively-charged ray of light and electrons
Final answer:
A gamma ray is best described as an energy ray with no mass and no charge, and is a type of high-energy electromagnetic radiation.(Option A)
Explanation:
The correct answer to the question 'Which best describes a gamma ray?' is A. an energy ray with no mass and no charge. Gamma rays are a form of electromagnetic radiation, similar to X-rays, but with higher energy. They are represented by the symbol γ, and unlike alpha or beta particles, gamma rays are not particles, but rather high-energy photons. As such, they have no mass and carry no electric charge.
Gamma rays possess tremendous penetration power, capable of passing through several inches of material, like lead, or even the human body, without being absorbed or deflected. Given their lack of ionizing power compared to alpha or beta particles, they have the greatest ability to penetrate matter.
6. Read the statement from a scientific researcher. Many organisms depend on other organisms to live,
such as bacteria that live inside cells, and fungi that form parasitic relationships. These organisms are
reliant on their hosts to complete their life cycles. Viruses also rely on host cells in a similar manner.
Which argument about viruses is supported by the researcher's statement?
(a) Viruses create new host cells.
(b) Viruses respond to their environments.
(c) Viruses are nonliving.
(d) Viruses are living.
the argument that the researcher supports in this statement is that the Viruses are nonliving
Answer : Option C
Explanation:
Viruses are organic structures and they are often termed as "organisms at the end of life". Virus is not considered a living as it does not have a biological machinery to replicate.It is a parasite and it needs a host to replicate.
The virus tries its entry through the wounds, respiratory tracts and by passing through insects.
The complete virus particle is known as virion which consists of a nucleic acid surrounded by a capsid, Virus first attach themselves to a host through their surface.
A commuter airplane must make two stops before reaching its final destination. From its origin, the plan flies 300 miles west to reach its first destination, and 400 miles north to reach its second destination. Finally, it flies 700 miles east to reach its final destination. What is the straight-line distance between its origin and its final destination?
565. 685 miles
Explanation:
The description of the vector of the plane travel forms a trapezoid shape as shown in the attached diagram. The requested vector distance is the hypotenuse of the right-angled triangle on the right. We understand that to get hypotenuse we use the formula;
a² + b² = c²
400² + 400² = c²
c² = 320,000
c = 565. 685
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What does the sequence of nucleotides in DNA code for?
PLZ HELP ASAP!!!! I WILL GIVE BRAINLIEST!!!
Answer it would be the bird
HELP ME ASAP!! WILL GIVE BRAINLIEST.
• Match the terms on the left to the terms on the right...... Write in the terms.
Cells
Word Bank
No Nucleus-
A. Energy Created
Nucleus
B. Energy Required
Ribosome-
C. Eukaryote
Mitochondria-
D. No Energy Needed
Golgi Body
E. Osmosis
Endoplasmic Reticulum
F. Package & Sort
Cell Membrane-(Somethings in/out)
G. Plant Cells
Chloroplast Photo Sunthesi
H. Photosynthesis
Cell Wall, Chloroplast, Large Vacuole-
I. Prokaryote
Active Transport
J. Protein Synthesis
Passive Transport-
K. Semi-Permeable
Diffusion of Water-
L. Transport (ER)
Answer:
A. Energy Created Mitochondria
B. Energy Required Active Transport
C. Eukaryote Nucleus
D. No Energy Needed Passive Transport
E. Osmosis Diffusion of Water
F. Package & Sort Golgi Body
G. Plant Cells Cell Wall, Chloroplast, Large Vacuole
H. Photosynthesis Chloroplast
I. Prokaryote No Nucleus
J. Protein Synthesis Ribosome K. Semi-Permeable Cell Membrane- (Somethings in/out)
L. Transport (ER) Endoplasmic Reticulum
Explanation:
This question is based on different organelles and their functions:
A. Mitochondria is the power house of the cell; it creates energy for all life processes.
B. Active transport is a transport system in the cell that requires energy to transport substances from lower to higher concentration.
C. Eukaryotes is a classification term for organisms that have a nucleus.
D. Passive transport is a transport system that does not require energy to transport substances from higher to lower concentration.
E. Osmosis is the process of diffusion of water from low solute/high water concentration to high solute/ low water concentration.
F. Golgi body is a cell organelle responsible for packaging and transport of substances in the form of vesicles.
G. Plant cells have a cell wall, chloroplasts and large vacuoles.
H. Photosynthesis occurs in the chloroplast of plant cells.
I. Prokaryotes is a classification term for organisms that don't have a nucleus.
J. Ribosomes are cell organelles responsible for protein synthesis.
K. The cell membrane is semi-permeable i.e. it allows specific molecules/substances to enter while stopping others.
L. Endoplasmic reticulum helps in protein and vesicle transport.
true or false
Protozoans are the only organisms that can convert nitrogen from the air into chemical compounds that plants can use.
If false what is it
Answer:
The above statement is false.
Explanation:
Protozoans are not the organisms that can convert nitrogen from the air into chemical compounds that plants can use.
Bacteria and archaea are organisms that can convert nitrogen from the air into chemical compounds that plants can use. Organisms which can convert nitrogen to forms that can be used by plants such as ammonia are known as diazotrophs. Examples of such kind of organisms include Rhizobia and azospirillium.