The scientific models always exhibits limitations.
• All the scientific models exhibit limitations as they are not representative of every possible scenario.
• Scientific models are not a substitution for experimentation, they can be used in combination with experimentation to further comprehend a concept, process, or event.
• The scientific models are based on present scientific knowledge and may have to be changed when novel discoveries are made.
Thus, all the scientific models have limitations, the correct answer is option B.
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How does apoptosis relate to cancer cells?
A. In cancer cells, too much apoptosis occurs, resulting in malignant cells that will not undergo programmed cell death.
B. In cancer cells, too little apoptosis occurs, resulting in malignant cells that will not undergo programmed cell death.
C. In cancer cells, apoptosis occurs only when cells grow without proper regulation.
D. In cancer cells, apoptosis occurs only when the cells receive the proper hormones.
Answer:
Apoptosis in Cancer
The loss of apoptotic control allows cancer cells to survive longer and gives more time for the accumulation of mutations which can increase invasiveness during tumor progression, stimulate angiogenesis, deregulate cell proliferation and interfere with differentiation
Many oncogenic stresses, including uncontrolled proliferation or DNA damage, trigger apoptosis; consequently, by culling cells at risk of transformation, apoptosis effectively prevents cancer. Apoptosis also suppresses tumourigenesis in various other ways.
The more malignant the tumour is, the more apoptosis shows. In this study, we propose a new theory that apoptosis plays a key role in the malignant progression and metastasis of cancer. The growth of tumour is the difference between tumour cell proliferation and attrition plus the hyperplastic growth of stroma.
Which of the following are narrow blood vessels that restrict blood flow and have thin walls that allow gas exchange? Alveoli Veins Arteries Capillaries.
Arterioles are narrow blood vessels that restrict blood flow and Capillaries have thin walls that allow gas exchange.
What is blood vessels?Blood vessels are channels that carry blood throughout your body. They help to transport oxygen to vital organs and tissues, and also remove waste products. Blood vessels include veins, arteries and capillaries.
Veins bring blood to the right side of your heart.
Arteries branch into smaller vessels called arterioles. Both arteries and arterioles are very flexible. They get bigger or smaller to help maintain your body's blood pressure.
Capillaries have thin walls that allow oxygen, nutrients, carbon dioxide and waste products to pass through, to and from the tissue cells.
thus, Arterioles are narrow blood vessels that restrict blood flow and Capillaries have thin walls that allow gas exchange.
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Answer:
Capillaries
Explanation:
Capillaries are the tiniest vessels in the circulatory system. If the circulatory system is a network of roads, then capillaries are the side streets and alleyways that go to each building in a city. The majority of capillaries are so thin that blood cells must move through them singly. The thin walls of these confined tanks allow gas exchange.
what is sustainability
Which choice most accurately describes the effect of energy on materials during absorption?
The glass absorbs the visible light wave and reemits its energy as visible light. It absorbs the ultraviolet and infrared waves,
then converts the energy into heat. The temperature of the glass increases due to the absorption.
The glass does not absorb the energy of any of the waves. The ultraviolet, infrared, and visible waves are transmitted
through the glass. The temperature of the glass does not change.
The glass transmits the visible light wave. It also absorbs the ultraviolet and infrared light waves and reemits these waves as
visible light waves. The temperature of the glass does not change.
The glass absorbs ultraviolet, infrared, and visible waves and converted all their energy into heat. The temperature of the
glass increases due to the absorption. None of the light waves were reflected or refracted.
Answer:
The glass absorbs the visible light wave and reemits its energy as visible light. It absorbs the ultraviolet and infrared waves, then converts the energy into heat. The temperature of the glass increases due to the absorption.
Explanation:
An atom with 9 protons and 8 electrons is what kind of atom?
Hint: Cations have more positive charges than negative charges. Anions have more negative charges than positive charges. A neutral atom has the same number of positive charges to negative charges.
A
an anion
B
a cation
C
a neutral atom
Answer:
B. A cation
Explanation:
An atom is the smallest indivisible component of a matter including an element. An atom contains three particles called SUBATOMIC PARTICLES (PROTON AND NEITRON in the nucleus and ELECTRON surrounding the nucleus). The proton is positively charged while the electron is negatively charged.
The number of protons and electrons determine whether an atom will be postively charged (cation) or negatively charged (anion). In this question, an atom with 9 protons and 8 electrons will be A CATION because the protons (9) are more than the electrons (8), hence, making it a positively charged atom (cation).
N.B: The cation atom will have a +1 charge
Hi, you can ignore my previous question however I kindly ask of you to please answer this question,
What activity in excess is least likely to cause cancer?
A.] Smoking ciggies
B.] Sunbathing
C.] Malnutrition
4.] X ray exposure
Answer:
Smoking ciggies is known too cause cancer
Sunbathing has little risk but can cause skin damage, but tanning can cause cancer.
Malnutrition has a a high chance of cancer
X ray expose can but only in really high dosage (not the ones used in hospitals)
Explanation:
I would say that if 4 is talking more about The X ray´s used in hospitals and medical equipment, go with that one.
Pregunta 2 (2 puntos)
The diagram below shows the relationship between ATP and ADP,
ATP
The ATP-ADP Cycle
Energy
from food
Energy for
cellular work
ADP +
Р
What conclusion can be made from this diagram?
Ob
ATP will be broken down into ADP and inorganic phosphate to release energy for cellular work.
ATP absorbs energy when it forms ADP and inorganic phosphate
ADP and inorganic phosphate are never reused,
ATP and inorganic phosphate will join to release energy for cellular work,
Od
ATP is a cellular energy source to do every work, ATP is synthesized during cellular respiration to use this energy for cellular processes, hence option a is correct.
How does ATP is used?During photosynthesis, it is the synthesis of ADP to ATP using solar energy. In the mitochondria of a cell, the process of cellular respiration also leads to the creation of ATP.
ATP gets hydrolyzed into ADP or AMP and produces free inorganic phosphate groups in metabolic activities. Energy-wise, the conversion of ATP to ADP is beneficial, providing a Gibbs-free energy of -7.3 cal/mol.
A series of chemical reactions referred to as cell respiration convert glucose into ATP, which may then be utilized as energy for a variety of bodily functions.
Therefore ATP is broken down into ADP and releases energy to do work for cellular processes, hence option a is correct.
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What is the name of the structure in which protons and neutrons are found?
Proteus
Nucleus
Center
Nucleon
Answer:
Nucleus
Explanation:
Protons and Neutrons are found inside the nucleus of the atom, and the electrons circle the nucleus in electron clouds/orbitals.
Answer: Protons and neutrons are found within the Nucleus.
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What is necessary for a eukaryotic RNA to be recognized and bound by the small subunit of the ribosome
Answer:
Presence of 5' methyl-G cap on the mRNA
please help!!
How do living organisms maintain homeostasis on a cellular level?
Answer:
Hello
To maintain homeostasis, unicellular organisms grow, respond to the environment, transform energy, and reproduce. A single-celled, or unicellular, organism does everything you would expect a living thing to do.
Answer: for living organisms to maintain homeostasis, unicellular organisms grow, react to the environment, convert energy, and reproduce.
Explanation: A single celled, or unicellular organism does everything you would demand a living thing to do.
What might happen if buffers did not exist within the human body?.
Answer:
Our blood and other bodily fluids might become too acidic or basic. Our stomach acid would not be able to break down food.
Explanation:
Answer: Our blood and other bodily fluids might become too acidic or basic. Our stomach acid would not be able to break down food
Explanation:
Why we need to take vaccine?
Answer:
so we are immune to future cancers or viruses we might possibly get
Answer:
Taking the vaccine won't only just protect you and give you immunity to serious, life-threatening diseases, but other people whom you love and care for!
Explanation:
I hope this helps you out! ^^
What is the function of the tube cell?
Answer:
The tube which conveys the male gametes of seed-bearing plants to the ovule.
Explanation:
The cell in the pollen grain that develops into the pollen tube.
apoorwa, What is the function of a nucleus in a plant cell and a endoplasmic reticulum
Answer:
It stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include intermediary metabolism, growth, protein synthesis, and reproduction (cell division).
Explanation: :))
30. ) Most organisms grow by ______.
a.) tissue regeneration
b.) cells getting larger
c.) cell cycle and cell division
d.) osmosis
Acid, mucus, and enzymes are just some of
our
a) chemical defenses
b) specific immune response
c) should be avoided
what is the difference between nucleus and vacuole
Answer:
In cytology|lang=en terms the difference between vacuole and nucleus. is that vacuole is (cytology) a large membrane-bound vesicle in a cell's cytoplasm while nucleus is (cytology) a large organelle found in cells which contains genetic material.
Answer: A nucleus directs activity in a cell whereas the vacuole stores food and wastes in a cell.
What is the name of the chromosomal condition that is the result of an error in meiosis, causing a human to have three copies of chromosome 21?
Answer:
I hope this helps.
Explanation:
In a model of an atom, where would I find a valence electron?
O In the Nucleus
Randomly among the other electrons
On the last energy level
Valence electrons are not found on these models.
You are familiar with some of the factors that have contributed to the rise in global temperatures over the past century. Think of three questions that will help you clarify your understanding of how these factors lead to an increase in global temperatures. Consider the following when you come up with your questions.
Answer:
#1: How has human activity affected temperature change on Earth?
#2: How do greenhouse gases such as carbon dioxide cause global warming?
#3: Why does burning fossil fuel affect the temperature change on Earth?
Explanation:
Hope this helps!!
also for extra ------------Why does burning fossil fuel affect the enfironment. How does the atmosphere play into this all? How do cars affect the global climate?
These play into common terms related to the issue of global warming which I assume is what the question is talking about.
The buoyant force in Newtons at a point on the sphere is?
Answer:
I calculate the buoyancy force as: Volume of the sphere = Volume of the water displaced (Vdisplaced) = (4/3)πr3. Weight of the displaced water = Buoyancy force (B) = Vdisplaced× density of water.
I hope this is what you needed
What is the role of camp in the signal transduction pathway activated by epinephrine?.
Answer:
When activated, adenylyl cyclase converts a large number of ATP molecules into signaling molecules, called cyclic AMP (cAMP). Because cAMP carries the message of the first messenger (epinephrine) into the cell, cAMP is referred to as a second messenger.
Explanation:
Adenylyl cyclase turns a large number of molecules of ATP into the signaling molecules cyclic AMP when it is activated (cAMP). cAMP is referred to as a second messenger because it delivers the signal of the first messenger (epinephrine) into cell.
What is cAMP?Cyclic adenosine monophosphate, often known as cyclic AMP or cAMP, is a tiny, hydrophilic molecule that functions as an essential intracellular second messenger molecule that is controlled in a variety of physiological activities.
It is now understood that cAMP regulates cellular activity in all organisms, including amoebas, plants, and people. The biological functions of memory, metabolism, gene regulation, and immunity are all mediated by this second messenger.
Therefore, Adenylyl cyclase turns a large number of molecules of ATP into the signaling molecules cyclic AMP when it is activated (cAMP). cAMP is referred to as a second messenger because it delivers the signal of the first messenger (epinephrine) into cell.
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~ explain the changes in kinetic energy and potential energy that occur when an apple falls off the table and hits the floor
Answer:
When an apple falls from the tree to the ground, its energy of position (stored as gravitational potential energy) is converted to kinetic energy, the energy of motion, as it falls. When the apple hits the ground, kinetic energy is transformed into heat energy.
Explanation:
Scientific investigations often lead to the formulation of new scientific questions. The observations Charles Darwin's work after he returned home from his voyage prompted him to ask which question?.
-Are the Galapagos finches and people at the mainland equal species.
When Darwin visited the Galapagos islands he determined that the small flocks of finches that existed there have been very much like the finches that existed withinside the mainland of South America besides for his or her beak form and feeding habits.
• This brought about him to invite the query that 'Are the Galapagos finches and mainland finches the equal species?'
• Later on research made it glaring that some corporations of mainland finches migrated to the Galapagos island and occupied unique niches.
They adjusted themselves to the island surroundings and developed with new variations in beak shape and feeding habits.
• They at the moment are labeled into 14 corporations out of which thirteen exist withinside the Galapagos island.
What are finches?The Galapagos finches are divided into 3 corporations: the floor finches, tree finches, and Warbler finches.
Thus it is clear that the observations Charles Darwin's work after he returned home from his voyage.
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What causes mad cow disease and other such spongiform encephalopathies?.
Mad cow disease is an abnormal version of a protein normally found on a prion. This protein becomes altered and destroys nervous system tissue the brain and spinal cord, causing the cow to lose common sense. This reason is still unknown.
The Punnett square illustrates a cross for flower position in the pea plant The phenotypes and genotypes of the parents have been given. The allele for axial position and represented by a. The allele for terminal flower position is recessive and represented by a . What is the genotype of the offspring?
Answer: Recessive
Explanation: 100% recessive
Where is the concentration of sodium higher?
Answer:
On the outside of the membrane.
Explanation:
The results of an experiment often prompt new questions that further scientific investigation can answer. From the results of this experiment, name one new question that a new experiment can answer.
Here is one possible answer:
Do allergen-free pillows cause fewer germs to grow
Answer:
Explanation:
i agree with the answer down below
How is the number of bonds carbon can make related to its ability to form molecules with many different shapes?
because each carbon atom can form four chemical bonds to other atoms and because the carbon atom is just the right or small size to fit in comfortably as parts of very large molecules.
The number of bonds carbon can make is related to its ability to form molecules with many different shapes because: it can form four (4) covalent bonds, rings, straight chains, and wrench chains.
Carbon refers to a non-metallic and tetravalent chemical element which is represented with the chemical symbol C and it has an atomic number (number of protons) of six (6).
Generally, carbon (C) has the ability to form chains that are almost unlimited in length because an atom of carbon can bond to other carbon atoms.
This ultimately implies that, carbon (C) can form molecules with many different shapes as a result of the number of bonds carbon it can make.
Hence, the ability of carbon (C) form molecules with many different shapes is simply because of the following:
Carbon (C) can form four (4) covalent bonds.It can form rings.It can form straight and wrench chains.Carbon (C) atoms can bond to other carbon atoms.Read more: https://brainly.com/question/17574947
energy is realsead when which bonds of ATP are broken?
Hi friend! Hope you find this response helpful! :)
When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate (ADP). Likewise, energy is also released when a phosphate is removed from ADP to form adenosine monophosphate (AMP).