Answer:
97 percent
Explanation:
Science
Answer:
below
Explanation:
Over 97 percent of the earth's water is found in the oceans as salt water. Two percent of the earth's water is stored as fresh water in glaciers, ice caps, and snowy mountain ranges. That leaves only one percent of the earth's water available to us for our daily water supply needs.
Cancer cells are essentially cells out of control. They continuously go through Mitosis without stopping causing them to crowd other cells and eventually growing on top of each other forming a lump commonly referred to as a tumor. Based on your knowledge of mitosis what is one way you could develop a drug to treat cancer?
Include in your answer a detailed explanation of what you would do and why (5pts) also include labeled diagrams with your solution (5pts).
Answer:
Introduction
Does cell cycle control matter? If you ask an oncologist – a doctor who treats cancer patients – she or he will likely answer with a resounding yes.
Cancer is basically a disease of uncontrolled cell division. Its development and progression are usually linked to a series of changes in the activity of cell cycle regulators. For example, inhibitors of the cell cycle keep cells from dividing when conditions aren’t right, so too little activity of these inhibitors can promote cancer. Similarly, positive regulators of cell division can lead to cancer if they are too active. In most cases, these changes in activity are due to mutations in the genes that encode cell cycle regulator proteins.
Here, we’ll look in more detail at what's wrong with cancer cells. We'll also see how abnormal forms of cell cycle regulators can contribute to cancer.
What’s wrong with cancer cells?
Cancer cells behave differently than normal cells in the body. Many of these differences are related to cell division behavior.
For example, cancer cells can multiply in culture (outside of the body in a dish) without any growth factors, or growth-stimulating protein signals, being added. This is different from normal cells, which need growth factors to grow in culture.
Cancer cells may make their own growth factors, have growth factor pathways that are stuck in the "on" position, or, in the context of the body, even trick neighboring cells into producing growth factors to sustain them^1
1
start superscript, 1, end superscript.
Diagram showing different responses of normal and cancer cells to growth factor presence or absence.
- Normal cells in a culture dish will not divide without the addition of growth factors.
- Cancer cells in a culture dish will divide whether growth factors are provided or not.
Diagram showing different responses of normal and cancer cells to growth factor presence or absence.
Normal cells in a culture dish will not divide without the addition of growth factors.
Cancer cells in a culture dish will divide whether growth factors are provided or not.
Cancer cells also ignore signals that should cause them to stop dividing. For instance, when normal cells grown in a dish are crowded by neighbors on all sides, they will no longer divide. Cancer cells, in contrast, keep dividing and pile on top of each other in lumpy layers.
The environment in a dish is different from the environment in the human body, but scientists think that the loss of contact inhibition in plate-grown cancer cells reflects the loss of a mechanism that normally maintains tissue balance in the body^2
2
squared.
Another hallmark of cancer cells is their "replicative immortality," a fancy term for the fact that they can divide many more times than a normal cell of the body. In general, human cells can go through only about 40-60 rounds of division before they lose the capacity to divide, "grow old," and eventually die^3
3
cubed.
Cancer cells can divide many more times than this, largely because they express an enzyme called telomerase, which reverses the wearing down of chromosome ends that normally happens during each cell division^4
4
start superscript, 4, end superscript.
Cancer cells are also different from normal cells in other ways that aren’t directly cell cycle-related. These differences help them grow, divide, and form tumors. For instance, cancer cells gain the ability to migrate to other parts of the body, a process called metastasis, and to promote growth of new blood vessels, a process called angiogenesis (which gives tumor cells a source of oxygen and nutrients). Cancer cells also fail to undergo programmed cell death, or apoptosis, under conditions when normal cells would (e.g., due to DNA damage). In addition, emerging research shows that cancer cells may undergo metabolic changes that support increased cell growth and division^5
5
start superscript, 5, end superscript.
Diagram showing different responses of normal and cancer cells to conditions that would typically trigger apoptosis.
- A normal cell with unfixable DNA damaged will undergo apoptosis.
- A cancer cell with unfixable DNA damage will not undergo apoptosis and will instead continue dividing.
Explanation:
What type of microscope would you use to view a live sample?
1. Scanning Electron Microscope
2.Transmission Electron Microscope
3.Magnifying glass
4. Light Microscope
Answer:
Compound microscopes
Compound microscopes are light illuminated. The image seen with this type of microscope is two dimensional. This microscope is the most commonly used. You can view individual cells, even living ones.
how you can play your role to overcome the waste issue in your area?
(giving brianliest with extra points)
Answer:
Recycle and throw away approprite trash
Explanation:
Recycle and throw away appropriate trash.
Some relationships between organisms are described below. What type of relationship does each statement describe?
Answer:
Competition, predation, commensalism, mutualism and parasitism.
Explanation:
There are five types of relationships present between organisms such as competition, predation, commensalism, mutualism and parasitism. Competition is a type of interaction between organisms in which both the organisms are harmed. In predation relationship, one organism feed on the other by killing it. commensalism is a relationship in which one is benefited and the other is neither benefited nor harmed. In mutualism relationship, both the organisms or species gets benefit from one another whereas parasitism is a type of relationship in which one organism is benefited and the other is harmed not killed.
Image Courtesy of 3D Science.com
Based on the image above, which of the following digestive system organs performs both mechanical and chemical digestion?
Answer: Option A
Explanation:
Answer:
A.
Explanation:
Digestion begins in the mounth. Mechanical digestion is the actual chewing of the food, and the chemical digestion begins when the saliva secretes digestive enzymes.
true or false
How an animal obtains food is part of its niche
Answer:
False
Explanation:
A niche is making a living as a top carnivore.
4. Describe the factors that make a population move to a diferent location.
Movement caused by.....
Answer:
From a natural disaster like earthquake or tsunami there homes are destroyed and went to other place to live because it's easy to start again and felt that they can't fix there home anymore. Another example would be poverty they went to abroad because the job and life is good there.
correct answer gets brainiest. and i’m telling u. if u guess or leave a link, ur getting reported and that’s not a threat
what are the three age categories labels between childhood and adulthood
Answer: Early adolescence, middle adolescence, and late adolescence.
brainliest or a thank you please :)) <33
how can older rocks be found on top of younger rocks in a cross-section?
Answer:
Thrust faults form where rocks are being compressed, usually by plate tectonic mechanisms. Thrust faults rip up older strata and pile it on top of younger rocks.
Explanation:
source from the internet
Which statement accurately describes the levels of organization?
A. A group of cells that work together to perform a common function is called an organ,
B. A group of tissues that work together to perform a common function is called an organ,
C. A group of tissues that work together to perform a common function is called a cell,
Activity
Dana
Tyne here
Answer:B. A group of tissues that work together to perform a common function is called an organ,
Explanation:
Write your explanation of the role of genetics in Natural and Artificial Selection. Write on how environmental factors affect the survival based on Natural and Artificial Selection.
Which is an example of a scientific theory?
A. On average, larger mammals sleep longer than smaller mammals.
B. If a plant receives pure water, then it will grow more than one that
receives salt water.
C. Organisms evolve over time due to changes in heritable physical
characteristics.
D. If a person takes at least one vitamin per day, then it will reduce a
person's level of tiredness.
HELP PLEASE!
Answer: Organisms evolve over time due to changes in heritable physical characteristics.
Explanation:
There are a few things to look for when distinguishing between a nonscientific theory and a valid scientific theory. One thing to consider is if there are any published literature, experimental studies, and data available to support the theory. Most scientific theories have data and information tied to them. Another factor to examine is who has developed the theory. A scientific theory will always be supported by evidence with large quantities of data and testing. An example of a scientific theory is the theory of evolution, which observes changes in heritable physical traits over time in an organism. A hypothesis might be that all organisms evolve at the same rate.
Organisms evolve over time due to changes in heritable physical characteristics is an example of a scientific theory known as evolution. Thus, option C is correct.
What is evolution?Evolution is the scientific theory that explains that "a change in the characteristics of biological populations over next generations.
According to scientists RNA is the first existing molecule on earth that replicate by itself and the process of evolution lead to advanced forms of life.
These characteristics are easily trasfered from one generation to other generation.
Therefore, Organisms evolve over time due to changes in heritable physical characteristics is an example of a scientific theory known as evolution. Thus, option C is correct.
Learn more about evolution here:
https://brainly.com/question/13492988
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Which of these is an example of pathogen transfer via indirect contact?
a. kissing
b. handshaking
c. sexual intercourse
d. breathing infected air
Answer:
Did you read carefullly?
Explanation:
Wait ima help you im eating rn
what animal eats fiddler crabs?
Answer:
Predators that feed on fiddler crabs include herons, egrets and raccoons. At one to two years, the fiddler crab reaches sexual maturity.
Explanation:
The staff in the neonatal unit at a hospital are not sure which of two babies belong to which set of parents. The blood types of the babies are AB and O. One set of parents has blood types A and B. With this knowledge it would still be necessary to test the second couple.
True
False
Answer:
True
Explanation:
Interactions that destabilize the system to have feedback
Answer:
A negative feedback loops is when glucose levels get too high, the body releases insulin into the bloodstream to get back to normal blood levels.
Briefly describe what uses the oceans can pose to humanity. Write your response in the essay box below.
Answer:
Water, fresher climate, not only scientific factors but also a psychological factor (nice beaches, palms, other wildlife, etc.)
Which characteristic of living organisms is shown?
Answer:
excretion
Explanation:
6. The three main regions of the brain that receive and process information are the cerebrum, the cerebellum, and the ____________________________.
Why does energy transfer not always result in Phase change ?
Answer:
phase change requires more energy to occur
Which of the following represents the correct order of the phases of the
Moon?
A. new moon, full moon, last quarter, first quarter, and then new moon again
B. full moon, new moon, last quarter, first quarter, and then full moon again
C. full moon, last quarter, new moon, first quarter, and then full moon again
D. last quarter, full moon, new moon, first quarter, and then last quarter again
Answer:
c
Explanation:
full and new moons aren't back to baxk
What does a bioprospector do?
Answer:
bioprospecting. The analysis of plants, animals, insects and other organisms in an ecosystem with high biodiversity for therapeutic candidate molecules and substances.
Explanation:
Answer:
It does the analysis of plants, animals, insects and other organisms in an ecosystem with high biodiversity for therapeutic candidate molecules and substances.
Explanation:
I will mark Brainliest for frist answer
Answer:C, to contain the information
Explanation:
which type of specialized cells would be found in an animal’s neuvous system?
The type of specialized cells would be found in an animal’s nervous system are the cells that transmit signals around the body. The correct option is D.
What is the nervous system?The nervous system is the part of an animal's body that controls behavior and sends messages to other parts of the body. It is divided into two components in vertebrates: the central nervous system (CNS) and the peripheral nervous system. The CNS houses the brain and the spinal cord.
Neurons are specialized cells found in animals. These cells are classified as sensory neurons, interneurons, or motor neurons based on their function. They transmit signals from the body to the brain and from the brain to the body parts.
Therefore, the correct option is D. Cells that can transmit signals around the body.
To learn more about the nervous system, refer to the link:
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The question is incomplete. Your most probably complete question is given below:
Cells that transport oxygen are found in the blood.
Cells that secrete hormones to trigger cellular responses.
Cells secrete enzymes to break down food.
Cells that can transmit signals around the body.
pollination of a flower or plant with pollen from a different flower or plant is known as
Answer:
Cross-pollination
Explanation:
cross-pollination is when pollen from one plant gets transported to another plant.
self-pollination is when pollen gets transported from the anther to the stigma of the same flower or a different flower on the same plant.
help................
The top left, would be light energy from the sun, while the top of the circle would be living beings. Think about it just like plants that that gain energy from the sun through photosynthesis. Then the bottom of the circle would be nonliving beings, either decomposed plants or animals that bring nutrients to soil, or dead ones that we eat. This cycles through until the energy is rereleased through heat. Therefore the top right would be heat energy, every living thing on earth creates gradual amounts of heat. Imagine going for a run, you'll probably be hotter afterwards right? I know it's not the most scientific answer but its 100% right.
Hope this helps!
PLZ HELP!
How can you tell a sedimentary rock from another type?
Answer:Sedimentary rocks are made from grains so if it is made up from limstone,coal,shale, and sandstone then it is a Sedimentary rock.
Answer:
Sedimentary rock is often found in layers, another way to tell if a rock sample is sedimentary is to see if it is made from grains. Some sedimentary rocks have limestone, sandstone, coal and shale in them.
Hope this helps
7. How does a beach mouse get its trait? The order of the process is:
A.RNA → Gene A → Protein A → Amino Acid → Fur color
B.Gene A → Amino Acid → Protein A → RNA → Fur color
C.Protein A → Amino Acid → RNA → Gene A →Fur color
D.Gene A → RNA → Amino Acid → Protein A → Fur color
E.RNA → Gene A → Amino Acid → Protein A → Fur color
If the person drank a large volume of water, far more than was needed by the body, predict what would happen to glucose, urea, and calcium ion components in urine?
Answer:
there would be less of these components in urine
Explanation:
