Answer:
over 7 yrs...............
Why are drugs bad for people?
Answer:
They cause reactions in your nervous system that arent meant to happen
There is a direct relationship between the number of pollinating plants and the number of honeybees. Each population is dependent on the other for their survival and ultimately reproductive success.
Answer:
Both depends on one another.
Explanation:
Yes, there is a direct relationship between the number of pollinating plants and the number of honeybees because honeybees are insects that are responsible for pollination in the flowering plants. The population of flowering plants also has a great effect on the survival of honeybees because these flowering plants provides food in the form of nectar on which these honeybees survive and make honey from it. So we can say that both flowering plants and honeybees depends on one another for the successful growth and development.
A limiting factor is a resource or other factor in the environment that can lower the population growth rate.
A. True
B. False
plz no bit.yl stuff, just answers
Sickle cell anemia is a disease that affects the circulatory system.It can be passed from parent to child. Which of the following indicates the significance of this disease?
A.It shows that a disease can cause genetic changes.
B.It is a reflection of how genetic factors affect health.
C.It shows how public health is affected by environmental factors.
D.It indicates how a toxin can play a role in the development of disease.
Which quality of lipids does it demonstrate?
inability to store energy
ability to form chains of nucleotides
inability to break down in water
ability to provide structural support
Answer:
I thinks its d but not sure
Explanation:
Lipids are macromolecules composed of fatty acids. The diagram represents the inability of the lipids to break in the water. Thus, option c is correct.
What are lipids?Lipids are said to be polymers as they are large molecules made of the monomers of the fatty acid chains and glycerol bonded together by chemical bonds. They include oils, fats, steroids, waxes, hormones, phospholipids, etc.
They are energy storage molecules along with carbohydrates and act as messengers in the form of hormones. They store energy in fat cells (adipose) for a longer period of time. They make the component of the cell membrane, blood cells, and cholesterol.
They are soluble in an organic solvent but not in water as it is a non-polar compounds with hydrophobicity and hydrophilicity. They are insoluble and remain intact in the water molecule.
Therefore, option c. the lipids do not break in the water.
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Is there anything in the world that isn't made of cells?
HELP ASAP PLZ!!
Answer:
Instead of cells, a non-living thing is made up of elements or compounds that form from chemical reactions. Examples of non-living things are rocks, water, and air.
Explanation:
hope this helps:)
Can someone please help me I’m stuck on this question!!
Answer:I think that answer is b
Explanation:
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:
Which explanation is best supported by the numbers in the chart?
Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs.
The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
Overhunting of lion and cheetah populations has led to a decline in the food source population.
Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.
Answer:
The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
Explanation:
The decrease in zebra population also decreases the population of the predator lion and cheetah because both predators depends on zebra for their survival. Both predators used zebra as a source of food for their growth and survival so if there is high availability of zebra so the population of Lions and cheetah also increases while on the other hand, if there is decrease in zebra population, the population of lion and cheetah also decreases because of less available food for them.
Answer:
B) The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
Explanation:
2021 edge :)
Analyze the effects of DNA mutations
on the
of an organism.
Answer:
DNA mutations or Chromosomal mutations are also called chromosomal aberrations, chromosomal abnormality, or chromosomal disorders, all indicating a possible alteration in the morphology and structure of the chromosome.
DNA mutations lead to abnormalities in the function of the cell and organism, as chromosomal or DNA mutations can result in abnormal gene numbers or positions.
These are known to cause different genetic diseases that can be hereditary and are transferred from one generation to another.
These mutations, however, do not always affect the functioning of the cell as some mutations might affect regions of chromosomes that do not make up the genetic makeup of the organism.
Even though gene mutations are usually more severe than chromosomal mutations, some chromosomal mutations might result in gene mutations.
A group of students wants to study the structures of animals in the desert. One question they should ask is-
How long do the animals live?
Can you buy the animals in pet stores?
How do the animals satisfy their need for water?
How many offspring do the animals have?
From studies and research, I believe the proper question would be:
"How do the animals satisfy their need for water?" or "How long do the animals live?"
Explanation 1:
When studying the desert, asking "Can you buy the animals in pet stores?" is not going to help you find information about the desert because it is not a question to get information about the desert, only information if you just buy it at your local pet shop.
Explanation 2:
Asking "How many offspring do the animals have?" does help us learn about animals, but we are trying to find information on the structure of the desert in which the animals live in. We are not looking for how many children the animals will have because it doesn't fully relate to the question we would be asking.
Side Note: Offsprings mean children.
Hope this helps!
~Hocus Pocus
Which of the following is an example of a producer-consumer
relationship?
productor?
Worm --> Bird
Leaf --> Tree
Fish --> Bear
Grass --> Deer
Answer:
Grass and Deer
Because Grass is consumer and Deer is producer
A star is bigger than a solar system.
O True
O False
false because there are millions of stars in the solar system so they can't be big if that many are in it :)
Answer:
False
Explanation:
A solar system is composed of a star and planets. The star is what makes a solar system a solar system, but a solar system is a star and other planets.
Can someone please help me on this plz I beg u :(
Answer:
Coleoptera is correct! Hope this helps.
How does nondisjunction affect the production of gametes?
Answer:
Nondisjunction Produces Abnormal Gametes. If nondisjunction occurs during anaphase I of meiosis I, this means that at least one pair of homologous chromosomes did not separate. The end result is two cells that have an extra copy of one chromosome and two cells that are missing that chromosome. Click to see full answer.
Explanation:
Two insect groups vary genetically by two genes. When put together, they were able to reproduce and produce offspring that could also breed. Which best describes this insect population?
The insects experienced geographic isolation.
The insects experienced reproductive isolation.
The insects are different species.
The insects are the same species.
The answer is D. The insects are the same species.
The insects are the same species best describes this insect population.
What is reproductive isolation?The fact that the two insect groups were able to reproduce and produce offspring that could also breed indicates that they are not experiencing reproductive isolation. Reproductive isolation occurs when two populations of organisms can no longer interbreed due to genetic or behavioral differences.
Since the two insect groups can interbreed and produce viable offspring, it suggests that they are not different enough genetically to be considered different species.
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a retionship where both species benefit is called
Answer:
Mutualism is a symbiotic relationship in which both species benefit.
Explanation:
How do the posterior pituitary gland and the anterior pituitary gland differ in structure ?
The anterior pituitary receives signalling molecules from the hypothalamus, and in response, synthesizes and secretes seven hormones. The posterior pituitary does not produce any hormones of its own; instead, it stores and secretes two hormones made in the hypothalamus.
Answer:
they differ like
Explanation:
The anterior pituitary receives signalling molecules from the hypothalamus, and in response, synthesizes and secretes seven hormones. The posterior pituitary does not produce any hormones of its own; instead, it stores and secretes two hormones made in the hypothalamus.
During a hot July day, Brian and his friends play football outside. After a while, they are covered in sweat. Brian comments that sweat is just your body’s way of cooling itself. Which systems are involved in your body attempting to maintain homeostasis during high temperatures?
a. Your nervous system sends signals to your muscular system.
b. Your circulatory system gives blood to your respiratory system.
c. Your muscular system attempts to cool your skin through radiation.
d. Your excretory system attempts to cool your skin through evaporation.
Answer: B is correct I had this question too!
Similarly, the cardiovascular, integumentary (pores and skin and related structures), respiratory, and muscular structures paintings collectively assist the frame preserves a strong inner temperature. If frame temperature rises, blood vessels withinside the pores and skin dilate, permitting extra blood to waft close to the pores and skin's surface.
The temperature in the frame varies; in a frame in homeostasis (regular fitness state), the 'core' temperature is maintained inside quite a number 36-37.5.
What is Homeostasis?Homeostasis via way of means of contracting to show chemical electricity into thermal electricity if the frame is cold, it additionally facilitates to preserve homeostasis via way of means of contracting extra or much less frequently so oxygen can get to all cells from the heart.
Thus it is clear that systems are involved in your body attempting to maintain homeostasis during high temperatures your muscular system attempts to cool your skin through radiation.
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What is meant by trophic levels?
Answer:
The position it holds in the food chain
Explanation:
A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves.
What are some potential solutions to the problems Pavan identifies?
Answer:
below
Explanation:
Waste disposal; We need to recognize the benefits of nature and start preserving nature.
explain how the adaptation to reproduce quickly is beneficial in bacteria's ability to
develop resistance to antibiotics
Answer:
Antibiotics save lives but any time antibiotics are used, they can cause side effects and lead to antibiotic resistance.
Since the 1940s, antibiotics have greatly reduced illness and death from infectious diseases. However, as we use the drugs, germs develop defense strategies against them. This makes the drugs less effective.
forest plant nurseries will likely work with state and federal agencies
Answer:
true
Explanation:
Answer:
If this is a true or false question it would be true.
Explanation:
Forest plant nurcries have an important job of helping and protecting forests and they are used by federal agencies to learn more about how to protest these plants.
Exhaust from motor vehicles is the number one cause of what?
carbon monoxide pollution
acid rain
mercury poisoning
sulfur dioxide pollution
Answer:
A. Carbon monoxide pollution
Answer: Motor vehicle exhaust is the most common factor leading to carbon monoxide poisoning
Explanation: People drive every day to go do daily activities, while driving is an efficient way of traveling long distances quickly, it runs off of fossil fuels which the waste product of is horrible for the environment.
Why does an atom have a neutral charge?
A. It has equal numbers of electrons and neutrons.
B. The number of neutrons equals the number of protons and
electrons in the atom.
C. It has equal numbers of electrons and protons.
D. It has equal numbers of neutrons and protons.
ITS C
If a DNA molecule is made up of 14% Thymine, theoretically, what percentage would be made up of Guanine?
Answer:
I expect to find
Explanation:
A=30% C= 20% T = 36% G=14%
which reproduction uses non reproductive plants of a plant to produce new plants
Answer:
Vegetative propagation
Explanation:
Vegetative propagation does not require seeds or spores. Instead, offspring grow from a part of the parent plant.
why is it important to save energy in our daily lives
Answer:
So you can be more active and do different things that need energy
Explanation:
Having energy is an important part of daily life. Without energy, the human body would not be able to go throughout the day without being tired and without their muscles and bones hurting.
Which waves can make dramatic ground movements
Answer:
surface waves
Explanation:
surface waves
The energy from sunlight is directly used by the plant to
A. absorb carbon dioxide.
B. split water.
C. suck up water through the roots.
The energy from sunlight is directly used by the plant to :
=》split water molecules,
splitting of water molecules during photosynthesis is done by solar energy absorbed through chlorophyll.