The mechanical advantage of a lever is 4 What does it mean?
Answer:
Mechanical advantage MA is the ratio of output (generated by the machine)force to intput (applied to the machine) force. So MA=4 means that for example if you apply 100N then your machine will multiply that force and generate 400N.
How do cells affect the size of an organism?
As animals grow in size, they produce more cells.
As cells expand or shrink, the size of an organism can change.
More cells can produce more chemical energy, allowing animals to get larger.
Larger cells produce larger-sized organisms.
Which term best describes this step of the investigate process
Answer:
experiment
Explanation:
Betty notices an acorn on the ground.She thinks it's a seed so she put it into a pot with soil and water.Eventually,she sees the plant growing upwards.she knows plants have cells and can do photosynthesis.Eventually, the tree grows and produces more acorns.
What characteristics of life did Betty not directly observe over time?
A.The tree has leaves that eventually produce the acorns.
B.The trees use carbon dioxide during the photosynthesis to produce food
C.the tree maintains homeostasis inside its cells.
D.The tree produces more offsprings over time
Answer:
A.the tree has leaves that eventually produce the acorns
Someone plz help me :(
Answer:
A
Explanation:
Answer: I believe your answer should be A
Explanation: Hope this helps!
5 things that cellular respiration and photosynthesis have in common
How are globes used?
Answer:
Globes are used to look at places, without a device. You can think of a globe as a map of the world wrapped up into a ball. If you wanted to look at the United States, you could twist the globe, and see it, and surrounding places like Canada or South America.
In a different case, they are used for school geography. The students are asked to find a place and point to it on the globe.
the statment "the worm is 2 centime=eters long" is an?
Answer:
Adjective
Explanation:
The worm is being described to be 2 centimeters long.
PLS HELP!!!
Cells are capable of reproducing themselves by cell division. For single celled organisms, cell division is essentially reproduction. For multicellular organisms, division is necessary for growth and renewal. Even though cell division is natural and necessary, what happens when the rate of cell division becomes too rapid and out of control? How can we get rid of such rapidly dividing cells in the human body?
Answer:
Here are 5 important things you should know about cancer cells:
1. Everyone has cancer cells in their body. These cells are not detected in routine tests until they have multiplied and grown to billions of cells.
2. Cancer cells are present in the body about 6-10 times in a person's lifetime.
3. When the immune system is healthy, cancer cells will be destroyed, preventing tumor growth and formation.
4. When a person has cancer, it means that he or she may be suffering from severe nutritional deficiencies or due to toxic environmental factors, unhealthy lifestyles and diets.
5. An effective way to fight cancer is to starve cancer cells by not providing them with the food they need to proliferate and grow.
"3 golden rules" help kill cancer cells:
1. Diet to prevent cancer
It can be said with certainty that there is no better way to keep your immune system healthy than with a reasonable and scientific diet. So ask yourself the question "Do you really have a reasonable diet to prevent cancer?". And here are the essential suggestions.
- Increase your diet with fresh vegetables, fruits, whole grains and foods high in fiber.
Eat more antioxidant foods: The fruits below are rich in antioxidants.
In addition, all vegetables and fruits contain a lot of vitamin A (carrot, papaya, tomato, sweet potato, pumpkin), vitamin C (orange, cherry, kiwi, strawberry), vitamin E (avocado, papaya). , cashews, peanuts, sunflower seeds, almonds...) are also foods with strong antioxidant capacity to help prevent cancer.
- Increase vitamin D supplementation.
Vitamin D is a special vitamin that is more important than all other vitamins because of its "universal" effect on the body's immune system. Its biological effects are related to the expression of more than 3000 genes in the body.
In addition to the extremely important role for the musculoskeletal system, the role of vitamin D in the prevention of many cancers and infectious diseases has been scientifically proven.
More than 90% of vitamin D in the body is synthesized in the skin under sunlight. Very little is absorbed from the diet, so the daily diet cannot guarantee the full amount of vitamin D needed by the body.
A recent study by a joint research team between the 108 Central Military Hospital and the University of Tuebingen (Germany) published in the journal BMC Infectious diseases showed that about 90% of healthy people are deficient in this vitamin. plasma vitamin D concentration <30 ng/ml).
Research also shows that there is a strong association between vitamin D deficiency and liver cancer in patients infected with hepatitis B. So the simplest way to ensure that you do not have a deficiency is to take vitamin D supplements. daily dose of 10-20 (µg/day) for all ages.
- Do not eat a lot of sugar and sweets because this is a food source that helps tumor growth. Sugar, not protein, is what tumors need to grow, so people with cancer still need the protein found in meat to boost their health against cancer. However, it should be noted that you should not eat a lot of red meat but should eat chicken and fish instead of beef and pork.
2. Increase physical activity
This is the most important principle of strengthening the immune system that anyone can do. The largest study conducted by the National Cancer Institute (USA) on more than 1.4 million people found that regular physical activity reduces the risk of 13 common types of cancer in humans.
The link between physical activity and reduced risk of many types of cancer can be explained by several key mechanisms:
- Strengthen the immune system, prevent the growth and spread of infectious agents.
- Physical activities help increase metabolism, improve circulation and help transport oxygen to all organs. Cancer cells must not grow in an oxygen-rich environment because oxygen can kill cancer cells.
Lowering levels of hormones such as insulin, estrogen and growth factors are thought to be closely related to cancer formation and development.
- Control weight, prevent obesity: Obesity is a leading risk factor for many types of cancer, metabolic disorders, cardiovascular diseases... It is estimated that more than 500,000 cancers are diagnosed each year. obesity-related diagnoses.
Increased blood flow to organs such as the liver, kidneys and intestines enhances the efficient elimination of waste products and toxins that can be potential causes of cancer from the body.
4. Estimate the size of the outlined (yellow) onion cell under high power (40x). Use the dFOV values calculated from question no. 3. 10 points
The following formula is useful to determine the size of the cell ⇒ Size of the object = FOV / Fit number = dFOV / Fit number. If you have this data, you can estimate the size of the onion cell. According to the values we used, the estimated size of this onion cell is 112 μm.
-----------------------------------------------
Cells are too small to measure their sizes, so to know their actual size, we can make mathematical estimations to know their sizes, or we can use software programs. In this case, we are estimating their size using the following formula,
Size of the object = FOV / Fit number = dFOV / Fit number
Size of the object = size of the cellFOV = eyepiece (mm)/objective magnification Fit number = The number of times the object -cell- fits in the field of viewTo answer this question, we will replace the terms in the given formula.
→ First, we will get the FOV value. From references, we can assume that
under 4X ⇒ FOV = 4.5 mmunder 10X ⇒ FOV = 1.8 mmunder 40X ⇒ FOV = 0.45 mmYou can also calculate the FOV by using a millimeter paper or rule.
Note: We will use these values to replace terms in the formula, but you can use the dFOV value calculated in question no. 3.
→ Second, we will count the number of cells that fit the field. We can see about four cells across the field of view.
→ Finally, we will replace the terms in the formula.
Size of the object = FOV / Fit number
Size of the object = 0.45 mm / 4
Size of the object = 0.112 mm
Since we generally use μm when referring to cell sizes, we need to multiply 0.112 x 1000 to get the size of the cell expressed in μm.
Size of the cell (μm) = 0.112 mm x 1000 = 112 μm
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differentiate between Angiosperms and gymnosperm
Answer:
Angiosperms are vascular plants bearing the seeds in fruits or mature ovaries whilst gymnosperms are other types of the plant which bears the seeds directly on the sporophylls but without any cover.
Explanation:
Examples of gymnosperms include cypress,pine, redwood, spruce and ginkgo.
Examples of angiosperms include apple, banana,peach, cherry and orange.
Also, angiosperms are seeds producing flowering plants whose seeds are enclosed within an ovary.
Gymnosperms are also seeds producing non flowering plants whose seeds are unenclosed.
Hope it helps.
Please mark as brainliest .
In which phase of mitosis is division of the nucleus completed
A. Metaphase
B. Telophase
C. Prophase
D. Anaphase
Answer:
Telophase
Happy to help :)
Cause-affect about timer companies and clear cutting?
Pls help
Answer: it can destroy an area's ecological integrtiy in a number of ways
what defines a living system
Which factor can potentially increase a teenager’s alcohol use?
Answer:
A teenager's decision to drink alcohol can be influenced by: early introduction to alcohol. exposure to adult binge drinking or alcohol dependence. access to alcohol from parents and others.
Land reform and land colonization can have negative effects on the environment and have controversial social ramifications.
Why are these strategies used, even when they have negative effects?
A. They are the cheapest way to increase productivity.
B. Their purpose is to increase the global food supply and reduce malnourishment.
C. If these strategies are not used, pest management will become a severe issue that will destroy many crops.
OD.Chey are needed to implement genetic modification of crops.
Answer:B. Their purpose is to increase the global food supply and reduce malnourishment.
Explanation:
The purpose of land reform and land colonization is to increase the global food supply and reduce malnourishment. So, the correct option is B.
What are land reforms?Land reforms mean the changes made or the changes that are needed to be made in order to ensure that agricultural land is fairly distributed. This is a change in the methods or rules of land ownership, management of owned land and how those methods further impact the public and economy in general.
This simply means the redistribution of agricultural land so that only a certain section of society cannot enjoy the benefits of land ownership.
This process has negatively impacted the environment as the unskilled settlers have been put in charge of managing agricultural land. They are unaware of the environmental impact that various activities can cause. For example burning of firewood, poor animal husbandry practices, land degradation etc.
Therefore, these reforms are used even when they have negative effects on the environment with the intent to increase the global food supply and reduce malnourishment.
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Help me please!!! What does this picture mean
Answer:
i think a cell is zoomed in
Explanation:
HELP PLEASE!!!!!
Compare a virus to a unicellular organism. (1 point)
O Viruses need energy, unicellular organisms do not need energy.
O Unicellular organisms have a cell membrane made from a lipid bilayer, viruses have a protein coat
O Viruses reproduce through asexual reproduction; unicellular organisms need a host cell,
O Neither unicellular organisms nor viruses respond to stimuli.
Answer:
differences : Viruses need energy while unicellular organisms donot need energy
Unicellular organism has cell membrane but virus has protein coat.
Unicellular organisms have a cell membrane that is made from a lipid bilayer whereas viruses have a protein coat which is called capsid. Unicellular organisms reproduce through asexual reproduction whereas virus need a host cell for their survival because virus use the cell engine to extract food for their survival so it is conclude that unicellular organisms have cell membrane but virus has protein coat.
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20 points + brainliest to first correct answer! :))
Which outcome would most likely suggest that data collected is unreliable?
Other scientists conduct the same study but find different data.
The data is put on a scatterplot but does not show any trend.
Each data point is considered by many scientists to be accurate.
Many tools were used in the same laboratory to measure the data.
Each data point is considered by many scientists to be accurate. This is answer.
PLEASE MARK ME BRAINLIESTI believe your answer is.. A.) Other scientists conduct the same study but find different data.
I hope this is correct and helps!
Belle ran a total of 510 meters directly toward school at a constant velocity. She ran one-third
of that distance in 85 seconds. What was her velocity?
HELP ASAP PLZZZ BEING TIMED
Answer:
Explanation:
her velocity was 90kph
Which of these correctly demonstrates the biomolecule with its function?
A)
steroids; separate the cytoplasm from the environment
B)
waxes, prevents water loss and repels water
c)
triglycerides; make up sex hormones
D)
phospholipids, store energy
Answer:
B) Waxes, prevents water loss and repels water
Explanation:
Waxes, steroids, phospholipids, and triglycerides are types of lipids. All of them are made of Hydrocarbon chains that are hydrophobic.
Triglycerides (fats) - Storage molecules for the body's energy
Steroids - Sex hormones and cholesterol
Phospholipids - Cell membrane (Separates cytoplasm from the environment)
Therefore, Answer choice B) Waxes, prevents water loss, and repels water, is the only answer that correctly matches with the provided answers.
HELPP!! (40 pts) Explain how the earth's core has impacted human life. Use evidence from the
text to support your answer.
Answer:
The earth’s core affects the shape of the ground we
walk on.
Explanation: The earth’s core is responsible for
not only the Rocky Mountains, but the formation of cities and societies that have lived there for
generations, such as Rocky Mountain National Park. It’s responsible for mountains that serve as barriers,
bringing to life divisions in culture unique to each side, while also posing a challenge to be crossed and
burrowed into, spurring on scientific innovation in the process.
The Earth's core has impacted human life in a variety of ways. As it is responsible for the generation of the earth's magnetic field and contains a history of the planet.
What do you mean by the Earth's core?The Earth's core may be defined as the innermost layer of the Earth which is very hot and dense.
The Earth's core is responsible for any geographical locations like mountains, deserts, biodiversity hotspots, rivers, etc. It gives a structural appearance to the Earth. Human life is widely impacted and depends on all of these locations for their needs. All these geographical locations determine the climate of that particular area which is responsible for those people who are living at that location. Human life takes all its requirements from this core surface only.
Therefore, the Earth's core has impacted human life in a variety of ways. As it is responsible for the generation of the earth's magnetic field and contains a history of the planet.
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Why do you classify pteridophytes under Trachaeophyta?
Answer:Pteridophytes are called tracheophytes because they have vascular tissues
The variety of organisms within an ecosystem is characteristic of which type of diversity?
Genetic diversity
Ecosystem diversity
Species diversity
Regional diversity
Answer:
Genetic diversity
Explanation:
The answer is the first one hope this helps
about paramosium? explain it
Answer:
Paramecium is a genus of eukaryotic, unicellular ciliates, commonly studied as a representative of the ciliate group. Paramecia are widespread in freshwater, brackish, and marine environments and are often very abundant in stagnant basins and ponds
Paramecium is a unicellular organism with a shape resembling the sole of a shoe. It ranges from 50 to 300um in size which varies from species to species. It is mostly found in a freshwater environment.
It is a single-celled eukaryote belonging to kingdom Protista and is a well-known genus of ciliate protozoa.
As well, it belongs to the phylum Ciliophora. Its whole body is covered with small hair-like filaments called the cilia which helps in locomotion. There is also a deep oral groove containing not so clear oral cilia. The main function of this cilia is to help both in locomotion as well as dragging the food to its oral cavity.
Are male butterflies and moths the same species?
Answer:
Explanation: No they are not.
Which statement correctly describes the relationship between thermal energy and particle movement?
Answer:
The more heat energy an object has, the more particle movement that occurs.
Explanation:
The hotter an object is, the faster the particles move, the colder a object is, the slower.
How does ATP supply energy for cellular activities?
ATP is able to power cellular processes by transferring a phosphate group to another molecule. This process is called phosphorylation
Which came first on planet earth, plants or animals
Answer:
We do not know entirely for sure
Explanation:
The vast majority of evidence points towards complex multicellular plants and animals evolving around the same time 500 million years ago during the Cambrian period. However, simple single-celled prokaryotic bacteria has been around for nearly a billion years. Personally I think it is more likely for plants to have come first as they are simpler and there seems to be a bit for evidence for them being first, like the discovery of multicellular algae that could be up to 1 billion years old (algae is generally considered to be bacteria)
It may be analyzed that land plants first appeared about 500 million years ago. It was the time of the Cambrian period. At this time, the development of multicellular animals does not begin at a systematic level.
When did the first prokaryotic cell was formed?The first prokaryotic cell was formed about 3.5 billion years ago. It was the time when no oxygen was present (anaerobic), the atmosphere was reduced, and the mode of nutrition was hetero chemotrophic.
The first eukaryotic cell was formed about 1.5 billion years ago which leads to the foundation of animal origination. It stimulates numerous changes with respect to the prokaryotic cell. But prior to that some land plants and fungi are already present which deliver the source of food to the developing living entities.
Therefore, according to researchers and scientists, it may be analyzed that the land plants exist before the animals through the help of the earliest fossils.
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What ecological levels does not describe interacting biotic and abiotic factors in an area
Answer:
The broadest, most inclusive level of organization is the biosphere. This includes both biotic and abiotic components of the earth and the part of the atmosphere that supports life.
The Habitat is an ecological level that does not describe interacting biotic and abiotic factors in an area.
What is Habitat?Habitat may be defined as a type of natural environment for which a particular species is best adapted due to natural selection. In other words, it may also be characterized as the area where the basic demands of an organism are fulfilled like food, space, and mating partner.
Habitat is something that only signifies the effect of abiotic factors which are favorable for the survival of any individual of any species under controlled variations.
In this question, the rest of the options include the biome, community, and ecosystem. All such ecological levels significantly illustrate the interaction between biotic and abiotic factors of a given area.
Therefore, the Habitat is an ecological level that does not describe interacting biotic and abiotic factors in an area.
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Your question seems incomplete. The most probable complete question is as follows:
Which of the following ecological levels does not describe interacting biotic and abiotic factors in an area?
BiomeCommunityEcosystemHabitat