Which of the following MOST influenced the growth in the human population over the last century?
(A) Farmers have developed new crops that can grow in various climates and with small nutrient input.
Mechanical and chemical technologies have been developed to greatly increase agricultural production.
(C) The development of chemical fertilizers has enabled farmers to grow more intensive staple crops.
(D) Access to new freshwater resources has greatly expanded the use and efficiency of irrigation systems.
Answers
Answer:
A)
the agricultural development allowed people to have plenty of food which allowed them to live a healthy and plentiful life soon increasing human reproduction and soon the population.
Related Questions
Why do regions/places have different types of climates? Try to give an example in your answer
Answers
Answer:
The climate of a region depends on many factors including the amount of sunlight it receives, its height above sea level, the shape of the land, and how close it is to oceans. Since the equator receives more sunlight than the poles, climate varies depending on its distance from the equator.
Answer,because of the bench marks
Explanation:
regions have different type of climates because of various reasons it could be determined by the fove benchmarks equator ,arctic circle,antartic circle,tropic of cancer and capricorn.
How are species impacted when humans destroy their habitat? Give at least one example of a species that is being affected by humans
Answers
Answer: Polar Bears
Explanation: Global warming is making the earth warmer and humans are behind it. People drive cars which releases C02 into the air. This makes the earth warmer. Polar Bears are affected by it because their habitat is melting away.
Answer:
There are many species on earth but they go extinct quick due to people destroying their habitats. Animals like squirrels, birds, rodents, and other forest dwelling creatures are being affected through clearing of land for agriculture. Forests are ripped apart and removed so people can build homes and city’s all over the world.
Which statement about models in science is true?
A:Models change to accommodate new discoveries.
B:Models are only used by engineers.
C:Models never change.
D:Models are only used by scientists.
Answers
Models change to accommodate new discoveries. This statement is true. Therefore option A is correct.
Models change to accommodate new discoveries is true because models in science are representations of natural phenomena or systems used to understand and predict real-world behavior.
As scientific knowledge advances and new discoveries are made, models are updated and refined to incorporate the latest information.
Scientists use models to test hypotheses, make predictions, and gain insights into complex processes. Similarly, engineers also use models to design and optimize various systems.
Therefore option A is correct.
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how are osmosis and facilitated diffusion alike?
Answers
They both use passive transport. they don't need energy to move molecules through the plasma membrane.
Komodo dragons (a lizard species) and red-tailed boas (a snake species) are both reptiles. They share a common ancestor population that lived about 250 million years ago, but they have been separated in different environments, with different food sources, for millions of years. Komodo dragons and red-tailed boas have some shared structures. They also have some differences in their structures.
1.Why do Komodo dragons and red-tailed boas have some shared structures and some different structures?
Answers
Komodo dragons and red-tailed boas have some shared structures because they both evolved from a common ancestor population that lived about 250 million years ago.
What is the difference has come over the time in these species?Over time, as these two species separated into different environments with different food sources, they underwent separate evolutionary trajectories that led to differences in their structures. However, many of the underlying genetic and developmental mechanisms that produced their ancestral structures are still present in both species.
For example, both Komodo dragons and red-tailed boas have scales, which are a common feature of reptiles. Scales serve to protect the skin from abrasion and injury, as well as to reduce water loss. They also both have a vertebral column, which provides support for the body and protects the spinal cord.
At the same time, Komodo dragons and red-tailed boas have differences in their structures because they evolved in different environments and have different feeding strategies. Komodo dragons are large, carnivorous lizards that use their sharp teeth and powerful jaws to hunt and kill prey, while red-tailed boas are constrictor snakes that use their muscular bodies to suffocate and swallow their prey whole.
As a result, the structures of their jaws, teeth, and digestive systems are adapted to their respective diets and hunting strategies, and differ in significant ways.
Overall, the shared and different structures between Komodo dragons and red-tailed boas reflect both their common evolutionary heritage and their divergent evolutionary trajectories.
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In three paragraphs, explain the difference between gills and lungs. Give examples of animals with only gills, those with only lungs, and those with both gills and lungs. What are the advantages of having gills, lungs, and both?
HELP ASAP!!!!
Answers
Lungfish have a unique respiratory system, having both gills and a lung. It is the only type of fish to have both organs, not only does it help them to survive, but may also be key to the evolutionary origins of the lung. Granddad is the oldest fish we know of anywhere in the world, and there are only six known species around the world.
The advantages of having both lungs and gills gives a better chance of survival above and in water.
Select the correct answer from each drop-down menu.
The legs of a human and the limbs of a cat are similar in structure. These structures are called
structures. This similarity indicates that_________.
A.Humans evolved from cats.
B.Cats evolved from the ancestors of humans.
C.Cats and human share a common ancestor.
Answers
Answer:
for those that still need help its The legs of a human and the limbs of a cat are similar in structure. These structures are called homologous structures. This similarity indicates that cats and humans share a common ancestor.
Explanation:
have a good day love :)
Infectious Disease Investigation
The students are to investigate an infectious disease.
They will choose a specific infectious disease, such as the flu, common cold, or
COVID-19, and research its causes, symptoms, and preventive measures.
Students are to create informative posters or presentations about the disease,
including its transmission methods and ways to protect oneself from infection.
They will explain the importance of personal hygiene and vaccination in preventing
the spread of infectious diseases.
Following the summer vacation, the students will be given an opportunity to present
their findings to the class or organize an "Infectious Disease Awareness Campaign"
where they can share their posters or presentations with their peers.
Answers
Answer:
The common cold is an illness affecting your nose and throat. Most often, it's harmless, but it might not feel that way. Germs called viruses cause a common cold.
Often, adults may have two or three colds each year. Infants and young children may have colds more often
The diagram shows one specific segment of DNA
Unwound,
DNA
TIU
What is the DNA molecule in the diagram doing?
A. It is exposing the amino acids for the protein
OB. It is unwinding to make a nen chromosome.
C. It is dividing in half to copy its nucleic acids.
D. It is using a gene to make a protein
Answers
Answer:
C
Explanation:
Answer: C
Explanation:
DNA stands for deoxyribonucleic acidTrusted Source. It contains units of biological building blocks called nucleotides.
DNA is a vitally important molecule for not only humans but also most other organisms. DNA contains our hereditary material and our genes, the things that make us unique.
I may need some help on a lot of these questions
Answers
Answer:
number three is ghe real answer
Some students observing a classroom device being used noticed the below energy transformations.
energy to mechanical to sound
Which device were the students most likely observing?
A triple beam balance measuring an object’s mass
A pencil sharpener plugged into a wall outlet
A projector displaying a diagram on the screen
A working flashlight used to light up a dark corner
Answers
what type of bird egg is this btw i live in sc i found it in my backyard my dog was about to step on it
pls say right answer
Answers
Answer:
Can you paste a picture here?
Explain Mendel’s laws in genetic terms, that is, in terms of chromosomes, genes, and alleles.
Answers
Mendel's First Lawstates that for the pair of alleles an individual has of some gene (or at some genetic locus), one is a copy of a randomly chosen one in the father of the individual, and the other if a copy of a randomly chosen one in the mother, and that a randomly
A parent may have two distinct alleles for a certain gene, each on one copy of a given chromosome. Mendel's second law, the law of segregation, states that these two alleles will be separated from each other during meiosis.
Hope this helps!
kendra wonders what would happen if the oceans did not exsit on Earth . based on her understanding of the oceans and the water cycle she predicts that earth would become warmer , with less rain , more clouds , and that living things would not survive. wich part of her prediction is incorret
Answers
See, oceans takes up most of the earths surface which most life is in the ocean.
The sun also evaporates the oceans water which leads to rain in the tropical areas. We would have only lakes left if oceans just disappeared. Soon we will run out of water from that unless we reuse it from certain situations.
We sometimes use ocean water for drinking after it has been boiled.
Which circuit illustration represents circuit B?
Answers
Answer:
E
Explanation:
your welcome
E is the circuit that represents circuit B
1. What kinds of pollution do you know? Which is the worst? Discuss in group.
2. What are fossil fuels? Give examples. Where are they used? Can they be replaced?
3. Some factories dump waste water in rivers and ocean. How can we prevent this?
4. People throw away tons of garbage everyday. How can we reduce the amount of garbage?
5. Do you drink bottled water? Why or why not? What is its effect on the environment?
pls 3-5 sentence and then explain briefly the answer. ty
Answers
Answer:
1. There's air pollution, water pollution, noise pollution, and light pollution. The worst pollution is air pollution because it can cause severe health problems like respiratory diseases or even cancer.
2. Fossil fuels are resources that are formed from the remains of dead plants and animals. An example would be coal, oil, and natural gas. These fuels are used to generate electricity, power vehicles, heat homes and buildings. Yes, there many other energy sources that can replace fossil fuels.
3. One way to prevent factories from dumping waste water in rivers and oceans is to implement stricter regulations and penalties for those who violate them.
4. One of the best ways to reduce the amount of garbage is to reduce, reuse, and recycle.
5. Yes, I drink bottled water because it's more water to drink from a bottle and its effect on the environment is recycling and being reused.
1. Pollution can be of many types such as air pollution, water pollution, noise pollution, and land pollution. In my opinion, air pollution is the worst because it affects people's health and can cause breathing problems, heart diseases, and even cancer. Discussing this issue in a group can help us understand different perspectives and find solutions to reduce pollution.
2. Fossil fuels are non-renewable sources of energy that are formed from the remains of dead plants and animals. Examples of fossil fuels include coal, oil, and natural gas. They are used to generate electricity, fuel vehicles, and heat homes. However, they are a major contributor to air pollution and climate change. Fossil fuels can be replaced by renewable sources of energy such as solar, wind, and hydro power.
3. Factories dumping waste water in rivers and oceans can have a negative impact on aquatic life and the environment. To prevent this, factories can treat their waste water before discharging it into the environment. Governments can also enforce strict regulations and penalties for factories that violate environmental laws.
4. To reduce the amount of garbage, we can follow the three R's - reduce, reuse, and recycle. We can reduce the amount of waste we generate by using reusable bags, bottles, and containers. We can also compost organic waste such as food scraps and yard waste. Recycling can also help reduce the amount of garbage by turning waste into new products.
5. I try to avoid drinking bottled water because it generates a lot of plastic waste that can take hundreds of years to decompose. Plastic waste can also harm wildlife and pollute the oceans. Instead, I use a refillable water bottle and fill it with tap water. Tap water is safe to drink in most developed countries and can be a more sustainable choice.
help asap >Science<
This is how fluorine appears in the periodic table.
Which is one piece of information that "9” gives about an atom of fluorine?
the atomic mass
the atomic number
the mass of neutrons
the number of neutrons
Answers
Answer:
Atomic number
Explanation:
The number nine here indicates the number of protons.
The picture I have attached shows the meaning behind the numbers in the periodic table!
Answer: The atomic number (Number of protons)
Explanation:
Fluorine - Periodic Table. Fluorine is a 9. chemical element in the periodic table of elements. It has 9 protons and 9 electrons in the atomic structure. The chemical symbol for Fluorine is F.
1739 m = __________cm *
Answers
Answer:
1739m = 173900cm
Explanation:
multiply the length value by 100 [ in order to find cm from m ]
1739*100
===173900cm
Why do fatty foods take longer to digest than sweets?
Answers
Answer:
Fat digests more slowly than other foods and is energy-dense, packing more calories per ounce than other foods
Which of these organisms is not a chordate?
earthworm
snake
sea squirt
human
Answers
hope this helped.
Who is Vandana Shiva
Answers
Vandana Shiva is an Indian scholar, environmental activist, and author known for her work in the field of environmental sustainability, biodiversity conservation, and social justice. She was born on November 5, 1952, in Dehradun, India. Shiva has a background in physics and earned her Ph.D. in philosophy from the University of Western Ontario, Canada.
Shiva is a prominent advocate for sustainable agriculture, seed sovereignty, and the rights of small-scale farmers. She is known for her opposition to genetically modified organisms (GMOs) and the negative impacts of industrial agriculture on the environment and local communities. Shiva has been involved in grassroots movements and organizations, including Navdanya, which promotes seed conservation and organic farming practices.
Vandana Shiva has authored numerous books, including "Staying Alive: Women, Ecology, and Development," "Earth Democracy: Justice, Sustainability, and Peace," and "Making Peace with the Earth." She has received several awards for her work, including the Right Livelihood Award (Alternative Nobel Prize) in 1993. Shiva continues to be actively involved in raising awareness about sustainable agriculture, biodiversity, and social justice issues on a global scale.
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If you have car sickness, but only when you look at a book or screen while its moving, is there an exact terminology for it?
and sorry if i chose the wrong subject for this, im new to asking questions.
Answers
Answer:
The exact terminology would be motion sickness, not car sickness.
Explanation:
Reading a book or using your phone while in or on any moving object can cause motion sickness.
With motion sickness your body is moving in space, such as in a moving car or on a boat rocking at sea, but your eyes aren’t getting the same information. Kind of like when you are reading while in a car: Your eyes are focused on the words, thinking you’re stationary, but the rest of your body is sensing the movement of the car.
Motion sickness is basically a sensory conflict.
Now there is something called cybersickness, which is almost the same as motion sickness but it pertains more to using/ watching moving pictures on a screen while your body is stationary.
It has opposite sensory effects than motion sickness, where your eyes think you are moving but your body is not.
Look at the diagram of the rock cycle below.
Which part of the cycle is missing?
A.
sedimentation
B.
melting
C.
crystallization
D.
mineral integration
Answers
it’s melting
From the diagram of the rock cycle the missing part is ( B ) ; Melting
Magma is a hot liquid/semi-liquid rock that is usually formed under the earth due to high pressure and temperature present in the inner core of the earth. magma is obtained by the melting down of existing rocks ( Igneous, sedimentary and metamorphic rocks ) under high pressure and temperature in the earths core.
Magma is released to the earth surfaces during volcanoes therefore the missing term in the rock cycle is melting
Hence we can conclude that from the diagram of the rock cycle the missing part is Melting.
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Two species of birds try to eat from the same ear of corn in a field, this is an example of
a. predation
b. commensalism
c.competition
d. sybiosis
Answers
please answer c: image attached
Answers
A scientist wants to know how the distance from a nearby lake affects the amount of nitrogen found in the soil. She collects soil samples at various distances from the lake and measures the amount of nitrogen in the sample What is the manipulated variable in this experiment?
A. The distance from the lake
B. The size of the lake
C. The total number of samples
D. The amount of nitrogen in each sample
Answers
Answer: I would think A (The distance from the lake) but if I'm wrong please let me know and ill fix it ASAP!
Explanation: A manipulated variable is an independent variable subject to the changes of an experiment to analyze its effect on a dependent variable.
How does the cycling of matter and energy in the greenhouse exemplify the Law of Conservation?
Answers
Explanation:
Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
For example, the carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to a gas but its mass does not change. Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.
What is poison?
pls help
Answers
Answer:
Explanation:
In biology, poisons are substances that can cause death, injury or harm to organs, tissues, cells, and DNA usually by chemical reactions or other activity on the molecular scales, when an organism is exposed to a sufficient quantity.
Which two body systems work together to deliver oxygen to cells?
A. the digestive and respiratory systems
B. the respiratory and circulatory systems
C. the digestive and circulatory systems
D. the circulatory and excretory systems
Answers
Answer:
its (b)
Explanation:
Answer: B
Explanation: the respiratory system includes your lungs, etc., which help you breathe, and the circulatory system is what circulates oxygen through your body.
Living factors that affect the growth of organisms are called
A. abiotic factors
B. biotic factors
Answers
Answer:
B. biotic
Explanation:
Answer: B
Explanation: In biology and ecology, abiotic components or abiotic factors are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. Abiotic factors and the phenomena associated with them underpin biology as a whole.