11% of people worldwide or 790 million people. Hope this helps!
select all that apply
select characteristics which taxonomists to might choose in constructing a plant classification.
A. leaf shape
B. Type of fruit
C. soil preference
D. cones or flowers
E. flower color
i think leaf shape and cones and flowers hope this helps.
What is desertification? How are nomads and drought related to this process
Answer:
The process of desertification refers to the degradation of land. In simple words, it means changing of a fertile land into an infertile one. It has become one of the major issue in today's world. It is mainly caused due to the lack of rainfall, climate change, deforestation, overgrazing. The consequences of desertification is the occurrence of drought.
Drought is one of the common type of disaster that can have serious impact on the lives of planets. Due to this, a large number of people have to shift their places in order to search for food and to live. These people who migrate from one place to another, having no fixed location are considered as the nomads.
So, in one way, it can be concluded that droughts are responsible for the loss of habitat and people have to migrate from one place to another like the nomadic people in order to survive.
which of the following organism convert energy from the sun into chemical energy ?
Which human activity has the most negative effect on the stability of an ocean environment
Dumping waste from ships
Answer: Carbon emission
Explanation:
The human activity such as burning of fossil fuel and releasing of harmful gases in the atmosphere also affect the oceans.
The green house gas like carbon dioxide is harmful for the animals living inside water. This is so because the carbon dioxide in water becomes carbonic acid in low pH.
This does not allows the formation of calcium carbonate in the water which is the structural component of many aquatic animals.This hinders the formation of shells in molluscan.
After researching the rock they found, Mary and Jim believe it contains large pieces of the mineral limonite. They observed that their rock was yellow in color. And, according to the data they gathered, limonite is also yellow. They plan to conduct an investigation using the scientific method.
Part A
What is Mary and Jim’s hypothesis?
The hypothesis can be defined as an educated guess, which is made by the scientists doing a scientific research.
In this case, the scientist want to test the presence of the limonite in the yellow rocks, So, proposed hypothesis should include the color of rock they want to observe and the posssible outcome, which need to be tested.
So, a proposed hypothesis can be:
The rocks, which have yellow color are made up of mineral limonite.Answer:
They hypothesized that the rock includes large pieces of the mineral limonite.
Explanation:
Which region would likely have the greatest amount of biodiversity
Most of the terrestrial diversity is found in tropical forests and in general, land has more species than the ocean; some 8.7 million species may exists on Earth, of which some 2.1 million live in the ocean.
Tropical rain forests on land and coral reefs in marine systems are among the most biologically diverse ecosystems on Earth and have become the focus of popular attention.
Amazon represents the quintessence of biodiversity, the richest ecosystem on earth.
The right answer is The Amazon region (due to its forest)
The Amazon rainforest is an equatorial forest located in the Amazon basin in South America. The Amazon basin covers 7.3 million km² and the forest itself covers about 6 million km², located in nine countries.
The Amazon rainforest is a tropical rainforest with the world's largest biodiversity (it has more species than the rainforests of Africa or Asia).
Which statements accurately describe mass? Check all that apply. Mass is a chemical property of an object. Mass is measured using a balance. The mass of an object remains constant. Mass is the same as weight. Kilograms are units of mass.
Kilograms are units of mass
The mass of an object remains constant
Mass is measured using balance
These are the correct answers, I hope it helps
The statements that accurately describe mass are;
Kilograms are units of massThe mass of an object remains constantMass is measured using balanceWhat is mass?Mass serves as the quantity of matter in a physical body, mass can be measured through the body's inertia,
Therefore The mass of an object remains constant and Mass is measured using balance.
Learn more about mass at;
https://brainly.com/question/26150306
#SPJ2
DNA replication...
a. involves Polymerase
b. occurs at one site
c. requires a DNA molecule to start the process
d. needs several days' time to occur
Option A is correct.
a. involves Polymerase
Explanation:DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule.
DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, the building blocks of DNA. These enzymes are essential for DNA replication.
These are organisms that are brought into a new environment, sometimes accidentally, sometimes on purpose; and have no natural enemies or controls.
The correct answer is - invasive species/organisms.
The invasive species, very often are very damaging to the new environment. The process of their introduction in a new environment can be:
- Natural, like with the Smilodon getting to South America once a land bridge opened between North and South America.
- On purpose (by humans), like the introduction of the coffee plant in South America.
- By accident (by humans), like with the introduction of the rats all around the world, that were dwelling on the ships of the explorers and migrants and managed to get to new territories.
All three examples have been damaging to the native species, in one way or another, with the Smilodon managing to destroy the Thylacosmilus, the biggest marsupial carnivore of South America, because of the coffee plant people have been destroying other plants to make space for it, and the rats have been out-competing lots of species around the world for food and also transmitted diseases to them which resulted in their demise.
Answer:
invasive species
Explanation:
usa test prep
what travels through a food chain or web ?
The arrows in a food chain show the flow of energy, from the sun or hydrothermal vent to a top predator. As the energy flows from organism to organism, energy is lost at each step. A network of many food chains is called a food web. ... The trophic level of an organism is the position it holds in a food chain
In a food chain or food web, energy and nutrients move from one organism (producer) to those that consume them (consumers and decomposers), forming a cycle.
Explanation:In a food chain or web, energy and nutrients move from one organism to another. It starts with the producers (such as plants) that get their energy from sunlight through photosynthesis. Then, the primary consumers or herbivores (creatures that eat plants like rabbits, deer etc.) consume the plants and obtain their energy. Following this, the secondary consumers or carnivores (animals that eat primary consumers like foxes, eagles etc.) get their energy. Finally, decomposers (organisms that consume dead plants and animals, like fungi and bacteria) break down the dead organisms and return the nutrients back to the soil, completing the cycle.
Learn more about Food Chain here:https://brainly.com/question/31647677
#SPJ6
During the Carboniferous period, which occurred approximately 360 to 300 million years ago, most of Earth was covered in dense rainforests. These rainforests were sustained by a humid and tropical climate that lasted for most of the Carboniferous period. At the end of the period, Earth's climate became much colder and drier, leading to a wide-scale collapse of the rainforests and a significant loss of vegetation.
The statement is - True.
The Carboniferous period/epoch is a period that lasted approximately 60 million years, being between the Devonian, and Permian periods. It got its name because it is the period from which most of the coal originates on our planet. During the first half of this period, the planet was mostly covered in dense swampy forests, and the land life was developing very well. In the second half of it, because of the geologic activities that caused the continents to collide and form Pangaea, the climate changed, it became much colder and much drier, and lots of mountain ranges appeared, and this caused a large scale demise of the vast rainforests.
Answer:
Over millions of years, the decaying vegetation would have been buried and its carbon turned into fossil fuels.
Explanation:
what conclusion can you draw about this cell pictured
where is the picture?
The source of water for the Great Lakes was _______, which played a major role in forming the lakes during Earth's recent geologic past.
A.
erupting volcanoes
B.
stormy oceans
C.
manmade canals
D.
melting glaciers
The answers is D. melting glaciers
If the results of an experiment disprove the hypothesis, the test was poorly designed and is invalid.
True
False
it would be false cause of his test designed
The statement that an experiment is poorly designed or invalid if it disproves a hypothesis is false. Disproving a hypothesis through experiment is a fundamental part of the scientific process, helping to refine or develop new hypotheses and enhance scientific understanding.
The statement "If the results of an experiment disprove the hypothesis, the test was poorly designed and is invalid" is false. The scientific method is a critical process in which hypotheses are tested against observations or experiments. Disproving a hypothesis is an integral part of scientific inquiry, helping to refine or develop new hypotheses.
A hypothesis is an educated guess based on existing knowledge. Scientists design experiments specifically to test these hypotheses. When an experiment disproves a hypothesis, it does not indicate poor design or invalidity; rather, it provides valuable data. This outcome can lead scientists to revise their hypotheses or to develop new ones that better explain the observed phenomena.
Furthermore, disproving a hypothesis does not weaken the practice of science but strengthens it by eliminating less accurate explanations, thereby narrowing the search for truth. This process is fundamental to scientific progress, contributing to our understanding of the natural world. It is important to remember that a single experiment's results can neither prove nor disprove a hypothesis definitively
Which processes are affected by freeze and thaw cycles? check all that apply
A) creep
B) deposition
C) landslide
D) slump
E) weathering
creep and slump but im not sure about the other options
Answer:
A. creep
D. slump
Freezing and thawing is rapid heating and cooling of the material due to change in weather conditions. Creep and slump are formed due to mass wasting or movement of particles down the slope. The slump is the downward movement of loose soil and rocks. The creep refers to movement of highly withered or loose material down the slope. Both slump and creep occurs due to the force of gravity. The materials in both creep and slump are displaced from their origin because of rapid heating and cooling or freezing and thawing.
what is the purpose of ethical guidelines for handling of experimental subjects
The purpose of ethical guidelines for handling of experimental subjects is to ensure the safety and well-being of all living creatures in an experiment.
Ethical guidelines include issues such as human rights, animal welfare, safety compliance with the law, conflicts of interest, health standards..
Ethical guidelines are the norms for the acceptable and unacceptable behaviors of the researchers.
Answer: To ensure the safety and well-being of all living creatures in an experiment
Explanation:
where is carbon stored within the biosphere?
Carbon is stored on our planet in the following major sinks (Figure 9r-1 and Table 9r-1): (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits ...
Carbon is stored in the biosphere in the atmosphere, oceans, ocean sediments, soil, land sediments including fossil fuels, and the Earth's interior.
Explanation:In the biosphere, carbon is stored in various carbon reservoirs, which are critical components of the biogeochemical carbon cycle. Earth's atmosphere serves as a significant repository, with carbon dioxide being a major form of carbon here. The oceans are the largest carbon store, with vast amounts of carbon present in both the water and the ocean sediments.
Additionally, carbon is found in soil, where it is a part of organic matter and is processed by a multitude of soil organisms. Land sediments contain carbon in the form of fossil fuels, and Earth's interior also stores carbon, which can be released via volcanic activity. These reservoirs help regulate the global climate by acting as sources and sinks for carbon, which has implications for climate change and the greenhouse effect.
As conditions change inside and outside the cell, the cell must adjust to maintain a stable internal environment. Which of the following is NOT an example of how cells maintain homeostasis?
A. The cell membrane regulates what enters and exits the cell.
B. The nucleus contains all the genetic information of the cell.
C. Lysosomes break down molecules to excrete from the cell.
D. A cell began to repair skin cells through the process of mitosis.
Among the options provided, the function of the nucleus containing the genetic information of the cell does not directly support homeostasis. Cellular activities like selective permeability of the cell membrane, waste breakdown by lysosomes, and cell repair through mitosis help maintain internal stability.
Explanation:Homeostasis in a cell refers to the maintenance of a stable internal environment within a cell regardless of changes in internal or external conditions. Answer choice B, 'The nucleus contains all the genetic information of the cell', does not provide an example of a cell maintaining homeostasis. While it's true the nucleus contains all the genetic information of a cell, this function does not directly aid in the adjustment of the cell to maintain homeostasis.
On the other hand, options A, C, and D all involve activities that help cells maintain internal stability despite changing conditions. The cell membrane controls the movement of substances in and out of the cell, lysosomes break down waste materials, and cells repair themselves through mitosis—all of which contribute to homeostasis.
Learn more about Cell Homeostasis here:https://brainly.com/question/3888340
#SPJ3
Which is not a source of meteoroids?
material from the asteroid belt
leftover interplanetary debris
the solid remains of comets
rocky chunks from neighboring solar systems
It's obviously D. There's no way that anything from another solar system would hit our planet because it wouldn't leave its' galexy's orbit.
Rocky chunks from neighboring solar systems is not a source of meteoroids.
Meteoroids are relatively small (sand to boulder-sized) fragments of rock orbiting the Sun inside the solar system. Meteoroids are usually formed from three main sources which are; (i) the collision of asteroids which produces crumbly debris (meteroids) in the asteroid belt, (ii) the solid remains of comets which occurs due to huge meteor showers and (iii) leftover from the debris that formed the solar system. Rocky chunks from neighboring solar systems is not a source of meteoroids.
Most multicellular organisms are composed of cells with different shapes and sizes, and those cells perform different functions. What is the best explanation for this? A. Mutations accumulate in an organism's cells, causing them to become different from the other cells. B. The structure and function of an organism's cells is determined by the genetic material it receives during fertilization. C. As cells divide, they only pass on the genetic material that will be used in the daughter cells. D. Environmental conditions influence gene expression, which determines how a cell develops.
The answer is D.) Environmental conditions influence gene expression, which determines how a cell develops.
The variety of cell shapes, sizes, and functions within a multicellular organism is primarily due to the genetic material it inherits during fertilization. This genetic material guides cell development and specialization, with different genes being expressed in each cell, allowing cells to perform various roles. This specialization facilitates the organization and coordination necessary for complex, multicellular life to thrive.
Explanation:The best explanation for the existence of different cell types, shapes, and functions within multicellular organisms is primarily driven by the genetic material received during fertilization, which then influences how a cell develops and specializes (option B). This differentiation process enables cells to assume varying roles within an organism, such as muscle cells for movement, skin cells for protection, and liver cells for detoxification. The instructions for these specialized cell types are coded within an organism's genome.
These differences in structure and function are the result of the selective expression of genes in each cell - essentially, certain genes are 'turned on' while others remain 'turned off', which tailor the cell for its specific role. Moreover, cells can express different genes at different times in response to various environmental stimuli.
Thus, an organism's genetic material doesn't only influence an organism's traits, but also the specializations of its cells, enabling complex, multicellular life to exist, grow, and adapt. The diversified features allow multicellular organisms to respond adequately to a variety of environmental conditions, enhancing their survival and ability to reproduce.
Learn more about Cell Specialization here:https://brainly.com/question/12730320
#SPJ2
If the ribosomes of a cell were destroyed, what effect would this most likely have on the cell?
The destruction of ribosomes in a cell would halt protein synthesis, leading to a severe reduction in cell functionality or cell death, as ribosomes are crucial for assembling proteins necessary for all cellular processes.
Explanation:If the ribosomes of a cell were destroyed, it would have a profound impact on the cell's ability to synthesize proteins. Ribosomes are essential cellular organelles that read the information encoded in messenger RNA (mRNA) to assemble amino acids into polypeptides chains, which then fold into functional proteins. These proteins are vital for virtually all cell functions, including metabolism, structural integrity, and signaling.
Without functional ribosomes, cells would not be able to produce these necessary proteins. For example, in liver cells, the lack of protein production could lead to diminished blood proteins, impacting immune system functionality and blood transport. Similarly, since the rough endoplasmic reticulum (RER) is studded with ribosomes, its function in protein processing and folding would also be compromised. The consequences would be dire, potentially causing cell death or significant loss of function, as protein synthesis is critical for cell survival and maintenance.
Moreover, in scenarios where mutations occur – such as in the 60S ribosomal subunit or in the nucleolus which is responsible for ribosomal assembly – the effects on protein translation can include stalling or producing defective proteins, which can be detrimental to the cell's health and functioning. Overall, the destruction of ribosomes would halt protein synthesis, leading to an accumulation of nonfunctional proteins and ultimately, cellular dysfunction or death.
which is a measure of the force of gravity on an object ?
This is called weight and is measured in pounds.
Decide if each statement is a fact or a misconception about the theory of evolution by natural selection. The theory proposes that while natural selection acts on individuals, only populations evolve. The theory suggests that the organisms in a population that are the most well adapted are those that are the largest. According to the theory, individual organisms can evolve during their lifespan. The theory says that organisms that are better adapted to their environments will have higher survival and reproduction rates. The theory explains the origin of life. The theory says that natural selection gives organisms everything they need to live.
Natural selection is the process by which organisms are able to survive and produce offspring who use their environment successfully as compare to those which are less adapted to their environment.
The theory proposes that while natural selection acts on individuals, only populations evolve. Fact The theory suggests that the organisms in a population that are the most well adapted are those that are the largest. FactAccording to the theory, individual organisms can evolve during their lifespan. Misconception The theory says that organisms that are better adapted to their environments will have higher survival and reproduction rates. Fact The theory explains the origin of life. Misconception The theory says that natural selection gives organisms everything they need to live. Misconception
The theory of evolution by natural selection is a factual framework that describes how populations, not individuals, evolve over time. While it states that well-adapted organisms have higher survival rates, it does not suggest that being larger is necessarily better, nor does it explain the origin of life or imply that organisms evolve during their lifetime.
Explanation:Understanding the Theory of Evolution by Natural Selection
Deciding if each statement is a fact or a misconception about the theory of evolution by natural selection:
The theory proposes that while natural selection acts on individuals, only populations evolve. This is a fact. Natural selection acts on individuals, but evolutionary change occurs in the genetic makeup of populations over time.The theory suggests that the organisms in a population that are the most well adapted are those that are the largest. This is a misconception. Being the largest is not synonymous with being well-adapted; adaptations depend on the specific environment and survival needs.According to the theory, individual organisms can evolve during their lifespan. This is a misconception. Individuals cannot evolve; evolution is a process that occurs across generations within a population.The theory says that organisms that are better adapted to their environments will have higher survival and reproduction rates. This is a fact. Organisms with traits that confer a survival advantage are more likely to reproduce and pass on those traits to their offspring.The theory explains the origin of life. This is a misconception. Evolution explains the diversity of life and how species change over time, not how life began.The theory says that natural selection gives organisms everything they need to live. This is a misconception. Natural selection acts on existing traits but does not "give" traits; it favors traits that enhance survival and reproduction in a given environment.Natural selection and evolution are crucial concepts in biology that explain how populations change over time due to environmental pressures and genetic variation, leading to the current diversity of life forms on Earth.
Writing about How the Endocrine and Exocrine Systems Maintain Homeostasis
Which statement is an example of a scientific theory?
A.
Hummingbirds do not like the color white because they visit other colored flowers more often.
B.
All living organisms are composed of one or more cells, which came from pre-existing cells.
C.
The Earth is the third planet from the Sun and has one moon, which orbits the Earth.
D.
The amount that caffeine affects a person's heart rate differs based on the person's age.
The correct answer is option B, that is, all living organisms are composed of one or more cells, which came from pre-existing cells.
A scientific theory refers to a well-substantiated illustration of some characteristic of the natural world, on the basis of a number of facts, which have been repeatedly confirmed via the experiment and observation. Such fact-supported theories are not hypotheses, however, are reliable explanations of the real world.
During the late 1830s, the zoologist Schwann and the botanist Schleiden were examining tissues and postulated the unified cell theory. According to the unified cell theory, all the living things comprises of one or more cells, the cell is the fundamental unit of life, and the new cells originate from the pre-existing cells.
the right answer sense nobody can get it right is C (on the test) all living organisms are composed of pussss one or more cells duh.
Packaging center of a cell
The Vacuole is the packaging center in the cell.
Hope that helps :)
The 'golgi complex' basically functions as a packaging center for the cell.
The organ in the body work together like members of a pit crew servicing a race car . What other analogies can you think of to illustrate organ system working together
Final answer:
Organ systems are like a sports team or an orchestra where each player or instrument, respectively, plays a specific role, but they all need to work together harmoniously for the success of the team or the creation of a symphony.
Explanation:
An organ system is a group of organs that work closely together to perform the functions needed for the body to function properly. One analogy to describe how organ systems work together is comparing them to a sports team. Every player or organ has a specific role, but they must work in concert to win a game or keep the body healthy. Another comparison is that of an orchestra, where different instruments or organs each play their own part, but collectively they create a symphony or maintain body health.
Examples of Organ Systems
The nervous system, which includes the brain, spinal cord, and nerves, coordinates the body's activities by receiving and sending information.
It is essential that these organ systems work together synergistically to ensure the organism's survival, much like how individual team members or musicians must collaborate to achieve their shared goal.
why cant or shouldnt you use pet waste in compost
Using pet waste in compost presents several challenges and risks that make it generally not recommended for composting.
1. Pathogens: Pet waste can contain harmful pathogens such as bacteria, viruses, and parasites, including E. coli, Salmonella, and Toxoplasma gondii, which can survive in composting conditions and pose health risks to humans and animals if the compost is not properly managed or reaches maturity.
2. Parasites: Parasitic organisms like roundworms (such as Toxocara spp.) and hookworms (such as Ancylostoma spp.) commonly found in pet waste can persist in compost and potentially infect humans and animals upon exposure.
3. Odor: Pet waste has a strong and unpleasant odor, which can persist during composting and may attract pests like flies, rodents, and other scavengers.
4. Nutrient imbalance: Pet waste tends to be high in nitrogen and can imbalance the carbon-to-nitrogen ratio (C:N ratio) of compost, leading to slow decomposition and the production of ammonia and other volatile compounds, which can be harmful to plants and soil organisms.
5. Regulatory concerns: In some areas, using pet waste in compost may be regulated or prohibited due to concerns about public health and environmental contamination.
Instead of composting pet waste, it's recommended to dispose of it properly through methods like flushing it down the toilet (for cat litter that is specifically designed for flushing), burying it in a dedicated pet waste digester, or using specialized pet waste disposal systems. These methods help minimize the risks of contamination and ensure proper management of pet waste.
The complete question is;
Why cant or shouldnt you use pet waste in compost?
what kind of bond forms between oxygen and hydrogen in a single water molecule?
The bond that forms between oxygen and hydrogen in a single water molecule is a: Covalent bond
Therefore, option 1 is correct
- A covalent bond involves the sharing of electron pairs between atoms, resulting in the formation of a stable molecule.
- In a water molecule (H2O), each hydrogen atom shares its electron with the oxygen atom, forming two covalent bonds.
- These shared electrons create a stable arrangement, allowing the water molecule to maintain its structure and properties.
- Covalent bonds are formed through the sharing of electron pairs between atoms.
- In a water molecule (H2O), each hydrogen atom shares its single electron with the oxygen atom.
- Oxygen has six valence electrons and can share two pairs of electrons, allowing it to form two covalent bonds with the two hydrogen atoms.
- This sharing of electrons results in a stable arrangement where each hydrogen atom has a full outer shell (two electrons), and oxygen has a full outer shell (eight electrons).
- Covalent bonds are strong and hold the atoms together to form molecules like water.
The complete Question is given below:
The bond that forms between oxygen and hydrogen in a single water molecule is a:
1) Covalent bond
2) Ionic bond
3) Hydrogen bond
4) Polar bond
What are two ways that diatoms differ from slime molds? Choose the correct answer from the drop-down menu.
The external coverings of diatoms are made up of [peptidoglycan, silica, or chitin], while slime molds have cell walls containing [silica, chitin, or peptidoglycan]. Diatoms are [chemoautotrophs, photoautotrophs, or chemoheterotrophs] because they make food through photosynthesis, while slime molds are [autotrophs, phototrophs, or heterotrophs].
Answer:
The external coverings of diatoms are made up silica , while slime molds have cell walls containing cellulose. Diatoms are photoautotrophs because they make food through photosynthesis, while slime molds are heterotrophs.
Explanation:
Diatoms can be described as algae that are mostly single-celled. They are made up of a unique kind of cell wall composed of silica. This cell wall is termed as a frustule. Mostly, diatoms are capable of carrying out photosynthesis and hence make their own food.
Slime moulds can be described as organisms that are fungus-like protists. They are not capable of producing their own food and feed on other plants. Hence, they are heterotrophs.
Diatoms' external coverings consist of silica and they are photoautotrophs due to their ability to perform photosynthesis, whereas slime molds have cell walls with chitin and are heterotrophs.
Explanation:Two ways in which diatoms differ from slime molds include the composition of their external coverings and their nutritional modes. The external coverings of diatoms are made up of silica, similar to glass or sand, and are known for their intricate, sculptured frustules. In contrast, slime molds typically have cell walls containing chitin or are wall-less when they are in their amoeba-like stage. Furthermore, diatoms are photoautotrophs because they perform photosynthesis to produce their food using sunlight, carbon dioxide, and water. Slime molds, on the other hand, are heterotrophs, obtaining their nutrients by consuming other organisms or organic matter. This fundamental difference reflects their distinct strategies for survival and reproduction within their respective ecosystems.
Learn more about Diatoms and Slime Molds here:https://brainly.com/question/11502776
#SPJ3