Answer:
subsistence agriculture
Explanation:
The land is limited, cultivation systems are basic, and there is not enough harvest to sell.
2
What are the three main things that bacteria need to survive?
ОА
food, water, oxygen
Ов.
dirt, space, heat
Ос.
ice, incubation, oil
OD
fat, liquid, nitrogen
The three main things that bacteria need to survive are dirt, space and heat. Thus option B is correct.
What are bacteria?Bacteria are defined as a creatures without a proper nucleus and only a few organelles that are prokaryotic unicellular organisms.
It can also be defined as the creatures with simpler cells than many others, such as bacteria.
There are five types of bacteria classified on the basis of there shapes.
Spherical shape (Cocci)Rod (bacilli)Spiral (spirilla)Comma (vibrio's) Corkscrew (spirochetes)Three distinguishing characteristics of bacteria are:
Their lack of membrane-bound organelles, Their unicellularity, Their small (often microscopic) size.Not all prokaryotes are bacteria; others are archaea, which, despite sharing some physical characteristics with bacteria, are unrelated to bacteria in origin.
Thus, the three main things that bacteria need to survive are dirt, space and heat. Thus option B is correct.
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Which term names a property or mineral
Answer: Streak
Explanation: For k12 Science Unit 2 test
answer pls and thank u
Dr. Schweitzer found structures identical to modern red blood cells and blood vessels inside the bone. Which organ system do blood cells and blood vessels belong to? A. circulatory system B. nervous system C. respiratory system D. skeletal system
Answer:
A. Circulatory system
Explanation:
Circulatory system consist of heart,blood cells&blood vessels
What happened to the color of peppered moths after govermental regulations were put in place to decrease air pollution?
A. moths that were lighter in color became more fit over time
B. moths became lighter during their lifetime and passed on the alleles for lighter color to their offspring
C. moths became darker during their lifetime and passed on the alleles for darker color to their offspring
D. moths that were darker in color became more fit over time
Answer:
A
Explanation:
While B seems to be correct, it is A because evoulution requires time and a moth would not have undergone such dramatic phenotypic change in its lifetime.
what would a low number of oxygen bubbles indicate about photosynthesis
A low number of oxygen bubbles indicates the rate of photosynthesis.
What is Photosynthesis?This is the process in which green plants manufacture their food. Carbon dioxide is used up and oxygen is given off during this process.
The bubbles means oxygen is present which translates to a low number of bubbles depicting a decrease in photosynthetic activity and vice versa.
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A gene showing codominance
Which of the following BEST describes the hydrosphere?
WILL GIVE BRAINLIEST
A. bodies of water on the surface of Earth, but not the water in the atmosphere or underground
B. salt water in the oceans, but not fresh water
C. water that is underground or mixed into the geosphere
D. water in any location on Earth, including the atmosphere, surface, and underground
Answer:
A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. ... The frozen part of Earth's hydrosphere is made of ice: glaciers, ice caps and icebergs. The frozen part of the hydrosphere has its own name, the cryosphere.
A solution is a chemical reaction?
Answer:
False
Explanation:
A solution does not have to be a chemical reaction. Salt and water is a perfect example. Even though salt will dissolve in water, there is no chemical reaction going on. Salt remains salt and water remains water. The salt can easily be recovered by evaporating off the water.
Some solutions can be a chemical reactions but not all have to be.
NEED HELP PLZ
The following statement is incorrect. Change two words to make it correct.
Capillary action happens when water moves up a vessel against gravity. It is a result of density and solubility working together.
NEED HELP PLZ
Answer:
Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules. The height to which capillary action will take water in a uniform circular tube (picture to right) is limited by surface tension and, of course, gravity.
Explanation:
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When the cohesive forces between the liquid molecules are greater than the adhesion to the walls, capillary action results. Surface tension and, of course, gravity set a limit on how high capillary action may raise water in a uniform circular tube (see image to the right).
What is Capillary action in plants?Water is transported to the remainder of the plant by capillary action up the stems and roots. Through the plant, water is transported through capillary action.
Water (the liquid) molecules are drawn to the molecules of the stem's interior (the solid).
The purpose of this attraction is to help lift the water out of the ground and distribute it throughout the plant.
When the forces holding a liquid together—cohesion and surface tension—and the forces drawing that liquid to another surface—adhesion—are stronger than the force of gravity, capillary action takes place.
Therefore, through cohesive forces and surface tension, water moves up a vessel against gravity.
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Why is antibiotic resistance dangerous?
Answer:
Antibiotic resistance is one of the most urgent threats to the public’s health. Antibiotic resistant bacteria can cause illnesses that were once easily treatable with antibiotics to become untreatable, leading to dangerous infections. Antibiotic-resistant bacteria are often more difficult to kill and more expensive to treat.
Explanation:
13. Processes and ships proteins
out of the cell.
Answer:
Golgi Apparatus
Explanation:
How many chromosomes would there be in each cell after meiosis I?
Answer:
it would be 23 chromosomes
Explanation:
my teacher just told me yesterday
URGENT PLEASE:
Explain how a lack of carbohydrates will impact cellular functions and why?
Answer:
Carbohydrates they say is the major classes of food and don't forget they are stored by stach in the body and gives your body energy
Carbohydrates are degraded into sugar which, as a primary source, is required for the brain, muscles and other parts of the human body to function normally.
When you don't get enough carbohydrates, the level of sugar in your blood may drop to below the normal range (70-99 mg/dL), causing hypoglycemia.
If molecules are small enough then
sorry what this means¯\_(ツ)_/¯
what are the objective of air pollution?plz guys ans.
Answer:
Aims of Air Pollution.
Explanation:
What's the definition of epista
sis
Epistasis is genetic phenomenon that is defined by an interection of genetic variation loci
Answer:
(Hope this helps can I pls have brainlist (crown)☺️)
Explanation:
The interplay of genes that determines phenotype is known as epistasis. Genes may either hide each other, making one "dominant," or they can mix to create a new characteristic. It's the conditional link between two genes that can determine a single phenotype for certain features.
Epistasis is a term used in genetics to describe the interaction of genes at two or more loci, as a consequence of which the gene's impact is influenced by the presence of one or more modifier genes. One gene or allele in the interaction is obscuring the phenotypic expression of the other genes or alleles. Epistatic refers to the gene or allele that masks the impact. The other gene(s) or allele(s) being masked, on the other hand, is/are referred to as hypostatic. Epistasis can be dominant or recessive. The fur colour of Labrador retrievers, which is a polygenic feature, is an example of epistasis. Its fur colour is determined by the interaction of two genes.
What does the term temperature control refer to
Answer:
the term temperature control refers to Thermostats .....
A device called a temperature controller is used to maintain a target temperature at a given level. The typical thermostat seen in homes is the most basic type of temperature controller.
What are the biological temperature control factors?
The hypothalamus, a region of the brain, controls our body's core temperature. The hypothalamus measures our body's temperature and compares it to the average temperature, which is around 37 degrees Celsius.
The hypothalamus ensures that the body produces and maintains heat if our body temperature falls too low.
Progesterone tends to encourage heat conservation and higher body temperatures, whereas estradiol tends to increase heat dissipation.
Therefore, a thermostat seen in homes is the most basic type of temperature controller.
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which of these is an effect of an algal bloom
Answer:
An increase growth in microorganisms results in oxygen depletion
Explanation:
The growth of algal bloom is caused due to excessive runoff rich in the nutrients like nitrogen and phosphorous. This run off comes from the agricultural field.
These nutrients aids in the growth of the algae(microorganisms) in large number. This growth forms a layer on the water body and use the oxygen present in the water and makes the water oxygen deficient.
Who is more closely related, lizards of the same ecomorph, or lizards that live on the same island?
Answer:
The DNA evidence suggests that species from the same island are more closely related than are species from the same ectomorph group.
Explanation:
This finding supports the hypothesis that most of the lizards on each island evolved independently, in a process of convergent evolution, although there are exceptions.
Which of the following is an example of how electrical energy can be generated?
Answer:
C I guess..
Explanation:
becuse water currents are used to generate electricity...
Wind turning a tightly wound coil inside a magnet is an example of how electrical energy can be generated.
What is an example of electrical energy?As the charges that cause the energy are moving, electrical energy is a form of kinetic energy. Lightning, batteries, and even electric eels are examples of electrical energy in action.
What can generate electrical energy?Most electricity is generated with steam turbines using fossil fuels, nuclear, biomass, geothermal, and solar thermal energy. Other major electricity generation technologies include gas turbines, hydro turbines, wind turbines, and solar photovoltaics.
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Describe the cycling of carbon in the carbon cycle as it passes through the living and non-living components of the ecosystem.
Answer: Photosynthesis, Decomposition, Respiration and Combustion
Explanation:
The cycling of carbon in the carbon cycle is released from animals and plants in form of carbon dioxide through respiration or released by decomposition and internalized by a process called photosynthesis in plants.
The carbon cycleIt initiates when a plant dies and gets buried turning into fossil fuel. This fossil fuel is burnt by humans converting most of the carbon into carbon dioxide.
Carbon dioxide is added to the atmosphere by respiration of animals and the plants. Plants again use this carbon dioxide to perform photosynthesis thus quickly adding it to their bodies from where the cycle continues.
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in developed countries which of the following is a positive effect of agricultural changes in the past century?
A. Desertification
B. Clearing rainforests
C. Contamination due to run off
D. Amount of food produced has increased
E. Nutrient rich soil for farmland increasing
In developed countries , amount of food produced being increased is a positive effect of agricultural changes in the past century.
Agricultural changes in developed countries were set up such as application of fertilizers etc so as to achieve a maximum yield as the increasing population all over the world means increase in food production to cater for individuals and to prevent starvation and death.
Agricultural changes were also done to ensure goods produced have a very high quality.
The remaining options such as Desertification, Clearing of rainforests and contamination can be referred to as part of the negative effect of agricultural changes in the past century.
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What is the answer for this question
How would you identify a floodplain that has not been immersed for a long time?
Answer:
Floodplains are identified as zones on FEMA Flood Insurance Rate Maps (FIRMs). Flood zones are defined by type, depth, and frequency of flooding. But the shape and nature of a floodplain may also change over time as the main channel of a river naturally migrates through erosion and accretion, impacting how and where excess water may first over top the banks of the river during a flood event. Geologically ancient floodplains are often represented in the landscape by fluvial terraces. These are old floodplains that remain relatively high above the present floodplain and indicate former courses of a stream. I HOPE THIS HELPS YOU :)
Explanation:
The geology of a floodplain the natural development of floodplains is primarily influenced by two processes: aggradation and erosion which help to identify that it has not been immersed for a long time.
What do we should know about floodplain ?
The flood fringe extends beyond the floodway. From the floodway's outer banks to a river valley's bluff lines, the flood fringe extends. The point at which the valley floor begins to rise into bluffs is marked by bluff lines, which are also known as valley walls.A generally flat area of land adjacent to a river or stream is known as a floodplain. It extends from the riverbanks to the valley's outermost edges. There are two components to a floodplain. The floodway, which is the river's primary channel, is the first. The channel may be dry for a portion of the year in floodways, which can sometimes be seasonal.The process by which earth is worn away by the movement of a floodway is referred to as the erosion of a floodplain. The term "aggradation" of a floodplain refers to the process by which earthen material expands as sediment is deposited by the floodway. A floodplain is eroded by a river as it meanders or curves.Floodplains are frequently made up of features like oxbow lakes and seasonal wetlands. These features are the result of erosion and deposition.A floodplain's erosion and aggradation, or accumulation of land elevation, may be exacerbated by a meandering stream. A river that is wide, shallow, and braided is a typical aggradation environment. River deltas, where the main floodway is divided into discrete channels and tiny islands, are frequently found in braided rivers.To know more about floodplains check this:
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What is the most complex level of organization in living things
Answer:
the biosphere
Explanation:
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
what are 3 facts about the documentary the big little farm
Answer:
Explanation:
The film premiered on September 1, 2018 at the Telluride Film Festival.[7] It had its second screening at the 2018 Toronto International Film Festival, where it was named second runner-up for the People's Choice Award: Documentaries.[8] It was selected as the Opening Night film at Doc NYC in November 2018.[9] The film was screened as part of the Spotlight Section at the 2019 Sundance Film Festival. It also screened at the 29th New Orleans Film Festival on October 24, 2018.[10]
The film was acquired for theatrical distribution by the independent film company Neon,[6] and was released on May 10, 2019 in Los Angeles and New York. The film expanded into Austin, Boston, Chicago, Dallas, Denver, Houston, Minneapolis, Nashville, Philadelphia, Phoenix, Portland, San Diego, San Francisco and Washington D.C on May 17 and additional markets throughout May and June. The film has been acquired by The Exchange for international distribution.[11]
Why does the process of
diffusion not require any
energy?
A. Solutions must reach equilibrium so the
cells start to move rapidly.
ast.
ney
B. The particles move randomly.
them
C. The nucleus controls the diffusion.
ut
Answer:
A. Solutions must reach equilibrium so the
cells start to move rapidly. i guess it is
Through which plants and animals obtain the nitrogen they need ?
Answer:
Plants take up nitrogen compounds through their roots. Animals obtain these compounds when they eat the plants. When plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposers
Explanation:
You've been tasked to study the movements of condensed chromosomes during cell division.
You have access to a magnifying glass, a standard light microscope, a scanning electron
microscope and a transmission electron microscope. Which piece of equipment would you choose
and why? Also why would you NOT choose the others? (max 50 words)
In order to see something as small as a chromosome, It is necessary to employ the use of a scanning electron microscope.
The question states that we wish to study the movements of condensed chromosomes during cellular division. This means that we will need a scope capable of not only looking inside of a cell but even inside of the nucleus of a cell, an extremely minute space.
Logically, a magnifying glass will not be able to accomplish this given that it only allows us to see macroscopic elements, many hundreds of times bigger than what we wish to observe. We run into similar limitations with standard light and transmission microscopes. Although these allow us to see things on a microscopic level, they fall short of the desired capability.
Though the transmission microscope can see even smaller elements than a standard light microscope, both are limited to the surface of cells. The SEM or scanning electron microscope, on the other hand, allows the user to see elements down to 0.1 nanometers in size. Given that chromosomes are between 10 and 30 nanometers in size, we can use this microscope for the desired study.
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