magnetite is________that acts like a magnet
A.a compass
B.an electric circuit
C.a mineral
D.a planet
Answer:
C. a mineral
Explanation:
magnetite is a naturally-occuring mineral found in the lithosphere. Like other metals (such as iron), it has electromagnetic properties.
why is the late Cambrian thought of as the period of the greatest evolutionary change in life forms on earth's history?
Answer:
The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion," because of the relatively short time over which this diversity of forms appears.
20 Points!!!! Answer ASAP!!! Describe the process of oil extraction in complete sentences. Be sure to include information about how the process has changed in recent years.
Oil extraction is the process of recovering crude oil from underground reservoirs, in recent years, the process of oil extraction has changed, with new technologies and techniques allowing for more efficient and cost-effective oil production.
What is oil extraction?
The process of oil extraction involves drilling wells into the earth and then using various techniques to bring the oil to the surface, and the first step in oil extraction is to identify a suitable location for drilling, which is typically done using geologic surveys and other exploration techniques to locate areas with the potential for oil reserves, next step is to complete the well by installing a casing that helps to prevent the well from collapsing. Technologies such as "hydraulic fracturing," which involves injecting water and sand and assisting in the release of trapped oil and gas, have recently gained popularity.
Hence, it is the process of recovering crude oil from underground reservoirs, in recent years, the process of oil extraction has changed, with new technologies and techniques allowing for more efficient and cost-effective oil production.
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dichotomous key of a cockroach
Answer:
Identification of cockroaches is limited here to adults. A major source of confusion is the recognition of adults from nymphs.There are subjective differences, as well as morphological differences. Immature cockroaches are known as nymphs. Nymphs closely resemble adults except nymphs are generally smaller and lack wings and genital openings or copulatory appendages at the tip of their abdomen. Many species, however, have wingless adult females. Nymphs of these may be recognized by their shorter, relatively broad cerci and lack of external genitalia. Male cockroaches possess styli in addition to paired cerci. Styli arise from the subgenital plate and are generally conspicuous, but may also be reduced in some species. Styli are absent in adult females and nymphs
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Through which blood vessel does blood flow back into the heart
[tex] \huge \sf \colorbox{aqua}{Answer}[/tex]
The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart. Arteries begin with the aorta, the large artery leaving the heart.
Students use alphabet letters to represent the genetic instructions for a trait of an organism. The students write these alphabet letter in graphic organizers. The students are trying to show genetic instructions passing from parent to offspring.
Which graphic organizer does NOT represent asexual reproduction?
Answer:
It’s B
Explanation:
Which of the following is a function of proteins?
(2 points)
repairs body tissue
speeds up chemical reactions
prevents infections & illness
all of the above
Which of the following is the best solution to meet energy demands while protecting the environment?
A grow more corn to produce ethanol
B. build more nuclear power plants
C. find and burn new sources of oil and coal
D. improve energy efficiency and reduce energy waste
Answer: D
Explanation: just took the quiz
The best solution that meets the energy demands while protecting the environment is to improve energy efficiency and reduce energy waste. Thus, the correct option for this question is D.
What is the Environment?The environment may be defined as a sum total of all forms of living and non-living elements and their consequences that significantly influence human life. It includes biotic and abiotic factors. The term environment is first given by Carlyle.
The protection of the environment requires a lot of actions by humans and the cooperation of other living organisms as well. All these actions impact the protection of the environment and improve energy efficiency along with the reduction in energy waste.
Therefore, improving energy efficiency and reducing energy waste is the best solution that meets energy demands while protecting the environment. Thus, the correct option for this question is D.
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What is the function of the nucleus within a cell?
Answer:
It is responsible for protein synthesis, cell division, growth and differentiation.
Answer:
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.
Write the letter of the correct answer on the line at left.
7.
Benny uses a compass to navigate his way through the woods when he
is carnping. The needle on the compass reacts to Earth's magnetic field
by always pointing north. Which part of Earth is responsible for creating
its magnetic field?
A. Cilist
B. inner core
C. mantle
D. outer core
Answer
Outer Core
Because of the weight of the melting moving metal creates energy
Our planet is shielded from cosmic radiation and charged particles from our Sun by the magnetic field, which is created by the motion of molten iron in the Earth's core. It also offers the framework for compass navigation. Thus, option D is correct.
What role of outer core of earth in magnetic field?Radiative heating and chemical differentiation have caused the Earth's outer core to be in a state of turbulent convection.
The convective kinetic energy is transformed into electrical and magnetic energy through a mechanism that is somewhat similar to a naturally occurring electrical generator.
The magnetic field is not produced by the earth's core, since metals lose their magnetic characteristics at high temperatures.
Therefore, Because of the weight of the melting, moving metal creates energy.
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How did the concept of biodiversity originally become more excepted in the scientific community?
Answer:
The Importance of Biodiversity
Increase ecosystem productivity; each species in an ecosystem has a specific niche—a role to play.
Support a larger number of plant species and, therefore, a greater variety of crops.
Protect freshwater resources.
Promote soils formation and protection.
Provide for nutrient storage and recycling.
Explanation:
Is circulation an essential life process?
Answer:
The circulatory system is extremely important in sustaining life.
Explanation:
Hope this helps, sorry if incorrect
Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up
by the cattle, and the cattle don't care if they are there or not.
A.Mutualism
B.Commensalism
C.Parasitism
Answer:
B.
Explanation:
Name THREE products in the food industry that are produced by biotechnology
Classify each planet as an inner planet or an outer planet.
HELLLLPPPPPPPPPPP HURRY
Answer:
A
Explanation:
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what type of organisms are included in protista
Answer:
Hey mate !! Answer :- The organism included in kingdom protista are :- 1) Amoeba 2) Algae 3)paramoecium 4)Eugulena etc . Common character among them is :- They are unicelluar organisms.
Explanation:
What is a known health problem caused by smokeless tobacco?
emphysema
lung cancer
mouth cancer
cataracts in the eyes
Other effects
can lead to a nicotine addictioncauses cancer of the mouth, esophagus (the passage that connects the throat to the stomach), and pancreas (a gland that helps with digestion and maintaining proper blood sugar levels)can increase risks for early delivery and stillbirth when used during pregnancymay increase the risk for death from heart disease and strokeAnswer:
Mouth Cancer, examples of smokeless Tabaco are chew and dip.
why is being heterozygous for sickle cell anemia considered an advantage?
Answer: They may be maintained by heterozygote advantage
For example, the allele that causes sickle cell anemia is deleterious if you carry two copies of it. But if you only carry one copy of it and live in a place where malaria is common, the allele is advantageous because it confers resistance to malaria.
Explanation:
Hope this helped
Democracy And human rights
Answer:
Democracy is one of the universal core values and principles of the United Nations. Respect for human rights and fundamental freedoms and the principle of holding periodic and genuine elections by universal suffrage are essential elements of democracy.
Explanation:
In a process called transpiration, plants get rid of excess water through pores in the leaves called
stomata. This excess water is then released into the atmosphere as part of the water cycle. Which of
the following terms best describes how the released water enters the atmosphere?
O precipitation
condensation
O capillary action
O evaporation
Answer:
evaporation
Explanation:
Answer:
Evaporation
Explanation:
what are the two main types of chemical bonds?
Answer:
Chemical bonds include covalent, polar covalent, and ionic bonds. Atoms with relatively similar electronegativities share electrons between them and are connected by covalent bonds. Atoms with large differences in electronegativity transfer electrons to form ions. The ions then are attracted to each other.
Two of the strongest forms of chemical bond are the ionic and the covalent bonds. Chemical bonds form between two atoms, each with its own electron environment.
Hope it helps!!!
Answer:
the two main types of chemical bonds are:
ionic bonds and covalent bonds.
How are mid-ocean ridges formed at divergent tectonic plates?
The plates are moving in a zigzag formation, creating shallow earthquakes which forms a mid-ocean ridge.
Mid-ocean ridges are not resulting features of ocean-to-ocean divergent boundary zones.
The plates are moving towards each other, which causes the crust to buckle and push upwards or sideways which forms a mid-ocean ridge.
The stretching lithosphere is pushed up as the plates move apart.
Answer:
The stretching lithosphere is pushed up as the plates move apart.
Explanation:
Mid-ocean ridges are basically underwater mountains that are created with the help of lava convection (which causes the rising of plates) and the diverging (the pulling away) of tectonic plates. This is also how ocean floor spreading happens.
I know that mountains are formed by the converging of tectonic plates, but ocean ridges are NOT created like this.
Hope this helps :)
What would happen to food chain save all the plans died out justify your answer
Answer:consumers include herbivores, carnivores, and decomposers. If the plants or other producers of an ecosystem were removed, there would be no way for energy to enter the food web, and the ecological community would collapse.All living organisms hold a place in the food chain, structured around the transfer of life-sustaining energy through an ecosystem: from sunlight to plant to rabbit ...
Hope this helps have a awesome night/day❤️✨Explanation:
In the 1970s, the pesticide DDT was used to kill insects that damaged fruit and vegetable crops. Most insects died from being exposed to DDT, but some survived. These surviving insects contributed to an increase in their population by
Answer:
gaining modification in their Gene's which helped them to resist that particular pesticide
These surviving insects contributed to an increase in their population by passing genes for DDT resistance to the next generation.
What is a resistance gene?In order to survive, bacteria can create mechanisms known as resistance against antibiotics and antifungals. The germ's resistance mechanisms are determined by the specific proteins that DNA instructs the germ to produce. Many different forms of resistance genes can be found in bacteria and fungi.
Once a bacteria have acquired a resistance gene and incorporated it into its DNA, the bacterium can dominate other bacteria and convey the resistance gene to all of its offspring. Bacteria reproduce quickly, which amplifies resistance.
Hence, These surviving insects contributed to an increase in their population by passing genes for DDT resistance to the next generation.
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what are the reactants of the krebs cycle?
Answer:
The only reactants of the Krebs cycle proper are acetyl CoA and the four-carbon molecule, oxaloacetate.
Are the insulin and hemoglobin genes found in each of our cells?
yes
no
Answer:
yes
Explanation:
Why is it important for older adults to get a colonoscopy?
Answer:
The older you get the greater chance you have for colon cancer.
Explanation:
Answer:
It is important for older adults to get a colonoscopy to check for any signs of cancer.
plants retain their leaves year round.?
Explain how you are dependent upon at least one biotic and one abiotic factor.
Answer:
Biotic: We are dependent on plants, because we need them to eat.
Abiotic: We are dependent on water, because we need water to hydrate.
Hope this helps! <3
An example of a biotic and an abiotic factor that humans depend on are -
Biotic factor - plantsAbiotic factor - oxygenThe biotic factor is a factor that presents in an ecosystem that are living organisms and help in making and shaping ecosystems such as plants, animals, fishes, and others.
Human depends on the other organism mostly on plants for their food and energy as they can not produce their food.The abiotic factor is the nonliving factor that interacts with the living organism or biotic factors to regulate and shape the ecosystems. It includes the carbon cycle, water, oxygen, temperature, and many others.
Humans depend on oxygen for their cellular respiration that provides energy for all essential cellular functions and without oxygen, there is no life present.Thus, the correct examples are:
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