Examples of pure substances are elements and COMPOUNDS
2.Iron and aluminum are examples of PURE SUBSTANCES
3.a MIXTURE is a physical combination of things that can be seperated
The study of chemicals and bonds is called chemistry. There are different types of elements and these are metals and nonmetals.
The correct answer is mentioned below.
What is a mixture?A mixture is a material made up of two or more different chemical substances which are not chemically bonded. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.According to the question, the correct answer is as follows:-
Examples of pure substances are elements and COMPOUNDSIron and aluminum are examples of PURE SUBSTANCESA MIXTURE is a physical combination of things that can be separatedFor more information about the mixture, refer to the link:-
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The nucleus is a structure that surrounds a cell and helps control what enters and exits the cell.
The nucleus is the cell's control center, housing the genetic instructions. Enclosed by a nuclear envelope, it regulates transport of material into and out of the nucleus. However, not all cells contain a nucleus.
Explanation:The nucleus is a crucial component of a cell, often considered its control center because it houses the cell's genetic instructions or DNA. This genetic material determines the entire structure and function of the cell.
The nucleus is enclosed by a double membrane known as the nuclear envelope that assists in regulating the transport of materials, like ions and molecules, in and out of the nucleus through nuclear pores. Inside the nucleus, the semi-solid fluid is known as nucleoplasm, where we find the chromatin and the nucleolus.
Interesting to note, not all cells contain a nucleus. Some cells, such as mammalian red blood cells, do not contain nuclei. In contrast, muscle cells might contain more than one nucleus, a condition known as multinucleated.
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Which of the biogeochemical cycles include long term and short term cycles
The phosphorus cycle
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Take your time to answer this!! I'll be waiting!! (98 Points) ~Biology~
Suppose that you found a vertebrate fossil and brought it to an expert. The expert showed you that the joint structure of the fossil was similar to the joint structure of a modern squirrel. Infer the kinds of movements for which the animal had been adapted. Explain your inferences in a paragraph.
As we know before in back in time. Animals will adapt to their environment that their ancestors didn't have. This animal must have used to have a straight legs but then adapted since it couldn't really move. Then over time it most have started to bend so that way it could move faster. I think that it must have had straight legs because most animals aren't originally the same like humans have tailbones and tails or six fingers. I also feel that it was a analogous structure. Because the squirrel and vertebrate fossil had the similar appearance but are not evolved together and don't have a common ancestor.
(Hope this helps!)
Photosynthesis makes energy available to food chains true or false?
The folds in the brain that store memories are called the__________________
cerebrum
cerebellum
convolutions
corpus callosum
convolutions
explanation
The convolutions is basically consist of grooves called sulci and raised ridges in between called gyri . A convolution is a curvature of a surface. Picture a fully inflated beach ball. It has no convolutions - it is entirely convex. Now, take out some of the air, and fold the surface of the ball. Each place you make a valley in the surface, you make a convolution
The answer is Convolutions
ExplanationConvolutions are located in the cerebral cortex area of the brain. This area has a wrinkled surface , hence named as Convoluted part or convolution. Convolutions contain ridges and grooves. Deep portions or grooves are called sulci Whereas raised portions or ridges are called gyri. Basically gyri are the specific area of the brain where memories are stored.
Cellular respiration is different than breathing because?
A. It involves an exchange of oxygen and carbon dioxide
B. It involves a chemical reaction
C. It occurs in all living things
D. It releases carbon dioxide as a waste
Which of the following is true?
A. Around 1500AD, the human population began to reach carrying capacity.
B. Around 1500AD, the human population began to decrease.
C. Around 1500AD, the human population began to level off.
D.Around 1500AD, the human population began growing more rapidly.
How is energy associated with food stored?
a. potential energy in chemical form
b. kinetic energy in chemical form
c. potential energy in mechanical form
d. kinetic energy in mechanical form
Please select the best answer from the choices provided A B C D
Answer: a. potential energy in chemical form
Explanation:
The food is the source of chemical energy as there exists various chemicals in the food like proteins, fats, vitamins, carbohydrates and others. The chemical energy is converted into potential energy after the digestion of food. The potential energy is in the form of ATP (Adenosine triphosphate) which is released and stored when the chemical bonds present in the food breaks down.
Which choice regarding DNA replication is true? a mistake in Dna replication never occurs b A change in amino acid sequence is inherent in mistake in DNA replication c mistake in DNA replication are a mechanism evolutionary change d mistake in DNA replication are a direct respond to the organism's environmental cues
Mistakes in DNA replication can lead to mutations, which are a mechanism of evolutionary change. DNA replication is highly accurate, but when errors occur and are not corrected, they can result in a change in the amino acid sequence and be inherited if present in germ cells.
Explanation:Among the options provided regarding DNA replication, the true statement is that mistakes in DNA replication are a mechanism of evolutionary change. DNA replication is a highly accurate process, however, errors during replication do occur, albeit infrequently (approximately once for every 10 billion nucleotides). Although many mistakes are corrected by repair mechanisms, some uncorrected errors lead to mutations. These mutations can be passed on to offspring if they occur in germ cells, such as sperm or eggs, and they can result in a change in the amino acid sequence of proteins. This process is one of the drivers of evolutionary change, allowing populations to adapt over time to new environments and conditions.
The Golgi apparatus helps to maintain cellular homeostasis by ____
Question 13 options:
A. controlling which proteins are synthesized during the cell cycle.
B. transforming absorbed light energy to manufacture carbohydrates.
C. synthesizing ATP molecules from glucose during glycolysis.
D. modifying, sorting, and packaging proteins prior to transport.
The right answer is D. modifying, sorting, and packaging proteins prior to transport.
The Golgi apparatus is one of the organelles necessary for the production of functional proteins.
The Golgi apparatus is a eukaryotic cellular organelle.
The Golgi apparatus is a transit and reservoir for proteins and lipids made in the endoplasmic reticulum. This is part of the network of internal membranes that have put in place to transport macromolecules.
In particular, it makes it possible to add post-translational modifications to the newly synthesized proteins.
PLEASE HELP
Fill in the blanks to complete each statement about the age of Earth.
According to scientific evidence, Earth is approximately 4.6 ______ years old.
Scientists used ______ dating to determine Earth’s age.
Answer:
4.6 billion years old
Radioactive dating
Explanation:
The age of the earth is 4.6 billion years and scientist used radioactive dating to determine the Earth’s age.
Radioactive dating:
It is a technique by which the age of the old rocks and fossils are determine. Radioactive substance decays with time.
Since, radioactive substances are present every where. So, the scientist utilize this property to determine the age of the Earth.
Therefore, the age of the earth is 4.6 billion years and scientist used radioactive dating to determine the Earth’s age.
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Which of the following is an example of an indirect observation?
counting the number of bald eagles that land near a river
counting rings on a tree stump to determine its age
using tools such as a thermometer or rain gauge to take measurements
using a live video to observe nesting owls
Answer:
An example of indirect observation is: Using a live video to observe nesting owls.
Explanation:
Indirect observation is the way we can analyze the behavior of a specific subject by the means of recorded video, narration or register of the natural environment of the subject. It could be in the form of written text, video, audio, or even a presentation. However, they have to reflect the specific scenario and behavior of the subject. They can't be manipulated all has to be presented as the original event.
EXTRA CREDIT (3 points): Explain what is happening in this cartoon.
its oxygen and carbon getting out of the teeth and the salt kills the non evolved germs which is in your teeth i think
During the process of meiosis, chromosomes replicate
A) once, during interphase I.
B) once, during interphase II.
C) twice, during prophase I and II.
Eliminate
D) twice, during interphase I and II.
Answer: A) once, during interphase I
Explanation:
Meiosis is a form of eukaryotic cell division which results in four daughter cells, each of which has half the number of chromosomes as their parent cell.
There are two major phases that a cell goes through during meiosis. About 80% of of the total cell division is interphase.
Its during interphase 1 that the cell replicates its chromosomes, where each of the chromosome has a couple of sister chromatids.
Also, the chromosomes replicate only once.
The correct answer is option A. During the process of meiosis, chromosomes replicate
once, during interphase I.
Explanation:In meiosis division, daughter cells contain half the number of parent chromosomes.So they just replicate once. And also replication is done in interphase I.What does the force of attraction in an ionic bond hold together?
A oppositely charged ions
B negative electrons
C neutrons and protons
D polar molecules
Why does
culture establish the standard by which quality of life is measured
Answer:
Culture establishes the framework in which individuls judge their environment.
Explanation:
Quality of life is the concept sorrounding all aspects of a persons life and focus on that person's needs as well as the way they are satisfied in its environment. But there is a bias in it, because while a person living in a country that offers it a lower standard of living can perceive it has the best quality of life without universal healthcare, free access to education, and a big market of employment. That person can believe that it has the best quality of life. Even though are countries with better standard of living. So, quality of life is a subjective cultural construction built by a society perception. That becomes objective and universal when is compared to different countries.
An aqueous solution of carbohydrates, proteins, lipids, nucleic acids, and inorganic salts surrounded by a cell membrane is called
The aqueous solution of carbohydrates, proteins, lipids, nucleic acids, and inorganic salts surrounded by a cell membrane is called the cytoplasm. The cytoplasm primarily comprises of water, and hosts a range of macromolecules and ions which participate in various metabolic reactions.
Explanation:An aqueous solution of carbohydrates, proteins, lipids, nucleic acids, and inorganic salts surrounded by a cell membrane is called the cytoplasm. The cytoplasm consists of 70 to 80 percent water, making it capable of hosting a variety of life's chemical reactions. Cytoplasm contains various organic molecules and ions, including glucose and other simple sugars, polysaccharides, amino acids, nucleic acids, fatty acids, and derivatives of glycerol as well as ions like sodium, potassium, and calcium. Additionally, carbohydrates are found on the exterior surface of cells, attached to proteins or lipids, reflecting the complexity of the cell's makeup.
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! The question is in the attached below, thank you for helping. Please so type random things or idk just to get pints . I will report you and your answer
The layer which protects from ultraviolet radiation is the _____.
thermosphere
ozonosphere
mesosphere
ionosphere
That is the ozone layer or "ozonosphere"
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which best describes the structure of the molecules that make up proteins?
Proteins are made up of monomer units connected together. These units are called amino acids. Each amino acid has a carbonyl group and an amine group. These two groups will link when the amino acids are added. Also, an amino acid has a specific R group that characterizes which type of amino acid it is.
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Proteins are made of amino acids with a basic structure having amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (which is different in each amino acids).
What are proteins?"Proteins are made up of repeating amino acids joined by a peptide bonds."These are the also known as building blocks of life.Proteins acts as hormones, enzymes and antibodies.It is found in all living organisms.What are amino acids?It is a structural and functional unit of proteins.Enzymes can break proteins into amino acids.Each amino acids have a amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group. The organic R group is different in each amino acids.Hence, the structure of proteins are best describe if we know the structure of present amino acids.
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Which element would be considered a trace element?
A) Carbon
B)
Hydrogen
C)
Iron
D)
Nitrogen
Your answer is C if its asking for trace in the human body and if its asking for normal trace such as (DNA) it would be A .
Brainiest Please?
The option C is correct. Iron is a trace element.
Explanation:Trace elements are elements which are required in small amounts but they are essential to the body.
Carbon and hydrogen are needed in abundant amount because it is present in all organic compounds like sugars, and lipids.
Nitrogen is part of amino acids, building blocks of proteins.
Iron is essential only for some enzymes and hemoglobin. And it can also be recycled in the body.
In ferns the spores develop on A. the tip of the gametophyte. B. the underside of the gametophyte. C. the roots of the gametophyte. D. the underside of the sporophyte.
Answer:
The correct answer is option D-the underside of the sporophyte.
Explanation:
Ferns are pteridophytes which evolved earlier than the flowering plants. They do not produce seeds and reproduce through spores.
These spores are usually present on the underside of fern leaf also called "fronds" in sporophytic structures called sori. When these spores are ripened they are released from the capsule which germinates to produce prothallus, a gametophyte from which gametes are produced.
Thus, option D-the underside of the sporophyte is the correct option.
Why would a more diverse habitat be more resilient (able to survive) disease, flooding, and invasion?
Answer:
Biodiversity is defined as the diversity or variance found among the organisms living on Earth. It can be seen at various levels such as genetic level, spices level and ecosystem levels.
Biodiversity in an ecosystem increases its productivity, makes it more resilient and maintains the health of the ecosystem.
Increased diversity makes an ecosystem more resilient by following ways:
Averaging effectsNegative covariance effectsInsurance effectResistance to invasionResistance to diseaseWhen animals of the same species interact with each other
When animals of the same species interact with each other they are called as intra specific interactions.
They produce the same species and compete for the limited resources available to them.
Most enzymes fall into which group?
A. isomerases
B. hydrolases
C. lyases
D. transferases
Lyase enzymes is the enzyme class with the most enzymes since it contains more types of reactions, etc.
Hope it helped,
BioTeacher101
30 Points 4 Questions Marine Science
1. All of the following are true of surface currents except
a. influenced by wind
b. exist in large lakes
c. are found in the top 1,300 feet of the ocean
d. have the same movement as thermohaline currents
2. A water molecule's shape resembles which of the following?
a. oval
b. circle
c. square
d. triangle
3. Much of the earth's heat is retained in the
a. crust
b. wind
c. oceans
d. mountains
4. Most hurricanes will originate
a. near the North Pole
b. in the equatorial region
c. when the water and air are cold
d. below the ocean's surface current
Option D is correct.
d. have the same movement as thermohaline currents
Explanation:The movement of the surface water of the ocean due to the certain pattern of wind and Coriolis Effect and earth spin creates surface currents. That are influenced by all of the above three except the fourth one.
Answer 2:Option D is correct.
d. triangle
Explanation:Water molecules are not linear in shape. Oxygen has 8 electrons in its valence shell so there are two bonding pairs in water and two lone pairs. Lone pairs strongly repel each and water molecules get bent shape due to this.
Answer 3:Option C is correct.
c. oceans
Explanation:We just do not know that how much heat is captured in the oceans. Most of the heat dissipates in the atmosphere is absorbed in the oceans. So, most of the heat is retained in oceans.
Answer 4:Option B is correct.
b. in the equatorial region
Explanation:Hurricanes begin as the warms storms in tropical regions of due to the warm moist water of Atlantic and Pacific Oceans near the equator. So the correct option is B.
The odd statement is b. exist in large lakes
Explanation:Surface currents are generated largely by wind. Their patterns are determined by wind direction,Earth's rotation, and the position of landforms that interact with them. Currents may also be generated by density differences in water masses caused by temperature and salinity variations but they are not present in the form of lakes
The shape of H2O molecule is oval
Explanation:It is not completely oval but irregular A molecule of water has an angular or bent shape. The H-O-H bond angle in a molecule of water is 104.5o, an angle that is also quite close to the 109.5o bond angles of methane so we can say that it is a little bit oval plus triangular too.
Much of the earth's heat is retained in the oceans
Explanation:Earth retains its temperature in water cycle and we know that water cycle is mostly dependent upon the ocean. Although winds are also responsible but mostly it is retained by oceans. Similarly the constant exchange of energy between the Earth's surface and the greenhouse gases is what enables the planet to maintain its average temperature of 15 degrees Celsius.
Most hurricanes will originate in the equatorial region
Explanation:A hurricane needs the warm water of the tropics, which feeds a storm with energy, in order to form. Most of them are originated in the African continent and that is why we can say that they originate from the equatorial region because much part of Africa lies in equator.
Weasels eat arctic hares. Which is type the predator
Which word identifies the agent that carries the energy released from earthquakes? Epicenter focus lithosphere waves
The correct answer is - waves.
When there's an earthquake, it means that there's a big shock deep inside the ground where a large amount of energy is released, This energy, since it is inside of the Earth, is transferred through the crust in the shape of waves, or rather, seismic waves. The bigger the stress inside the Earth, the more intense the seismic waves, and vice versa, the lesser the stress, the lesser the intensity of the waves. There's special scales that are measuring the frequencies of this waves, and some of the most popular in usage are the Richter scale, and the Mercalli scale.
How is the nitrogen cycle important to humans?
A. It produces free nitrogen that humans can breathe.
B. It converts nitrogen into a form that humans can obtain by eating other organisms.
C. It produces nitrogen compounds that humans can breathe.
D. It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
B.
Nitrogen is a very important element to all living organisms, and the nitrogen cycle provides nitrogen in a form usable by humans, which is obtained by eating other animals.
Hope it helped,
BioTeacher101
Nitrogen cycle is important to humans because it converts nitrogen into a form that humans can obtain by eating other organisms.
NITROGEN CYCLE:
Nitrogen cycle involves the manner by which nitrogen is recycled in the environment i.e. from the soil to the atmosphere and vice versa. Nitrogen is fixed by bacteria present in the root nodules of leguminous plants. The plants absorb nitrogen in form of nitrates. Human beings benefit from this process when they feed on organisms like plants that have converted nitrogen to a usable form. Therefore, nitrogen cycle is important to humans because it converts nitrogen into a form that humans can obtain by eating other organisms.Learn more at: https://brainly.com/question/23603107?referrer=searchResults
The food pyramid is an example of science _______ influencing society.
The answer should be positively because eating is good....if not I'm super sorry. its a 50/50 chance lol
Answer:
The food pyramid is an example of science positively influencing society.
Explanation:
We consider something as a positive influence, when it results in improvements for society and citizens as a whole. In this case, we can say that the food pyramid is an example of science that positively influences society. This is because the food pyramid informs how people should eat healthily, without excesses and supplying all the needs of their body, leaving the population more healthy and nourished.