Answer:
Yes it would be B.) fossil evidence
Explanation:
It was found that there was similar type of genetic characteristics of animals living in different parts of the world. So therefore it would be fossil evidence. Have a nice day!
What structures on the ventral side of the planaria propel it forward?
Cilia are the structures on the ventral side of the planaria that propel it forward.
Planaria is a type of flatworm that belongs to the class Turbellaria. Some species of planaria are terrestrial, while some are aquatic. Planarians have a soft and ciliated body. Cilia are hair like organelles situated on the ventral dermis of the planarians. Cilia function for locomotion by propelling the planarians forward, and allowing them to move smoothly on a layer of mucus.
Living organisms all have dna and rna which are botha. Carbohydratesb. Lipidsc. Proteinsd. Nucleic acids
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Imagine an ecosystem with the following populations.
Level of Food Chain Types of Organisms
1.Producers
berry bushes
fruit trees
oak trees
maple trees
2.Primary Consumers
rabbits
mice
squirrels
crickets
ants
grasshoppers
3.Secondary Consumers
foxes
owls
Final answer:
The ecosystem described includes producers like trees and bushes, primary consumers such as rabbits and insects, and secondary consumers including foxes and owls, showcasing the transfer of energy through food chains from the sun to herbivores and carnivores.
Explanation:
Understanding the Ecosystem Food Chain
The ecosystem described involves a hierarchy of organisms from producers to consumers defining their relationships in a food chain. At the base, producers like berry bushes, fruit trees, oak trees, and maple trees capture sunlight to produce energy. These producers are consumed by primary consumers, including rabbits, mice, squirrels, crickets, ants, and grasshoppers, which are herbivores feeding on plants. Moving up the chain, secondary consumers such as foxes and owls, are carnivores that predate on the primary consumers.
In this structured ecosystem, each level of the food chain depends on the organisms below it for energy. Producers harness energy from the sun, primary consumers feed on this generated biomass, and secondary consumers feed on primary consumers. This energy flow demonstrates a basic but crucial ecological concept: the transfer of energy from the sun through various trophic levels up to carnivores.
The described system is a simplified presentation of a complex food web where multiple predators and prey interactions can exist. In the real world, organisms often consume from different trophic levels, making the food web an intricate network of energy transfer contributing to the ecosystem's stability and sustainability.
During respiration, a seed metabolizes sugars. what is the source of the sugar metabolized by the seed?
The source of the sugar metabolized by the seed is photosynthesis.
The procedure used by plants to transform light energy into a chemical form of energy is known as photosynthesis. The chemical energy can afterward be discharged to fuel the plants to perform their activities.
During photosynthesis, carbon dioxide and water can be combined in the existence of chlorophyll and sunlight to generate oxygen and glucose (carbohydrates). However, the prime component generated in the procedure is glucose (sugar) that is the molecule, which generates energy to mediate the activities of the cell.
The source of sugar metabolized by the seed during respiration is the stored carbohydrates in seeds and bulbs, which are converted into simple sugars like sucrose. Once the seed starts growing, the plant can produce its own food through photosynthesis.
Explanation:The source of the sugar metabolized by the seed during respiration is the carbohydrates stored in seeds and bulbs. These carbohydrates, such as starch, are converted into simple sugars like sucrose through metabolic processes. Once the seed starts germinating and new shoots and leaves grow, the plant can produce its own food through photosynthesis.
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What best describes psychology as a science?
Psychology is the study of our brain and therefore our actions and behaviour.
Since we study our brain concretely speaking, we are studying humans. And when we study something about the universe, we're studying science.
Hope it helped,
BioTeacher101
You study the mind and what goes on in your mind. Which relates to science because you are studying and stating a hypothesis before and see if you can make things better for said situation.
Which structures are found in plant cells, but not in animal cells? Check all that apply. Cell wall cell membrane chloroplasts lysosomes ribosomes vacuole
The answers would be
Cell Wall
and
Chloroplasts
The structures that are found in plant cells but not in animal cells are:
Cell wall andChloroplastsThe plant cell contains few structures not found in animal cells. The most prominent are:
Cell wall: This gives the plant is definite shape. It is secreted by the cytoplasm and is composed of cellulose. The cell wall is fibrous and has a high tensile strength.Chloroplasts: Since the plants make their own food by photosynthesis, the chlorophyll found in the chloroplasts play a unique role in that process.The lysosomes, ribosomes, vacuole and cell membrane are all found in both plant and animal cells.
Therefore the structures that are found in plant cells but not in animal cells are the cell wall and chloroplasts.
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What molecule is represented by the molecular model shown below?
A} Glucose
B} Adenosine triphosphate (ATP)
C} Adenosine diphosphate (ADP)
D} Starch
Nvm its ATP
Answer:
The correct answer is C) Adenosine Diphosphate (ADP)
Explanation:
Examples of pure substances are elements and _________.
mixtures
compounds
2.
Iron and aluminum are examples of _____________.
pure substances
compounds
3.
A ____________ is a physical combination of things that can be separated.
mixture
compound
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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RNA primase synthesizes RNA primer that attaches itself at the initiation point of replication. RNA primer constructed during DNA replication needs to be replaced because RNA differs from DNA. It contains ______ instead of ______.
Options for 1: adenine, cytosine, uracil
Options for 2: adenine, guanine, thymine
The answer is; Uracil, Thiamine
The two different structurally, with thymine having a methyl group in its ring structure which uracil lacks. DNA does not have uracil because Cytosine can be tautamerized and deaminate to produce uracil. Uracil is recognized by repair enzyme of DNA, nicked and replaced by cytosine. If uracil were a component of DNA, the repair systems would not be able to distinguish original uracil from uracil originated by deamination of cytosine. Thymine is more stable than uracil, a requirement for DNA which stores critical cell information.
Which of the following statements about enzymes is true?
A. High temperatures can cause enzymes to denature which negatively affects the shape of the active site
B. Extremes in pH can cause enzymes to denature which negatively affects the shape pf the active site
C. Increasing the concentration of a substrate will increase the reaction rate of an enzyme reaction
D. All of the above
E. None of the above
The equator is a line of latitude true or flase
Which type of protein penetrates tot he interior of the plasma membrane but does not extend all the way through it
The answer is Integral. :) Hope this helps!
What types of boundaries create volcanoes?
convergent boundry (subduction zone)
hope this helps! ❤ from peachimin
Convergent Boundary is the answer
Explain why the presence of large amounts of organic matter alone does not results in fertile soil
There's more to it than just large amounts of biomass to the creation of fertile soil because there's multiple factors that determine what will happen to that biomass and how it will affect the soil.
We can take the temperature, precipitation, and gradient of fall as examples.
The temperature is very important, if its high the decomposition of the biomass will be quick, and if it's very low the decomposition may take years to be completed and the soil to get the benefits of it. But, even if the temperature is high, if there isn't enough precipitation, than the decomposition will not have any real effect on the soil and the soil will be sandy.
The precipitation is very important because it helps in the decomposition and for getting the nutrients deeper into the soil, so the bigger the amount of it, the better. But if the temperature is relatively low, than it will be a pretty slow process, and the soil will not get the full benefit of it.
The gradient of the fall, as a physical feature is very important because if the gradient is too big, than the biomass will gradually just get downwards with any wind and rain, and the slopes will not see, pretty much, anything from it. On the other hand, if the gradient of the fall is very low, than the biomass will be more stable on the ground, and its movement will be restricted, so the soil will benefit more, depending of course on the other factors as well.
The presence of large amounts of organic matter alone does not result in fertile soil because there needs to be a balance of both organic matter and nutrients in the soil to make it fertile.
Nutrition n brain helpppp
What substances in our diet are used to make up the myelin of our neurons?
Is omega-3 so good for mental health because it participates in this process?
thanks <3
The substances in our diet that make up myelin are avocados, fish, nuts, whole grains and any food rich in Vitamin B-1 and B-12. Omega-3 is good for mental health because it improves memory and removes all the symptoms of depression and can get you out of it. It also helps people who have mental illnesses.
Why is it important that the phospholipid bilayer be both hydrophobic and hydrophilic?
A) They are not important
B) They maintain balance in the cell
C) To allow cellular bonding
It is important that the phospholipid bilayer is both hydrophobic in the surface and hydrophilic inside to control and manage the incoming organic compounds mainly water from exceeding the needed amount or destablizing the concentration established by the cells.
Hydrophilic is a characteristic of an object which is attracted to water or can synthesize with water. In contrast to hydrophobic like fats, oils and lipis which has a strong aversion and dislike to water molecules.
Transmembrane proteins are found in the plasma membrane. Hydrophilicregions are embedded within the membrane, and Hydrophobic regions project from both surfaces of the bilayer.
Approximately 20-80% of the cell membrane is composed of lipids, the rest, is made up of protein. The lipid layer of the membrane gives it flexible and permeable characteristic. While the protein part assists in transport of molecules it needs to survive.
What controls all the other glands? thyroid gland pancreas pituitary gland endorphins
Answer:
Pituitary Gland
Explanation:
The pituitary gland is the crucial gland of endocrine system and is located in the lower side of brain just behind the nose. This gland secrete hormones directly into the blood. The hormones secreted by pituitary affects the reproductive organ, adrenal gland and more specifically thyroid gland.
The gland regulate endocrine secretions by pancreas. The endorphins are certain chemicals helps in the reduction of pain.
The stethoscope is a device commonly used by doctors to monitor heart function. When listening to a heart beating using a stethoscope, the doctor hears the characteristic "lub-dub" sounds. The lub sound represents the (1)____ of the atrioventricular valves and the dub sound represents the closure of the valves between (2)____.
1. closing or opening
2. the arteries and atria, the ventricles and arteries, or the atria and ventricles
Doctors can also use stethoscopes to monitor respiratory function. A wheezing or whistling sound most likely indicates (3)____
3. blocked sinuses, an inactive diaphragm, or a constricted trachea
Answer:
The correct answers are:
1. closing
2. the ventricles and arteries,
3. a constricted trachea
Lub is the first sound of a heartbeat and is mentioned as S1. It is usually produced due to the closing of tricuspid and and mitral or bicuspid valves present between atria and ventricles.
Tricupsid is located between atrium and ventricle of the right hand side and mitral valve is located between atrium and ventricle of the left hand side. They prevent the back flow of blood from ventricles to their respective atria.
Dub, being the second sound is written as S2. It is produced due to the closing of pulmonary (located between right ventricle and pulmonary artery) and aortic valves (located between left artery and aorta).
These valves prevent the back flow of blood from arteries into the ventricles.
The time between the two sounds is often taken as the measure of the diastole i.e. ventricular filling.
Wheezing refers to a high-pitched sound produced when a person breathes, especially during exhale. It is caused by constriction of the airways or inflammation. It is considered as a symptom of various diseases such as asthma, COPD, allergies, bronchitis etc.
In listening to the heart using a stethoscope, 'lub' represents closing of the atrioventricular valves and 'dub' represents closing of the valves between the ventricles and arteries. Wheezing or whistling sounds when monitoring the respiratory system likely indicate a constricted trachea.
Explanation:In listening to a heart using a stethoscope, the 'lub' sound represents the closing (1) of the atrioventricular valves. These valves separate the upper chambers, the atria, from the lower chambers, the ventricles. This closing of the valves prevents blood from flowing backward into the atria while the ventricles contract. The 'dub' sound signifies the closure of the semilunar valves, which are located between the ventricles and arteries (2). These valves prevent backflow of blood into the ventricles after the heart contracts.
Regarding the respiratory system, when using a stethoscope, a whistling or wheezing sound often signifies a constricted trachea (3). This condition may be caused by a variety of issues such as asthma, bronchitis, or other respiratory disorders.
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In humans, three weeks after conception a structure known as the _____ forms that will continue to develop into the central nervous system.
The answer is a neural tube.
If a small motor does 520 J of work to move a toy car 260 m, what force does it exert
[tex]Work done = Force\times distance[/tex]
From the question,
work done is 520 J
Distance is 260 m
This implies that,
[tex]520 =F\times260[/tex]
[tex]F=\frac{520}{260}[/tex]
[tex]F=2N[/tex]
Hence the motor exerts a force of 2N .
The force exerted by the motor is 2 N.
The work done by the small motor can be calculated using the formula below.
⇒ Formula:
W = Fd................ Equation 1⇒ Where:
W = Work done by the small motorF = Force exerted by the motord = Distance moved by the motor.
⇒ Make F the subject of the equation
F = W/d................ Equation 2From the question,
⇒ Given:
W = 520 Jd = 260 m⇒ Substitute these values into equation 2
F = 520/260F = 2 NHence, The force exerted by the motor is 2 N.
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in the 1960s new evidence help support the theory of continental drift and change into the theory of plate tectonics why was this new evidence
Which term is used for the group of proteins that are catalysts for metabolic reactions?
A.) carbohydrates
B.) vitamins
C.) nucleic acids
D.) enzymes
Answer:
The correct answer is option D.) enzymes.
Explanation:
Hello!
Let's solve this!
Catalysts are molecules that have the quality of accelerating reactions.
Let's analyze each of the options:
A.) carbohydrates: they are not molecules that accelerate reactions.
B.) vitamins: they are nutrients, they do not accelerate reactions.
C.) nucleic acids: do not accelerate reactions.
D.) enzymes: they are proteins that accelerate reactions, they are called biological catalysts.
After the analysis we conclude that the correct answer is option D.) enzymes.
Enzymes (D) are the group of proteins that serve as catalysts for metabolic reactions. They accelerate chemical reactions in a cell without being consumed or permanently changed.
Explanation:The term used for the group of proteins that act as catalysts for metabolic reactions is known as enzymes. Enzymes are biocatalysts that speed up the chemical reactions in a cell without being used up or altered permanently in the process. They play a crucial role in breaking down food into molecules that the body can use. Their function as catalysts enables them to maintain life by regulating the rate at which reactions occur, sustains life.
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Mycorrhiza from a relationship between fungi and which part of vascular plants
The roots.
Hope this helps!
-Payshence
What lines of evidence lend support to the theory that rna had a central role in the origin of life
The fact that ribosomes are ribosomes—the catalytic site is made of RNA, whereas proteins play a minor structural and auxiliary functional role—supports the RNA world concept. This was supported by the 2001 discovery of the ribosome's three-dimensional structure.
What is RNA ?All living cells contain ribonucleic acid (abbreviated RNA), a nucleic acid with properties comparable to those of DNA. However, RNA is often single-stranded, unlike DNA. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of alternating phosphate groups and the sugar ribose.
According to this theory, RNA served as a genetic information storage system and a catalyst for chemical reactions in early organisms. DNA didn't become the dominant genetic component until much later in the evolutionary process, and proteins took over as the primary catalyst and structural element of cells.
The RNA World theory would be supported by experimental data demonstrating that a completely self-replicating RNA polymerase ribozyme could be produced in a lab.
Thus, The fact that ribosomes are ribosomes the catalytic site is made of RNA, whereas proteins play a minor structural and auxiliary functional role.
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Carbohydrate: what elements do you expect to find in a carbohydrate?
A carbohydrate would be expected to contain the elements carbon, hydrogen, and oxygen. The ratio is generally 1 Carbon: 2 Hydrogen: 1 Oxygen. Examples are glucose and fructose.
In a carbohydrate, you would expect to find the elements carbon (C), hydrogen (H), and oxygen (O). The word carbohydrate literally means 'hydrated carbon'. The general empirical formula for a carbohydrate is CH2O. This means for every carbon atom, there are two hydrogen atoms and one oxygen atom. Examples include glucose (C6H12O6) and fructose (C6H12O6). Therefore, carbohydrates are composed of these three essential elements.
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Give one real life example of an enzymatic reaction in the human body.
Answer:
Enzymes are the bio-catalyst produced by the body.
They increases the rate of bio-chemicals reaction taking inside the body.
They form enzyme-substrate complex in order to increase the rate of the reaction.
They are highly specific in nature.
Example: Hexokinase catalyses the conversion of glucose to glucose-6-phosphate. Salivary amylase catalyses the breakdown of starch into maltose (simpler sachharides).Protein kinase is an enzyme used to activate or deactivate other by adding phosphate group to them.What is carried to the body cells by blood? (more than one)
A. Salts
B. Nutrients
C. Oxygen
D. Nitrogen
which of the following best explains why what we know about cells is called a theory and not a law?
The correct answer should be A) Cell theory explains cell behavior where a law would describe it
Theories are used to explain phenomena, while laws just describe what will always happen. Such as the law of thermodynamics that describes what is going on inside a room when heat leaves it.
He is correct!! yuuuuuuup
in order to make new nucleic acids your body needs food that contains carbon, hydrogen, and oxygen as well as
A) sodium & chlorine
B) acids & bases
C) potassium & calcium
D) nitrogen & phosphorus
The correct answer is option D, that is, nitrogen and phosphorus.
Nucleic acids refer to the macromolecules comprising oxygen, hydrogen, phosphorus, and carbon. They are the small biomolecules or the biopolymers, playing an essential role in all the known forms of life.
They comprise nucleotides that are the monomers formed of three constituents, that is, a 5-carbon sugar, a nitrogenous base, and a phosphate group. If the sugar is obtained from ribose as deoxyribose, then the polymer is DNA, and if the sugar is a compound ribose, then the polymer is RNA.
In an ecosystem, organisms compete for different resources. Intraspecific competition occurs when there’s competition for resources between members of the same species. What do you think the word interspecific refers to? Give an example with your explanation.
Intraspecific competition is when members of the same species compete for resources.
Using this definition, we know that:
1) competition is "compete", which is the latter half of the answer.
this leaves Intraspecific's definition in the beginning half of the answer
Intraspecific means "[something] existing within a species or individuals"
hope this helps
Hi!
In an ecosystem, organisms compete for different resources. Intraspecific competition occurs when there’s competition for resources between members of the same species. What do you think the word interspecific refers to? Give an example with your explanation.
Answer:
The word intraspecific means that the same kind of an organism competes for something!