heart, brain, skin are the group contains only organs in a human body. Thus option A is correct.
what is role of heart ?
The major function of heart in our body is to pumping blood from the lungs to different the body parts.
In the initial step the de-oxygenated blood collected in the right atrium and pumped to the lungs via the right ventricle through a valve called tricuspid valve.
After carbon dioxide exhalation, the pure re-oxygenated blood is collected in the left atrium moved to the left ventricle via the mitral valve then transfers to the body parts.
The transportation of blood from the right atrium to the right ventricle occurs via the pulmonary semilunar valve.
Now the pulmonary vein carries the oxygenated blood and reach the left atrium transported to left ventricle followed by aortic semilunar valve transports this blood from the left ventricle to the aorta then to capillaries.
Thus option A is correct.
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A food change is an ecosystem flows from green algae, to freshwater snails, to small fish, and finally to large fish. Which organism is the primary consumer?
Large Fish
Small Fish
Green Algae
Freshwater Snails
Answer:
The correct answer is - freshwater snails.
Explanation:
Producers are organisms that produce their own food and not depends on any other organism by the process of photosynthesis such as algae. Primary organisms on the other hand directly depend on the producers for their food and often gt killed by secondary consumers.
Freshwater snails are the perfect example of the primary consumer as they get their food and energy from algae and are the primary source of food and energy for small fishes.
In most cases What happens to a liquid when it cools
Answer:
it evolve heat to surrounding
Answer:
Density Increases, its Mass Decreases, Its Volume Increases.
Explanation:
please help me, and be quick
Independent variable is mass of the bob
Dependent variable is period
Control is amplitude
B В
4. Which of the following characterizes an ionic bond? (1 point)
The electrons in the bond are shared between two atoms.
The electrons in the bond are shared between two ions.
The bond results from the attractive forces of two similar charges.
The bond results from the attractive forces of two opposite charges.
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Answer:
The bond from the attractive forces of two opposite charges
Explanation:
Ionic bond-A bond that is formed when electrons are lost or gained by the atoms in the compound...the opposite charges attract to one another forming the ionic bond.
What compound is this?
Carbohydrates
Lipids
Nucleic Acids
Proteins
I will give u brainliest if u are right Which statement describes a question that can be answered by a scientific
investigation?
A. It is a question that can be answered by gathering data during an
experiment.
B. It is a question that can be answered by gathering other scientists'
opinions.
O C. It is a question about a phenomenon of which no measurements
can be taken
D. It is a question about the sequence of experimental steps.
SUBMIT
Answer:
A.
Explanation:
This is true because scientific investigation is that of experimenting and collecting data to create an analysis and conclusion. The only way to answer a question with scientific investigation is by gathering data during and experiment. A scientist's opinion is not data, but a thought that is not solid and can change. It is not always backed up by facts. Measurements must be taken when you answer a scientific question with data. This is why A is the correct answer. hope this helped
What compound is this?
Carbohydrates
Lipids
Nucleic acids
Proteins
Answer:
Nucleic acids.
Explanation:
Extremely helpful Bio mnemonics to remember are:
Carbohydrates & Lipids - CHO
Proteins - CHON
Nucleic acids - CHONP
Because of the "CHONP" mnemonic, I was immediately able to recognize the compound as a nucleic acid after seeing the "P", which represents phosphorous.
Carbohydrates, lipids, nor proteins will include "P"; only nucleic acids.
Please check your answer before you answer that it is my exam and my last chance.
Biology
Answer:
C
Explanation:
just trust me
oh sue me if I'm wrong
Which of the following statements best describes the function of a cell membrane?
( WILL MARK BRAINLIEST ) Please help ASAP
A. The cell membrane has many functions, but its primary action is to regulate the movement of materials into and out of the cell
B. The cell membrane has numerous functions, but its primary role is to keep organelles contained within the cell
C. The cell membrane has many functions, but its primary action is to act as a barrier to keep foreign substances from moving into the cell
D. The cell membrane's primary function is to move waste out of the cell
The correct answer as to which best describes the function of a cell membrane would be that the cell membrane has many functions, but its primary action is to regulate the movement of materials into and out of the cell. The correct option would be A.
The cell membrane primarily delimits the cell and act as an interface between the inner content of the cell and its surrounding.
The cell membrane is selectively permeable. Thus, it regulates the movement of materials between the cell's matrix and the surrounding.
Other functions of the cell membrane include:
By regulating the movement of materials in and out of the cell, the cell membrane ensures that the optimal range of concentration of substances is maintained within the cell. In other words, it maintains homeostasis.By surrounding the cell, the plasma membrane becomes the first line of contact for anything that might want to harm the cell. Hence, it serves protective functions.By selectively allowing and influencing some materials to move out or inside the cell, the cell membrane plays an integral role in the transportation of materials.
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Gastrin secretion in response to elevated ph within the stomach is an example of:__________.
Answer:
It is an example of enzyme activation through the pH of the environment surrounding the enzyme.
This phenomenon is called proenzyme, proenzymes are inactive enzymes that, due to chemical changes in the environment that vary, are activated or not depending on these.
Explanation:
Proenzymes, generally the best known or named, are found in the digestive system, where the sequential digestion of food is essential, with an order, and the enzymes must be controlled or activated at certain moments of digestion.
Proenzymes can be activated by the presence of chemicals, pH acids and even pH alkalinity, the change of the medium is what gives the enzyme permission to start with its reaction effect.
Usually this happens with enzymes that must be controlled, and that their activity must be in certain periods so as not to generate pathologies or even destroy a tissue of the organism.
membrane refers to-
a. cells of different sizes.
b. organisms that consist of only one cell.
c. a thin, soft, pliable sheet or layer.
d. large, efficient cells.
please help
Answer:
c
Explanation:
the membrane is the outside layer of the cell
Is the following statement a fact, opinion or theory? Why?
Scrambled eggs are better for breakfast than cereal. I can stay full longer if I eat eggs.
Answer:
theory
Explanation:
the second sentence on the statement adds an observation that isn´t an opinion. if the full statement was only the first sentence, it would be an opinion.
Answer Please, Thank You ! ❤️
Describe the structure of atoms and the characteristics of subatomic particles
Answer:
Atoms have three particles: protons, electrons, and neutrons. The nucleus contains protons and neutrons. The outside regions of the atom are called the electron shells and have electrons.
Explanation:
hopefully this helps you. :)
pls mark me brainlest ;)
Answer:
An atom is a tiny indivisible particle.It is made up of three subatomic particles named as electrons,protons and neutrons.Protons and neutrons are located inside the nucleus of an atom and electrons revolve around the nucleus in different energy levels or shells.
Protons are positively charged.Mass of protons is equal to the mass of electrons.Neutrons are neutral.Electrons are negatively charged.
Explanation:
Where do exotic species tend to cause the most problems?
Answer:
Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems.
Explanation:
Answer:
they tend to cause problems wherever they don't live. Or where they didn't originate.
Explanation:
If an exotic species is not in its natural habitat than it can cause and have many problems.
What conditions are needed to form organic molecules from inorganic molecules? (A: Abundance of oxygen and the ozone layer) (B: Active volcanoes and very cold temperatures) ( C: Presence of inorganic molecules with lightning and intense radiation) (D: Low levels of ultraviolet radiation and a specific mixture of gases).
Answer:
c
Explanation:
the theory suggest that formation of organic molecules takes places by the help of inorganic material along with lightening and intense radiation
Lightning and strong radiation in the presence of inorganic compounds. Thus option C is incorrect.
What is abiogenesis?Abiogenesis is the process of forming organic molecules from inorganic ones.
This is thought to be how the first organic compounds were formed around 3.8 billion years ago on early Earth. The classic Miller–Urey experiment from 1952 aimed to recreate the early earth's conditions. They used electric parks to simulate lightning strikes in a glass with greenhouse gases such as methane, which are thought to have been key parts of the early Earth's atmosphere. This experiment resulted in the formation of primitive organic compounds.
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What type of cell organelle is only found in animal cells? (1 point)
ribosomes
vacuole
cytoplasm
lysosomes
Answer:
lysosomes
Explanation:
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
Among the given options only lysosomes is found animal cells
Animal cells can be regarded as eukaryotic cells containing membrane-bound nucleus as well as other membrane-bound organelles. The organelles contained in this cell are there to carry out specific functions which the body needs for the normal functioning of the cell.Some of the organelles that can be found in the cell of animals are:nucleus
cytoplasm
nucleolus
mitochondria
Lysosome.
Ribosomes, vacuole and cytoplasm can as well be found in plant cell not only in animal cell.lysosome can be regarded as membrane-bound cell organelle which has some contains digestive enzymes in it, that helps in breaking down of excess as well as worn-out cell parts.Therefore, among the given options only lysosomes found animal cells
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fat around organs are?
Answer:
Visceral fat
Explanation:
it is fat that wraps around your abdominal organs deep inside your body
Scientific knowledge is both long lasting and always
Answer:
Changing
Explanation:
says it in the lesson
"Genetic power is far more potent than atomic power. And it will be in everyone's hands. It will be in kits for backyard gardeners. Experiments for schoolchildren. Cheap labs for terrorists and dictators. And that will force everyone to ask the same question—What should I do with my power?— which is the very question—science cannot answer."
Answer:
These facts are true and disturbing
Explanation:
Genetics is a discipline that has advanced incredibly in the last years. For example, by using the versatile CRISPR-Cas9 genome editing system, we are now able to insert literally any sequence into a given genome in vivo. The CRISPR-Cas9 is a technology that can be used in a regular molecular biology laboratory. It is expected this technique will enable in the near future to correct genetic disorders that have plagued mankind since times immemorial. However, genomic technologies like that could be used by malignant persons to hurt innocent people, thereby it is imperative that countries regulate their use.
Match the call structure with the best description. Each cell structure matches with exactly one description.
Answer:
Please find the cell structure with their best descriptions below
Explanation:
1. Capsule: Capsules are one of the Glycocalyx that firmly attaches to the cell surface and helps the cell avoid phagocytosis.
2. Slime layer: Slime layer is the other Glycocalyx that is loosely attached to the cell surface and helps the cell prevent dessication.
3. Flagella: The flagella is a long whip-like cell structure found in bacteria and some protists and principally used for moving.
4. Conjugation pilus: Conjugation pilus is a cell structure in bacteria that is used to transfer DNA to another bacteria cell.
5. Fimbriae: Fimbriae is a short, bristle-like protein that project from cell surface and help cells attach to surfaces of other cells.
6. Cell wall: Cell wall is a cellular structure found in plant cell and bacteria cells, whose function is to protect cells from harsh conditions and helps maintain cell shape.
7. Cell membrane: The cell membrane controls passage of substances into and out of the cell.
8. Cytoplasm: The cytoplasm is a gelatinous material found inside the cell.
9. Inclusions: Inclusions are structures in cells that formed from the deposits of nutrients.
10. Endospores: Endospores are structures that protect bacterial genome in a dormant state under adverse environmental condition.
11. Ribosomes: Ribosomes are organelles in a cell that makes polypeptide (protein).
12. Mycolic acid: Mycolic acid is a waxy molecule (long fatty acid chain) that is found in some gram positive bacteria and associated with their cell wall.
13. Nucleoid: A nucleoid is a region in prokaryotic cell where chromosomal DNA and DNA-associated proteins are concentrated.
14. Pili: Pili is similar to the Fimbriae but longer and contain less numerous protein appendages than fimbriae used in attachment.
sarah performs an experiment to determine the effect of nitrogen on plants. she studies the effect of nitrogen on the growth of the root hair, height of the plants, and nodule formation. which factor is an independent variable?
7. What did Samuel Morton study and what did he
conclude from his studies??
Answer: He supported polygeny through his work measuring human skull volumes. He measured modern and ancient skulls and concluded that the human race (or species) could be ranked on a scale of intelligence. He concluded that the ancient Egyptians were not African, but were Caucasian.
Which of the genotypes below would be heterozygous? Choose all that are.
Characteristics of asthma include:___________.a. Chronic inflammatory disorderb. Airway hyperresponsivenessc. Alveolar collapsed. Genetic susceptibilitye. Airway remodeling
Answer:
The correct answer is a.
Explanation:
Asthma is characterized by a chronic inflammatory process of the airways in which a variety of cells predominate, such as eosinophils, neutrophils, and mast cells. Chronic inflammation produces an increase in airway reactivity and recurrent episodes of wheezing, respiratory distress, intercostal pulling, coughing, and chest tightness, especially at night and in the morning. Asthma is a disease in which there is bronchial hyperresponsiveness, which is an exaggerated response of the bronchial mucosa and leads to bronchospasm and bronchitis.
Mitochondria have highly folded inner membrane that increase the membranes surface area for atp production. What concept does this illustrate?
1) a cell ability to maintain homeostasis is critical for life
2) catalysts speed up chemIcal reactions in cells
3) all livIng things are composed of cells
4) a cells structure is related to its function
Mitochondria have a highly folded inner membrane that increases the surface area for ATP production. This explains that a cell's structure is related to its function. So the correct answer is option 4.
What is the role of mitochondria in a cell?In an eukaryotic cell, the mitochondria are present and produce ATP through the Krebs cycle, the electron transport chain, and other cellular processes. The inner membrane of mitochondria is folded, and this membrane consists of many complexes that are required for the electron transport chain.
Due to the transfer of electrons, a proton gradient is formed that allows the formation of ATP. More complexes (ATP synthase) can fit into the membrane as it folds, and ATP production increases. To produce more energy, the mitochondria are made this way. Apart from this, other organs such as the intestine have villi that are highly folded to increase the rate of absorption.
Hence, the shape of each cell is related to its function. Option 4 is true for the statement.
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controlled variables.
Question: In the above example, which of the following would be
controlled variables?
A. The age of the walruses in the experiment
B. Whether or not you feed fish food to the walruses (some will get fish
food and some won't)
C. The size of the habitat that the walruses live in.
D. Both A and C
Is myosin a fibrous protein or a globular protein?
Answer:
Fibrous protein
Explanation:
The definition of myosin is "a fibrous protein that forms (together with actin) the contractile filaments of muscle cells and is also involved in motion in other types of cells."
PLEASE ANSWER!!!
What information can we learn from a scientific name that we cannot learn from a common name?
Kingdom and Species name
Genus and Species name
Species and Genus name
Order and Family name
Which is the first step in building a solar system from a solar nebula?
O A. An explosion disturbs the gas and dust in the nebula.
B. The nebula collapses.
C. Matter accumulates.
O D. Spinning matter increases in temperature.
Answer:
A) An explosion disturbs the gas and dust in the nebula.
Explanation:
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