The statement that describes the part of cell theory is: (A) The flow of energy occurs within cells.
The function that happens within the cytoplasm of a cell is (D) majority of metabolic activity.
Cell theory was put forward by Schleiden and Schwann. Its main formulations are that cell is the basic and structural unit of life, all cells arise from pre-existing cells and all the organism have one more more than one cell.
Cytoplasm is the gel-like liquid present inside the cell. It provides the medium for all the cell organelles to reside and perform their specific functions. Cytoplasm is the total fluid of the cell and the cell organelles, except the nucleus.
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Which is an example of a bioresource used to build a home?
A shingles for the roof of a house
B molten glass flattened into windows
C crushed rock for a gravel driveway
D lumber used to construct a house frame
The example of a bioresource used to build a home is as follows: lumber used to construct a house frame (option D).
What is a bioresource?A bioresource is any resource of biological origin i.e. that emanates from life.
This suggests that any material regarded as a bioresource must either be from a plant, animal or microbe etc.
According to this question, a lumber is a wood (plant) material sawn into planks or otherwise prepared for sale or use, especially as a building material.
Therefore, it can be said that the lumber used to construct a house frame is the example of a bioresource.
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Which of the following is correct?
1. Nonsister chromatids are genetically distinct
2. Sister chromatids are genetically identical
3. All of the other choices are correct
4. Homologous chromosomes are genetically distinct
The correct statement is: (2) Sister chromatids are genetically identical.
Sister chromatids are the copies of a single chromosome. These are therefore genetically identical. The sister chromatids are joined together at the region called centromere with the help of certain proteins. The chromatids are formed during the S phase of the interphase due to a process called duplication.
Chromosome is the compact form of DNA. It consists of the genetic material and certain proteins called histone proteins. The main role of chromosome can be seen during cell division. This is because the division of genetic material takes place in the chromosomal form.
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I need help with this pleasePreventing Heart DiseaseHealthy Living HabitsChoosing healthy meal and snack options can help you avoid heart disease and its complications. Be sure to eat plenty of fresh fruits and vegetables.By living a healthy lifestyle, you can help keep your blood pressure, cholesterol, and sugar normal and lower your risk for heart disease and heart attack. A healthy lifestyle includes the following:Eating a healthy diet.Maintaining a healthy weight.Getting enough physical activity.Not smoking or using other forms of tobacco.Healthy DietChoosing healthful meal and snack options can help you avoid heart disease and its complications. Be sure to eat plenty of fresh fruits and vegetables and fewer processed foods.Eating foods low in saturated fats, trans fat, and cholesterol and high in fiber can help prevent high cholesterol. Limiting salt (sodium) in your diet also can lower your blood pressure. Limiting sugar in your diet can lower you blood sugar level to prevent or help control diabetes.For more information on healthy diet and nutrition, see CDC’s Nutrition, Physical Activity, and Obesity Program website.Healthy WeightBeing overweight or obese increases your risk for heart disease. To determine if your weight is in a healthy range, doctors often calculate your body mass index (BMI). If you know your weight and height, you can calculate your BMI at CDC’s Assessing Your Weight website. Doctors sometimes also use waist and hip measurements to calculate excess body fat. They may use special equipment to calculate excess body fat and hydration status.Physical ActivityPhysical activity can help you maintain a healthy weight and lower your blood pressure, cholesterol, and sugar levels. For adults, the Surgeon General recommends 2 hours and 30 minutes of moderate-intensity exercise, like brisk walking or bicycling, every week. Children and adolescents should get 1 hour of physical activity every day.No SmokingCigarette smoking greatly increases your risk for heart disease. If you don’t smoke, don’t start. If you do smoke, quitting will lower your risk for heart disease. Your doctor can suggest ways to help you quit.
To maintain proper heart health, 3 fundamental activities can be carried out: avoid smoking, maintain a healthy diet and exercise constantly.
Cigarettes contain many harmful substances that are toxic to the body and can cause many conditions, including hypertension, which affects arterial health.
Having a healthy diet refers to reducing the intake of fats and sugars since fats can accumulate in the bloodstream impeding the flow and affecting the force that the heart must apply to pump blood, this is a condition called atherosclerosis.
Finally, exercise prevents disease by preventing fat accumulation, improving blood pressure and stimulating antioxidant systems that neutralize reactive oxygen species that can be generated by harmful substances such as those in cigarettes. Therefore, it helps overall health including heart health.
genes in different chromosomes ______ during meiosis. genes that are very close together in the same chromosome are ______.
Answer:
assort independently , linked.
Explanation:
Genes in different chromosomes assort independently during meiosis. genes that are very close together in the same chromosome are linked. The correct option is c.
What is meiosis?Meiosis is a type of cell division that occurs in reproducing organisms and results in a reduction in the number of chromosomes in gametes.
Homologous chromosomes are moved to opposite poles of the cell during anaphase-I of meiotic division.
This segregation also divides the alleles of genes found on the chromosomes into opposite poles.
Gene segregation is a random event, which means that alleles from one gene segregate independently of alleles from another gene. This necessitates the presence of the genes on distinct chromosomes.
The genes that are found on the same chromosomes are linked. This means they are inherited together and do not show independent variation.
Thus, the correct option is c.
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Your question seems incomplete, the missing options are:
a) do not assort independently; unrelated
b) assort independently; unrelated
c) assort independently; linked
d) do not assort independently; linked
true or false?lighting fixes nitrogen in compounds so plants can use it too make protein
Nitrogen fixation by lighting is what we call abiotic fixation, a process of oxidation that occurs by the lighting, creating nitrogen oxides through atmospheric nitrogen. specifically for a plant are needed nitrates (NO₃⁻)and ammonium (NH₄⁺).
17. SC.912.L.16.1If a female of this species has one chromosome 12 with a blue gene and another chromosome 12with an orange gene, and has both number 19 chromosomes with short genes, she will producewhich of the following egg types?a. only blue short gene eggsb. only orange short gene eggsc.one-half blue short and one-half orange short gene eggsd. three-fourths blue short and one-fourth orange short gene eggs
Asumming that both genes mentioned, color and height, are autosomal, this female's genotype is BbSS (B: blue and b: organge; S: short).
The possible eggs' genotypes will be:
BS: blue and short.
bS: orange and short.
Thus, the correct answer is option C.
will a solution of CO2 and water be acidic basic or neutral
Answer:
acidic !
Explanation:
Order these terms from more basic to more complex (for example, cell-tissue-organ)
Please help im so confused on these answers. :)
Answer: I think the answer is D
Explanation:
Desertification occurs when
a.
temperatures are extremely hot causing nothing to be able to grow
b.
an area becomes so damaged, nothing can grow there
c.
there is consistent winds
d.
the only plants which will grow are high-water use plants
Desertification is the degradative process through which lands lose fertility due to different natural or human factors, affecting ecosystemic services. B) an area becomes so damaged, nothing can grow there
What is desertification?
Desertification is the degradative process of land due to different factors. These factors might be natural events (such as changes in climatic conditions) or due to human activities.
Desertification causes fertile soil loss. Consequently, ecosystems can not accomplish their regulatory functions -ecosystemic services-. There is a significant loss in productivity.
Only a few forms of life can grow in these affected areas. Plant species decrease and finally disappear in desertic regions.
Arid, semiarid, and subhumid dry areas are considered to be the most susceptible ones to suffer the effects of desertification.
The current climatic change and the increasing human activities have worsened the situation in several regions.
The correct option is b. an area becomes so damaged, nothing can grow there.
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What’s the correct answer answer asap for brainlist
Answer:
C Are made of cells
Explanation:
Draw and label a model showing where the matter came from at the particle level to produce this particular kind of gas.
A particle model describes how the particles that make up a solid liquid or gas are arranged and how they move.
The particle theory of matter is a model that describes the arrangement and movement of particles in matter. Models are used to describe the physical properties of solids liquids and gases. Elements and compounds can be represented using particle diagrams. This is a box with colored spheres drawn to represent atoms or molecules.
These diagrams can represent the elements and compounds and their molecular composition by type of spheres and how they are connected. Certain chemical reactions can be represented using particle diagrams. In this diagram, the reaction mixture is represented both before the reaction occurs and after the reaction is as complete as possible. There are small spaces between particles in liquids but not as small as in solids.
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You are learning about human digestion—so maybe its time to put some of your knowledge to work.This is your opportunity to help children between the ages of 6—11 become aware of and combat childhood obesity. Develop a plan or strategy to combat childhood obesity in your town.
A plan to combat childhood obesity should be focused on the reduction of unhealthy food and a good diet based on nutritional knowledge.
Then, we can conclude that the correct answer would be:
Answer:The strategy to combat childhood obesity should have the following characteristics:
1) Limit the consumption of sugary and processed drinks.
2) Limit the consumption of ultra-processed foods such as sausages.
3) Reduce the amounts of salts and sugars that are added to daily meals.
4) Drink the necessary amounts of water daily.
5) increase the amounts of fruits and vegetables that are consumed per day and reduce the use of oils in large quantities for the preparation of meals.
6) Promote regular physical activity and reduce the time of sedentary activities (television and video games)
7) Have proper meal times.
which is the following is a type of passive trasport?
There are four types of passive transport:
Simple diffusion Facilitated diffusion Filtration Osmosis.Passive transport is defined as the movement of solutes from a region of high electrochemical potential on one side of the cell membrane to a region of low electrochemical potential on the other side. Endocytosis is a form of active transport. Endocytosis is the biological process by which molecules from the extracellular environment are taken up by cells.
Both diffusion and osmosis are passive transport processes. H No additional energy supply is required. Both diffusion and osmosis move particles from areas of high concentration to areas of low concentration. Passive Transport: Diffusion is a type of passive transport. Diffusion across a permeable membrane moves substances from a region of high concentration in this case the extracellular fluid down its concentration gradient to the cytoplasm.
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How does biosphere and geosphere work together 
Some types of beer are bottled with yeast. These beers are not carbonated at bottling but if you open them a few weeks later, they bubble Explain the source of this carbonation. Briefly explain how the Citric Acid cycle generates CO2, ATP, NADH and FADH₂ Give the total theoretical yield of each of these molecules during this cycle for one glucose molecule oxidized.
The beers are not carbonated at the bottling plant but are added with some amount of yeast with some quantity of sugar so that the yeast can feed on the sugar and produce carbon dioxide and alcohol, so that's why carbonation is not done during the bottling as yeast is able to produce CO2 by itself.
The bubbles that get generated after a week are due to the yeast as it consumes sugar and produces CO2 and alcohol.
Our planet has "covered its tracks" to clues of its birth and earliest
stages by destroying evidence of how it was formed through ...
erosion, volcanic activity and the shifting of continents and oceans.
the impact of meteorites and other space debris.
Answer: Erosion
Explanation: Erosion is the process in which the elements wear away at the object it is hitting such as water or wind whipping the side of a mountain over time this will wear away the stone. Erosion is the reason because it will wear away and evidence of the earth creation
What can cause pathogen cells to lyse open with perforin?A. AntibodiesB. AntigensC. Cytotoxic T cellsD. Helper T cells
What can cause pathogen cells to lyse open with perforin are Cytotoxic T cells.
The correct answer is option C.
The cell that can cause pathogen cells to lyse open with perforin is Cytotoxic T cells, which is in option C. So the correct option is option C, as Cytotoxic T cells, also known as CD8+ T cells, are a type of immune cell.
Perforin is a protein that forms pores or channels in the membranes of target cells. When a cytotoxic T cell identifies a pathogen-infected cell, it releases perforin, which inserts into the cell membrane of the target cell. The perforin molecules then assemble to form pores or channels, creating openings in the target cell membrane. So the correct option is option C.
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What is the function of structure W?
A. to attach the flower to the main stem
B. to protect the developing bud
C. to attract pollinators to the flower
D. to form the floral organs
The function of the structure W is to attract pollinators to the flower (option C).
What is a flower?A flower in botany is a reproductive structure found exclusively in group of plants called angiosperms (flowering plants), often conspicuously colourful and typically including sepals, petals, and either or both stamens and/or a pistil.
The parts of a flower are as follows:
PetalsSepalsPistil or carpel (female part)Stamen (male part)The petals of a flower is one of the component parts of the corolla of a flower. It applies particularly, but not necessarily only, when the corolla consists of separate parts i.e. when the petals are not connately fused.
Petals are often brightly colored as seen in the structure labelled W above. This colorful appearance is used to attract pollinators such as insects, butterflies for the process of reproduction.
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Answer:it’s c
Explanation:
study island
how is a complex transposon different from a simple transposon?
Answer: Complex transposons code for additional genetic elements, such as antibiotic resistance genes while Simple transposons only code for the transposase gene essential for the transposon itself.
Complex transposons contain additional genetic elements, such as antibiotic resistance genes, whereas simple transposons only contain the transposase gene, which is required for the transposon to function.
What are transposons?Transposons are repetitive DNA sequences that can move (transpose) from one location in the genome to another.
Transposon movement can cause mutations, alter gene expression, cause chromosome rearrangements, and enlarge genome sizes due to increased copy numbers.
DNA transposons can be used as genetic tools to insert a piece of foreign DNA into a genome.
Indeed, because these elements are not generally dependent on host factors to mediate their mobility, they have been used for transgenesis and insertional mutagenesis in various organisms.
Simple transposons only have the transposase gene, which is required for the transposon to function. Complex transposons have additional genetic elements, such as antibiotic resistance genes.
Thus, this is the difference between a complex transposon and simple transposon.
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die in Why are normal cells thought to suspension culture ? a . Their integrins denature .b . Their integrins are not able to interact with extracellular substrates .c .Their integrins are unable to transmit life - saving signals to the cell interior . d . They stop making integrins . e . b and c
The normal cells are thought to be suspension culture Their integrins are unable to transmit life-saving signals to the cell interior. Option C.
In this type of culture, single cells or cell aggregates grow or divide when agitated in a liquid medium. Suspension cultures of individual cells are useful for understanding the processes of plant growth and development. The advantage of plant cell suspension culture is the ability to produce therapeutic protein bioactive for the pharmaceutical and cosmetic industries.
Substances based on secondary metabolites Suspension cultures are liquid cultures in which cells are suspended. Suspension cultures grow faster than callus cultures which take 2-3 weeks. Additionally suspension cultures require continuous agitation, whereas agitation is not applicable to callus cultures. In adherent cell culture, cells grow attached to a substrate as a monolayer. In suspension cells, culture cells float freely in the culture medium.
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Describe the possible outcome of a PCR experiment in which (a) one of the primers is inadvertently omitted from the reaction mixture and (b) one of the primers is complementary to several sites in the starting sample.
The possible outcome of the PCR is The quantity of these strands would increment straightly with the number of cycles.
a. Just single DNA strands of a variable length reaching out from the staying preliminary would be gotten. The quantity of these strands would increment straightly with the number of cycles instead of geometrically.
b. PCR would yield a blend of DNA portions whose lengths compared to the separation between the position of the primer with a solitary binding site and the different destinations where the multispecific preliminary ties.
The DNA molecule is made from 4 nucleobases – adenine, cytosine, guanine, and thymine and may configure itself in some ways. It creates a four-stranded shape whilst 4 guanine bases form rectangular guanine is the simplest base capable of bond with itself.
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what does a scientist test when using a controlled experiment?
In a controlled experiment, the scientist changes an independent variable to study its effect on the experiment while all the other variables are kept constant.
Controlled experiments are those where all the variables are kept constant except the independent variables. This is done to increase the effectiveness and reliability of the experiments. The goal of controlled experiments is that the dependent variables should not ne affected or changed.
Independent variables are those that are the cause for the changes in the experiment. They themselves are not affected by the experiment but manipulation in them can change the other variables of the experiment called the dependent variables.
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Which heart chamber receives the brightest red blood?
the right atrium
the right ventricle
the left ventricle
the left atrium
The heart chamber which receives the brightest red blood is referred to as the left atrium and is denoted as option D.
What is Heart?This is referred to as the central organ of the circulatory system and is responsible for the pumping of blood to other parts of the body. The blood contain nutrients and oxygen which is vital for the growth and survival of cells.
The left atrium is one of the chambers of the heart and it collects the oxygen rich blood from the lungs which has bright red color and empties into the ventricles which is then to be transported and distributed to other parts of the body.
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The chamber of the heart that receives the brightest red blood is the left atrium. That is option D.
What is the heart?The heart is a muscular hollow organ that is the major organ of the cardiovascular system that helps in pumping of blood to the whole parts of the body.
The heart is divided by valves and a septum into four major chambers that include the following:
The right atriumThe right ventricleThe left ventricleThe left atriumThe left atrium is known to be the first part of the heart that receives oxygenated blood from the pulmonary vein which contains more oxygen.
This makes the blood to appear bright red because of increased oxygen levels of the blood in left atrium.
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What is a specialized internal cellular structure that is bound by one or more membranes?
O organelle
O cell wall
O ribosome
O flagella
What other adaptations might the cavefish have that may be of greater importance for the cavefish’s survival?There are also many examples of body structures in animals that show gradual changes over time. In some cases, these changes have reduced or removed the function of some body parts and organs. These reduced or lost structures are called vestigial structures. The human appendix and the leg bones of snakes are examples of this phenomenon. 1 Observe the drawings of the cavefish and the minnow shown in Figure 3. The fish are related to each other but the cave fish is blind and only has the remnants of an eye.
The cavefish it's a type of fish that lives in caves as its name says. Therefore, it has some adaptation that helps to survive in this specific kind of environment. This type of adaptation is called troglomorphism, and it implies evolutionary changes that help the cavefish to reduce the waste of energy developing structures that are not needed for the environment it lives in. Added to blindness (some species sense the environment using specialized cells found in the pineal gland), other characteristics are loss of pigment, energy-efficient swimming because of larger fins, and the loss of swim bladder.
Which type of bone would not have an epiphysis?
humerus (upper arm bone)
femur (connects hip to knee)
tibia (lower leg bone)
sphenoid (base of your skull)
Answer:
sphenoid (base of your skull)
What is a plate boundary?
Answer:
In Plate Tectonic Theory, the lithosphere is broken into tectonic plates, which undergo some large scale motions. The boundary regions between plates are aptly called plate boundaries. Based upon their motions with respect to one another, these plate boundaries are of three kinds: divergent, convergent, and transform.
Why are some hair changes reversible while others are permanent?Is there a chemical bond difference between naturally curly and naturally straight hair?
Hair changes can be reversible while others are permanent. Hair color can be back after some time because of the re-growth of melanocytes. Hair growth is being affected by several factors such as family history of hair loss, hormonal changes or lack of nutrition. Hair loss can be temporary or permanent. It can be reversible even without treatment if the condition is a result of alopecia areata or patchy hair loss. It can be permanent if it is hereditary.
The difference between naturally curly hair and naturally straight hair is the presence of disulfide bonds. Curly hair has more disulfide bonds than straight hair. These bonds keep the hair in the shape it was formed. Alteration can happen only by way of perming or relaxing.
Which statement is true about the sodium-potassium pump?
It transports ions through diffusion.
It only transports ions within a cell.
It uses ATP as energy.
It relies on random movement down a concentration gradient.
The sodium-potassium pump is It relies on random movement down a concentration gradient.
The correct option is D.
What is meant by concentration gradient?When an area has an increased particle density than the other, this is known as a gradient. A concentration gradient will cause particles in passive transport to diffuse along it from higher to lower concentrations until they are smoothed.
Why is gradient in concentration important?Understanding whether ions and particles flow randomly in a solution or gas depends on the gradient of concentration. It is the method used to move particles in a liquid from a region of higher concentration to one of a lower concentration.
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The complete question is -
Which statement is true about the sodium-potassium pump?
A-It transports ions through diffusion.
B-It only transports ions within a cell.
C-It uses ATP as energy.
D-It relies on random movement down a concentration gradient.
what general trend does electronegativity follow on the periodic table? please answer quickly!!
Answer:
b it increases as you move up a group
