Bone cells have a stellate shape, which is approximately 7 micrometers deep and wide by 15 micrometers in length. The cell body varies in size and contain 40-60 cell processes per cell. The cell to cell distance is between 20-30 micrometers.
Compact bone is dense and composed of osteons than spongy bone which is less dense and made up of trabeculae. Blood vessels and nerves enter the bone through the nutrient foramina to nourish bones.
Eukaryotic cells are larger and have membrane-bound organelles and rod-shaped chromosomes. Most eukaryotic cells lack a rigid cell wall and is observed in tissue culture and single-celled organisms. Animal cells are distinct from other eukaryotes, mostly plants, as they lack cell walls and chloroplasts and have smaller vacuoles. Due to the absence of cell wall, animal cells can change into a variety of shapes.
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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.
20 pts PLS HELP
Part 1
Which statement is part of the cell theory?
Responses
A. The flow of energy occurs within cells.
B. Every cell in an organism is identical.
C. Multiple cells are required to form life.
D.New cells arise from chemicals in the environment.
Part 2
What happens within the cytoplasm of a cell?
Responses
A. replication of DNA
B. maintaining of a cell's shape and structure
C. communication with other cells
D. majority of metabolic activity
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 best describes the climate and vegetation of the savanna?
What’s the correct answer answer asap for brainlist
Answer: letter d
Explanation: The savanna is dominated by grasses such as Rhodes grass, red oats grass, star grass, lemon grass, and some shrubs. The Savanna biome is part of a larger grassland biome and is mainly made up of flat grassland vegetation. The Savanna biome is also characterized by distinct wet and dry seasons and average-high temperatures throughout the year...
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 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.
How does biosphere and geosphere work together 
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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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.
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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will a solution of CO2 and water be acidic basic or neutral
Answer:
acidic !
Explanation:
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
Your 47 yr old patient complains of headaches and tests indicate that he has lower levels of cerebrospinal fluid than normal. You suspect he may have problems with his:
a. astrocytes
b. ependymal cells
c. oligodendrocytes
d. satellite cells
Your 47 yr old patient complains of headaches and tests indicate that he has lower levels of cerebrospinal fluid than normal.he may have problems with his oligodendrocytes.
What is cerebrospinal fluid?Cerebrospinal fluid (CSF) is a clear, colorless body fluid found within the tissue that surrounds the brain and spinal cord of all vertebrates.
Specialized ependymal cells in the choroid plexus of the brain's ventricles create CSF, which is then absorbed in arachnoid granulations. About 125 mL of CSF are present at any given moment, and 500 mL are produced daily. The CSF protects the brain inside the skull mechanically and immunologically by acting as a shock absorber, cushion, or buffer. The cerebral autoregulation of cerebral blood flow is another essential role played by CSF.
What is oligodendrocytes?The myelinating cells of the central nervous system are called oligodendrocytes (CNS). They are the result of a cell lineage that must go through an intricate and carefully timed series of processes such as proliferation, migration, differentiation, and myelination in order to generate the insulating sheath of axons.
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14. How are organisms in the domain Archaea classified?
Bacteria and archaea are both single-celled organisms with domains as their highest taxonomic rank. Bacteria belong to the domain Bacteria, while archaea belong to the domain Archaea.
What domain is Archaea classified in?Archaea are single-celled, prokaryotic organisms that lack membrane-bound organelles and are thus distinct from both bacteria and eukaryotes.Bacteria and archaea are both single-celled organisms with domains as their highest taxonomic rank. Bacteria belong to the domain Bacteria, while archaea belong to the domain Archaea.Archaea were classified as a distinct group of prokaryotes for the first time in 1977. The current Bacteria and Archaea classification is based on an operational-based model, the so-called polyphasic approach, which includes phenotypic, chemotaxonomic, and genotypic data, as well as phylogenetic information.To learn more about : Archaea
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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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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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What’s the correct answer answer asap for brainlist
Answer:
C Are made of cells
Explanation:
What is a specialized internal cellular structure that is bound by one or more membranes?
O organelle
O cell wall
O ribosome
O flagella
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:
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.
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.
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⁺).
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.
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)
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 general trend does electronegativity follow on the periodic table? please answer quickly!!
Answer:
b it increases as you move up a group
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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Our current understanding of evolution is called a theory befit has been
The word theory often has been misunderstood, taking it in a sense of something hypothetical, nonetheless in sciences Theory is totally different from a hypothesis. Even more, Theory is above the level of law, why is this? well, the answer is simple, a scientific theory is a set of concepts that includes abstraction of the observable phenomenon, quantifiable proprieties as well as laws/rules, that describe the relationships between the empirical data, observations, and concepts. In other words, Theories include not just the abstraction of the phenomenon but a solid base of previous knowledge and evidence. So theories are built to explain empirical data or observable phenomena and are proposed as a set of principles that explain data.
Taking this into consideration we can see why evolution since Darwin's Origin of species has been called a Theory. It has a solid base of empirical evidence as well as well-supported literature, that has been enriched with the scientific advance, these days we can say that we are working with Evo-Devo, evolutionary developmental theory.
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 of the following best describes how the parent cell produces daughter cells with the same number of chromosomes during asexual reproduction?
Sister chromatids are separated into two nuclei, and after telophase they are replicated.
The chromosomes are copied during interphase, and during mitosis, they separate into two nuclei.
The chromosomes are separated during interphase and form two individual nuclei during prophase.
Sister chromatids are copied during prophase, and during anaphase they separate to form two nuclei.
The statement that best describes how the parent cell produces daughter cells with the same number of chromosomes during asexual reproduction is as follows: chromosomes are copied during interphase, and during mitosis, they separate into two nuclei (option B).
What is asexual reproduction?Asexual reproduction is a form of reproduction that involves neither meiosis nor fusion of gametes instead it involves only one parent organism.
Asexual reproduction occurs via a cell division process called mitosis. Mitosis is the division of a cell nucleus in which the genome is copied and separated into two identical halves.
During the mitotic process, the chromosomes of the parent cell gets copied in the interphase or resting stage of the cell. After which, the cell splits into two nuclei that will be present in the identical daughter cells.
It is worthy of note that all these events occurs in a single parent organism and unlike sexual reproduction, does not require two organisms.
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Answer:
2nd
Explanation:
not 4th for sure, maybe 2nd but better try to find other source if possible
