Answer:
The corn that we grow today has not changed since prehistoric times.
Explanation:
A van travels 2 kilometers due south, turns left, and then travels 1 kilometer. It takes a left turn again
and travels 2 kilometers. What is the displacement of the van?
A) 3 km SE
B) 2 km S
C) 1 km E
D) 5 km SE
A van travels 2 kilometers due south, turns left, and then travels 1 kilometer. It takes a left turn again and travels 2 kilometers , then the total displacement is 1 kilometer to east .
What is displacement ?The term "displacement" refers to a shift in an object's position. It is a vector quantity with a magnitude and direction. The symbol for it is an arrow pointing from the initial location to the ending place. For instance, if an object shifts from location A to position B, its position changes. Displacement is the term for this shift in an object's position.
It depends upon both magnitude and direction . it can be positive , negative or zero .
Given ,
a van travels 2 kilometers due to south
then turns left and travels 1 kilometer
and then turns left and travels 2 kilometers .
AS we know is the shortest distance travel by the body or the object thus the displacement of the van is 1 kilometer to east .
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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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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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What’s the correct answer answer asap for brainlist
Answer:
it's phosphorus and nitrogen so answer should be (B)
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
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.
Which of the following is likely to increase in livestock as the ozone layer is increasingly depleted?
A. skin cancer
B. kidney disease
C. brain cancer
D. heart disease
what is unique about transduction compared to normal bacteriophage infection?
The distinctive feature is that DNA gets transferred from one cell's chromosome to another by the process of transduction.
Transduction is the term used to describe the process by which a virus spreads its genetic material from one bacterium to another. Bacteriophages are viruses that infect bacterial cells and use them as hosts for the production of more viruses. Transduction is the method through which a virus or viral vector inserts foreign DNA into a cell. The viral transmission of DNA from one bacteria to another is an effective example of horizontal gene transfer. Bacteriophages are a specific class of virus that attack bacteria. The name "bacteriophage" literally translates to "bacteria eater" since it destroys host cells. Thus, transduction is the process by which DNA is transferred from one cell's chromosome to another.
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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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Fill in the blank below with your best judgement, does not have to be just one word.Using the method "reduce, reuse, recycle" can prove efficient in ________________.
Using the method "reduce, reuse, recycle" can prove efficient in significantly reduce the amount of waste that is thrown away, conserving natural resources, energy, land, landfill space and money that would be used to dispose the waste. It also limits the consumption of non-renewable resources.
what general trend does electronegativity follow on the periodic table? please answer quickly!!
Answer:
b it increases as you move up a group
list 10 plant tissue and their location
The plant tissues are the parenchyma, collenchyma, pith, protoxylem, meta xylem, xylem, phloem, sclerenchyma, cortex, and epidermis.
What are the uses of plant tissues?
Aid in the mechanical strength of organs. They contribute to the organs' elasticity and flexibility. They divide to create new cells and aid in plant growth. They contribute to cellular metabolisms such as photosynthesis, regeneration, and respiration.
The following are the locations of different plant tissues
Parenchyma - soft plant partssclerenchyma- in the stems around the vascular bundles, leaf veins, and the hard covering of the fruit, seed, and nutscollenchyma - stems and leaves of mature herbaceous plantspith- the center of the stemprotoxylem- It is present on the periphery of the stem and inside of the root.meta xylem- It is present on the inside of the stem and periphery of the roots.xylem - a major part of a mature woody stem or rootphloem- in the center of the vascular bundle.cortex- between the epidermis (surface cells) and the conducting or vascular tissues of stems and roots epidermis- the outer layer of all plant organsTherefore, plant tissues are spread all over the plant and help in various functions.
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Definicion de ecosistema
how do you balance endangered species with the need for people to have water?
The endangered species of aquatic habitat can be balanced along with the usage of water by using water wisely and also preventing the water pollution so that the minimized habitat does not become toxic for the species.
Endangered species are those that are on the verge of extinction in the coming future. The reason for being endangered can be various like loss oh habitat, lack of resources or increased competition. Genetic variations can also be the reason.
Water pollution refers to the contamination of water bodies due to human activities. The reasons causing water pollution are: discharge of waste either household or industrial into the water, discharge of fertilizers or other chemicals like detergents, etc.
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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 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...
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.
this is 100 point
How long are the polymers that make them up? 1 monomer? 2 monomers? Many monomers?
2Points
Answer in complete sentences.
The polymers that make them up: are monomers.
A polymer is any of a category of natural or artificial substances composed of very large molecules, called macromolecules, which are multiples of less difficult chemical units known as monomers.
A polymer is a substance or cloth which includes very massive molecules referred to as macromolecules, composed of many repeating subunits. due to their broad spectrum of homes, both artificial and herbal polymers play critical and ubiquitous roles in everyday lifestyles. Products crafted from polymers are all around us: clothing crafted from synthetic fibers, polyethylene cups, fiberglass, nylon bearings, plastic baggage, polymer-based totally paints, epoxy glue, polyurethane foam cushion, silicone coronary heart valves, and Teflon-covered cookware. The listing is almost limitless.
Examples of synthetic polymers consist of nylon, polyethylene, polyester, Teflon, and epoxy. natural polymers arise in nature and may be extracted. they're regularly water-primarily based. Examples of certainly taking place polymers are silk, wool, DNA, cellulose and proteins.
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A student produces a labeled drawing of a virus for a presentation. The student states that the capsid has a function similar to the nuclear membrane found in animal cells.
Which of these describes the similar functions of capsids and nuclear membranes?
The similar functions of capsids and nuclear membranes Both protect genetic information for the structures.
The main similarity and function of capsid membranes and nuclear membranes is to provide protection. Most viruses use the canonical nuclear pore complex NPC to import their genome into the nucleus. The viral capsid which is larger than the nuclear pore is degraded before or during passage through the NPC allowing entry into the core of the genome.
Virus structure. In simpler viruses, the virion consists of a single nucleic acid molecule surrounded by a protein shell the capsid. Together the capsid and its encapsulated nucleic acid form a nucleocapsid. These barriers include the plasma membrane and underlying cell cortex a very dense cytoplasm with severely restricted molecular transport reviewed and access to sites of viral replication or assembly. Includes other membranes that must be passed through to obtain or obtain.
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WHAT'S MEAN BY TEGMENTUM..?
Thanks !! ;-;
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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How does biosphere and geosphere work together 
what is photosynthesis?
anyone wànna talk :/ ?
Answer:
the process in which green plants and other
organisms use sunlight to synthesize nutrients
from carbon dioxide and water
Photosynthesis is a specific energy-converting process by which green plants and other photosynthetic organisms use sunlight to create chemical energy that can be harnessed to carry out the other metabloic processes of their cells.
Hope this helps you.
all____ substances do not mix with water
Answer: Insoluble
Explanation: When an ionic substance (salt) dissolves in water , it is broken up into individual cations and anions which are surrounded by water molecules. ... Many substances do not dissolve in water and that is because they are non-polar and do not interact well with water molecules. A common example is oil and water .
An intron is a segment of RNA found in pre-messenger
RNA (pre-mRNA) molecules. It must be removed to make
the mRNA molecule functional. Some introns are capable
of catalyzing the reaction that removes them from larger
RNA molecules.
What is the intron acting as in this scenario?
A. A carbohydrate
B. A lipid
C. An enzyme
D. A membrane
The intron acting in this scenario is A carbohydrate. Option A.
The most important function of introns is to allow alternative splicing, allowing multiple proteins to be made from a single gene. Some introns are spliced and further processed to encode functional RNA molecules. The first stage is the genomic intron, which is the DNA sequence of the introns.
Introns are regions within a gene that do not remain in the final mature mRNA molecule after transcription of the gene and do not code for the amino acids that make up the protein encoded by that gene. Most protein-coding genes in the human genome consist of exons and introns. Introns are nucleotide sequences in DNA and RNA that do not directly code for proteins and are removed during mRNA maturation by RNA splicing during the precursor messenger RNA stage.
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Answer:definitely enzyme!
Explanation:just took the test - verified!
What’s the correct answer answer asap for brainlist
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.
Rangelands are managed by the
A. U.S. Fish and Wildlife Service
B. National Weather Service
C. Department of Justice
D. Bureau of Land Managemen
What are the functions of the different body systems and how do they interact
with each other?
Nervous System-
Digestive System-
Circulatory System-
Respiratory System-
How does the food move in my body ?
Answer:
Food moves through your GI tract by a process called peristalsis. The large, hollow organs of your GI tract contain a layer of muscle that enables their walls to move. The movement pushes food and liquid through your GI tract and mixes the contents within each organ.mark me brainlist if it is helpful to you
When you eat, food enters your alimentary canal. The alimentary canal is a series of organs that form a pathway from your mouth to your anus.
As food moves down this pathway, it's processed and changed to waste. After food is modified to waste, it's pushed out of your body in a bowel movement.
The stomach breaks down food into a liquid mixture. The small intestine absorbs nutrients from the liquid mixture. What remains is a liquid waste. The large intestine (colon) absorbs water from the liquid waste, converting it into solid waste (stool).
Nerves throughout your alimentary canal tell your muscles how fast to contract. Muscles within the intestines contract to move food and waste through the digestive tract. The rectum stores stool until a movement occurs. The anus is the opening where stool leaves the body.
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