during which week of pregnancy does the brain begin to develop
Answers
The brain begins to develop in the third week of pregnancy. This is when the neural tube, which eventually becomes the brain and spinal cord, begins to form. The neural tube starts as a flat sheet of cells and then folds into a tube-like structure. The top part of the tube eventually becomes the brain, while the bottom part becomes the spinal cord. As the neural tube develops, the cells within it differentiate into various types of neurons and glial cells, which are the building blocks of the nervous system. The development of the brain is a complex process that continues throughout pregnancy and beyond, but the initial formation of the neural tube is a critical first step in this process.
Related Questions
when an infant or child is shaken, her brain bounces inside the skull cavity causing bruising, bleeding, and swelling of the brain. which of the following is a possible long-term effect of shaken baby syndrome, or sbs?
Answers
Shaken baby syndrome, or SBS, can have devastating long-term effects on the child's development and overall health. Some possible consequences of SBS include permanent brain damage, developmental delays, learning disabilities, vision or hearing loss, seizures, paralysis, and even death.
Children who survive SBS may require ongoing medical care, rehabilitation, and special education services to manage their symptoms and improve their quality of life. Additionally, caregivers who shake a baby can face criminal charges and legal consequences, as SBS is a form of child abuse that can cause irreparable harm. It is important to seek medical attention immediately if you suspect a child has been shaken.
Shaken Baby Syndrome (SBS) can lead to severe long-term effects in infants or children. Some potential consequences include developmental delays, cognitive impairments, vision or hearing loss, motor dysfunction, and epilepsy. These issues may significantly impact the child's quality of life and require ongoing support and medical care. Early intervention and treatment are crucial in managing the effects of SBS and preventing further harm.
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HELP!!!!! WILL GIVE BRAINILEST!!!!! Consider the following experiment. A plant is set in one corner of a box. A top is put on the box so that the hole in the top is opposite to the plant.
Over the next week, the plant in the box should:
A. grow downward
B. grow away from the hole
C. bend and grow towards the hole
D. die for lack of air
Answers
Answer:
C. bend and grow towards the hole
Explanation:
Plants grow toward the light as a way of generating more energy through photosynthesis. So how do the plants grow toward the light? Plants contain a hormone called auxin, which causes plant cells to grow longer. Plant cells on the shady side of a plant contains more auxin hormones, making the plant bend toward the light as the cells in the shade el
how do muscles get the energy they need to function
Answers
Answer:
Muscles use the stored chemical energy of food we eat and convert that to heat and energy of motion (kinetic energy). We need energy to enable growth and repair of tissues, to maintain body temperature and to fuel physical activity. Energy comes from foods rich in carbohydrate, protein and fat
Explanation:
An oil rig in the Gulf of Mexico reported having damage to the steel foundation. Because the steel in structures in other oceans did not have the same damage, it was theorized that organisms in the Gulf were causing this issue. Which of the following passages correctly identifies the role engineers and scientists would play solving this real life issue? A. Both Biologists and Engineers were called in to isolate and identify living organisms in the gulf. Biologists designed a filter system Engineers used to trap microscopic organisms that could be damaging the structure. Engineers alone worked to find a solution to the oil rig’s problem. B. None of the above. Biologists and Engineers do not work together. Scientists research and experiment only while engineers only construct materials. C. Engineers were called in to isolate and identify living organisms in the gulf. Both biologists and engineers designed a filter system to trap microscopic organisms that could be damaging the structure. Biologists alone worked to find a solution to the oil rig’s problem. D. Biologists were called in to isolate and identify living organisms in the gulf. Engineers designed a filter system Biologists used the filter to trap microscopic organisms that could be damaging the structure. Both Biologists and Engineers worked to find a solution to the oil rig’s problem.
Answers
Answer:
I can't understand?
Explanation:
Please tell clearly. Please tell in short.
Using this information describe one contribution of each of the following to ATP synthesis:
a. Catabolism of glucose in glycolysis and pyruvate oxidation.
b. Oxidation of intermediates in the Kreb's cycle
c. Formation of a proton gradient by the electron transport chain
Answers
a. Catabolism of glucose in glycolysis and pyruvate oxidation - Produces NADH that is used in the ETC.
b. Oxidation of intermediates in the Krebs Cycle - Produces NADH or FADH2 for use in the ETC.
c. Formation of a proton gradient by the electron transport chain- The flow of protons through membrane bound ATP synthase generates ATP
What is ETC ?The electron transport chain (ETC) and chemiosmosis are the two processes that make up oxidative phosphorylation. The ETC is made up of a group of proteins that are affixed to the inner mitochondrial membrane and organic molecules that allow electrons to pass through and release energy through a series of redox processes.
An electron transport chain (ETC) is a collection of protein complexes and other molecules that associate protons (H+ ions) with the movement of electrons from electron donors to electron acceptors through redox processes (both reduction and oxidation occur simultaneously).
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one means of reproduction called budding occurs when a new organism develops as an outgrowth of its parent (singular). could organisms that develop by budding be defined by the biological species concept?
Answers
The organisms that develop by budding be defined by the biological species No, because this form of reproduction does not allow examination of interbreeding, option C.
In a kind of asexual reproduction called budding or blastogenesis, cell division at one specific place results in the development of a new creature from an outgrowth or bud. The freshly produced creature is a clone and, with the exception of mutations, is genetically identical to the parent organism because the reproduction is asexual. Regenerative cells are used for reproduction in the budding process by organisms like hydra.
A hydra's bud forms as an outgrowth as a result of recurrent cell division at one particular location. When completely grown, these buds separate from the parent body to create new, independent individuals. They first grow into small individuals.
Asexual reproduction by internal budding, also known as endodyogeny, is favoured by parasites like Toxoplasma gondii. It entails a peculiar procedure in which
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Complete question:
One means of reproduction called budding occurs when a new organism develops as an outgrowth of its parent (singular). Could organisms that develop by budding be defined by the biological species concept?
a) Yes, because wild populations of the organisms have different geographic distributions
b) Yes, because this form of reproduction occurs in natural environments
c) No, because this form of reproduction does not allow examination of interbreeding
d) No, because the offspring may look very different than the parent
During exercise, you breathe in and breathe out an extra 3 liters of air. is it true or false ?
Answers
During exercise, it is true that you breathe in and breathe out an extra 3 liters of air.
When you engage in physical activity, your body requires more oxygen to meet the increased demand for energy. To supply this oxygen, you breathe in a larger volume of air. Additionally, exercise also increases your respiratory rate, which means you take more breaths per minute. This combination of deeper breaths and increased breathing rate results in the exhalation of approximately 3 liters of additional air during exercise.
This process helps to deliver oxygen to your muscles and remove carbon dioxide, which is a waste product of metabolism. So, it is indeed true that during exercise, you breathe in and breathe out an extra 3 liters of air.
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What characteristic of carbon dioxide causes it to suffocate people next to the ground?
A volcanic lake exists near where your friends and family live. How would you make sure that the volcanic lake is not in danger of releasing carbon dioxide gas?
Answers
Characteristic of carbon dioxide causes it to suffocate people next to the ground because Carbon dioxide is a toxicant in addition to being a cause of asphyxiation via hypoxia.
It has been demonstrated that at high doses, it can induce unconsciousness practically immediately and respiratory arrest within one minute.
Look for shelter inside. Roll into a ball if you get caught in a rockfall to protect your head. Be mindful of rising water and potential mudflows in low-lying regions if you're close to a stream or river. Move as swiftly as you can upslope. For burns, seek treatment straight soon.
Quick medical attention can save lives. Move away from the area right away if volcanic gases and fumes irritate your eyes, nose, or throat. When you are no longer in contact with the gases or fumes, your symptoms should go away. If the symptoms persist, see a doctor.
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xld agar was originally developed to differentiate salmonella from shigella. shigella colonies are unable to ferment xylose, do not produce lysine decarboxylase, and do not produce hydrogen sulfide. how would shigella appear on an xld agar plate?
Answers
Because of the presence of Salmonella type colonies, the agar will turn red. Red colonies of Shigella species Coliform colonies range from yellow to orange. Pink, flat, rough colonies of Pseudomonas aeruginosa
On XLD, how does Shigella grow?By inhibiting other enteric pathogens, XLD agar selectively promotes the growth of Salmonella and Shigella and differentiates Gram-negative enteric bacteria based on xylose fermentation, lysine decarboxylation, and the production of hydrogen sulfide from sodium thiosulphate.Salmonellae decarboxylate lysine and deplete xylose, causing the pH to rise and mimicking the Shigella reaction. A hydrogen sulphide indicator, on the other hand, distinguishes the presence of Salmonella and Edwardsiella spp. from that of Shigellae.Shigella species, on the other hand, are Gram-negative, facultatively anaerobic, nonsporulating, nonmotile rods in the Enterobacteriaceae family. Within two days, they do not decarboxylate lysine or ferment lactose. They use glucose and other carbohydrates to generate acid but not gas.To learn more about shigella refer to :
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Basic life processes account for what percentage of energy use in animals?
25%
70%
50%
30%
10%
Answers
Approximately 10% of the total energy used by animals is devoted to the basic life processes of metabolism, respiration, and excretion.
Here correct answer is 10%
These processes are necessary for survival and require energy to keep cells alive and functioning. Metabolism includes all the biochemical reactions used to produce energy and create new molecules for growth and repair. Respiration is the process of taking in oxygen and expelling carbon dioxide during cell respiration. Excretion is removing the waste products that build up in cells as a result of metabolic processes. As animals carry out these basic life processes, they need energy to fuel them.
As a result, a substantial portion of an animal’s energy use is devoted to these life processes. Although this is only a small fraction of the total energy expended by animals, it is essential to their survival and health. Without the energy from these processes, the body would not be able to function properly.
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Any two differences between plant cells and animal cells
Answers
Answer:
A plant cell is surrounded by rigid cell wall whereas animal cell does not have cell wall. Presence of a large vacuole in plant cell, which is small in animal cell. Plant cells are larger than animal cells. Plant cells have plastids whereas animal cells do not have plastids.
Answer:
Plant cells:
Have a cell wall
Chloroplasts
Animal cells:
Smaller vacuoles
Irregular shape
Hope this helped!
please help me with this question
Answers
Answer: C
Explanation:
In which part of the water cycle is water getting the MOST energy from the sun?
Answers
Answer:
Evaporation
Explanation:
Cause then sun evaporates the water and turns them to water vapor which turns into clouds which then the clouds release the water if there is to much water in them and then the cycle keeps on going on and on
:D
Certain flightless beetles have wings that have no function. Which type of structure are the wings an example of?
Answers
Answer:
I am not completely sure. I would say they are vestigial structures. some use them for display
Explanation:
Answer:
Vestigial Structure
Explanation:
Suppose that a portion of double-stranded dna in the middle of a large gene is being transcribed by an rna polymerase. As the polymerase moves through the sequence of six bases shown in the diagram below, what is the corresponding sequence of bases in the rna that is produced?.
Answers
Answer:
UGAGCC
Explanation: none
The host says that osteoblasts and osteoclasts are like “frenemies “ working closely and communicating with each other to achieve opposite actions. Where else in the human body have you seen this type of relationship
Answers
Osteoclasts are responsible for aged bone resorption and osteoblasts are responsible for new bone formation.
What are the functions of osteoclasts?Osteoclasts are the cells that degrade bone to initiate normal bone remodeling and mediate bone loss in pathologic conditions by increasing their resorptive activity.
The primary role of osteoblasts is to lay down new bone during skeletal development and remodelling. Throughout this process osteoblasts directly interact with other cell types within bone, including osteocytes and haematopoietic stem cells.
The area of the osteoclast next to bone forms a “ruffled border” consisting of multiple infoldings of the osteoclast cell membrane. It secretes acid and proteases across the ruffled border.
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Food remains between the cheek and the teeth/gums after the swallowing process is called:______.
Answers
Food remains between the cheek and the teeth/gums after the swallowing process is called oral, pharyngeal, and esophageal.
Explain about oral, pharyngeal, and esophageal.The bolus is voluntarily moved during the oral phase into the oropharynx.The first stage of deglutition is the oral portion of swallowing, which is a voluntary activity. Another name for it is the buccal phase.In order to do this, the tongue must contract in order to force the bolus posteriorly into the oropharynx and then up against the soft palate.The bolus moves involuntarily from the oropharynx into the esophagus during the pharyngeal phase.The pharyngeal step of swallowing comes next. The pharyngeal phase is an involuntary procedure, in contrast to the oral phase. The tongue is first obstructing the oral cavity. Then, by raising the soft palate, the nasopharynx is separated from the oropharynx and laryngopharynx soft palate and its uvula. The bolus moves involuntarily through the esophagus and into the stomach during the esophageal phase.The esophageal phase is the last stage of deglutition. This process, like the pharyngeal phase, is uncontrollable.Learn more about pharyngeal Here
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Part 1
Suppose a new coal-burning power plant is planned in your community.
Under the Clean Air Act, how can the public participate in decisions concerning emissions regulations placed on the plant?
What could you do if the plant is placed in your community and later leads to pollution beyond the amounts allowed by the EPA?
Part 2
What are the six criteria pollutants monitored under the 1990 Clean Air Act?
What part of the government oversees monitoring them in the environment, and what happens if a business or organization emits them at above allowable levels?
Part 3
Explain how the emissions trading program works and identify one major advantage and one major disadvantage.
Explain how the program must work in order to be successful.
Answers
The Clean Air Act mandates that the EPA establish National Guidelines for Ambient Air Quality (NAAQS). Carbon monoxide, lead, ozone layer nitrogen dioxide, fine particulate matter, and sulfuric acid are the current NAAQS.
Which of the following pertain to the six major for air contaminants as defined by the Clean Air Act? Find out in this quizlet?The statute designated six contaminants for monitoring and control. Sulphur dioxide, nitrogen oxides, monoxide, particulate pollution, tropospheric ozone, or cadmium, among others. The six pollutants mentioned in the Clean Air Act for which the EPA must define the appropriate levels of each pollutant.
What are the six major air pollutants regulated by the EPA criterion pollutants?EPA has set national standards for air quality (NAAQS) for six of its most prevalent air pollutants, known as "criteria" air pollutants (or simply "criteria pollutants"). These pollutants are carbon monoxide, lead, ozone at the ground level, particulates, nitrogen dioxide, and sulphate dioxide.
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How many chromosomes are in the cells after they divide? How many chromatids are there?
Answers
Answer:
two chromatids
After DNA replication, each chromosome now consists of two physically attached sister chromatids. After chromosome condensation, the chromosomes condense to form compact structures (still made up of two chromatids). As a cell prepares to divide, it must make a copy of each of its chromosomes.
Explanation:
hope it help to you:)
Type of star that is formed from a dense core left over from a supernova?
Answers
Answer:
Neutron Stars
Explanation:
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in the netherlands, if someone has a handicap and is unable to find a sexual partner, the government will pay to provide one for this individual.
Answers
The Netherlands provides payment for sexual partners for individuals with disabilities.
It's important to note that individual preferences, relationships, and intimate matters are considered private and personal, and the government does not typically intervene in such matters.The Netherlands does have a strong focus on disability rights and providing support and services for individuals with disabilities, including accessibility, healthcare, and social welfare. However, the specific provision of a sexual partner is not a government-funded service.It's always recommended to consult official government sources or reach out to relevant organizations specializing in disability rights and support in the Netherlands for the most accurate and up-to-date information on available services and programs.
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a cell with 12 chromosomes under goes mitosis, how many daughter cells are formed?
a. 2
b. 6
c.12
d 24
Answers
Answer:A
Explanation:
1. Bacteria. Two bacteria were placed in a dish. The number of bacteria quadruples every hour. There are now 131,072 bacteria in the dish. How many hours have passed since the original two bacteria we
Answers
To determine the number of hours that have passed since the original two bacteria were placed in the dish, we can use the fact that the number of bacteria quadruples every hour.
Starting with two bacteria, we can observe the progression:
Hour 1: 2 bacteria
Hour 2: 2 x 4 = 8 bacteria
Hour 3: 8 x 4 = 32 bacteria
Hour 4: 32 x 4 = 128 bacteria
Hour 5: 128 x 4 = 512 bacteria
Hour 6: 512 x 4 = 2048 bacteria
Hour 7: 2048 x 4 = 8192 bacteria
Hour 8: 8192 x 4 = 32768 bacteria
Hour 9: 32768 x 4 = 131072 bacteria
Therefore, it took 9 hours for the number of bacteria to reach 131,072.
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a man with hemophilia (a recessive, sex-linked condition) has a normal daughter, who marries a normal man. what is the probability that a daughter will be a hemophiliac? a son? if the couple has four sons, that all will be affected?
Answers
Answer:
read explanation
Explanation:
suppose the daughter has the reccesive gene and so does her husband the chances are aproximatly 25% in that case one of the 4 sons will be affected
In the beginning of an experiment, there are 10 bacteria. Suppose the rate of growth is proportional to the number of bacteria. After one hour, the number of bacteria increase to 20. Suppose P(t) is the number of bacteria present at time t. Try to find P(t).
Answers
In this experiment, the rate of bacterial growth is proportional to the number of bacteria present. We can use this information to find an equation that describes the number of bacteria at any given time.
Let's start by assigning variables. Let P(t) represent the number of bacteria at time t. We know that at the beginning of the experiment, there are 10 bacteria, so we can write this as P(0) = 10.
We are given that after one hour, the number of into 20. This means that after one hour, P(1) = 20.
Since the rate of growth is proportional to the number of bacteria, we can write this relationship as a differential equation: dP/dt = kP, where k is the proportionality constant.
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For an upcoming speech, Marcie began her research on the subject of nanotechnology on Wikipedia. What does Marcie need to keep in mind while reviewing an article from this site? Group of answer choices
Answers
Marcie must consider the following while examining a Wikipedia article:
Authority and expertise: Marcie should evaluate the article's authors' credentials. She can verify the material with experts or established organizations. Marcie should know that Wikipedia attempts towards neutrality, but prejudices can still exist.
Verifiability and citations: Marcie should verify that the article cites reputable sources. These citations will help her verify the material.
Currency and updates: Marcie should evaluate the article's currency and relevance to current research. She can check the article's edit history.
Use as a beginning point: Marcie should remember that Wikipedia can provide a broad overview of the issue for research.
Marcie can utilize Wikipedia as a resource while being mindful of its limitations and verifying and validating the information.
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Natural processes such as speciation and gradualism provide the genetic basis for
a. evolution
C. biogenesis
b. spontaneous generation
d. sexual reproduction
Answers
Answer:
A. Evolution
Explanation:
Natural processes like speciation create variation in species, making them have biodiversity and a diverse gene pool.
Gradualism also allows for species to change gradually over time.
Both of these processes allow for evolution to occur, as speciation can create more favorable traits that will be passed down with the process of gradualism.
So, the correct answer is A, evolution.
Natural processes such as speciation and gradualism provide the genetic basis for evolution. Thus, option A is correct.
What is speciation?Natural processes like speciation create variation in species, making them have biodiversity and a diverse gene pool. Gradualism also allows for species to change gradually over time.
Both of these processes allow for evolution to occur, as speciation can create more favorable traits that will be passed down with the process of gradualism.Traits may be defined as the appearance or manifestation of a character. In genetics, traits are also known as Phenotypes.
Natural selection always carries their successful or most favorable traits into the next generation and eliminates the unsuccessful or least favorable traits. Or in other words, natural selection states the occurrence of the most favorable variations.
Therefore, Natural processes such as speciation and gradualism provide the genetic basis for evolution. Thus, option A is correct.
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During phagocytosis of one cell to another, the larger cell engulfs the smaller cell by enclosing it in a part of its plasma membrane which then pinches off so the cell is then within the larger cell. Given this may have been the process that brought bacterial cells into the ancestors of eukaryotic cells as endosymbionts, what structural characteristics might be expected in mitochondria and chloroplasts?
Answers
Explanation:
Phagocytosis is the process by which cells ingest large particles, including other cells, by enclosing the particles in an extension of the cell membrane and budding off a new vesicle. During pinocytosis, cells take in molecules such as water from the extracellular fluid.
Recessive disorders related to genes found on the X chromosome but not on the Y are more commonly expressed in ________
Answers
Why do plants have trouble growing in space?
Answers
Answer:
The first challenge in growing plants in space is how to get plants to grow without gravity. This runs into difficulties regarding the effects of gravity on root development, providing appropriate types of lighting, and other challenges
Answer:
because, The first challenge in growing plants in space is figuring out how to get them to thrive in the absence of gravity. This presents difficulties in terms of the impact of gravity on root growth, as well as the provision of adequate lighting and other issues.
Explanation:
Gravity has an impact on root formation, but the scientists discovered that their space plants didn't need it to thrive. The space flowers showed common root growth patterns such as "skewing," where roots slant slowly as they branch out, when grown on a nutrient-rich gel in transparent petri plates.