The part of the brain that goes through dramatic development in middle childhood is known as the Frontal lobe and the behavioral functions that improve as a result of this are cognitive flexibility and reasoning. Thus, the correct option for this question is B.
Which part of the brain control cognitive flexibility and reasoning?The part of the brain that controls cognitive flexibility and reasoning is known as the Prefrontal cortex (PFC). It plays a central role in cognitive control function. The dopamine in the PFC regulates cognitive control which significantly influences attention, inhibition, memory, flexibility, etc.
The frontal lobe of the brain keeps on growing from childhood to adolescence which increases the cognitive ability and flexibility in the emotions of an individual. Along with these functions, it also supports intellectual reasoning and thought processes.
Therefore, the frontal lobe is the part of the brain that goes through dramatic development in middle childhood the behavioral functions that improve as a result of this are cognitive flexibility and reasoning. Thus, the correct option for this question is B.
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****** mary has decided she needs to quit smoking for her health and the health of her family. she has spoken with her doctor and has gathered information from the internet and directly from friends who have quit smoking. what does mary need to do next?
which one is not a cell of the immune system
A. T cells
B. B cells
C. White blood cells
D. Red blood cells
Which base is normally used in the synthesis (making) of RNA but not in the synthesis (making) of DNA?
The correct answer is uracil.
Uracil is one of the pyrimidine nucleotide bases which is the component of nucleic acid-RNA. In RNA, uracil binds to adenine via two hydrogen bonds (complementary binding). Uracil is not found in DNA, it is replaced by thymine because it is thymine’s demethylated form.How many dna fragments left when you use two restriction enzymes?
Select the statement which indicates a good ergonomic practice A. Gina sits in the same position for long periods of time B. Sam uses a power screwdriver to avoid repetitive motions C. Therese squints to see the information on her computer monitor
Ergonomics is the science of designing work processes and equipment in a workstation to make employees comfortable and increase their productivity. Ergonomics is important because when you're at work and your body is in stressful situations like improper posture, extreme temperature, or repeated movements, your musculoskeletal system is affected which results in lower productivity.
Sitting in the same position for long periods of time and squinting are not good ergonomic practices. Sam using a power screwdriver to avoid repetitive motions is a good ergonomic practice.
The good ergonomic practice is Sam using a power screwdriver to avoid repetitive motions, which helps prevent repetitive strain injuries. Good ergonomics also emphasize maintaining proper posture and making adjustments to workstations, such as the monitor position, to reduce strain.
Explanation:The statement that indicates good ergonomic practice is: Sam uses a power screwdriver to avoid repetitive motions. Good ergonomics involve the design of equipment and workspaces to fit the user's needs, enhance comfort, and prevent strain or injury. Taking measures such as using a power screwdriver can minimize the risk of repetitive strain injuries, which are common in occupations that require repetitive tasks.
Good ergonomic practices also include maintaining good posture by ensuring the center of gravity lies directly above the pivot point in the hips to avoid back strain and damage to disks. This helps address the issue that most people now spend several hours a year sitting still, often in front of a screen, which can lead to poor posture and associated health problems.
For someone like Therese, who is squinting at a computer monitor, ergonomic adjustments might include increasing text size or improving the monitor's position to reduce eye strain. Lastly, sitting in the same position for long periods, as Gina does, is a poor ergonomic practice that can lead to discomfort and long-term musculoskeletal issues.
In the study of human evolution, scientists define modern in terms of: a designated time frame between the upper and lower paleolithic. traits like large browridges, large nasal sinuses, and a large masticatory complex. a series of anatomical traits that distinguish cro-magnon features from neandertals. a series of distinctive anatomical traits that contrast with archaic traits from earlier hominins.
Fertilizer runoff from a farm is an example of which of the following?
Nonpoint source pollution (NPF)
Fertilizer runoff from a farm is an example of nonpoint source pollution. NPF emanate from many diffuse sources such as land runoff, precipitation, and drainage. Nonpoint source pollution includes excess fertilizers, salts from irrigation and toxic chemicals from urban runoff. When runoff moves, it absorbs and transports pollutants into water bodies such lakes, rivers and ground waters.
Katie has been diagnosed with breast cancer and is under significant stress. she is undergoing a series of chemotherapy treatments. according to hans selye, katie is currently in the _____ stage of the general adaptation syndrome (gas). exhaustion acceptance resistance deferred optimism
Katie, undergoing chemotherapy for breast cancer, is in the stage of exhaustion of Hans Selye's general adaptation syndrome, where her body's ability to resist stress is depleted.
According to Hans Selye's general adaptation syndrome (GAS), Katie, who has been diagnosed with breast cancer and is undergoing chemotherapy, is currently in the stage of exhaustion. In Selye's GAS model, stress affects an individual in three steps: alarm, resistance, and exhaustion. The stage of exhaustion is the third stage of the GAS, during which the body's ability to resist stress becomes depleted, potentially leading to illness, disease, or even death. Because Katie is experiencing ongoing stress from her diagnosis and treatments, her prolonged exposure to stress fits the characteristic of this final stage.
Katie has been diagnosed with breast cancer and is under significant stress. she is undergoing a series of chemotherapy treatments. according to hans selye, katie is currently in the A) exhaustion stage of the general adaptation syndrome (gas).
Hans Selye's general adaptation syndrome (GAS) consists of three stages:
Alarm Reaction: This is the initial stage where the body reacts to a stressor with a fight-or-flight response. The stress levels are high, and the body releases adrenaline and other stress hormones to prepare for immediate action.
Stage of Resistance: In this stage, the body adapts to the ongoing stressor. The initial shock and intense response diminish, but the body remains on high alert to deal with the persistent stress. Coping mechanisms and resistance to the stressor are maximized.
Stage of Exhaustion: If the stressor persists for a prolonged period, the body's resources become depleted. The sustained effort to combat the stress leads to physical and mental exhaustion. During this stage, the individual becomes especially vulnerable to illness and disease due to the weakened immune system and depleted energy reserves.
Given Katie’s prolonged exposure to the severe stress of breast cancer and chemotherapy, she is most likely in the stage of exhaustion. This stage is characterized by significant physical and mental fatigue, increased vulnerability to illness and possible severe health complications as the body's ability to manage stress diminishes.
Which type of reproduction is MOST advantageous for the production of a wide variety of organisms in an individual species?
a) budding
b) fragmentation
c) binary fission
d) sexual reproduction
The two processes currently bringing the most profound change to the developed democracies are ________.
An increase in distance between two objects will _______ the gravitational force between them. An increase in the total mass of two objects will _______ the gravitational force between them. A. decrease; decrease B. decrease; increase C. increase; decrease D. increase; increase
The answers would be: decrease, increase.
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Describe one type of molecular evidence that can be used to determine the genetic relatedness of bacterial strains isolated from naturally occurring populations
One type of use of molecular evolutionary evidence to determine the relatedness between the bacteria strains is use of molecular clock. Molecular clock determines the degree of similarity and difference in the genetic makeup of the organisms by comparing the sequences of nucleotides in their DNA or amino acids in their proteins.
DNA sequencing and analysis, in particular of the genomic sequence and the 16S rRNA gene, can be used to determine the genetic relatedness of bacterial strains. Additional evidence can come from detection of information exchange, such as the sharing of antibiotic resistance genes.
Explanation:One type of molecular evidence used to determine the genetic relatedness of bacterial strains isolated from naturally occurring populations is through DNA sequencing, which forms the basis of molecular systematics. By analyzing the genomic sequence of a bacterium's DNA and comparing it to other sequences, scientists can identify similarities and differences that suggest how closely related different strains might be.
An example of this was when the genomic sequence of the DNA extracted from the samples taken from 14th-century skeletons was constructed and compared to that of modern strains of the bacteria Y. pestis and Y. enterocolitica, and a close match was found. There's also evidence from molecular comparisons that two very closely related organisms can appear unrelated if mutations occurred.
Another valuable tool is the comparison of the 16S rRNA gene sequences. The 16S rRNA gene is highly conserved among different species of bacteria, making it an ideal target for identifying and comparing bacterial strains. For instance, a gene sequence of 16S rRNA extracted from the samples taken from 14th-century skeletons were compared to that of modern strains of Y. pestis, again resulting in a close match.
Lastly, it is also possible to identify evidence of information exchange between different strains of bacteria, such as the sharing of antibiotic resistance genes. For example, the MCR-1 gene that confers colistin resistance was found in a plasmid from E. coli, suggesting that this resistance could have been acquired from another strain.
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Biological evolution in humans and in other organisms is evidenced by:
Michigan is part of the Great Lakes region in the U.S. The Great Lakes ecosystem contains various types of habitats: forests, marshes, wetlands, and dune communities. These communities allow for more than 3,500 species of plants and animals to inhabit the basin. The many varieties of mammals, amphibians, reptiles, birds, and fish make the Great Lakes basin a unique and complicated ecosystem. The picture above shows one complex food web you might find within the Great Lakes. Students in biology class used a computer simulation to determine the effects of biodiversity on the stability of a food web. Their research question was: How does food web complexity affect the biodiversity of an ecosystem? Student groups were able to manipulate one variable in the food web. One student group added an herbicide to the waters during their simulation. The herbicide was the result of farming in the area. Based on the students' modification of the simulation, what would you expect to happen to this food web? A) We would expect a decline of any filter feeders that relied on unicellular algae for food. B) The first level consumers, the herbivores such as the mussels and water fleas, would die out. C) An overall collapse of the food web as the herbicide would kill all producers and they are the base of any food web. D) If the herbicide was toxic to algae, we would expect a collapse of the food web. If toxic only to plants, we would expect a decrease in some primary consumers.
Answer:
Option C, An overall collapse of the food web as the herbicide would kill all producers and they are the base of any food web
Explanation:
Addition of herbicide is not only harmful to the producers with in the lakes but all associated living organism. Herbicides will kill the producers and If the producers will die then the first level consumers will also die due to lack of food. Secondary consumers dependent on primary consumers will also die as they will not get sufficient food. Like wise, the tertiary consumers will also die. In this way the overall food web will collapse when herbicides are added to lake.
Hence, option C is correct.
Jack is eating a diet that will help him build muscle, so he eats a diet high in this. Before a race, Ruth drinks a beverage full of this biomolecule to get energy. These molecules in olive oil will help Ruth’s body store long-term energy. Elizabeth has been advised to go for genetic screening to detect any abnormalities in her unborn child. Pairs nucleic acids arrowBoth carbohydrates arrowBoth fats arrowBoth proteins arrowBoth
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How are meiosis and mitosis different?
A. Only meiosis results in a reduction in chromosome number.
B. Chromatids form only during the process of meiosis.
C. Mitosis produces haploid cells, while meiosis produces diploid cells.
D. Cells go through telophase in mitosis, but in meiosis, they do not.
The correct option is A. Only meiosis results in a reduction in chromosome number.
A. Only meiosis results in a reduction in chromosome number. This statement is true. Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four haploid cells. This is essential for sexual reproduction, as it restores the diploid number of chromosomes in the offspring when the haploid gametes fuse during fertilization. Mitosis, on the other hand, is a type of cell division that results in two diploid daughter cells, each with the same number of chromosomes as the parent cell.
The other incorrect options are
B. Chromatids form only during the process of meiosis. This statement is false. Chromatids, which are replicated copies of chromosomes, are formed during the S phase of the cell cycle, which occurs before both mitosis and meiosis. Therefore, chromatids form during the interphase preceding both types of cell division.
C. Mitosis produces haploid cells, while meiosis produces diploid cells. This statement is false. It is actually the other way around. Mitosis produces diploid cells, while meiosis produces haploid cells.
D. Cells go through telophase in mitosis, but in meiosis, they do not. This statement is false. Telophase is a stage in both mitosis and meiosis. In mitosis, telophase occurs once, after which cytokinesis follows, resulting in two separate daughter cells. In meiosis, telophase occurs twice: once after meiosis I (followed by cytokinesis, resulting in two cells, each with two chromatids per chromosome) and again after meiosis II (followed by cytokinesis, resulting in four haploid cells).
Why must cholesterol, although lipid-soluble, cross most membranes by means of receptor-mediated endocytosis or transporters? propose a mechanism for co-transport of cholesterol through a plasma membrane?
Cholesterol, despite being lipid-soluble, must often cross membranes through receptor-mediated endocytosis or transporters because lipid bilayers of cellular membranes are impermeable to most large molecules, including cholesterol. This is essential for maintaining cellular functions and cholesterol homeostasis. The co-transport mechanism of cholesterol through a plasma membrane involves partnership with specific proteins and possibly the formation of lipoprotein complexes.
Receptor-mediated endocytosis is a cellular process where specific substances are internalized into the cell through receptors on the cell surface. Cholesterol, often associated with low-density lipoprotein (LDL), is one such substance that is too large to passively diffuse across the lipid bilayer and must enter the cell via endocytosis. Defective or missing LDL receptors can lead to high blood cholesterol levels, as seen in familial hypercholesterolemia. Moreover, cholesterol transport across the membrane is also facilitated by proteins that recognize and shuttle these molecules. For instance, the START domain proteins and the OSBP play key roles in vesicular and non-vesicular transport mechanisms. These proteins help regulate the exchange of cholesterol and phosphatidylinositol 4-phosphate (PI(4)P) between various cellular locations, ensuring proper cholesterol distribution and function within the cell.
Investment spending increases during periods of recession.
a. True
b. False
Which of the following is the best example of an ecosystem? A. a school of sunfish B. bees and wasps around a group of purple cornflowers C. a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore D. a warm, humid climate with plenty of rainfall
The following is best example of an ecosystem is a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore. Thus, option "C" is correct.
What is an ecosystem?An ecosystem is a community or group of living organisms that live in and interact with each other in a specific environment.
A large ecosystem where this is a high genetic variability that gives the populations within the ecosystem resilience against disturbances. There are enough alleles within the genetic pool of a large and diverse ecosystem to withstand disturbance regimes.
Thus, option "C" is correct.
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C. a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore.
A pond, sandy shoreline, a colony of mockingbirds, and a few bullfrogs constitute Option C, which is a full ecosystem since it includes a variety of living things interacting with their natural surroundings. The pond and sandy shoreline stand symbolically for the abiotic elements, while the mockingbirds and bullfrogs symbolise the biotic ones. The organisms in this ecosystem depend on one another for basic necessities including food, shelter, and procreation. Bullfrogs depend on the pond for habitat and reproduction, whereas mockingbirds may eat insects that are nearby. The pond and sandy coastline also supply the abiotic elements—water, nutrients, and sunlight—that are essential for life to flourish. All things considered, this illustration shows the intricate relationships that exist between living things and their surroundings, emphasising the interdependence and harmony of ecosystems.
In the 1940's, while studying genetic inheritance in corn plants, Barbara McClintock discovered that segments of DNA could move from one place to another on a chromosome and even move from one chromosome to another. The moving segments cause genetic variation and some changes are suspected to cause such genetic disorders as breast cancer and leukemia. McClintock received a Nobel Prize for her work in genetics. These movable segments are now called A) DNA sequencing. B) recombinant DNA. C) transposons or jumping genes. D) transgenic or McClintock plasmids.
The correct answer is option (C) transposons or jumping genes.
Barbara McClintock was an american cytogeneticist. In 1940s, she discovered the phenomenon of transposition brought about by the mobile genetic elements or jumping genes or the transposable elements. These jumping genes refers to a sequence of DNA which can change its position in the genome or the genetic constitution of an organism. She discovered these jumping genes in the Maize for the first time and received the nobel prize in 1983.
Jumping genes form a major portion of the eukaryotic genome. They are often responsible for mutations and associated with the duplication of the genetic material. They also cause the structural changes in the chromosomes like inversion, deletion and translocation which are called the chromosomal aberrations.
which characteristic is shared by all prokaryotes and eukaryotes
The characteristics which are shared by all prokaryotes and eukaryotes are the presence of plasma membrane, ribosomes, cytoplasm, and the genetic material either DNA or RNA.
What do you mean by Prokaryotes?Prokaryotes may be defined as those single-celled organisms that lack a well-defined nucleus and other cell organelles.
The plasma membrane is made up of a phospholipid layer that envelops the cell and protects it from the external environment. Ribosomes are the site of protein synthesis in both prokaryotes and eukaryotes.
Cytoplasm plays a functional role in the metabolic processes, while genetic material stores genetic information of all organisms.
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what is the significance of the demographic transition in studies of human population aroumd the world?
The demographic transition is pivotal in understanding population changes as it links shifts in birth and death rates to economic development and advances in health and technology. It aids in recognizing patterns of growth and decline in populations across the globe.
The concept of demographic transition is highly significant in studies of human population because it offers insight into the changes that a population undergoes from high rates of births and deaths to lower rates of both as a society becomes more industrialized. This transition, consisting of four to five stages, illustrates shifts from rapid population growth to stability or decline. It emphasizes the transformative impact of economic development and technological advances on population dynamics. Further, understanding demographic transition is vital for recognizing patterns of demographic momentum, where the age structure of a population influences its growth rate. This theory, despite some contestation, has been influential in the study of population growth and its relation to technological advancement and economic development.
How are all animals alike as heterotrophs
Answer:
All animals alike as heterotrophs beacuse animals cannot prepare their own food.
Explanation:
Heterotrophs may be defined as the organisms that will depend upon plants or other animals for their food. They are unable to synthesize their own food.
All animals are heterotrophs as they depends on the other organisms for the production of food. All animals are also referred as consumers.
A blood pressure reading of 120/80 Question 2 options: a. indicates a diastolic blood prssure of 120. b. is an indication of hypertension in a resting adult. c. indicates a systolic blood pressure of 120. d. is determined by using a sphygmomanometer to measure blood pressure in the veins.
A blood pressure reading of 120/80 indicates a systolic blood pressure of 120 and is not an indication of hypertension. A sphygmomanometer is used to measure this in arteries, not veins.
Explanation:A blood pressure reading of 120/80 indeed indicates a systolic blood pressure of 120. This is expressed as the 'top' number in the reading. The 'bottom' number, 80 in this case, corresponds to the diastolic blood pressure. These two figures represent arterial pressure during the heart's contraction and relaxation phases, respectively. Such a blood pressure reading is not an indication of hypertension in a resting adult but rather falls within what is typically viewed as a healthy range. The reading is determined using a specific device, which is referred to as a sphygmomanometer, but it measures blood pressure in the arteries, not the veins.
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a teacher says she has identified an organism with these characteristics eukaryotic brainly
Which of these is the longest-lasting sink for carbon dioxide?
a. plant tissues and cellulose (the "woody" parts of plants)
b. the atmosphere
c. air bubbles within glacial ice
d. limestones?
Answer:
The answer is: d. limestones
Explanation:
Carbon that is naturally deposited in a certain deposit in the form of solid carbonate. This is a process characterized by the fact that it occurs slowly and is the main responsible for the accumulation of the so-called limestone. Silicates react with carbonic acid in groundwater, it reacts and dissolves calcium, magnesium, and other alkalis. When an organism dies, its remains are deposited as sediment, thus transforming into limestone.
While handling preserved biological specimens what safety equipment should you be using ?
A- fire blanket
B - thermal gloves
C- eye wash station
D - latex gloves
During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. This behavior is probably due to what
A mountain lion temporarily leaves its usual hunting territory to drink from a farm pond due to a change in an abiotic factor in its environment.
An ecosystem is composed of two major components, biotic or living components and abiotic or nonliving components.Biotic factors include animals, plants, decomposers, etc., whereas abiotic factors include air, water, sunlight, rainfall, soil, etc.Abiotic factors are often limiting factors that restrict the survival of a population, thereby individuals (in this case, the mountain lion) eventually migrate to other areas to find available resources (i.e., water).In conclusion, a mountain lion temporarily leaves its usual hunting territory to drink from a farm pond due to a change in an abiotic factor in its environment.
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13. Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). If the frequency of the r allele is 15%, and the frequency of the R allele is 85%, what will be the frequency of the RR genotype, assuming evolution is not occurring?
Answer:
Frequency of the RR genotype [tex]= 72.25[/tex]
Explanation:
Here Hardy Weinberg's equation would be applicable as it is assumed that evolution is not occurring.
As per Hardy Weinberg's equation, the frequency of recessive allele is represented by "q"
Here, [tex]q = 0.15[/tex]
And the frequency of dominant allele is represented by "p"
Here, [tex]p = 0.85[/tex]
So the frequency of the RR genotype, i,e the homozygous dominant genotype is represented by
[tex]p^{2} = 0.85^2\\= 0.7225\\= 72.25[/tex]
Which layer of Earth is made up partly of crust and partly of mantle material
Lithosphere
Lithosphere is the outermost layer of earth and it is composed of crust and upper mantle portion of the earth. Lithosphere rests on a layer called asthenosphere. Lithosphere forms the hard and rigid surface of the earth. The two types of lithosphere are oceanic lithosphere and continental lithosphereAnswer:
Lithosphere!!!
Explanation: