The statement that is true about the evolution of brain size in the genus Homo is that the brain size has continuously increased from the early humans to the present day humans.
The genus Homo comprises of present day humans, the Homo sapiens and also the extinct species like Homo habilis, Homo erectus, Homo Neanderthalensis.
The first human like being was Homo habilis. They had a brain size of 650-800 centimeter cube(cc).
The next stage in human evolution is Homo erectus who had a brain size of 900 cc.
The third stage was Homo neandarthalensis. Their brain capacity was about 1400 cc.
The final stage in the human evolution is Homo sapiens, the present day humans with a brain capacity of around 1300-1400 cc.
As it is evident from the above statements, the brain size of the genus Homo has continuously increased from the early humans to the present day humans.
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You are looking around the lab and you happen to see fruit flies that have halteres on their legs. how could such a phenotype have resulted?
The fruit flies with a haltered legs is resulted due to homoetic transformation.
Fruit flies also called as Drosophila Melanogaster is considered as model organism for experimental purpose.
Halteres is a pair of club shaped organ that helps in rotation during flight.
Hox genes in Drosophila is responsible for causing homoetic transformation. Eight hox genes are present in most of the insects which are present in chromosome 3.
Hox genes are responsible for the homoetic transformation.
Homoetic transformation is the transformation that occurs in which the fate of the organism is changed to another.
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after the peptide chains shaped for its function it becomes a
Answer:
it becomes a biologically active protein in its native 3D structure.
Which factor is most instrumental to the optimal health and performance of the digestive system?
Adequate sleep is most instrumental to the optimal health and performance of the digestive system.
How sleep affect digestive system ?Stress that affects the intestines can increase as a result of lack of sleep.
Bloating, inflammation, stomach pains, food allergies, and alterations to the gut flora are just a few of the problems that can result from this.
Digestive system :The digestive system is made up of the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus. Salivary glands, the liver, gallbladder, and the pancreas are also included since they produce digestive juices and enzymes that aid the body in breaking down food and liquids.
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How does mining impact the environment?
Mining has a negative impact on the environment by allowing toxic chemicals to harm wildlife and is denoted as option C.
What is Mining?This is referred to as the process in which minerals and other geologic materials are extracted from the earth with the use of special types of equipment.
It is used to extract minerals which are usually in the form of ores from a mine and contains toxic chemicals such as heavy metals e.g lead etc. It impacts the environment by allowing toxic chemicals to harm wildlife as result of sulfuric acid etc which are used to separate minerals from ore and ammonium nitrate which is used in blasting tunnels.
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Goblet cells are found within pseudostratified ciliated columnar epithelium.
a. true
b. false
This is true that goblet cells are found within pseudostratified ciliated columnar epithelium.
Goblet cells are present in the intestinal villi that are responsible for the production of mucin. They are abundant in the large intestine. The cells appear cup-like in appearance. The function of these cells is to prevent the foreign pathogen from infecting the intestine.
Pseudostratified ciliated columnar epithelium is the type of epithelial cell found in the areas where cilia are present. The examples of location include: the respiratory tract, the intestine, etc. Their primary roles are production of mucus and guard the organ from the pathogens.
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_____ refers to any stimulus that interferes with accurately expressing or understanding a message.
Noise is any stimulus that interferes with accurately expressing or understanding a message.
One occupational health risk prevalent is noise in heavy manufacturing and industrial settings and other settings like bars, farms, and cafeterias. The primary health concern is permanent hearing loss. The main concerns in noisy office spaces and schools are interference with expressing or understanding a message, annoyance, and stress.
Noise levels should be limited to acceptable levels to avoid the adverse effects of noise exposure. The most efficient noise reduction strategy is engineering changes to the noise source or the workplace environment. When technology cannot sufficiently control the problem, personal hearing protection is an option. On the other hand, personal protection should be viewed as a stopgap measure while other methods of minimizing noise are investigated and implemented.
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Name the three distinct parts of the trapezius muscle in the cat. what nerve innervates this muscle in the human?
coracotrapezius, acromiotrapezius, and spinotrapezius the three distinct parts of the trapezius muscle in the cat
accessory nerve innervates this muscle in the human
Is the brachial plexus responsible for trapezius innervation?With the exception of the trapezius muscle, which is innervated by the spinal accessory nerve (CN XI), and a patch of skin close to the axilla, which is innervated by the intercostobrachial nerve, the whole upper limb is innervated by the brachial plexus.
The trapezius group and the deltoid group are the two main muscle groups of the cat's back and shoulder. The clavotrapezius inserts on the clavicle after emerging from the middorsal line of the neck and the rear of the head.
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The cerebral cortex has a wrinkled appearance. the _____ lobe lies between the occipital lobe and the central_____.
The cerebral cortex appears to be wrinkly. Between the occipital lobe and the central sulcus is where the parietal lobe is located.
Where is the parietal lobe and what does it do?
One of the larger brain lobes, the parietal lobe is generally situated in the upper rear region of the skull. It interprets sensory data from the environment, primarily pertaining to touch, taste, and temperature. Damage to the parietal lobe may cause sensory impairment.
Where is the central sulcus ?
On the lateral and medial surfaces of the cerebral hemispheres, the central sulcus (also known as the Rolando's sulcus) divides the frontal and parietal lobes.
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The maintenance of constant body temperature would be difficult without the actions of the?
The maintenance of constant body temperature would be difficult without the actions of the apocrine glands. Sweat glands are located in apocrine glands on the skin and eyelid. The armpits, groyne, and region surrounding the breast nipples contain the majority of apocrine glands in the epidermis.
The skin has apocrine glands, which produce odor-producing secretions. Apocrine glands enter the hair follicle and exit at the skin's surface. Apocrine glands grow in regions with a lot of hair follicles, like the scalp, armpits, and groyne. The role of apocrine glands in many species is typically viewed as smell glands involved in the synthesis of pheromones.
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How and why have humans modified the ecosystem in the everglades? what have the intended and unintended consequences been?
The humans modified the ecosystem within the everglades because US Army CORPS of engineers built a levee around Lake Okeechobee, which drained about 1/3 of the Everglades.
Reason :This then cause building canals, and more levees which then create more acreage to grow crops (such as sugarcane).If the wetlands suffer, so do humans will. Humans are a part of the Everglades ecosystem because they depend on it for survival. the shortage of biodiversity caused by invasive plant species, which is in a position to spread throughout new ecosystems, means humans may lose access to good jobs, and safe water supplies for drinking and farming.
Steps for improvement :So, humans are presumably working to improve the Everglades to protect their tourism industries and water supplies. it's intended to restore, protect, and preserve the Everglades by capturing freshwater that flows unaccustomed the ocean and the gulf, and redirect it to areas that require it most for environmental restoration. because the Everglades become a more livable environment, it'll be easier for species to recover or restore along with the land.
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The numbers of some receptors found in the brain may vary during the day by?
The numbers of some receptors found in the brain may vary during the day by 50%.
All organisms have a natural circadian rhythm, which is one of the key distinguishing characteristics of organisms. They are present in most biochemical and molecular processes, from transcription of genes in the cell nucleus to cell cycle regulation, and are heavily involved in physiological and behavioral mechanisms. The central circadian regulatory nucleus in mammals that responds to environmental light-dark cycles is known as the suprachiasmatic nucleus (SCN) and is located in the anterior hypothalamus of the brain. A set of clock genes form a transcription-translation feedback loop at the SCN, a key mechanism of circadian rhythms. Although the SCN is essential for the generation of mammalian biological rhythms, it is not the only nucleus in which clock genes are expressed and regulated.Therefore, the correct answer is 50%.
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termites share an endosymbiotic relationship with the protozoan that live in their gut. which statements are true of this relationship? check all that apply.
Termites have a mutualistic relationship with protozoa that live in their gut. These termites get benefited by the ability of bacterial symbionts that is within the protozoa that digest cellulose.
Endomicrobia is the phylum of bacteria that lives in their gut and wood feeding cockroaches of genus Cryptocercus. These termites thrive on a diet of wood that is remarkable to biological coexistence that involves two organisms.
The symbiotic insect that live in gut breaks down the cellulose that is found in plant cell walls. Termites depends on the protozoa that provide the enzymes that can digest the wood.
Symbionts is an organisms that lives in symbiosis mainly with the smaller member of symbiotic pair.
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Using a combination of aerobic activities to develop overall fitness is known as?
Cross-training is the practice of engaging in multiple aerobic activities to improve overall fitness.
What does the word "aerobic" mean?Aerobic respiration is a process that is only active or alive when oxygen is present. of, pertaining to, or produced by aerobic fermentation caused by aerobes.
What are the advantages of aerobic exercise?Aerobic exercise reduces the risk of various diseases. Obesity, heart disease, high blood pressure, type 2 diabetes, metabolic syndrome, stroke, and specific forms of cancer are among these conditions. Aerobic activities that involve weight-bearing, like walking, help reduce the incidence of osteoporosis.
How long do aerobic exercises need to be?Exercises that are aerobic or "with oxygen" improve cardiovascular fitness. The American Heart Association recommends doing cardiovascular exercise five to seven days a week for at least 30 minutes. After your aerobic exercise, don't forget to stretch and warm up.
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What is function/purpose of RNA
Functions of RNA :
Regulation of gene expressionProtein codingProduction of regulatory moleculesDevelopment of gametes by the ncRNA (non-coding RNA)What controls this ability to connect through the body movements and facial expressions of others?
Our volitional centre, the motor cortex, is where we impose specific facial expressions in order to convey the desired message or because the situation requires it.
What is the purpose of the motor cortex?The motor cortex's main job is to provide signals that control how the body moves. It is anterior to the central sulcus and a portion of the frontal lobe. The primary motor cortex, premotor cortex, and supplementary motor area make up this region.What kinds of motions does the motor cortex regulate?The motor cortex generates signals that are particular to movements and sends them to the muscles via spinal cord circuits and motor neurons to regulate motor behaviour. For the execution of movements to be precise, coordinated muscle activation patterns are required.learn more about motor cortex here
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What term describes the number of plant and animal species present along with the variety of genetic material present in these organisms?
The term "biodiversity" refers to both the variety of genetic material present in these organisms as well as the number of plant and animal species that exist.
What is biodiversity and examples?The diversity of ecosystems, measured by their type and population, in which living things interact with one another and their surroundings is referred to as ecosystem biodiversity. For instance, the Earth has a variety of ecosystems, each with its own unique characteristics, such as deserts, oceans, lakes, plains, and forests.
The diversity of genes present in the living world is referred to as genetic diversity. Various genes and gene expressions exist between and within different species. Additionally, this genetic diversity leads to the diversity of life forms, their physical and biological traits, and, in some cases, phenotypes, depending on how those traits interact with their environment.
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The head of each femur fits into the deep _____________ of each os coxae, helping to stablize the joint.
The head of each femur fits into the deep acetabulum of each os coxae, helping to stabilize the joint.
Acetabulum- The concave surface of the pelvis is known as the acetabulum, sometimes known as the cotyloid cavity. The hip joint is created when the head of the femur connects to the pelvis at the acetabulum.
Os Coxae- The hip bone, also known as the os coxae, innominate bone, pelvic bone, or coxal bone, is a massive, atypical bone that is compressed in the middle and extended above and below. The ilium, ischium, and pubis are its three component components in certain animals, such as humans before puberty.
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Why have more groups within the archaeplastids not developed complex multicellularity?.
More groups within the archaeplastids not developed complex multicellularity due to the fact that evolution is not goal-oriented, complex multicellularity has developed, and each group is successful with its current morphology.
Archaeplastids comprised of many more groups which have no developed multicellularity in complex structures. From fungus to people, every multicellular organism first evolved from a single cell. Before assembling to create multicellular groups, these cells were able to exist on their own for billions of years.
The majority of archaeplastids are single-celled algae. The name “archaeplastid” refers to early plastids. Given that they may have ingested cyanobacteria and acquired chloroplasts through endosymbiosis, this is supported by evolutionary evidence.
In the course of evolution, other eukaryotes may have swallowed up archaeplastids to acquire chloroplasts. Some of the members of this group later developed multicellularity. Therefore, it’s merely a random event that could proceed in any way. The only difference is that Archaeplastida evolved in accordance with their environment and demands.
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The principle of uniformitarianism states that sedimentary rocks are deposited in horizontal layers. True or false?.
The principle of uniformitarianism does not state that sedimentary rocks are deposited in horizontal layers. So the statement is false.
What is the principle of uniformitarianism?Grasp Earth's history requires an understanding of uniformitarianism. However, uniformitarianism was not the dominant idea before 1830. Up until that point, experts believed in catastrophism.
According to catastrophe theory, the landforms that can be seen on Earth's surface, such as mountains, were created by sudden, drastic changes, or catastrophes. Uniformitarianism's detractors may use the term "no-analog alterations" when speaking of historical climates.
According to this theory, there may not be communities or environmental factors present on Earth now that existed in the past. In the end, James Hutton and Charles Lyell's observations and research led to a challenge to the catastrophism theory. Hutton (1726–1797) was a farmer and naturalist from Scotland.
Therefore the statement is false.
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______________________ constitute by far the most abundant type of dna sequences found in the human genome.
Long Interspersed Elements constitute by far the most abundant type of dna sequences found in the human genome.
long interspersed elements) are a group of non-LTR (long terminal repeat) retrotransposons that are widespread in the genome of many eukaryotes. They make up around 21.1% of the mammalian genome.
The most fundamental understanding of a gene or genome is its nucleotide sequence. Without knowing this information, no understanding of genetic function as well as evolution might be comprehensive. It should be the blueprint that includes the instructions for developing an organism.
The autonomous retrotransposon known as Long Interspersed Nuclear Element-1 (LINE-1) creates new genomic insertions by retro transposing an intermediate RNA. To protect DNA and maintain genomic integrity, greatest somatic tissues have tightly suppressed LINE-1 expression.
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Which feature of borrelia burgdorferi would be most influential in leading a microbiologist to perform a negative stain on it, as opposed to any other type? group of answer choices
The feature of borrelia burgdorferi would be most influential in leading a microbiologist to perform a negative stain on it is Spirochetes.
What is spirochete?
Any of a group of spiral-shaped bacteria known as spirochetes (order Spirochaetales), often spelled spirochaetes, some of which are dangerous pathogens for humans and cause illnesses like syphilis, yaws, Lyme disease, and relapsing fever.
Gram-negative, mobile, spiral bacteria with a length of 3 to 500 m (1 m = 0.001 mm) are known as spirochetes. Spirochetes are distinctive in that they have endocellular flagella (axial fibrils, or axial filaments), the number of which varies depending on the species, and ranges from 2 to more than 100 per organism. The axial fibrils wind around the cell body, which is encased in an envelope, each attaching at the opposite end. Typically, spirochetes are found in a watery environment.
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Which population would be most likely to undergo relatively rapid allopatric speciation?
Allopatric speciation would be fastest in the herd of wild horses.
What is allopatric speciation?
When groups of a same species are geographically separated from one another, allopatric speciation takes place. Populations gradually change into new species through a process called speciation.
A herd of wild horses was shipped from Wyoming to a little desert island off the coast of California that had never before had any. After then, no more horses arrive at the island. The new population is tiny (reproductively) and geographically separated from neighboring populations, both of which tend to favor allopatric speciation.
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The inside of the barrel-shaped ldl protein consists of ___________ amino acids, while its outside portions in contact with the blood fluid consist of _____________ amino acids.
The inside of the barrel-shaped LDL protein consists of hydrophobic amino acids, while its outside portions in contact with the blood fluid consist of hydrophilic amino acids.
LDL is a type of lipoprotein, i.e., it contains protein as well as lipid (cholesterol). The full form of LDL is Low Density Lipid. LDL is considered to be the bad cholesterol for the body. It can cause diseases of the heart like heart attack or stroke.
Amino acids are the essential molecule that act as a monomer for the formation of proteins inside the body. They contain an amino group and a carboxylic group attached to the same carbon atom. There are also a hydrogen atom and a variable R group attached to the carbon, also called the alpha carbon.
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During photosynthesis, plants, algae, and certain bacteria remove carbon dioxide (co2) from the air and fix it into chemical compounds such as?
During photosynthesis, plants, algae, and certain bacteria remove carbon dioxide (CO₂) from the air and fix it into chemical compounds such as sugars.
Photosynthesis is the process of synthesizing one's own food using the inorganic raw material like sunlight, water and carbon dioxide to form food in the form of sugars. This process releases water and oxygen as a by-product. Photosynthesis is performed by plants, a few bacteria and fungi.
Sugars are chemically carbohydrates. They can be of two types: (a) simple sugars or monosaccharides like glucose, fructose or galactose, or (b) compound sugars, also called disaccharides like lactose, maltose and sucrose.
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In many cases, even after a consultation, patients become truly alarmed by the symptoms and thus delay taking recommended treatments and tests etc. to _____.
avoid thinking about the illness
In many cases, even after a consultation, patients become truly alarmed by the symptoms and thus delay taking recommended treatments and tests etc. to avoid thinking about the illness
What does treatment delay mean?When a patient doesn't receive the prescribed treatment within the expected time frame, regardless of whether it's a drug, lab test, physical therapy, or another type of treatment, there has been a delay in care.Why do people hesitate to seek medical attention?The most frequent explanation given by individuals who delayed seeking medical care was financial concerns (59%), followed by an unclear reason (22%), an inability to schedule an appointment on time (16%), and a lack of transportation (10%).What are the effects of postponing treatment?Conditions becoming worse. Medical issues may get worse if treatment is put off. If your health issue isn't serious or life-threatening, temporarily postponing surgery might not seem like a big concern. However, tiny issues can swiftly worsen if they aren't appropriately addressed in a timely manner.To lean more about treatment delay visit:
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Chaperone proteins or chaperonins assist in the proper folding of proteins. explain the process.
Chaperone proteins or chaperonins assist in the proper folding of proteins.
Left to right:
1. From one end, a polypeptide that has been unfolded enters the cylinder.
2. When the cap is attached, the cylinder transforms into a hydrophilic environment that facilitates the folding of the polypeptide.
3. The cap is removed, releasing the correctly folded protein.
What is Chaperone (protein)?In molecular biology, molecular chaperones are proteins that aid in the conformational folding or unfolding of large proteins or macromolecular protein complexes.The common goal of all the different molecular chaperone groups is to aid in the appropriate folding of large proteins during or after synthesis as well as during partial denaturation.Chaperones are also involved in protein translocation for proteolysis. The first molecular chaperones to be discovered are assembly-type chaperones that aid in the formation of nucleosomes from folded histones and DNA.One of the primary functions of molecular chaperones is to prevent the buildup of misfolded proteins since heat stress increases the tendency for protein aggregation.The majority of chaperone proteins are hence classified as heat shock proteins.To learn more about chaperone proteins, refer to the following link:
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The cytoplasmic membrane of prokaryotic cells plays a crucial role in transforming energy. this means that the membrane is directly involved in __
The cytoplasmic membrane of prokaryotic cells plays a crucial role in transforming energy. this means that the membrane is directly involved in converting the energy of sunlight or food into ATP.
What is prokaryotic cell?A prokaryotic cell is a type of cell that does not have a true nucleus or membrane-bound organelles. Organisms within the domains Bacteria and Archaea are based on the prokaryotic cell, while all other forms of life are eukaryotic.
What are 3 examples of prokaryotic cells?Prokaryotes are single celled, microscopic entities. They neither have specialized organelles nor a prominent nucleus with a membrane. Examples of prokaryotes include cyanobacteria, E. coli, mycoplasma etc.
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An approach to analyzing the life cycle of an item, beginning with the raw materials from which it is made to its ultimate disposal, is called the:________
Elements that exist as two covalent bonded atoms are called:
How is vinegar naturally produced?
a. by yeasts feeding on the sugar in grains or fruit
b. by yeasts feeding on acetic acid
c. by acetobacter feeding on yeasts
d. by acetobacter feeding on alcohol
Answer:
B i got it right on mine but yet again it could be different for you but I would say B