The correct answer is reduction in tooth size.
The anatomy of the foot and pelvis are the feature of Australopithecus afarensis that is used to definitively classify this species as a hominin.
AustralopithecinesAustralopithecines are an adaptive radiation of early hominins, all of which were to some extent bipedal, had brains that were only slightly larger than those of apes, and had adaptations to a diet that included at least occasionally hard-to-chew items. They have been identified through research on perhaps ten species that lived in central, eastern, and southern Africa between 4.2 million and 1.0 million years ago. Understanding australopithecines is essential to comprehending not only the diversity of early hominins but also the origins of Homo. Our genus Homo probably originated from this radiation, albeit we are unsure from which species.
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What 2 reflex actions when we swallow steer the food into the esophagus?
The esophagus, a muscular tube with the ability to collapse, connects the pharynx to the stomach.
What is Esophagus?It is anterior to the vertebral column and posterior to the trachea as it descends. It empties into the stomach after passing through the esophageal hiatus, a hole in the diaphragm.
In order to maintain the lining moist and well lubricated to facilitate the passage of food, the mucosa possesses glands that generate mucus. Food enters and exits the esophagus under the control of the upper and lower esophageal sphincters.
The esophagogastric junction is home to the lower esophageal sphincter, which is also known as the cardiac sphincter.
Therefore, The esophagus, a muscular tube with the ability to collapse, connects the pharynx to the stomach.
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hairlike processes that project from epithelial cells; help propel mucus, dust particles, and other foreign substances from the respiratory tract
It is true that, Epithelial cells form hairlike processes that help expel mucus, dust, and other foreign items from the respiratory tract.
Cilia, which resemble hairs, line the mucous membrane and transport mucus-trapped particles outside the nose. The tissue that lines the nasal cavity moistens, warms, and purifies the air that is inhaled. On the outside of airway cells, cilia are movable, tiny projections that resemble fingers.
The cilia that line the airways aid in raising and expelling mucus from the lungs. One of the defense systems of the respiratory system is represented by cilia, small muscular projections that resemble hairs on the cells lining the airway. A liquid mucus film that coats the airways is propelled by cilia.
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Correct Question:
State true or false: hairlike processes that project from epithelial cells; help propel mucus, dust particles, and other foreign substances from the respiratory tract.
What happened in the F2 generation of Mendel's crosses?
Answer:
from the F1 generation the cross pollination of two parent which contain all purple flower.In the F2 generation from self pollination of F1 plants and contain 75% purple flower and 25% white flowers
The diagram represents three section of a cell membrane showing three different methods involved in the transport of various molecules across the membrane
Methods A and B are classified as a methods of passive transport because they do not require
1) ATP
2) carbon dioxide
3) light
40 DNA
Answer:
1
Explanation:
5
Explain what happens to the percentage stomatal opening when plant roots are partially exposed to
water compared to when they are fully exposed to water. Justify your answer using the graph above.
Through their stomata, plants transpire their water in the form of vapor or gas. Stomatal transpiration, or between 50 and 90 percent of all transpiration, loses the most water.
How do stomata respond to water status?
We still don't have a complete mechanistic knowledge of how stomatal responses to humidity, soil moisture, and other factors that affect plant water status affect photosynthesis, productivity, water production, ecohydrology, and climate forcing. Here, I go over earlier and more current developments in stomatal water interactions. The synthesis of abscisic acid in leaves may play a role in the metabolically mediated response to leaf water status in stomatal responses to evaporative demand and soil drought. Humidity, light, and temperature responses may also be influenced by additional speculative mechanisms involving vapor and heat transfer within leaves, although these mechanisms need more theoretical development and experimental verification..
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RNA that has hydrogen bonded to itself forms a promoter sequence. terminator sequence. termination protein. stem loop.
Answer:
yes
Explanation:
yes RNA that has hydrogen bonded to itself forms a promoter and Terminator sequence
Would a bird enthusiast be more likely to hold an owl-watching
Vigil at night or during the day?
Answer:
A bird enthusiast would be more likely to hold an owl-watching vigil at night, as owls are typically active and hunting during this time. They are nocturnal birds, and they can usually be seen and heard hunting at night, so it would be the best time for an owl-watching vigil
Owl-watching at night.
Who observed the variation of organism in Gala?
Charles Darwin observed the variation of organisms in the Galápagos Islands during his voyage on the HMS Beagle in 1835.
Charles Darwin's observations of the variation of organisms in the Galápagos Islands, greatly influenced his theory of evolution by natural selection. While exploring the various islands in the Galapagos, Darwin noticed that the animals and plants on each island had slight differences from the same species on other islands.
This led him to conclude that the differences were caused by the different environments on each island, and that this could lead to the evolution of new species over time. This observation was a major factor in the development of Darwin's theory of evolution by natural selection, which has since become one of the most widely accepted theories in the field of biology.
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Classify make a table with two columns-labeled haploid and diploid-and assign each of the following structures from the pine life cycle to the appropriate column: pollen tube, seed cone, embryo, ovule, and seeding
The haploid cells are the pollen tube, seed cone, and the seedling, while the diploid cells are the embryo and the ovule, and the haploid has the half set of the genetic contents while the diploid has the double set.
What is the significance of the haploid cells?The haploid cells are important as they are the gametes that have the capacity to form the zygote, and they can be either sperm or an ovule. So the haploid cells, which are the male and female gametes, combine to make the diploid cells.
Hence, the haploid cells are the pollen tube, seed cone, and the seedling, while the diploid cells are the embryo and the ovule, and the haploid has the half set of the genetic contents while the diploid has the double set.
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Draw the structure of a simple autonomous DNA transposon and answer the following:
A. What is the origin of each component during cut-and-paste transposition?
B. What is the function of each component during cut-and-paste transposition?
The origin of each component during cut-and-paste transposition is transposon and transposase enzyme. the function of each component during cut-and-paste transposition is to move gene from one location to another within the genome and to catalyzes the reactions that lead to the movement of the transposon.
The transposon is the genetic element that is moved from one location to another within the genome. The transposase enzyme is the enzyme that catalyzes the reactions that lead to the movement of the transposon. It binds to the transposon and recognizes the specific sequences that mark the boundaries of the element, and then catalyzes the reactions that lead to the excision and integration of the transposon into a new location in the genome.
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What are the general climate conditions in much of eastern europe?
Climatic conditions in most of eastern Europe are subarctic climates.
What is climate?Climate is the habit and character of the weather that occurs in a place or area. The time period used as a reference for determining the average climate is 30 years. The constituent elements of climate are the same as the weather.
In Northern Europe, Eastern Europe, the Alps, and several other highlands have a subarctic climate. Subarctic climates are climates characterized by long, usually very cold winters, and short, cool to mild summers.
In winter, subarctic climates have short days and very long nights. Winter in subarctic climate areas at night can reach extreme temperatures of up to -20 to -50° Celsius.
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Ms. Green's biology students were studying cellular respiration. Using baking yeast to test the rate of fermentation, student groups mixed yeast with different manipulated variables. The groups used the height of the carbon dioxide bubbles produced in a test tube to determine which variable(s) produced the highest rate of fermentation.
Ms. Green's biology students were studying cellular respiration. Using baking yeast to test the rate of fermentation, student groups mixed yeast with different manipulated variables. The groups used the height of the carbon dioxide bubbles produced in a test tube to determine which variable(s) produced the highest rate of fermentation. Students hypothesized that adding lactose to a sixth test tube would produce the greatest amount of carbon dioxide.
Respiration is a process of overhauling complex organic molecules to produce energy. One type of respiration without oxygen, namely anaerobic respiration, will break down glucose to release stored energy. Anaerobic respiration occurs when the body needs energy quickly.
An example of anaerobic respiration alcohol fermentation using yeast. When approached, enzymes in yeast will analyze it with starch and sugar so that a decarboxylation process occurs when pyruvic acid from glucolysis breaks down carbon dioxide and carbonate groups to form acetaldehyde. Energy and carbon dioxide will be formed after acetyldehyth is reduced. Therefore the addition of lactose will produce the largest amount of carbon dioxide because lactose is a sugar molecule that is a food source for yeast.
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If 5 waves passes through a certain point in 1 second the frequency of this wave is
The frequency of the wave as he passes through a certain point is 5 waves per seconds.
What is frequency?Frequency is the amount of complete cycle completed by a wave in one seconds.
To calculate the frequency of the wave, we use the formula below.
Formula:
f = n/t..................... Equation 1Where:
f = Frequencyn = Number of wavet = Time in secondsFrom the question,
Given:
n = 5 wavest = 1Substitute these values into equation 1
f = 5/1f = 5 waves per secondsHence, the frequency of the wave is 5 waves per seconds.
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The frequency of this wave is 5 waves per second, or 5 hertz (Hz).
What is the frequency of wave, f ?This refers to the number of waves passing a point in a second. The unit of frequency is measured in hertz (Hz). One hertz is equal to one wave per second.
To calculate the wavelength and speed of a wave, these can be used to find the frequency of a wave:
f = v λ
where
λ = the wavelength in meters
v = the speed of the wave in m/s.
This also gives the frequency of the wave in Hertz.
From the question:
f = 5
Hence, If 5 waves passes through a certain point in 1 second the frequency of this wave is 5 hertz (Hz).
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OtWhich part of the cell theory did Schleiden help establish with his observation of plant material?
O A. Cells were named by Robert Hooke.
OB. Nonliving things are made up of cells.
OC. All cells come from existing cells.
O D. All organisms are made of one or more cells.
Answer:
C. All cells come from existing cells.
Explanation:
Schleiden observed plant material and concluded that all plant tissue was made up of cells, which helped to establish the cell theory that all cells come from existing cells.
what is the term for inanimate objects that harbor microorganisms that contribute to environmental contamination?
The term fomite inanimate objects harbor microorganisms that contribute to environmental contamination.
Inanimate items that are capable of carrying and spreading illness and infectious agents are referred to as fomites. It's possible to refer to fomites as passive vectors as well. There is a vast variety of commonplace items that have the potential to become fomites if they come into touch with infectious agents such as germs, viruses, bacteria, or fungi.
Certain infectious diseases are more likely to be passed on via fomites than others. However, the likelihood of bacteria on a fomite being able to successfully transmit to a human is contingent upon a number of conditions.
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Which agricultural inventions prompted the Sung dynasty’s population growth?
Select all that apply.
Responses
New irrigation techniques were used.New irrigation techniques were used.
New strains of rice were grown.New strains of rice were grown.
New methods for breeding livestock were used.New methods for breeding livestock were used.
New strains of wheat were grown.
In addition to early ripening and drought-resistant types, farmers also created rice that was suitable for brewing and other specialized uses.
What is the procedure for brewing?Malting, milling, mashing, extract separation, hop addition and boiling, hop removal and precipitates removal, cooling and aeration, fermentation, yeast separation from young beer, age, and maturation are all steps in the brewing of beer.
What does the word "brew" actually mean?A transitive verb that means to steep, boil, and ferment (beer, ale, etc.) or to infuse and ferment. It also means to foment.
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all animals are all made of the same basic chemicals, these chemicals are called
Answer:
carbon
Explanation:
Carbon forms bonds with other atoms which gives flexibility that biomolecules can use to make DNA and RNA causing to make the building blocks of life.
What were the original inhabitants of australia called?
The original inhabitants of Australia are known as Indigenous Australians. They have a rich culture and history that stretches back more than 60,000 years. Indigenous Australians are made up of many different groups, each with their own unique language, customs, and traditions. They were hunter-gatherers and had complex societies, spiritual beliefs, and trading networks. They have been the custodians of the land and the culture for millennia and continue to play a significant role in the country's history, culture and identity.
Match the hormones with their roles in breastfeeding: Mammary gland growth
Milk production and storage
Milk let-down
Mammary gland shrinkage
=Prolactin
= Oxytocin
= Estrogens
= Progesterone
Mammary gland growth - estrogen
Milk production and storage - prolactin
Milk letdown - oxytocin
Mammary gland shrinkage - progesterone
When a baby suckles, it stimulates tiny nerves. This releases two of her hormones, prolactin, and oxytocin, into the bloodstream. Prolactin promotes milk production, and oxytocin promotes milk production. Breast milk is then released or expelled from the nipple. Estrogen is essential for MG growth, both in pubertal ductal dilatation and in alveolar development during pregnancy. Breast tissue prepared for milk production shrinks and loses its shape. Because of progesterone.
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which part of your brain is involved in your motivation?
The anterior cingulate cortex as well as the dorsolateral prefrontal cortex are the main neural circuits related to the regulation of motivation.
Motivation can be passed into the three sub processes i.e a process of regulating motivation, maintaining motivation as well as generating motivation.
A tentative neuroscientific model of motivational processes which consists of three distinct but continuous sub processes, namely value-based decision-making, reward-driven approach, and goal-directed control. This process will recruits the ventral striatum (reward area) in which basic stimulus-action association is formed, and it is classified as an automatic motivation to which relatively less attention is assigned. The neuroscientific model of motivational process suggests several educational implications like; maintenance, generation, and regulation of motivation to learn in the learning environment.
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Which type of scientific statement is defined as a possible explanation or answer to a scientific question that is based on prior knowledge or resear?
Answer: A scientific hypothesis is a type of scientific statement that is defined as a possible explanation or answer to a scientific question that is based on prior knowledge or research. It is a proposed explanation for an observed phenomenon, and it must be tested and verified through experimentation and observation.
Mitosis is a kind of
A. cell division
OB. nuclear division
OC. cell addition
O D. cell respiration
Answer:
A. Cell division
Explanation:
What is mitosis? Mitosis is a type of "cell division" in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical to itself.
thank you very much thank you
Answer: D
Explanation:
cuz i took the test
If the original parent cell has 64 chromosomes, how many chromosomes will each cell have after the second meiotic division
Answer:
the correct answer is 32 because it splits evenly
Answer:
At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.
Explanation:
conductive activity in a neuron generally causes it to secrete
Conductive activity in a neuron generally causes to secrete a specific neurotransmitter which is either inhibits its target.
Neurotransmitters is defined as to relay their messages by traveling between the cells and attaching to a specific receptors on target cells. Each neurotransmitter attaches with a different receptor. For example, dopamine molecules which is attached to the dopamine receptors. Release of neurotransmitters responses to the conductive activity. They are also known as the soma, which serves as the neuron's control center, since it contains the nucleus, and it also conducts electrical signals to the axon. Cell body will initiate the signal sometimes.
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Why is visualization not sufficient to properly identify bacteria?
A. Bacteria have a limited set of shapes.
B. Identification is only needed in clinical specimens.
C. Many unrelated bacteria can share the same shape.
D. Bacteria have a limited set of shapes and many unrelated bacteria share the same shape.
E. Not all bacteria can be seen with a light microscope.
Visualization not sufficient to properly identify bacteria the correct option is (D). Bacteria have a limited set of shapes and many unrelated bacteria share the same shape.
Some bacteria, known as vibrio, have comma- or rod-like shapes; others might have spiral or tightly wound shapes, known as spirilla or spirochaetes. A few more uncommon shapes, including microorganisms in the form of stars, have been described.
Numerous bacterial species only exist as solitary cells, while others create distinctive associations. For example, Neisseria forms diploids (pairs), streptococci form chains, and staphylococci cluster into "bunch of grapes"-like clusters.
Soil, water, acidic hot springs, radioactive waste, and the deep biosphere of the Earth's crust are all home to bacteria. Through the recycling of nutrients, such as the fixation of nitrogen from the atmosphere, bacteria are essential at many phases of the nutrition cycle. The decomposition of dead corpses is a part of the nutrient cycle; bacteria are in charge of the putrefaction phase of this process.
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PLS HELPP I DONT KNOW WHAT TO DO!!
Plasmodial slime mold is an example of a multinucleated cell.a. Trueb. False
Plasmodial slime mold is an example of a multinucleated cell. It can be referred to as "one huge cytoplasmic mass with many nuclei" as seen to the right.
What are slime molds classified as?Slime molds are classified in the Kingdom Protista (the Protists), despite many years of having been classified as fungi, in the class Myxomycetes. This change in classification resulted from research that yielded new information about their biology and phylogeny.
Why are Plasmodial slime mold not multicellular?Plasmodium slime molds are unicellular when there is the availability of food. However, when the nutrients become scarce in the environment, these single-celled slime molds congregate to form a body and move around in search of food as the congregate form can detect airborne chemicals.
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Some proteins are destined to stay in the cell, while others are to leave the cell (secretion).
Are these two types of proteins produced in loose ribosomes? Explain.
Both types of protein can be produced by ribosomes, however, proteins that are destined to be secreted are often produced by ribosomes that are attached to the endoplasmic reticulum.
How do cells determine which proteins are destined to stay within the cell and which are to be secreted?Cells determine which proteins are destined to stay within the cell and which are to be secreted through the use of a process called protein sorting. This process occurs during protein synthesis and involves the addition of specific signals or tags to the protein, such as a signal peptide or a transmembrane domain. These signals act as a sort of "address label" that directs the protein to its proper destination within the cell or out of the cell through the secretory pathway. Proteins that are not tagged for secretion will typically remain within the cell and may serve a variety of functions such as enzymes, structural proteins, or regulatory proteins.
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Draw a picture showing PHOTOSYSTEM PS1
Photosystem PS1 is a photosystem found in the thylakoid membranes of chloroplasts in plants and other photosynthetic organisms.
What exactly are photosynthetic organisms?
Photosynthetic organisms are organisms that can produce their own food through the process of photosynthesis. This process involves the use of light energy to convert carbon dioxide and water into glucose (sugar) and oxygen. Photosynthetic organisms include plants, algae, and some bacteria.
Photosystem PS1 is the primary photosystem in plants and other photosynthetic organisms. It is composed of two membrane-bound proteins, called photosystems, that contain light-harvesting complexes and a reaction center. The light-harvesting complexes absorb energy from sunlight and direct it to the reaction center, where it is used to produce ATP and NADPH, the molecules needed for photosynthesis. The products of photosystem PS1 are then used to drive the second photosystem, PS2, which produces the end products of photosynthesis.
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