a distinctive trait linking people from east asia and the americas is: a. shovel-shaped incisors. b. large nose. c. thick, long bones. d. extra muscles on the scapula.
Answers
A distinctive trait of people from East Asia and the Americas is shovel-shaped incisors.
In fact, Amerindians from North, Central, and South America frequently have incisors that resemble a shovel. They are also widespread among the Inuit and Aleut peoples of Northeast Asia and North America, Hungarians, East and Central Asians, and Aleuts (including but not limited to the Inuit peoples of eastern Alaska, arctic Canada and Greenland).
An extensive lingual fossa is surrounded by teeth with shovel-shaped incisors, which have thick marginal ridges. They are more common among Asian racial groups. We sought to determine the prevalence of shovel-shaped incisors in the Turkish population, their distribution by tooth and sex, and the link between SSI and other morphological alterations in this study.
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Related Questions
The diffusion of water across a selectively permeable membrane is called:
A. pinocytosis
B. osmosis
C. osmotic pressure
D. active transport
Answers
The diffusion of water across a selectively permeable membrane is called osmosis. The answer is: B
Osmosis is the diffusion of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane.
Selectively permeable membranes allow only certain molecules or ions to pass through them, while restricting the passage of others. In osmosis, the direction of water flow is determined by the concentration of solutes on either side of the membrane.
The side with a higher concentration of solutes will attract water molecules to that side, resulting in a net movement of water molecules from the side with lower solute concentration to the side with higher solute concentration.
This process continues until the solute concentrations on both sides of the membrane are equal. Osmosis is a passive process and does not require energy input from the cell. Thus, B is the right option.
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what is the first thing that happens when a new cell is produced?
Answers
Answer:
the new cell splits into two cells called daughter cells
aqueous humor is drained through the canal of schlemm.
Answers
Answer:
Whats the question?
Explanation:
mention 5 ways of preventing STI
Answers
Answer:
Use latex condoms every time you have sex.
Avoid sharing towels or underclothing.
Wash before and after intercourse.
Get a vaccination for hepatitis B.
Get tested for HIV.
Explanation:
its common sense
Complete fertilizer label and calculations - Example - how many pounds of phosphorus is in 100# of
bag of 16-4-82
Answers
The three numbers on a fertilizer label, which stand for the percentages by weight of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer, must be taken into account to determine the amount of phosphorus. Compost bag.
In the given example the analysis of the fertilizer is 16-4-82. The first number, 16, refers to the nitrogen (N) ratio. The percentage of Phosphorus (P), represented by the second number, is 4. The percentage of potassium (K), represented by the third number, is 82.
We can use the formula below to determine how much phosphorus is in a 100-pound bag of this fertilizer:
Phosphorus (P) = (percentage of phosphorus / 100) * weight of the bag
Phosphorus (P) = (4 / 100) * 100
Phosphorus (P) = 4 pounds
Hence, there are 4 pounds of phosphorus in a 100-pound bag of the 16-4-82 fertilizer.
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A cell is the basic unit of structure and function in living organisms. What would you call an organism made up of many cells?
Answers
Answer:
Multicellular organism, an organism composed of many cells, which are to varying degrees integrated and independent.
Explanation:
how does an amoeba cell function differently from a human nerve cell?
Answers
Answer:
Answer. It means amoeba has single cell,unicellular. ... Amoeba will functions every thing with the help of that single cell. Humans have many cells which functions multiple functions ( nerve cells,muscle cells,brain cells).
Explanation:
Answer:
Hi E 16
Amoeba are unicellular organisms where as humans are multi cellular organisms
It means amoeba has single cell,unicellular. we has multi cells means more than 2 cells.
Amoeba will functions every thing with the help of that single cell.
Humans have many cells which functions multiple functions (nerve cells,muscle cells, brain cells).
Which scenario correctly describes an interaction between the geosphere, hydrosphere, and atmosphere? A. a volcanic eruption produces carbon dioxide gas which is absorbed by an ocean.
B. Plants are eaten by primary consumers and converted to cellular energy through the process of cellular respiration.
C.Plants use water, carbon dioxide, and the energy from the sun to carry out the process of photosynthesis.
D.Ash from a volcanic eruption eventually settles into a layer in the Arctic where it is covered by new snowfall and is incorporated into a glacier.
Answers
Answer:
C. Plants use water, carbon dioxide, and the energy from the sun to carry out the process of photosynthesis.
Explanation:
In this scenario, the geosphere is represented by the plants, which are rooted in the Earth's surface. The hydrosphere is represented by the water that the plants use, and the atmosphere is represented by the carbon dioxide that the plants take in through photosynthesis. This interaction involves the exchange of matter and energy between the three spheres, with the plants using water, carbon dioxide, and sunlight to produce energy and oxygen.
10 For each neurotransmitter, identify the functional class, and then indicate where the hormone is secreted. Neurotransmitter Functional Class Secretion Site acetylcholine nitric oxide glycine norepinephrine endorphins dopamine GABA serotonin glutamate
Answers
Neurotransmitter Functional Class Secretion Site acetylcholine nitric oxide glycine norepinephrine endorphins dopamine GABA serotonin glutamate are explained in details .
In general , Acetylcholine is an excitatory neurotransmitter that is involved in a variety of functions, including muscle movement, attention, learning, and memory. Nitric oxide is a gaseous neurotransmitter that acts as an inhibitor in the central and peripheral nervous systems. Dopamine is a modulatory neurotransmitter that is involved in a variety of functions, including movement, reward, motivation, and attention.
Also, GABA is an inhibitory neurotransmitter that is widely distributed throughout the central nervous system. Serotonin is a modulatory neurotransmitter that is involved in a wide range of functions, including mood, appetite, sleep, and cognition. Glutamate is an excitatory neurotransmitter that is involved in a variety of functions, including learning and memory.
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Why does the superior part of the esophagus contain skeletal muscle instead of smooth muscle?
Answers
The superior part of the esophagus contains skeletal muscle instead of smooth muscle primarily because of its location and functional requirements.
The esophagus is a muscular tube that connects the throat (pharynx) to the stomach. It passes through different anatomical regions, including the superior part, middle part, and inferior part. The superior part of the esophagus is located in the neck, where it is surrounded by skeletal muscles involved in swallowing and initiating the process of deglutition.
Skeletal muscle is under voluntary control and provides the ability to perform precise and coordinated movements. When we swallow, the skeletal muscles in the superior part of the esophagus contract to initiate the swallowing reflex and propel the food or liquid downward into the rest of the esophagus. This voluntary control allows for conscious control over the initiation and coordination of swallowing.
In contrast, the middle and inferior parts of the esophagus contain smooth muscle, which is under involuntary control. Smooth muscle provides the sustained contractions necessary for peristalsis, the coordinated wave-like muscular contractions that propel food through the esophagus and into the stomach.
Therefore, the presence of skeletal muscle in the superior part of the esophagus is essential for the voluntary control and initiation of swallowing, while the presence of smooth muscle in the rest of the esophagus allows for the involuntary peristaltic contractions required for efficient transport of food to the stomach.
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Why do plants have cell walls and not animal cells?
Answers
Answer:
im not reilly an expert of that, but I think it's because they are not the same reign. plants has evolved differently than animals. the plants works with photosynthesis and it makes sugar but the animals eat and reproduce not like plants
Explanation:
ps I'm not an expert so this is like a hypothesis
Answer:
Cell walls serve two main purposes: protection and the maintenance of turgor. Animal cells could use the protection offered by cell walls, but they do not need the extra water for growth or photosynthesis. Cell walls would also limit the muscle movements and general mobility of the animal cells.
The growth of two plant saplings A and B, were observed for a period of 6 months. The graph shows the linear growth of the saplings, in centimeters.
After how many months will the heights of the two samplings be the same?
Answers
Which blood vessel contains valves?
A renal artery
B renal vein
Carteriole
D capillary
Answers
Answer:
B
Explanation:
veins contain valves that ensure blood flows in only one direction.
What is the layer directly below the earths plates
Answers
Answer:
asthenosphere
Explanation:
simple, asthenosphere.
8.
Which event will cause a protein to function incorrectly within a cel
А
A decrease in the amount of carbohydrates in the cell lowers the amount of available energy.
B A chemical causes the cell membrane to become more ridged to prevent water loss.
С A cell is exposed to a chemical that increases the rate at which RNA is produced.
An increase in the internal temperature of the cell changes the protein's shape.
Answers
How has CO2 changed over the last 200 years??
Answers
Answer:
It has increased
Explanation:
The concentration of carbon dioxide in the atmosphere has increased in the last 200 years. The extra carbon dioxide is causing an enhanced greenhouse effect greater than would happen naturally.
The end products of the citric acid cycle include all of the following EXCEPT
O pyruvate.
O CO2.
O FADH2
O ATP.
Answers
The end products of the citric acid cycle include \(CO_{2}\) , \(FADH_{2}\) and ATP, but not pyruvate.
The end products of the citric acid cycle (also known as the Krebs cycle) include \(CO_{2}\), \(FADH_{2}\), and ATP, but not pyruvate.
The citric acid cycle begins with the entry of acetyl-CoA, derived from the breakdown of glucose or fatty acids, into the cycle.Acetyl-CoA combines with oxaloacetate to form citrate, which undergoes a series of enzymatic reactions.During the cycle, citrate is gradually metabolized, releasing \(CO_{2}\) molecules as a byproduct.As the cycle progresses, energy-rich molecules, such as NADH and \(FADH_{2}\), are produced through redox reactions.These electron carriers (NADH and \(FADH _{2}\)) carry high-energy electrons to the electron transport chain for ATP synthesis.In addition, one ATP molecule is directly generated through substrate-level phosphorylation during the cycle.At the end of the citric acid cycle, the original acetyl-CoA is fully oxidized to \(CO_{2}\), and the cycle starts anew with the entry of another acetyl-CoA molecule.In summary, the end products of the citric acid cycle are \(CO{2}\), \(FADH_{2}\), and ATP, while pyruvat is not an end product of this cycle.
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Which type of plate boundary is associated with subduction of a plate?
Answers
Answer:
convergent boundary
Explanation:
hope it helps
ill give brainly pls help
Answers
Answer:
D
Explanation:
because the divide it by mm
Explain why sometimes we have to use the indirect methods to value a natural resource. Pick an example of a resource and what method would you use to value your chosen natural resou"
Answers
Sometimes, it is necessary to use indirect methods to value a natural resource due to various reasons. One common reason is the complexity and uniqueness of natural resources, which may not have clear market prices or easily quantifiable values.
Additionally, there might be limitations in data availability or difficulties in capturing all the economic, social, and environmental aspects associated with a particular resource. In such cases, indirect methods are employed to estimate the value of the resource based on related factors.
Let's consider the example of valuing a forest ecosystem. Forests provide a wide range of ecological services such as carbon sequestration, water purification, habitat provision, and recreational opportunities. These services often do not have direct market transactions, making their valuation challenging.
One method used to value forests is the contingent valuation method (CVM). CVM involves conducting surveys or interviews to ask individuals how much they are willing to pay for the preservation or improvement of a specific forest area. By aggregating these individual preferences, an estimate of the forest's economic value can be derived.
Another approach is the travel cost method (TCM), commonly used for valuing recreational services provided by forests. TCM estimates the value of a forest by analyzing travel costs incurred by visitors to reach the forest and engage in recreational activities. The idea is that visitors' willingness to spend money and time reflects the value they place on the forest experience.
Furthermore, the hedonic pricing method (HPM) can be applied to evaluate the value of forests in terms of property prices. HPM examines the relationship between property values and the proximity or accessibility to forests. By statistically analyzing property sales data, the incremental value attributed to forest proximity can be estimated.
These indirect methods help capture the multifaceted value of natural resources like forests, incorporating economic, ecological, and social dimensions into the valuation process. However, it's important to acknowledge that these methods have their limitations and uncertainties, and the results should be interpreted with caution.
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Nondisjunction during meiosis 1 of oogenesis will result in eggs that have______ a. the normal number of chromosomes. b. one too many chromosomes. c. one less than the normal number of chromosomes. d. Both b and c are correct.
Answers
Nondisjunction during meiosis I of oogenesis will result in eggs that have either one too many chromosomes or one less than the normal number of chromosomes.
Nondisjunction is the failure of chromosomes to separate properly during meiosis, resulting in an unequal distribution of chromosomes in the resulting cells. During meiosis I of oogenesis, if nondisjunction occurs, it can lead to eggs with abnormal chromosome numbers.
Option b states that eggs with one too many chromosomes are a possible outcome of nondisjunction during meiosis I of oogenesis. This condition is known as trisomy, where an extra copy of a chromosome is present in the egg.
Option c states that eggs with one less than the normal number of chromosomes are also a possible outcome of nondisjunction during meiosis I of oogenesis. This condition is known as monosomy, where a chromosome is missing from the egg.
Therefore, both options b and c are correct, as nondisjunction during meiosis I of oogenesis can result in eggs with either one too many chromosomes or one less than the normal number of chromosomes.
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Which type of succession do the biotic components of a community cause?
The biotic components of a community alter it to cause
succession.
Answers
Answer:
Autogenic succession
Explanation:
Ecological succession refers to series of biological changes that occurs to a biological community. Based on the components that induce the occurrence of succession, succession can be of two types viz: autogenic or allogenic succession.
Autogenic succession is the succession that is self-caused by the biotic components of that ecosystem. As opposed to allogenic succession, which is caused by external abiotic factors (hurricane, flooding etc), autogenic succession is caused by the living organisms that make up such ecological community.
Autogenic succession
trust me
Leaves appear green because the green portion of the light that strikes them out is
Answers
Answer:
reflected
Explanation:
Whatever color your eye sees is the reflected light. So all colors absorbed.
Perform transcription by using the following piece of DNA. Introns are underlined. Write the final strand of mRNA created.
T A C C G T A C A A T G G G A T C
Answers
Answer:
A-T-G-G-T G-T T-A-C C C-T-A-G
Explanation:
TACCGIA CA ATG G GATC
A-T-G-G-T G-T T-A-C C C-T-A-G
The "I" in the first few letters shouldn't probably be there since there are only 4 bases: A, T, C, and G.
What percentage of body water loss can impact athletic performance?
Answers
An enzyme follows Michaelis-Menten kinetics. Indicate (with t, I or-) how the kinetic parameters would be altered by the following factors at the left. (6 marks) Km/Vmax A competitive Inhibitor ¬¬___
A uncompetitive Inhibitor ____
Urea Doubling the substrate ____
100 °C water bath ___
Doubling the enzyme___
Answers
The kinetic parameters would be altered accordingly
a) increase in apparent Km.
b) a decrease in both Vmax and Km.
c) The apparent Km remains the same.
d) The apparent Km remains the same.
How would the kinetic parameters alter?Km/Vmax of an enzyme following Michaelis-Menten kinetics can be altered by various factors, as indicated below:
Competitive Inhibitor: t
A competitive inhibitor binds to the active site of the enzyme, competing with the substrate for binding. This results in an increase in apparent Km, since the inhibitor reduces the effective concentration of the enzyme available to bind with the substrate, and does not affect Vmax.
Uncompetitive Inhibitor: I
An uncompetitive inhibitor binds to the enzyme-substrate complex, forming a non-productive enzyme-inhibitor-substrate ternary complex. This results in a decrease in both Vmax and Km, since the inhibitor reduces the effective concentration of the enzyme-substrate complex available to form the product.
Urea: -
Urea is not an inhibitor or substrate of the enzyme. It is a chaotropic agent that can denature proteins by disrupting hydrogen bonds, hydrophobic interactions, and disulfide bonds. Therefore, urea can alter the conformation of the enzyme, resulting in a decrease in Vmax and an increase in Km.
Doubling the substrate: -
Doubling the substrate concentration increases the rate of reaction until it reaches Vmax. The apparent Km remains the same.
100 °C water bath: -
High temperatures can denature proteins by breaking hydrogen bonds, hydrophobic interactions, and disulfide bonds. Denaturation of the enzyme can result in a decrease in Vmax and an increase in Km.
Doubling the enzyme: -
Doubling the enzyme concentration increases the rate of reaction until it reaches Vmax. The apparent Km remains the same.
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Gametes from two plant species combine and produce a haploid zygote, and that zygote develops int haploid, hybrid plant that is sterile. Why is the hybrid plant sterile? Select all that apply. Select one or more: a. Meiosis cannot occur. b. The plant cannot grow. O c. The cells do not contain homologous chromosomes. d. The gametes produced cannot combine with the gametes of other plants. e. Mitosis cannot occur. Body characteristics affect the likelihood of fossilization. Which statement(s) about body characteristics is (are) true? Select all that apply. Select one or more: a. If an organism has a soft body, it is more likely to form a fossil because minerals can penetrate it more easily. b. A hard shell is not crushed easily and does not decompose quickly. c. If an organism has a soft body, it is less likely to be fossilized. Competition is central to the theory of natural selection. Why does competition occur? Select one: O a. Organisms are naturally antagonistic (hostile). O b. Females must choose among possible mates. c. Males must defend their territories. O d. Organisms typically produce too many offspring, and resources are limited.
Answers
Gametes from two plant species combine and produce a haploid zygote, and that zygote develops into a haploid, hybrid plant that is sterile. The hybrid plant is sterile because meiosis cannot occur and the cells do not contain homologous chromosomes. Hence, the correct options are a and c. If an organism has a soft body, it is less likely to be fossilized because the body breaks down before it can be preserved. Competition occurs because organisms typically produce too many offspring, and resources are limited. This means that not all of the offspring will be able to survive and reproduce. As a result, the offspring must compete for resources such as food, water, and mates. Hence, option d is the correct answer.
Gametes from two plant species combine and produce a haploid zygote, and that zygote develops into a haploid, hybrid plant that is sterile. The hybrid plant is sterile because meiosis cannot occur and the cells do not contain homologous chromosomes. Hence, the correct options are a and c.
Mitosis and the plant's ability to grow is not affected by sterility. Sterility, on the other hand, means that the plant cannot produce any reproductive cells (like gametes), making it unable to reproduce. Therefore, option b and option d are incorrect. Additionally, the hybrid plant's sterility is caused by an odd number of chromosomes, which results in the improper separation of chromosomes during meiosis.
Body characteristics affect the likelihood of fossilization. A hard shell is not easily crushed and decomposes slowly, which allows for better fossilization of the organism. As a result, option b is correct and options a and c are incorrect. If an organism has a hard shell, it is more likely to form a fossil.
If an organism has a soft body, it is less likely to be fossilized because the body breaks down before it can be preserved. Competition occurs because organisms typically produce too many offspring, and resources are limited. This means that not all of the offspring will be able to survive and reproduce. As a result, the offspring must compete for resources such as food, water, and mates. Hence, option d is the correct answer.
Females choosing among possible mates or males defending their territories are examples of intraspecific competition, which is a type of competition that occurs within a species. However, the question is asking why competition occurs in general, and the answer is that resources are limited and organisms produce too many offspring. Therefore, options a, b, and c are incorrect.
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2 Which substance, needed for protein synthesis, is carried into a leaf from the stem? A carbon dioxide B nitrate C oxygen D starch
Answers
The substance, needed for protein synthesis, that is carried into a leaf from the stem is nitrate. Nitrate is an essential nutrient that plants use to produce amino acids and proteins. It is a part of the nitrogen cycle and is used in chloroplasts to create essential proteins.Option B is correct
The process of protein synthesis takes place in chloroplasts of the leaves of plants where nitrogen, along with other elements, is utilized to produce proteins. Nitrogen, in the form of nitrate, is an essential element required by the plant for the synthesis of amino acids and proteins.
Plants obtain nitrate through the soil from the water they absorb through their roots. It is transported from the roots to the leaves through the xylem vessels, which form a continuous pipeline from the roots to the stem and leaves of the plant. The process of protein synthesis is important for the growth and development of plants.
It is essential for the production of enzymes, hormones, and structural components such as cell walls and membranes. Nitrate is, therefore, a critical substance for protein synthesis and the growth and development of plants. Option B is correct
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Brain pop clasification
Answers
Answer:
With Tim and Moby.
Explanation:
Brainpop time
It's a place for all your friends
And learn your way to very
Distant lands
With Moby the bot
And Tim the human
Education never ends
Brainpop time!
Are earthquakes predictable? Explain your answer.
Answers
No. Scientists have never predicted a earthquake. We do not know how, and we do not expect to know how any time in the foreseeable future.
Answer:
Nope Because
Explanation:
They are not based on scientific evidence, and earthquakes are part of a scientific process. For example, earthquakes have nothing to do with clouds, bodily aches and pains, or slugs.