Answer:
The biggest surprise came when the scientists dated the remains to only about 18,000 years old. This small species of human existed at the same time aş Homo sapiens, the species that modern human beings belong to. ... This supports the idea that the hobbits are actually a separate species.
Explanation:
Final answer:
The age and physique of Homo floresiensis were surprising because they displayed both ancient and modern human features and were thought to show complex behaviors despite their diminutive size and brain, leading to theories of island dwarfing.
Explanation:
The researchers were surprised to find out how old the remains of Homo floresiensis, also known as "the Hobbit", were because these remains challenged previous conceptions of human evolution. Not only was the species dated to approximately 100,000-60,000 years ago, which overlaps with the existence of modern humans, but their small stature and tiny brain volume were unexpected for that time period. The discovery of Homo floresiensis in the Liang Bua cave also showed evidence of sophisticated behaviors like the use of fire for cooking, which suggests complex cognitive abilities despite their small brain size. This combination of ancient dating and unexpected physical characteristics led to theories of regional evolutionary adaptations like insular dwarfing, which posits that limited resources on the island of Flores favored smaller body size over time.
Where are most of the nutrients from food absorbed? And what happens to the nutrients once they’re absorbed? (Worth 20 points)
Answer:
Nutrients get absorbed as the food is broken down, with the majority of nutrients being absorbed in the small intestine, where they're then transported into the blood stream
Explanation:
The majority of nutrients from food are absorbed in the small intestine after digestion. Nutrients enter the bloodstream or lymph system and are transported throughout the body. Undigested and unabsorbed materials are passed to the colon for water reabsorption and waste elimination.
Most of the nutrients from food are absorbed in the small intestine. The digestive system begins breaking down food in the mouth where enzymes in saliva start the process of digestion. This process continues as food moves to the stomach and then to the small intestine, where enzymes complete the digestion of food.
Once digestion is complete, the absorption of nutrients takes place. This is where substances pass into the bloodstream or lymph system, allowing them to circulate throughout the body. A substantial percentage, approximately 95%, of nutrient molecules are absorbed in the jejunum, the second part of the small intestine.
Other nutrients, such as iron and vitamin B12, are absorbed in different parts of the small intestine like the duodenum and ileum, respectively. Post-absorption, nutrient molecules are transported to various parts of the body for storage or further chemical modification.
Any undigested and unabsorbed matter moves into the colon (large intestine), where water is reabsorbed and the remaining waste material is eventually eliminated from the body through defecation.
Arrange the inner layers of the Sun in order starting with the innermost layer.
a. Energy produced by nuclear reactions in the core travels to this zone through radiation.
b. The center of the Sun where all the Sun's energy is produced.
c. In this zone, hotter gases from the base travel to the top and cooler gases sink to the bottom due to the temperature difference.
d. This zone is visible from Earth.
Answer:
B, A, C, D
hOPE THIS HELPS:)
B, A, C, D
Have a good day! :)
which line of defense includes active immunity 1st 2nd 3rd 4th
Answer:
Second line
Explanation:
I did a test with this answer. Mark as brainliest if this is correct sorry if I'm too late :D.
which statement about nuclear fission is false?
a: nuclear fission takes place in the core of the stars
b: the fuel for nuclear fission is often uranium
c: nuclear fission releases large amount of energy
d: nuclear fission is used to generate electricity at nuclear power plants
Answer:
d: nuclear fission is used to generate electricity at nuclear power plants
Explanation:
Nuclear fission is obtained by radioactive decay or nuclear reaction in which nucleus of an atom split into two or more nuclie.
Nuclear energy in nuclear power planst is result of nuclear fission process. In nuclear power plants, uranium atoms undergo process of nuclear fission and split into several nuclie, which generates heat and produces steam. The steam is then used by the turbine to generate electricity.
Hence, the correct option is d.
The statement about nuclear fission which is false is it taking place in the
core of stars.
Nuclear fission is a type of reaction which involves the splitting of an atom
into different parts. This process involves a lot of energy and a common
fuel for it is Uranium. It has importance such as generation of electricity
and researches.
Nuclear fusion takes place in the core of stars and involve the fusion of two
hydrogen atoms to become a helium atom.
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Giardia is a eukaryotic organism that can cause intestinal illness in dogs, cats, and humans.
Which of the following distinguishes Giardia from all prokaryotes?
Choose 1 answer:
A It has cytoplasm.
B It has a nucleus.
C It is single-celled.
D It can reproduce
Answer:
Option B.
It has nucleus.
Explanation:
Giardia is a microscopic single celled prokaryotic organism that causes giardiasis. Giardiasis is an intestinal Infection in humans and dogs which is caused by giardia. It is an eukaryotic organism that have nucleus and nuclear membrane but it lacks other ORGANELLES that are present in Eukaryotic organisms. It causes diarrhoea in humans and woman's can get infected from dogs.
Answer:
B. It has a nucleus
Explanation:
All living organisms were classified into a large group called DOMAIN. These organisms were classified into two domains viz EUKARYA and PROKARYA depending on whether or not they possess a nucleus. Organisms in the Eukarya domain called Eukaryotes possess a membrane-bound nucleus that houses their genetic material (DNA) while organisms in Prokarya domain called prokaryotes do not possess a membrane bound nucleus.
Based on this, Giardia organism that is described to be an eukaryotic organism that causes illness in cats, dogs and humans is distinguished from any prokaryote by its possession of a membrane-bound nucleus in the cytoplasm of its cell. Any organism referred to as EUKARYOTIC must possess a NUCLEUS.
Question 12 (1 point)
Where do animals obtain the nitrogen they need?
plants they cat
bacteria living within them
Answer:
legumes
plants they eat
Explanation:
Legumes have bacteria attached to it to allow for nitrogen absorption
the bacteria provide the plant with nitrogen, then the plant is eaten (bacteria can no longer provide more nitrogen if eaten).
Using the data from the graph, explain the relationship between the population of snowshoe hares and the population of the lynx. Explain what the graph's lines mean about the relationship.
As you already know, lynx are predators of hares and a balance between the populations of these two animals is necessary, so that the populations have a stable growth.
As you can see in the chart above, when the lynx population is very low, the hare population is high. This is because, as there are few lynxes, predation is low and hares are able to maintain their birth rate higher than the mortality rate. However, there are many hares available for lynx to feed on, which allows the lynx's birth rate to also be higher than the mortality rate, which causes the lynx population to grow.
Also according to the graph, you can see that as the lynx population grows, the hare population decreases. This is because the greater number of lynx causes predatorism to increase and hares are hunted by lynx in greater quantities. This causes the mortality rate of hares to be higher than the birth rate, which decreases its population. On the other hand, the abundance of food allows the lynx population to grow to some extent. This is because, as you can see in the graph, when the hares population is very small, the lynx does not have enough food, which causes an increase in the mortality rate, also decreasing the lynx population.
When the lynx population is low, predatorism is lower, which allows hares to reproduce by increasing their population, which will result in an increase in the lynx population.
The graph shows how the population of snowshoe hares and lynx are related over time. When hare population is high, lynx population increases, and when hare population decreases, lynx population decreases.
Explanation:The graph shows the relationship between the population of snowshoe hares and the population of lynx over a period of time. The x-axis represents time, while the y-axis represents the population size. The lines on the graph indicate the trends in the population sizes of both species. When the snowshoe hare population is high, the lynx population tends to increase, as lynx feed primarily on hares. However, when the hare population decreases, the lynx population also decreases due to a lack of food.
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Finfish, ocean catches, and fish-farming provide approximately what percentage of
animal protein consumed by humans around the world?
12
Answer:
30 percent
Explanation:
Protein is essential in living organisms. They are the building blocks of life and help in the replacement and repair of work out tissues of the body. There are various sources of protein which are plant sources and animal sources.
Animal sources include land and aquatic animals.Sea Finfish, ocean catches, and fish-farming provide approximately 30
percent of animal protein sources consumed by humans in the world.
6) Regarding the transport of substances through the membrane, osmosis is:
a) Diffusion of ions by chemical gradients
b) Diffusion of ions by electrical and chemical gradients
c) Simple diffusion of water through a membrane
d) An active transport mechanism
Approximately how many ATP molecules are produced per molecule of glucose?
10
22
36
50
Answer:
38 ATP molecules
Explanation:
Biology textbooks often say that 38 ATP molecules can be created per oxidized glucose molecule during cellular respiration (2 from glycolysis, 2 from the Krebs cycle and also about 34 from the electron transport system therefore the answer is 36.
If you answer this correct I will mark you brainiest: Am I a boy or girl.
Answer:I guess a boy I think by your name
Explanation:
A cross between two pure parents for contrasting traits, e.g. tall and short , result in offspring trait are referred to as: (a) medium (b) short (c) hybrids (d) pure for both traits
Answer:
A
Explanation:
It is a mix of both
What is the role of salmon with respect to shrimp in this food chain?
A. Predator
B. Parasite
C. Host
D. Prey
Salmon plays the role of predator with respect to shrimp in this given food chain. Thus, option A is correct.
What is food chain?A food chain the linear sequence of network of flow of energy in the form of food in food web which starts from producer organism like grass or tress and ends to the predator species such as tiger,bears,etc.
A food chain is the representation of relationship between animals or how they connected to each other.
Each level of food chain shows a different trophic level.
A food chain is converted into food web due to natural interconnections between organisms.Each level of food chain shows a different trophic level.
Therefore, salmon plays the role of predator with respect to shrimp in this given food chain. Thus, option A is correct.
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)
Global warming is most closely associated with
A)
increased use of solar panels
B)
increased industrialization
C)
reducing the rate of species extinction
D)
removal of environmental wastes
Answer:
B -> increased industrialization
Explanation:
pollution and fossil fuel burning
Answer:
B) increased industrialization
What chemical in the igniting of the match causes the acid to be produced?
Answer:
When the match is struck a portion of the red phosphorus on the striking surface is converted into white phosphorus, which then ignites. The heat from this ignites the potassium chlorate, making the match head flame up.
Explanation:
Final answer:
The ignition of a match causes a combustion reaction involving P4S3 and KClO3, generating heat, light, and byproducts like carbon dioxide and water vapor.
Explanation:
The chemical responsible for the ignition of a match and subsequent acid production is a compound of phosphorus and sulfur, specifically P4S3 (tetraphosphorus trisulfide). When a strike-anywhere match is rubbed against a rough surface, friction generates enough heat to initiate a combustion reaction. The KClO3 (potassium chlorate) in the match head also plays a crucial role by providing the oxygen necessary for the phosphorus-sulfur compound to ignite.
Upon ignition, a series of reactions occur that result in the combustion of the match, using cellulose in the match and oxygen from the air to produce energy in the form of heat and light. The chemical reaction between these components forms carbon dioxide and water vapor as byproducts.
WILL GIVE BRAINLEIST AND 15 POINTS Look at the following diagram of the carbon cycle.
An image of carbon cycle is shown. The sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. An arrow is shown from the sun towards the left tree marked A. The sun is marked B. There is an arrow from the air above the clouds, marked C, towards the left tree. An arrow from a location close to the ground marked D points towards Dead Organisms, which is a label under the animal. An arrow marked E points from the right tree straight up to the clouds. An arrow marked F points from the animal straight up to the clouds. An arrow marked G points from the factory towards the air above the clouds, C. There is an arrow pointing from the air to the lake labeled Carbonates in Water, an arrow pointing down from dead organisms to Fossils and Fossil Fuels, and an arrow from Fossils to the factory.
Which of the following facts is best represented by the arrow pointing from G to C?
A) The chemical energy present in fossil fuels is used to create new forms of energy used for photosynthesis.
B) Energy is conserved because the chemical energy present in fossil fuels is used up completely during burning.
C) The mechanical energy produced on burning fossil fuels is transformed into chemical energy stored in carbon dioxide.
D) Energy is conserved because the mechanical energy produced on burning fossil fuels is less than the chemical energy formed.
Answer:
c
Explanation:
Based on your knowledge of energy flow and light absorption, which color(s) of light
will provide energy for photosynthesis? (select all that apply)
Answer:
all except green
Explanation:
all except green because the plant is reflecting green light, not absorbing it :)
The energy flow and light absorption color should include red, orange, blue, and the violet. It does not include green.
What is photosynthesis?Photosynthesis refer to a process that should be used by the plants and the other organism for converting the light energy into the chemical energy via the cellular organism and after this it should be released for furl the activities related to the organism.
Therefore, we can conclude that the energy flow and light absorption color should include red, orange, blue, and the violet.
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The host states that it is easier to identify genes that cause illness in families. In order to do this they studied people in __________.
A. Iceland
B. India
C. America
Answer:
A. Iceland
Explanation:
Island is an island and it may lead to high rates of endogamy due to the availability of mates. Endogamy is the practice of having sexual relations only within a small group (in this case, the small group is represented by people living in the island). Endogamy is a reproductive behavior that is associated with the likelihood suffer genetic disorders because the recessive alleles are exposed to selection
Which consequence of pollution is shown in the photograph?
A. Pollutants react with water and are deposited on Earth’s surface.
B. Eutrophication occurs in the presence of too many nutrients.
C. Pollutants break down the layer of ozone in the stratosphere.
D. Gaseous pollutants and particulate pollution form a haze over cities.
The consequence of pollution shown in the photograph is option D: Gaseous pollutants and particulate pollution form a haze over cities.
The photograph visually represents the presence of pollution in the form of a haze that hangs over urban areas. This haze is often caused by the emission of gaseous pollutants and particulate matter from various sources such as vehicles, factories, and power plants.
It is a visible manifestation of air pollution and can have detrimental effects on air quality, human health, and the environment.
The photograph shows that, due to pollution, gaseous pollutants and atmospheric pollution form fog over cities, as shown in option D.
What is the impact of this?
Lower incidence of solar rivers.Impairment of gas exchange.Increased respiratory problems.Extreme pollution causes polluting particles, less dense than air, to rise to the surface and combine with gaseous pollutant emissions, many from the burning of fossil fuels, remaining above the horizon, reducing visibility, and causing gas traps. inefficient, increasing the heat level and causing many respiratory problems.
A koala must eat 200 grams of leaves each day to survive. The trees in an area can provide 1,380 grams of leaves per day. What is the maximum number of koalas that can survive in the area?
Answer:
6 Kolalas
Explanation:
The maximum number of koalas that can survive in the area is 6.
Each koala must eat 200 grams of leaves per day.
The trees in an area can provide a total of 1380 g of leaves per day.
The maximum number of koalas that can survive in this area would be the total amount of leaves production per day divided by the amount of leaves required by each koala per day.
Number of koala the area can support = 1380/200 = 6.9
Answer:
Explanation:
6
One scientific investigation may result in
A.
further investigations.
B.
the generation of new ideas or phenomena to study.
C.
the development of new methods or procedures for investigation.
D.
all of these
PLS HELP STUDY ISLAND
Answer:
D. all of these
Which of the following statements describes how these organisms are an example of the cell theory?
The organisms have cells that lack a nucleus.
The organisms are made of one or more cells.
The cells of the organisms undergo photosynthesis.
The cells of the organisms are identical to each other
Answer:
I think it would be the first answer choice
Explanation:
Answer:
B
Explanation:
All of the following are common endemic diseases, except __________.
A.
malaria
B.
typhoid
C.
smallpox
D.
tuberculosis
Please select the best answer from the choices provided.
A
B
C
D
Final answer:
Smallpox is the correct answer as it is not an endemic disease; it has been eradicated worldwide. Malaria, typhoid, and tuberculosis remain common endemic diseases in specific geographic areas.
Explanation:
All of the following are common endemic diseases, except smallpox. The correct answer is C. Smallpox.
Endemic diseases are those that are constantly present in a population within a particular geographic area. Malaria (A), typhoid (B), and tuberculosis (D) are all examples of endemic diseases. Malaria is often found in tropical climates and is transmitted by mosquitoes. Typhoid is a waterborne illness that remains a significant concern in areas with poor sanitation. Tuberculosis is a respiratory infection that is quite common in many parts of the world, particularly in urban areas with dense populations.
However, smallpox has been eradicated worldwide due to an effective global vaccination campaign. The last known natural case was in 1977, and it is no longer commonly found anywhere in the world, making smallpox the correct choice for the disease that is not endemic.
What are five common sources of a patient in residence stress
Answer:
The fact that stress is typical during the residency training period is well-documented in the literature, as are its many situational, professional, and personal sources, which the author reviews: heavy work-load, sleep deprivation, difficult patients, poor learning environments, relocation issues
Explanation:
Answer:
Heavy load of work to do, not sleeping well, patients that are difficult, poor learning environments, and isolation issues.
Explanation:
I'm sure i am right, but correct me if i'm wrong.
As always, my pleasure. :)
Rate fairly.
Prisims separate _____ light, such as that form the sun, by wavelength.
Answer:
Prisims separate WHITE light, such as that form the sun, by wavelength.
Final answer:
Prisms disperse white light into a spectrum of colors through a process called dispersion, where light of different wavelengths is refracted by different amounts due to varying refractive indices. Instruments like spectrometers use prisms to separate and analyze these different wavelengths of light.
Explanation:
Prisms separate white light, such as that from the sun, by wavelength through a process called dispersion. Dispersion occurs because different frequencies of light have different refractive indices for a given material. When white light enters a prism—a piece of glass in the shape of a triangle with refracting surfaces—the path of the light is refracted (bent). However, not all colors are bent by the same amount; the bending of the beam depends on the wavelength of the light as well as the properties of the prism. Consequently, different wavelengths (or colors of light) are bent by different amounts and follow slightly different paths. The violet light is bent more than the red light, and, as such, when white light leaves the prism and is focused on a screen, the different colors line up side by side like a rainbow. This separation of colors is a key aspect of spectroscopy.
Additionally, instruments such as spectrometers are used to disperse light and form a spectrum for further analysis. In these devices, light enters through a small hole or narrow slit, is collimated by a lens into a parallel beam of rays, then passes through the prism. Different wavelengths leave the prism in different directions, and a second lens focuses these different images onto a detecting device, such as a CCD. This allows for careful examination of the spectrum created by the dispersion of light.
NEED HELP ASAP
Which description properly describes the plant structures involved in photosynthesis?
Group of answer choices
Stomata take in water, sunlight, and carbon dioxide and release oxygen.
Phloem transports water, stomata take in carbon dioxide, and chlorophyll absorbs sunlight.
Phloem transports glucose to the plant, and stomata release oxygen.
Xylem takes in water, sunlight, and carbon dioxide and releases oxygen.
Answer:
phloem transports water , stomata take the in carbon dioxide ,and chlorophyll absorbs sunlight
What is meiosis?
what is meiosis
Answer:
All cells arise from other cells through the process of cell division. Meiosis is a specialized form of cell division that produces reproductive cells, such as plant and fungal spores and sperm and egg cells.
Explanation:
In general, this process involves a "parent" cell splitting into two or more "daughter" cells. In this way, the parent cell can pass on its genetic material from generation to generation.
The native range of a species includes all areas in which it lives.
True or false?
Answer:
i would say false to the question
Explanation:
Please answer
After a glacier starts melting, the melted ice uncovers lifeless rock and gravel.
Which statement describes what usually happens next?
A. Shrubs that need direct sunlight begin to grow among the grasses
B. Grasses begin to grow in the rocky soil and add organic matter to it.
C. Bacteria on roots of seed plants use nitrogen from the air to make nutrients.
D. Lichens begin to grow in the bare rock and cause it to break down.
Answer: The answer is D. Lichens begin to grow in the bare rock and cause it to break down.
Explanation:
Hope it helps!
What trait do all solar system models share?
All planets have epicycles.
The moon orbits Earth.
The stars rotate around the Sun.
The planets have a circular orbit around the Sun.
Answer:
The correct answer is B.) The moon orbits Earth.
Trust me, I got it right :)
The trait is that the planets have a circular orbit around the Sun. The Option B.
What is a common trait of all solar system models?In all solar system models, a common trait is that the planets have a circular orbit around the Sun. This means that the planets follow a path around the Sun that is roughly circular in shape.
This trait is based on the understanding that the gravitational pull of the Sun keeps the planets in orbit, and the circular orbit is the result of the balance between the gravitational force and the forward motion of the planets. While the orbits of some planets can deviate slightly from perfect circles, the overall pattern of circular orbits is a fundamental characteristic shared by all planets in the solar system.
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