Scientists determine the beginnings and endings of eras based on significant shifts in Earth's geology and life forms, often identified through major geological events and changes in the fossil record. Each era in geologic time represents long time spans categorized by distinct characteristics. Scientists use fossil records, geological markers, and research to define these eras and their transitions.
Explanation:Scientists, specifically geologists and paleontologists, determine when an era ends and a new one begins based on significant shifts and changes in the Earth's geology and its life forms. This is often identified through the fossil record and major geological events. For example, the end of the Cretaceous era is marked by a significant mass extinction event, including the disappearance of dinosaurs.
An era in geologic time is a long time span, typically billions of years, categorized by distinct characteristics, such as the presence or absence of certain types of fossils. Each era is then divided into periods, epochs, and ages which relate to marked changes in the fossil record or geologic events.
In essence, scientists use a combination of fossil records, geological markers, and ongoing research to define eras and their transitions. This makes the understanding of Earth's history more organized and comprehendible.
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So These are science questions i need help im offering 60 points
1. What is the relationship between the Universe Galaxies, The solar systems and stars?
(Make sure to describe each by size and what is in them)
2. How do galaxys Form?
(Make sure to say what force causes them to form)
3. How does a stars temperature and mass affect the appearance of the star?
(Make sure to discuss what the star looks like- color and brightness based on both temperature and mass)
A ____ is something that is essential for an organisms life
what is vertebrata and interbrata
Which of the following correctly explains the steps pictured below? An image depicting three stages of meiosis. The first shows two cells with chromosomes still paired as sister chromatids and spindle fibers beginning to form. The second pair of cells shows sister chromatid pairs lined up in the middle of the cell with spindle fibers attached to the centromeres of each pair. The third pair of cells shows the centromeres separating and individual chromosomes moving along the spindle fibers to opposite ends of the cell. Prophase II, Metaphase II, Anaphase II Prophase II, Anaphase II, Telophase II Prophase I, Prophase II, Metaphase I Prophase I, Metaphase I, Anaphase I
The stages of meiosis depicted in the image are Prophase I, Metaphase I, and Anaphase I, which involve the condensing of chromosomes, their alignment at the cell's center, and their separation to opposite sides of the cell, respectively.
Explanation:The correct sequence for the three stages depicted in the image is Prophase I, Metaphase I, and Anaphase I. In Prophase I, chromosomes condense, and spindle fibers begin to form, effectively preparing the cell for division. This mirrors the first image you described. In Metaphase I, which is the second image in your description, the chromosomes align along the metaphase plate in the middle of the cell, with spindle fibers attached to each chromosome's centromere. Lastly, during Anaphase I, which aligns with the third image you provided, the homologous chromosomes are pulled apart by the spindle fibers and move towards opposite ends of the cell, separating the centromeres.
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why do red bellied black snakes live in the easternboard of australia
Write a short paragraph describing the role of all four types of lipids: fats, phospholipids, waxes, and steroids.
Answer:
Fats, also known as triglycerides, stores energy, assists in body insulation, and protects the organs. The structure of the cell membrane is made up of phospholipids. Cholesterol and hormones are made up of steroids. The leaves and fruits of several plants are coated with wax to avoid losing water.
Explanation:
Lipids play diverse and essential roles in biological systems, and there are four main types: fats, phospholipids, waxes, and steroids. **Fats**, or triglycerides, serve primarily as an energy storage molecule, providing a concentrated source of energy when metabolized.
They also serve as insulation and cushioning in the body. **Phospholipids** are critical components of cell membranes, forming a lipid bilayer where the hydrophilic head interacts with water while the hydrophobic tails create a barrier between the cell's interior and its surroundings. **Waxes** serve as waterproofing and protective coatings in plants and animals, preventing water loss and offering protection against environmental factors.
Lastly, **steroids**, including cholesterol and hormones like estrogen and testosterone, serve as signaling molecules and structural components in cell membranes, influencing various physiological processes, from maintaining membrane fluidity to regulating metabolism and growth. Each lipid type plays a distinct and vital role in the structure and function of living organisms.
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What is one way homeostasis benefits living organisms? It maintains balance. It reduces air pollution. It increases food consumption. It regulates atmospheric temperature. PLZ HURRY
x-ray diffraction photographs by wilkins and franklin suggested that
X-ray diffraction photographs by Wilkins and Franklin suggested that the structure of the DNA, and from the X-ray crystallography, the DNA double helical structure was established.
What is the significance of X-ray crystallography?X-ray crystallography helped to observe the DNA, and the image was taken by the scientist Rosalind Franklin. These X-ray crystallography images provided evidence for the double helix model proposed by Watson and Crick and helped in the understanding of genetics. After that, this is used in molecular biology, medicine, biotech, etc. to get a better cure.
Hence, x-ray diffraction photographs by Wilkins and Franklin suggested that the structure of the DNA, and from the X-ray crystallography, the DNA double helical structure was established.
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Osmosis occurs when there is a different concentration of solute molecules on each side of the membrane. The drawing below shows a beaker containing a 30% salt solution and a suspended cell containing a 10% salt solution. What statement best describes the cell after 20 minutes?
According to the simulation, _______ helps predators to survive by allowing them to sneak up on their prey. a. camouflage b. mimicry c. speed d. night vision Please select the best answer from the choices provided
Answer: a.Camouflage
Simulation is a deception in the characteristics of the organism which favors it's survival in the environment. Camouflage is a kind of simulation, in which the organism adapt the color or shape according to the surrounding environment in order to remain undetected by a prey and a predator. For example, chameleon is a reptile, which can change it's color according to the surrounding environment. It changes it's color to green in grass and remains brown in the tree bark in order to eat insects and remain undetected from prey and predator population.
Therefore, According to the simulation, camouflage helps predators to survive by allowing them to sneak up on their prey.
What shape does the molecule in the image have? A) linear B) tetrahedral C) double helix D) single helix
Answer:
double helix
Explanation:
trust me its right
how is geothermal energy used?
a. material is burned to cook food or drive engines b. moving water turns a turbine to produce electricity. c.wind turns a mill that makes a generator work. d. heated water warms buildings or generates electricity.
What trait variation did Charles Darwin observe after studying the Galapagos finches? (5 points)
How did Darwin explain the differences in traits? (10 points)
The finches of the same genus had different characteristic on the different islands of the Galapagos. They had different graded beaks sizes and shapes. In some islands, finches had sharp beaks for stabbing their prey. In other islands, the fiches had short stout beaks for grain-eating. This is a case of allopatric speciation where a population of the finches diverged to.adapt to the habitats in the different islands and also claim different niches
There where 3 different variations of the Galapagos Islands. We'll call them flocks X, Y, and Z. All of them eat fruits, seeds, and insects, but they have their own preferences. Flock X has sharp, piercing beaks that good for catching bugs and eating soft fruit, but they will also eat seeds. Flock Y has hard, spoon-like beaks that are good for breaking seeds, but they will also eat insects and fruits. Flock Z has short beaks that are good for catching insects, but will also eat fruits and seeds.
Energy from the sun comes from fusion. What happens during that reaction?
A.Carbon dioxide turns into oxygen
B. hydrogen turns into helium
C. helium turns into hyrdrogen
D. oxygen turns into carbon dioxide
please help
1. a) The scientific method is the process that scientists use to find out new information. It involves a question, a hypothesis, a prediction, collecting data, and analyzing that data to make a conclusion. How would you use the scientific method to answer this question: Do pumpkins grow bigger when fed milk? (Use each of the steps of the scientific method in your answer.) (15 points)
b) State one scientific question. (2 points)
Answer:
a) The question "Do pumpkins grow bigger when fed milk?" it is already a hypothesis, which means that to apply the scientific method, we should establish an experiment, where we would select a squash squash, feed some with milk and some without milk and wait a certain period of time. After that time, we could move on to the stage of the scientific method called "evaluation of results" where we would evaluate the differences in development and size between the pumpkins that were fed with milk and those that were not. After that we would go to the phase called "conclusion" where based on the comparison of the results we would answer the hypothesis shown above.
b) A scientific question could be "Can bean seeds germinate in sterile soil?"
Explanation:
Scientific method is a set of steps that must be followed when someone wants to prove a hypothesis based on experimental and scientific data. These steps are: visualization of something questionable, formulation of the hypothesis about it, establishment of a scientific experiment to test the hypothesis, evaluation of the results of the experiment and conclusion.
A scientific question is every question that you can perform a scientific experiment to answer it. This scientific experiment is carried out with the steps of the scientific method.
The movement of tectonic plates in two locations is described below:
Location A: Tectonic plates collide and one plate moves over the other while the other plate is pushed deep into the mantle
Location B: Tectonic plates slide past each other
Which statement is most likely correct?
Volcanic eruptions may occur in both locations.
There is no chance of earthquakes in the two locations.
Mountains may form in Location B but not in Location A.
Subduction happens in Location A but not in Location B.
Final answer:
Location A exhibits characteristics of a convergent plate boundary with subduction leading to possible volcanic activity, while Location B represents a transform plate boundary where earthquakes can occur, but not volcanism or mountain building.
Explanation:
The movement at Location A is indicative of a convergent plate boundary, where one tectonic plate is subducted beneath another. This process can lead to volcanic activity as the subducted plate melts and forms magma that can rise to Earth's surface. Hence, subduction happens in Location A but not in Location B. On the other hand, Location B describes the characteristics of a transform plate boundary, where tectonic plates slide past each other. This motion can build up strain that, when released, results in earthquakes, but it does not typically cause volcanic eruptions or mountain formation as there is no subducting plate.
Changes in ___ and ___ are involved in creating a metamorphic rock from another rock.
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Write about any two natural resource that can be used as both a material resource and as an energy resource in the UAE.
Taking a prenatal vitamin is very important for a breastfeeding mother. true or false
The correct answer is, "True".
-Hope this helps.
how does observing work ethics help in a workplace
Productivity is increased by observing work ethics
Advantages of observing work ethicsWork ethics are written or unwritten guidelines bordering on the behavior of employees in workplaces.
Work ethics are put in place to maintain adequate moral values among employees and in employer/employee relationships.
Work ethics help prevent disasters that could harm businesses or limit productivity.
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What is the responsibility of a scientist?
A. To answer scientific questions accurately
B. To answer philosophical questions
C. To advertise new technology
D. To be involved in politics
Which of the following uses of grasslands is least harmful to the ecosystem?
plowing it for crops
using it for range land
developing commercial areas
importing foreign animals to use the grasslands as a habitat
Answer: using it for range land
Grassland is an ecosystem which is dominated by grasses as herbs, shrubs and other vegetation. Using grassland for range land can be least harmful as a range land is an area of grassland which is used by domestic or wild herbivores for grazing. The grass used by these animals grows again so there is no major loss to the ecosystem. Plowing it for crops will remove the entire naturally growing vegetation. Developing commercial areas will also remove grasses from grassland and will cause the loss of floral and faunal species. Importing foreign animals to use the grasslands as a habitat will result in drought conditions as grasses may wiped out from these regions.
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14. Give a short description of star clusters. Describe (1) how they are held together, (2) how old they are, and (3) how astronomers categorize them.
15. What types of stars make up open clusters, and what is the fate of these stars?
16. Describe the cluster that includes our own Sun.
17. How do globular clusters differ from open clusters?
18. Two star clusters visible to the naked eye are _________________ and _____________________________
This is the energy needed to drive photosynthesis.
Answer:
sunlight
Explanation:
The energy required for photosynthesis is sunlight. Photosynthesis is a process wherein plants convert sunlight into chemical energy, making it vital for their growth and survival.
Explanation:The energy needed to drive photosynthesis is sunlight, also known as solar energy. Photosynthesis is the process plants use to convert light energy into chemical energy, which is stored in the bonds of sugars and other food molecules they make. Maize, algae, and many other organisms also rely on this form of energy to fuel their growth and survival.
The process of photosynthesis is initiated when sunlight strikes the chloroplasts in the cells of a plant's leaves. This absorbed light energy is then used to convert carbon dioxide from the atmosphere and water from the soil into glucose, which is a type of sugar that plants use as a source of energy.
The energy needed to drive photosynthesis is light energy. Light energy is absorbed by the chlorophyll pigments in plant cells, which then use this energy to convert carbon dioxide and water into glucose and oxygen during the process of photosynthesis. This energy is essential for plants to produce their own food and carry out other metabolic activities.
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a unicellular prokaryotic organism is discovered by scientists. are these characteristics enough to place it in a domain or is it more information needed
The organism's classification requires further information beyond being unicellular and prokaryotic, as both the Bacteria and Archaea domains share these characteristics. Additional details such as cell membrane composition or rRNA sequence are needed for accurate placement.
Explanation:Knowing that the organism is unicellular and prokaryotic is crucial but not entirely sufficient for its classification into one of the three domains: Bacteria, Archaea, or Eukarya. The domains Bacteria and Archaea include organisms that are unicellular and prokaryotic, meaning they lack a nucleus and membrane-bound organelles. However, these two domains have distinct differences in their cell membrane structures and rRNA sequences.
Consequently, further information is required to determine whether the organism belongs to the domain Bacteria or Archaea. One type of information that could help classify the organism is the chemical composition of its cell membrane or the sequence of its ribosomal RNA (rRNA). If scientists analyze these aspects and find a certain type of lipid unique to Archaea or if the rRNA sequence aligns more closely with that of known Archaea, they could classify it within the domain Archaea. Conversely, if its cell membrane composition and rRNA more closely resemble Bacteria, then it would be classified in the domain Bacteria.
How to figure out the inclination of the earths axis
How does heat flow inside Earth move the tectonic plates?
The heat flow inside Earth moves the tectonic plates in the form of convection currents.
How does heat flows inside the earth?Convection in the mantle has been inferred from the fact that the temperature gradient is significantly lower in the main portion of the mantle than in the lithosphere. Hot rocks are physically moved across the mantle during convection to transfer heat. This causes the movement of tectonic plates in the mantle.
Plate tectonic activity frequently leads to magma formation, igneous intrusions, metamorphism, volcanic activity, earthquakes, faulting, and folding. This process can cause the rise of land and the formation of mountains.
Therefore, the heat flow inside Earth moves the tectonic plates in the form of convection currents.
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Compare and contrast the structure of a compound light microscope and a dissecting microscope
Compound light microscopes have higher magnification and are used for thin samples, while dissecting microscopes have lower magnification and are used for larger objects.
Explanation:The compound light microscope and the dissecting microscope are both types of microscopes used in biological studies, but they have different structures and functions.
Compound Light Microscope:
Has a higher magnification power (up to 1000x) and is used to observe thin, transparent samples like cells and microorganisms.Consists of a single lens system with objectives and oculars (eyepieces) to magnify the image.Produces an inverted image of the specimen.Dissecting Microscope:
Has a lower magnification power (20 to 80x) and is used to examine larger objects, such as tissues and specimens.Uses two separate lens systems for each eye to provide a three-dimensional view.Produces an upright image of the subject.Learn more about microscope here:
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What might the colonists have harvested in 1621?
For organisms to be classified as the same species, they must be able to breed with each other and produce _____ offspring
Answer:
fertile
Explanation: