Answer:
As heated material gets closer to the surface, it begins to cool
Explanation:
The core and surface have very different temperatures where the core is extremely hot as compared to the surface. When mantle gets heated as it passes near the core, it rises towards the surface. When it reaches the surface, it begins to cool and becomes more dense. The cooled magma then starts to sink down back near the core where it gets heated again and rises. This is what drives convection currents.
The Earth's plates move as a result of convection currents, with hot material rising towards the crust, cooling, becoming denser, and sinking back towards the core; a continuous cycle that drives plate tectonics.
Explanation:The movement of Earth's plates is largely driven by convection currents within the Earth's mantle. Material near the core becomes heated and becomes less dense, causing it to rise towards the crust. This is reflected in the statement 'Heated materials become less dense, causing them to rise toward the surface'. Once this heated material gets closer to the surface, it begins to cool and becomes denser. This is referred to in the statement 'As heated material gets closer to the surface, it begins to cool'.
As it cools, the material becomes denser and sinks back towards the core, as referenced in the statement 'As materials cool, they become less dense and sink back toward the core'. This continuous cycle of heating, rising, cooling, and sinking causes the movement of Earth's plates.
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What is the primary function of plant leaves?
Answer: The primary function of leaves is to collect sunlight, for use in photosynthesis.
Hope this helped!!
Answer:
The primary function of leaves is to collect sunlight as the energy source to drive photosynthesis.
Explanation:
Photosynthesis is the process that occurs in plant cells. The chlorophyll (green pigmint) is what captures the sunlight energy.
what is the main difference between animal cell and plant cell?
There are a few differences between plant and animal cells. One major difference is their structure; animals are enclosed by a cell membrane, but plant cells have a cell membrane and a cell wall to give them a more solid form. Another major difference is that plant cells have chloroplasts for photosynthesis whereas animal cells do not because they do not undergo photosynthesis.
Hope this helps!!
The main difference between animal and plant cells is that plant cells have a cell wall, chloroplasts, and a large central vacuole, which are absent in animal cells. However, animal cells have centrioles and lysosomes, not usually found in plant cells.
Explanation:The main difference between an animal cell and a plant cell lies in a few key structures. Plant cells have a cell wall, chloroplasts, and a large central vacuole, which are not found in animal cells. The cell wall provides additional support and protection to the plant cell. Chloroplasts are where photosynthesis takes place, and the central vacuole stores water and maintains the cell's turgor pressure.
On the other hand, animal cells have centrioles and lysosomes, which are usually not found in plant cells. Centrioles help in cell division, and lysosomes help in digestion and waste removal. Both types of cells have other common structures like the cell membrane, nucleus, and mitochondria among others.
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17. The enzyme DNA polymerase works only in the 5' to 3' direction. How does this affect the leading strand and the lagging strand?
O A. DNA polymerase can use only the leading strand as a template. A different enzyme is used to synthesize DNA on the lagging strand
O B. DNA polymerase can work on both the leading and the lagging strand but is much faster on the leading strand
O C. DNA polymerase can work continuously on the leading strand but must flip the lagging strand around before it can work on it
O D. DNA polymerase can work continuously on the leading strand but works discontinuously on the lagging strand, creating Okazaki fragments.
Answer:
D
Explanation:
This is because the two DNA strands run antiparallel to each other. This means that as the DNA polymerase replicates the leading strand from 5’ --> 3’, the lagging strand is oriented in the 3’ --> 5’ which makes it difficult for a continuous replication like that of the leading strand. The DNA polymerase has evolved a mechanism to replicate the lagging strand discontinuously using many primers. This generates many fragments called Okazaki fragments that are ligated together to form one complete strand.
Answer:
d
Explanation:
what did not occur in the Proterozoic eon?
A. The oxygen level increased greatly in the atmosphere
B. The emergence of Eukarya
C. Multi-celled eukaryotic organism began to diversify
D. anaerobic bacteria kept thriving with more oxygen
Answer:
C. Multi-celled eukaryotic organisms began to diversify
Explanation:
The Proterozoic is an eon in which numerous important things occurred. There were multiple organisms that appeared in this eon. They were able to perform the process of photosynthesis which resulted in gradual pilling up of oxygen into the atmosphere, thus changing the composition of the atmosphere, and setting up the terrain for the future development of other organisms. It is an eon though in which there were only single-celled organisms, while the diversification of multi-celled eukaryotic organisms occurred in the next eon, the Phanerozoic.
During the Proterozoic Eon, the increase in atmospheric oxygen from cyanobacterial photosynthesis led to the extinction of many anaerobic bacteria; thus, D ('anaerobic bacteria kept thriving with more oxygen') did not occur in the Proterozoic eon.
The Proterozoic Eon was a period of significant atmospheric changes, including the Great Oxygenation Event (GOE). This event was characterized by the rise in atmospheric oxygen due to the photosynthetic activity of cyanobacteria, which transformed Earth's anoxic atmosphere. This increase in oxygen led to drastic environmental changes and affected different organisms in various ways.
Answering the question, what did not occur in the Proterozoic eon, option D (anaerobic bacteria kept thriving with more oxygen) is incorrect. As the oxygen levels increased, many anaerobic bacteria were decimated because they could not survive in the presence of free oxygen. On the other hand, aerobic organisms thrived and evolved under these new oxygen-rich conditions.
What is mnemonic device to help you remember the elements that life needs to survive ?
Answer: CORD 'N' GERMS
Explanation: To remember the “Characteristics of Life” Cells, Osmoregulation, Reproduction, Death, Nutrition, Growth, Excretion, Respiration, Movement and Sensitivity.
CHON is a mnemonic device for the four most common elements in living organisms: carbon, hydrogen, oxygen, and nitrogen.
what is mnemonic device ?Mnemonic devices help the memory, using different systems like rhymes, rules, phrases, diagrams, or acronyms, help to remember, memorize, and recall information like names, dates, facts, or figures.
They turn the original information into an easy, appealing rhyme or sentence, can be stored in the brain as a meaningful chunks of data.
There are different types of mnemonic devices where many of them overlap, five most common types of mnemonic devices are acronyms and acrostics, association device, chunking, method of loci, songs and rhymes.
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Read the excerpt from The code book. What part of speech is the underlined word?
Answer:
Adjective
Explanation:
When we say encryption product, the word encryption modifies the noun product. So in this case, encryption is an adjective. It's like when we say apple pie. Apple modifies the noun pie, so in this case, the word apple is an adjective. Another example would be facial expression. Facial in this case modifies the noun, expression.
Answer:
adjective
Explanation:
just did the quiz
Wladimir Köppen’s climate system was developed _____.
before 1850
around 1900
about 1950
after 1990
Answer: before 1850
Explanation:
Fill in the blank spaces on the dna & rna pairing conversion chart ( please help )
Answer:
Here is a chart that with the pairs
Explanation:
The base pairing in DNA and RNA involves the complementary pairing of nitrogenous bases. Adenine pairs with thymine in DNA and with uracil in RNA, while cytosine pairs with guanine in both DNA and RNA. Hydrogen bonds stabilize the base pairs.
Explanation:The base pairing in DNA and RNA involves the complementary pairing of nitrogenous bases. In DNA, adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G). This is known as Chargaff's rule. Similarly, in RNA, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G).
For example, if one strand of DNA has the sequence AGTGCCT, the complementary strand would have the sequence TCACGGA.
The base pairs are stabilized by hydrogen bonds, with adenine and thymine forming two hydrogen bonds, and cytosine and guanine forming three hydrogen bonds.
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How are bacteria different from viruses ?
D. Bacteria can exist outside a host.
Viruses are not able to do this. They are dependent on host cells for reproduction. This is one of the prime reasons why bacteria are classified as living whereas viruses are not.
Hope this helps!!
Bacteria different from viruses D. Bacteria can exist outside a host.
the main difference is that bacteria are free-living cells that can live inside or outside a body, while viruses are a non-living collection of molecules that need a host to survive.
What are 3 differences between viruses and bacteria?Viruses are tinier: the largest of them are smaller than the smallest bacteria. All they have is a protein coat and a core of genetic material, either RNA or DNA. Unlike bacteria, viruses can't survive without a host. They can only reproduce by attaching themselves to cells.
What is worse virus or bacteria?For more information, visit our medical review board. Most bacteria aren't harmful to humans, but most viruses are potentially harmful. Bacteria are living organisms, while viruses are parasitic and need a live host to reproduce
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PLZ HELP!!! NEED RIGHT ANSWERS ONLY
Which is a powdery substance released by the flowers of certain plants, which also one of the most common allergens? A. histamine B. asthma C. pollen D. baking powder
Answer:
uhm C. Flowes have pollen.
Explanation:
C. Pollen!
Flowers release pollen and many people are allergic (allergens) to pollen
Hope this helped!
~Just a girl in love with Shawn Mendes
__is an element found in all organic molecules during respiration, animals excrete it as a gas known as ___
Answer: 1.carbon
2.carbon dioxide
Explanation:All animals exhale out carbon dioxide during respiration. Carbon dioxide is a byproduct of respiration, it Is harmful If it stays in the body for long and needs to be excreted out from the body
Plants instead of excreting out carbon dioxide use it produce glucose and oxygen, that is later on used by the animals themselves
Answer:
Carbon. CO2
Explanation:
Carbon is the common element found in all organic molecules. During respiration, animals excrete (or exhale) carbon in the form of a gas, carbon dioxide (CO2).
Over the last 120 years, the average temperature of the troposphere has _____.
stayed the same
cycled on an annual basis
increased by 0.5ºC
decreased by 0.5ºC
Over the last 120 years, the average temperature of the troposphere has increased by 0.5ºC.
How does a plant obtain energy?
Answer:
Plant cells obtain energy through a process called photosynthesis. This process uses solar energy to convert carbon dioxide and water into energy in the form of carbohydrates. Energy is used to break down carbon dioxide and form glucose, the main energy molecule in plants.
Explanation:
Answer:
Photosynthesis, this process uses solar energy to convert carbon dioxide and water into energy in the form of carbohydrates.
Explanation:
What are the most important animals to the Great Barrier Reef?
sting Ray
plankton
whales
Final answer:
The Great Barrier Reef is a vital marine ecosystem housing critical species such as corals, fish, turtles, and sharks, each playing a unique role in maintaining the reef's health and balance.
Explanation:
The Great Barrier Reef is an extensive and vibrant marine ecosystem off the coast of Australia, known for its richness in biodiversity and its significance to the marine life that calls it home. Among the myriad of creatures, several key species play critical roles in maintaining the health and balance of the reef system.
Coral: Foundation species of the reef, corals are not just structures but living organisms. They are vital for creating the environment in which many reef species thrive. Coral bleaching, a process caused by rising water temperatures, poses a significant threat to these foundational species and, by extension, the entire reef ecosystem.Fish: Fish species contribute to the reef in various ways, including maintaining algae levels, contributing to the coral polyp's diet, and helping to control populations of other marine creatures, ensuring ecological balance.Turtles: These marine reptiles are crucial for nutrient cycling within the reef. By feeding on seagrasses and jellyfish, they help to maintain healthy seagrass beds and control jellyfish populations.Sharks: Acting as apex predators, sharks are essential for maintaining the health of the reef by controlling the population of other marine creatures and removing the weak and sick.Each of these species, along with countless others, contributes to the delicate balance of the Great Barrier Reef, making them crucial for its survival and the maintenance of its biodiversity.
Some traits, such as the color of your eyes and the shape of your nose, are
controlled by and may affect your health and well-being.
Answer:
Is this a True or False question? If not, Them Heredity is the thing that can effect your Features (such as Nose shape and eye color) as well as health and well-being.
However, Health and well being can also be altered, like if you eat too much, or if you get in a car accident, or a loved one dies. Those can change depending on your surroundings.
The behaviors and physical characteristics of species that allow them to live successfully in their environment are called
Final answer:
Adaptations are heritable traits that help organisms survive and reproduce in their environments. Examples include the webbed feet of platypuses for swimming, the thick fur of snow leopards for warmth, and the fast speed of cheetahs for catching prey.
Explanation:
The behaviors and physical characteristics of species that allow them to live successfully in their environment are called adaptations. An adaptation is a heritable trait that enhances an organism's ability to survive and reproduce in its specific environment. Examples of adaptations include the webbed feet of platypuses, which aid in swimming, the thick fur of snow leopards for warmth in cold habitats, and the cheetah's fast speed, which is crucial for catching prey. Scientists explain that adaptations occur through a change in the range of genetic variation over time, improving or maintaining the fitness of a population to its environment.
does an island in the ocean have high or low speciation
Islands can host high speciation rates, particularly when isolation prompts rapid adaptation and variety amongst species. However, smaller islands or those further from the mainland generally see lower speciation due to reduced migration and fewer available niches.
Explanation:Biodiversity on an island results from a combination of
speciation
, migration, and extinction. According to the work of Robert H. MacArthur and Edward O. Wilson on
island biogeography
, islands farther from the mainland generally have lower biodiversity as they are harder to reach, reducing migration rates. Within each island population, the number of species tends to increase over time to levels similar to the mainland source, assuming sufficient time without major disturbances. However, smaller islands, which present fewer niches and support smaller populations, are at a greater risk of extinction and typically see lower speciation rates. Examples of
adaptive radiation
, such as the cichlid fish in Lake Victoria, illustrate how variation can increase rapidly in isolated environments, leading to higher speciation rates.
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At which point along this stream are sediments most likely to accumulate, forming a point bar?
A. 4 B. 3 C. 2
Answer:
B
Explanation:
Which of the following correctly describes how heat moves when it is conducted between objects?
Answer:
Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass. The method used to transfer heat is usually the one that is the most efficient.
Answer:
from warmer objects to cooler objects
Explanation:
When two items with different temperatures come in contact with one another, energy moves from the hotter (higher temperature) object to the cooler (lower temperature) object until both objects reach the same temperature.
The reactants when fossil fuels are burned are shown below. What are the
products of this reaction?
Fosil fuel + oxygen gas
?
Burning fossil fuels create:
Energy and carbon dioxide
Answer: Fossil fuel is burned in the presence of oxygen to release energy and carbon dioxide and heat.
Explanation:
The combustion of fossil fuel release enormous amount of energy in the form of heat which is used to perform various tasks. This process also releases some amount of carbon dioxide.
Fossil fuels are formed by the compression of biomass deep inside the earth that takes thousands years to get converted into fossil fuel.
What process is shown below?
Answer:
Forestation.
Explanation:
When life is created on land where there originally was no life, wind brings over pioneer species, such as grasses. Over time, life takes advantage and grows bushes, trees, and so on.
READ AND HELP!!!!PLEASE!!
A community has only one organism, while a population has many organisms.
Answer is first choice
A study has shown that Scotland's river otter population is increasing after falling
sharply over the last 40 years.
Otters live along the banks of rivers, usually in reeds and gaps between tree roots.
Fish are their main food.
What term is used for the place where otters live?
Answer:
An otter's den is called a holt or couch.
Explanation: Otters are found almost all over the world and in many wet habitats, such freshwater rivers, lakes, oceans, coastlines and marshes. Most otters live in dens — built by other animals, such as beavers — that are dug into the ground that have many channels and dry inner chambers
Final answer:
The place where otters live is called their habitat, which includes river banks with reeds and spaces between tree roots.
Explanation:
The term used for the place where otters live is habitat. River otters typically inhabit environments along the banks of rivers, which provide essential resources such as food, shelter, and a suitable place for raising their young. The main food for otters is fish. Otter habitats include areas with abundant reeds and spaces between tree roots where they can hide and rest. The health and stability of otter populations, like that in Scotland, indicate the overall health of the ecosystem, including the availability of clean water and sufficient prey like fish in kelp beds, and the absence of excessive predation or environmental stressors.
The Krebs cycle and electron transport processes take place within the _____.
mitochondria
lysosome
vacuole
cytoplasm
The answer is Mitochondria
Answer:
The correct answer is: mitochondria.
Explanation:
The Krebs Cycle and the Electron Transport processes are part of a much bigger process with the intent to generate energy for the cell, Cellular Respiration. Cellular Respiration is basically a series of metabolic reactions that produce ATP molecules using glucose as a substrate.
Both the Kreb Cycle and the Electron Transport Chain occur inside the mitochondria. The first two steps of Cellular Respiration, Glycolysis and Pyruvate decarboxylation, happen in the cytosol and the mitochondria, respectively.
Mitochondria are the organelles responsible for ATP synthesis, though they also function as a calcium reservoir, and participate in processes like apoptosis and synthesis of steroids.
Lysosomes are organelles that contain hydrolytic enzymes that break down polymers. Vacuoles (mostly found in plant cells) are vesicles filled with water that also contain materials that can be harmful to the cell. The Cytoplasm is all the material within a cell except for the nucleus.
Question 4 (3 points)
Which of the following is used as evidence in supporting the idea that life changes
over time?
what are the answer choices? i’ll be glad to help if you leave it in the comment section.
Answer:
Where are the questions?
Explanation:
It makes me automatically do this answer format.
Dr. Peterson does an experiment to research the growth rate of mice. He has two groups of mice. He feeds one group a type of food and adds chemical A, which is supposed to increase growth rate. The other group he feeds the same food without chemical A added. His research shows that chemical A increases growth rate by 30%. He does the experiment 4 times and comes up with the same result each time.
Dr. Peterson concludes that chemical A does increase the growth rate of mice. Is Dr. Peterson's conclusion supported by scientific knowledge?
A.
No; scientific knowledge never comes from research or experiments.
B.
Yes; any study that involves a percentage is based on scientific knowledge.
C.
Yes; his conclusion is supported by evidence from his experiment.
D.
No; science cannot be used to research small animals such as mice.
Answer:
C
Explanation:
Which of these is a disadvantage of hydropower?
Answer:
Fish populations can be impacted if fish cannot migrate upstream past impoundment
dams to spawning grounds or if they cannot migrate downstream to the ocean. Upstream fish passage can be aided using fish ladders or elevators, or by trapping
and hauling the fish upstream by truck. Downstream fish passage is aided by
diverting fish from turbine intakes using screens or racks or even underwater lights
and sounds, and by maintaining a minimum spill flow past the turbine.
Hydropower can impact water quality and flow. Hydropower plants can cause low
dissolved oxygen levels in the water, a problem that is harmful to riparian
(riverbank) habitats and is addressed using various aeration techniques, which
oxygenate the water. Maintaining minimum flows of water downstream of a
hydropower installation is also critical for the survival of riparian habitats.
Hydropower plants can be impacted by drought. When water is not available, the
hydropower plants can't produce electricity.
New hydropower facilities impact the local environment and may compete with other
uses for the land. Those alternative uses may be more highly valued than electricity
generation. Humans, flora, and fauna may lose their natural habitat.
Hope This Helps! Have A Nice Day!!
Final answer:
Hydropower has disadvantages such as loss of forest habitat, decomposition of plant material increasing water acidity, and blocking species dispersal which can degrade ecosystems and harm migratory fish.
Explanation:
Disadvantages of Hydropower
One of the disadvantages of hydropower is the environmental impact associated with dam construction and maintenance. Hydropower dams cause loss of forest habitat as extensive areas, including tropical rainforests, can get flooded. This not only destroys the home for many tropical organisms but also affects other land uses and indigenous communities. The decomposition of plant material in reservoirs can increase the water's acidity, leading to erosion of turbines and reducing their lifespan. Additionally, issues like blocking species dispersal, particularly for migratory fish, and sediment buildup behind dams can degrade the ecosystem and lower the beneficial use of these structures.
Which of these actions is a sustainable agricultural practice
A. Cultivating crops that require less water
B. Feeding a large population with factory farming
C. Using water from another region to irrigate crops
D. Using groundwater to irrigate crops
Answer:
A. Cultivating crops that require less water
Explanation:
A sustainable agriculture practice is one that reduced the impact of that human activity on the environment.
A. Cultivating crops that require less water is certainly one sustainable practice because it respects the environment.
B, C and D answers are NOT sustainable practices and put in danger the reserves of water people will need to drink. On top of that, B and C would generate pollution for the transport.
Answer:
A = Cultivating crops that require less water
Station 3! HELP PLS!
1. Animals with backbones belong to the ____ phylum.
A. Cordate
B. Echinoderm
C. Athropod
D. Mollusk
2. Jellyfish and coral belong to the same phylum as ____.
A. Snails
B. Sponges
C. Sea Anemones
D. Fish
3. An animal belonging to the phylum athropoda is a ____.
A. Tapeworm
B. Lobster
C. Squid
D. Slug
4. ____ is the class of athropods which have 8 legs.
A. Arachnid
B. Insect
C. Centipede
D. Cephalopod
Answer:
Arachnid (4)
Explanation:
Note: I am not into this type of science at all, but I try.
I can answer number 4 for you: Arachnid. Arachinds involve animals like spiders, which have 8 legs.
Again, I haven't really gotten into this science yet, it POSSIBLY may be wrong.
The reaction that releases energy for use by the cell occurs in which site?
A. Golgi Apparatus
B. Mitochondrial membrane
C. Endoplasmic reticulum
D. Cytoplasmic membrame
Answer: A. Golgi Apparatus
Explanation:
The reaction that releases energy for use by the cell occurs in Mitochondrial membrane site. So, the correct option is (B).
What is Mitochondria?A mitochondria is a type of organelle which is found in the cells of most eukaryotes, like animals, plants, and fungi. It has a double membrane structure which uses aerobic respiration to generate adenosine triphosphate, which is used throughout the cell as a source of chemical energy.
Functions of Mitochondria are as follows:
Producing energyCell deathStoring calciumHeat productionMitochondria make up over 90% of the energy needed to sustain life and support organ function. Each cell contains hundreds to thousands of mitochondria, which are located in the fluid that surrounds the nucleus (cytoplasm).
Thus, the reaction that releases energy for use by the cell occurs in Mitochondrial membrane site. So, the correct option is (B).
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