Answer: Law of superposition.
Explanation: The law of superposition is an axiom that can be used as the basis of geology and archaeology.
This is a form of relative dating which can be used to determine the age of the rock. It states that the oldest layer will be at the bottom of the sequence and the newest layer formed will be at the top of the sequence.
Buying books and piling the books after reading them shows the law of superposition.
Which is a renewable source?
A) oil
B) wood
C) Iron
D) coal
Whats the tone for uncle toms cabin
Why are invasive species dangerous to the environment?
Answer:
Invasive species do not have natural predators and therefore usually overgrow, invading other species habitat and breaking the normal ecosystem process.
Explanation:
When a species its brought by human mistake to a new environment where they can successfully adapt and grow. This invasive species can usually reproduce and grow rapidly, using many resources and therefore affecting the native species. Part of their success its because in many cases, they do not have natural predators or pests. A well known example its the introduction of the Lionfish to the Caribbean Sea.
The invasive species are dangerous to the environment because they disrupt the organisation of the ecosystem.
What are invasive species?The invasive species are those organisms that are are introduced into an ecosystem without a natural predators that helps to monitor it's growth.
They are dangerous to the ecosystem because of the following reasons:
They are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.Learn more about ecosystem here:
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Cigarette smoking is a factor in causing all of the following conditions except
Chronic stress.
Hope this helps!
Chronic Stress
Is your answer :D
When DNA is extracted from E. coli cells and analyzed for base composition, it is found that 42% of the bases are cytosine. That means that there is also 42% of which base?
Guanine
When DNA is extracted from E. coli cells and analyzed for base composition, it is found that 42% of the bases are cytosine. That means that there is also 42% of guanine base.
Explanation:According to chargaff's rule :
DNA from any cell of all organisms should have a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.
In DNA, cytosine (C) always pairs with guanine (G), hence if 42% of the bases are C, then 42% would also be G according to Chargaff's rule.
Explanation:In DNA, the four bases adenine (A), thymine (T), cytosine (C), and guanine (G) pair up in a specific manner due to their shapes and charges. This is known as Chargaff's rule, which states that adenine always binds with thymine (A=T) and cytosine always binds with guanine (C=G). Therefore, if 42% of the bases in DNA extracted from E. coli cells are cytosine, then 42% of the bases would also have to be guanine as they form complementary pairs.
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WHAT PROCESS ALLOWS A SPECIES TO LIVE IN ITS NICHE?
a ) EVOLUTION
b )REGRESSION
C)REPRODUCTION
d) COMPETITION
Answer:
a ) EVOLUTION
Explanation:
Describe the structure of a mitochondrion.
The outer membrane is technically the skin and covers the organelle.
The inner membrane folds over many times and creates layered structures called cristae.
:)
Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy-rich molecules for the cell.
Mitochondria Structure
Mitochondria are shaped perfectly to maximize their productivity. They are made of two membranes. The outer membrane covers the organelle and contains it like a skin. The inner membrane folds over many times and creates layered structures called cristae. The fluid contained in the mitochondria is called the matrix.
The folding of the inner membrane increases the surface area inside the organelle. Since many of the chemical reactions happen on the inner membrane, the increased surface area creates more space for reactions to occur.
Wegener used the fossil deposits of coal in Antarctica as a line of evidence for:
According to evolutionary scientists, animals that arose later in evolutionary history share which characteristic?
Later animals in evolutionary history share homologous characteristics within smaller groups derived from a common ancestor, showcasing descent with modification. Evolutionary advantages are expressed through competition and reproduction, impacting population genetics. Modern phylogenetics employs genetic, molecular, and morphological data to map these evolutionary relationships.
According to evolutionary scientists, animals that arose later in evolutionary history typically share homologous characteristics that have developed more recently and are observable within smaller, more closely related groups of organisms. As the phylogenetic tree of life demonstrates, through the concept of descent with modification, related organisms inherit many of the same characteristics and genetic codes from a common ancestor. However, over time, these characteristics undergo changes which aid in the organism's survival.
Evolution of any particular characteristic, such as sharper teeth or greater intelligence, requires that characteristic to be expressed and benefit the organism's survival and reproductive success. This process involves mature individuals competing and surviving long enough for these advantageous traits to make a significant impact on the population. Hence, animals with superior traits tend to live longer and breed more.
Modern phylogenetics integrates genetic and molecular analyses along with morphological and fossil data to determine evolutionary relationships among animals. This has greatly enhanced our understanding of the animal evolutionary tree, helping distinguish between homologous characteristics that reflect shared ancestry and analogous characteristics that may arise independently in unrelated species due to convergent evolution.
Describe how DNA is coiled and eventually supercoiled to condense it into chromosomes.
Double-stranded DNA loops around 8 histones twice, forming the nucleosome, which is the building block of chromatin packaging. DNA can be further packaged by forming coils of nucleosomes, called chromatin fibers. These fibers are condensed into chromosomes during mitosis, or the process of cell division.
Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
During DNA packaging, long pieces of double-stranded DNA are tightly looped, coiled, super coiled, and folded so that they fit easily within the cell. This highly compacted DNA is then arranged into structures called chromosomes.
How would the H-zone in a contracted sarcomere differ from that of a relaxed sarcomere?
The H-zone in a contracted sarcomere differ from that of a relaxed sarcomere because H-Zone is narrower in contracted sarcomere. In a striated muscle sarcomere is small unit of myofibril. Between two Z line sarcomere is the repeated unit . Sarcomere is the very basic unit that makes up our skeletal muscle.
Answer:
H-zone is shortened in contracted sarcomere and regains its length in relaxed sarcomere
Explanation:
Sarcomere is the unit of striated muscle tissue. Its contraction and relaxation makes the muscle contract or relax. It is present between two Z-lines. Actin filaments anchor on Z-lines. Next to Z-line is the I-band which is a region of only actin filaments. Next to I-band is A-band region where both actin and myosin filaments are present. Within A-band, H-zone is present. H-zone does not have actin filaments and only consists of myosin filaments.
When a sarcomere contracts, the I-band and H-zone shorten which brings the Z-lines closer. Myosin binding sites are also uncovered on actin filaments and cross bridges are formed between them.
Reptiles and birds excrete waste as an insoluble white solid tyst is called uric acid. How does this help to maintain internal homeostasis in hot climate?
Excreting urea helps in maintaining internal homeostasis by retaining water.
The mammals like humans excrete urea, while reptiles and birds, and some terrestrial invertebrates generate uric acid as waste. Generating uric acid in place of urea is beneficial as it is less toxic and diminishes water loss and the subsequent requirement for water.
This retention of water helps birds and reptiles to sustain internal homeostasis mainly in hot weather.
Answer:
RETAINING WATER
Explanation:
Describe what is happening to the chromosomes during each sub-phase of Meiosis I and Meiosis II.
The spindle gradually lenghtens during prophase.Towards the end of the prophase stage,the nuclear envelopes break down,and each of the microtubules reach from each cell pole to the cell's equator an
The correct term for a male fox is?
A female fox is called a “vixen”, a male fox is called a “dog fox” or a “tod” and baby foxes are called “pups”, “kits” or “cubs”. A group of foxes is called a “skulk” or a “leash”.
dogs ,tods, or reynards
How is Earth's surface likely to change along the edges of a bend in a river channel?
Erosion takes place along the inner edge as water flows relatively slowly.
Erosion takes place along the outer edge as water flows relatively fast.
Deposition takes place along the inner edge as water flows relatively fast.
Deposition takes place along the outer edge as water flows relatively slowly.
i think that the answer is Deposition takes place along the inner edge as water flows relatively fast. hope this helps
A river flowing down a straight path will be moving the fastest in the middle of the river, just below the surface. But if that river approaches a bend, the speed changes.
SINCE FAST MOVING WATER DOES MORE EROSION, THE FAST OUTSIDE BEND IS WHERE EROSION OCCURS ON A RIVER
THE SLOWER INSIDE PART OF THE BEND IS WHERE DEPOSITION OCCURS ON A RIVER.
OUTSIDE BEND = FAST = EROSION
INSIDE BEND = SLOW = DEPOSITION
At this boundary, crust is neither created nor destroyed.
Movement along this boundary leads to crumpling, lifting, and folding of earths crust in the area where the plates are in contact.
An arc of volcanic islands is often formed in the subduction zone at this boundary.
Transform boundary – this type of fault is found where two tectonic plates are moving alongside and parallel to each other mostly in opposite directions. This type of fault is also responsible for the rift valley and block mountains. No crust is destroyed nor new crust formed.
Convergent boundary – At this point, two tectonic plates are colliding because they are moving in opposite directions at each other. The pressure and stress of the collision force causes the plates to begin crumpling and folding at the boundary forming features such as fold mountains (an example is the Himalayas).
Convergent boundary – At this boundary , the denser of the two colliding tectonic plates (usually the oceanic plate) is subsided by the less dense one (usually the continental plate). The plate being subsided begins to melt as it does down into the mantle and becomes liquid rock. This magma rises through the fissures formed at the boundary and erupts into volcanic islands along the boundary.
Answer:
transform boundary, continental-continental convergent boundary, oceanic-oceanic convergent boundary.
Explanation:
plato / edmentum 100 percent.
at this boundary, crust is neither created nor destroyed: transform boundary
movement along this boundary leads to crumpling, lifting, and folding of earths crust in the area where the plates are in contact: continental-continental convergent boundary
an arc of volcanic islands is often formed in the subduction zone at this boundary: oceanic-oceanic convergent boundary
Which part aerobic respiration requires oxygen in order to take place
Aerobic respiration requires oxygen specifically during the electron transport chain, which is the final stage of this process occurring in the mitochondria. Oxygen serves as the final electron acceptor, facilitating the production of ATP and water as byproducts.
Explanation:Oxygen's Role in Aerobic RespirationThe part of aerobic respiration that requires oxygen is the electron transport chain. This stage of cellular respiration is crucial for producing the bulk of ATP (adenosine triphosphate) and occurs after glycolysis and the Krebs cycle. In aerobic respiration, oxygen acts as the final electron acceptor in the electron transport chain. Without oxygen, the high-energy electrons from NADH and FADH2 could not be passed down the chain, which is essential for producing ATP. The oxygen attracts the electrons down the electron transport chain and in the process, combines with hydrogen ions to form water, which is a byproduct of this reaction. This process occurs in the mitochondria, the powerhouse of the cell, and is pivotal for extracting maximum energy from glucose.
For organisms living in environments rich in oxygen, such as humans, aerobic respiration is an efficient way to generate energy. We breathe in oxygen which is then transported to our cells for use in aerobic respiration. It's important to note that during intense activity when oxygen becomes scarce, our muscles may temporarily switch to anaerobic glycolysis, leading to the production of lactate and a lower yield of ATP.
Which species is most vulnerable to extinction the mountain gorilla or raccoons? Give at least 3 reasons why.
Mountain Gorilla because they are worth more than raccoons since you see raccoons almost everyday. They hunt animals for fur to sell, so the gorilla would be more costly since it's harder to find and kill.
Yes i agree Mountain gorlla are rare species that you dont hear everyday. its pretty normal to hear ahh a racoon. This is why mountain gorillas is the most vulnerable species to go extinct!
Westerlies blow at a curve between 10 and 60 degrees north and south of the equator. What prevents these winds from blowing in a straight line? A. Earth spinning on its axis B. Mountain ranges C. Earth revolving around the sun D. Doldrums
The correct answer is option A, that is, the Earth is spinning on its axis.
The westerlies refer to the prevailing winds that blow from the west to the east in the mid-latitudes, that is, in between 10 and 60 degrees. The wind blows from the regions of higher pressure to the region of lower pressure, but it does not blow in a straight line.
This is generally because the Earth is rotating on its axis. The spin of the Earth makes winds to bend towards the right in the northern hemisphere and towards the left in the southern hemisphere. This is known as the Coriolis effect.
Answer:
earth spinning on its axis
Explanation:
Orogenesis is a _____.
general term for the process that produce mountains.
Which compound is inorganic?
It's KH2PO4(Mono Potassium Phosphate).
Which is a product of the light reaction?
Answer: NADPH and ATP
Explanation:
The mechanism of photosynthesis can be divided into two phases, light reaction, and carbon fixation. During the light reaction, photosynthetic pigments absorb radiant energy and undergo a series of photochemical reactions and convert the trapped energy into chemical energy which is stored in the form of NADPH and ATP. These two compounds constitute the assimilatory power. Light reaction is light dependent and it takes place in the grana of the chloroplast.
What are some basic steps to saving tropical rainforests?
You can tell and teach people about the unique animals that live there. You can also encourage others to help. Lastly as a basic step, you could make a support group. Ex; a walking group for rain forests.
Saving the tropical rainforest involves taking steps toward forest, wildlife and environmental conservation. Basic steos to be taken include :
Encourage tree planting to replace cut down trees. Enhancement of forest reserves in other to protect wildlife. Keeping to environmental conservation ethics.Trees are a major part of the tropical rain forest as they serve various purposes including being a niche which supports animals and birds.
Wild life conservation can be upheld by taking steps which prevents wildlife extinction, these include forest reserve optimization.
Therefore, all these steps are more are key to saving the tropical rainforest.
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Which graph is a quadratic graph?
Answer:
A.
Explanation:
We are given graph in the figure.
We have to find a quadratic graph
Quadratic function: It is that function in which degree of polynomial is 2.
Quadratic function is given by
[tex]ax^2+bx+c[/tex]
Quadratic graph: it is defined as that graph which is like as parabola along y- axis , along x- axis, along negative x- axis and along negative y- axis.
In option A: The given graph is parabola along y- axis.Therefore, it is quadratic graph.
Hence, option A is true.
In option B: the graph is not the graph of parabola.So,given graph is not quadratic graph.
Hence, option B is true.
In option C:It is graph of line .The equation of line [tex]y=mx+c[/tex]
It is not a quadratic equation .Hence, the graph is not quadratic graph.
Therefore, option C is false.
In option D: The given graph is not like as parabola along any axis.
Therefore, it is not a quadratic graph.
Hence, option D is true.
list all the similarities and differences of a plant cell and an animal cell
Plant Cell and Animal Cell:
both eukaryotichave membrane bound organelles:Both have nucleus, mitochondria, endoplasmic reticulum, cytoplasm, golgi apparatus (or golgi body), ribosomes, and cell membranes.Both go through cellular respirationPlant Cell Only:
Cell wallLarge central vacuoleChloroplastsGoes through two processes, cellular respiration and photosynthesisAutotrophsAnimal Cell Only:
LysosomesOnly go through the process of cellular respirationHeterotrophsHope I helped! :)
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. ... Plant cells can be larger than animal cells.
Which is NOT a characteristic of a gymnosperm? A. seeds not enclosed in fruit B. seeds enclosed in fruit C. cones D. needle-like leaves
The characteristic of a gymnosperm that is NOT present is seeds enclosed in fruit.
Explanation:The characteristic of a gymnosperm that is NOT present is B. seeds enclosed in fruit. Gymnosperms have seeds that are not enclosed in an ovary or fruit. Instead, they are partially sheltered by modified leaves called sporophylls. Cones and needle-like leaves are characteristic features of gymnosperms.
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Meiosis makes four _________ cells.
Answer:Haploid
Explanation:
It is a type of cell division.which reduces the chromosome number by half which creates four haploid cells.
These four haploid cells are are genetically distinct from their parents cell that gives rise to them.
This process takes place in all the eukaryotic species which includes human beings, animals et cetera.
Error during the process of meiosis can result in various types of deformities in the body.
What dilution of Staphylococcus is required if the initial concentration of the broth culture is 5.8*10^8 cells/ml and your goal is to have a spread plate with 98 colonies when 0.1ml is plated?
Answer:
It can be calculate with the help of formula:
[tex]\frac{\text{Number of CFU}}{\text{Volume plated (ml) x total dilution used}} = \text{Number of CFU per mL}[/tex]
where, number of CFU is given as 98,
Volume plated = 0.1mL
Number of CFU per mL = [tex]5.8\text{ x }10^{8}\text{ cells per mL}[/tex]
Hence, [tex]\frac{98}{0.1 \text{ x total dilution used}} = 5.8 \text{ x } 10^8[/tex]
⇒total dilution used = [tex]\frac{98}{0.1 \text{ x }5.8\text{ x } 10^{8}}[/tex]
⇒total dilution used = [tex]\frac{98}{58}[/tex] x [tex]10^{-6}[/tex]
⇒total dilution used = [tex]1.69\text{ x }10^{-6}[/tex]
how could a change to an ecosystem increase the caring capacity for one species and decrease it for another? Include an example in your answer.
DISASTERS . Can change a group of animals envireonment and can make a new environmetn for a new community
Answer:
could increase the carrying capacity for one species because they would be consuming the other species a lot and growing larger in population, while the other species would decrease dramatically because they are being hunted. An example of this would be the introduction of the invasive species lionfish that began growing a lot because they were eating a lot of the other species, and the other species began dying out and decreasing in population.
Piper touches a block of ice, and she feels that it is very cold. How does she feel the sensation of cold?
A.
The nerves in the finger stop producing action potentials across synapses.
B.
The nerves in the finger detect stimuli and send the message to the brain.
C.
The nerves in the finger signal the arteries to stop circulation to the area.
D.
The nerves in the finger send a reflexive action through the spinal cord.
B.the nerves in the finger detect stimuli and send the message to the brain
Hope this helps
The correct answer is option B
The Piper touches a block of ice and she feels that it is very cold, this sensation is felt as the sensation of cold.
This is because, the nerves in the finger detect stimuli and sends the message to the brain.
The external stimuli is recognized by the nerves present on the finger and then these nerves sends the message to the brain regarding the sensation.
This message is recognized by the brain and detected as cold sensation.