Ordovician end (444 million years ago; mya), Devonian, late (360 mya), Final Permian (250 mya), People frequently confuse the end of the Triassic period (200 mya) for the extinction of the dinosaurs.
What is mass extinction?
End of the Cretaceous (65 million years ago), the dinosaur extinction catastrophe. The primary reason for contemporary extinctions is habitat destruction.
Permian and the beginning of the Triassic periods, some 250 million years ago, Earth went through its worst environmental catastrophe ever.
The crater's diameter and depth are estimated to be 180 kilometers (110 miles) and 12 miles.
Therefore, around 252 million years ago, the end of the Permian epoch was marked by the greatest extinction in Earth's history.
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What are the 2 main causes of genetic variation in populations?
Gene flow as well as genetic drift seem to be the two primary drivers of genetic variability.
Genetic variations are adjustments or alterations that occur in the gene order of DNA. Those genetic variants were critical since these drive most living things' evolution. The two primary variables that determine genetic diversity in a population are DNA mutation and sexual reproduction.
A genetic mutation is a change in the DNA sequencing of a gene that leads in the synthesis of a distinct type of product. Through sexual reproduction, two people contribute individual germ cells to produce kids. Variations occur as a result of the offspring acquiring DNA from either parent.
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Explain how the agricultural job market today is different than it was 100 years ago
Agricultural job market today is different than it was 100 years ago because of better technology has allowed farmers to feed more people and requires fewer people to work on farms to feed their families.
The manner that farmers are able to farm and raise food has been greatly impacted by changes in equipment. In the past, farmers had to use hand labour or equipment drawn by horses to complete field work. Over the past 50 years, the agriculture industry has undergone a significant transformation.Farm equipment has become larger, faster, and more productive because to technological advancements, allowing for the more effective cultivation of larger areas. Additionally substantially enhanced, seed, irrigation, and fertilisers have helped farmers boost harvests. The crops on old farms weren't watered by sprinklers. Pesticides to fight off pests and insects weren't available. They lacked tractors.
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Complete the blanks by matching with one of the given terms - A molecule moves down its concentration gradient by passive transport, but requires _________ transport to move up its concentration gradient. - Transporter proteins and ion channels function in membrane transport by providing a ______ pathway through the membrane for specific polar solutes or inorganic ions. - __________ are highly selective in the solutes they transport, binding the solute at a specific site and changing conformation so as to transport the solute across the membran
Answer:
active
hydrophilic
Transporters
Explanation:
A molecule moves down its concentration gradient by passive transport, but requires active transport to move up its concentration gradient. - Transporter proteins and ion channels function in membrane transport by providing a hydrophilic pathway through the membrane for specific polar solutes or inorganic ions. - Transporters are highly selective in the solutes they transport, binding the solute at a specific site and changing conformation so as to transport the solute across the membrane.
How do you think acid rain is forming
Answer:
acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide
how do you know that these kittens come from the same litter?
These kittens come from the same litter because kittens from same litter can look different.
facts about Kittens -
Due to the possibility that kittens from the same litter may have different fathers, certain litters may contain half-brothers and half-sisters. This can occur when female cats have many matings with different males over a short period of time, resulting in multiple pregnancies and one litter.
Brothers are likely to have similar colors because male kittens always inherit their mom's fur color. The coats of female kittens, especially those with different dads, can differ from those of their sisters because they inherit a combination of their mother's and father's coloring.
Kittens will pick up a lot from their siblings throughout the first few months of life. You might notice kittens engaging in competitive play as they practice hunting and other activities with their littermates. Although it can occasionally appear a touch violent, as long as they are each pursuing and pouncing on the other in turn, it is a fantastic way for them to develop new abilities.
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What types of light are reflected by plant leaves?
Plant leaves reflect visible light, and the specific colors of light that are reflected depend on the pigments present in the leaf. Chlorophyll, the pigment primarily responsible for the green color of leaves.
Reflects green light, while absorbing other colors of the visible spectrum such as blue and red. Carotenoids, which are pigments that give leaves their yellow and orange colors, reflect yellow and orange light. And finally, anthocyanins which are pigments that give leaves their red color, reflects red light. Additionally to these pigments, other substances on the leaf surface can also affect the light reflection. It's worth noting that while leaves reflect visible light, they also reflect other type of light such as near-infrared and ultraviolet, but these are not visible to the human eye, however they are important for the plant growth and health.
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Why is eating a well balanced healthy diet important? What are some of the consequences or risks to an unhealthy diet?
*1 paragraph answer*
A balanced diet is necessary for both good nutrition and health. Over time, poor nutrition can increase the chance of contracting certain diseases and other health issues, as well as stress, fatigue, and our ability to function.
Why is eating a well balanced healthy diet important?
A balanced diet is necessary for both good nutrition and health. You are shielded from a variety of degenerative noncommunicable diseases, including cancer, diabetes, and heart disease.
A balanced diet that limits salt, sugar, saturated fats, and trans fats from industrial production is crucial for good health.
How Does Poor Nutrition Affect Us?
Our capacity to live a fulfilling and active life can be hampered by poor nutrition, which can also affect our everyday health and wellness.
Over time, poor nutrition can increase the risk of contracting certain diseases and other health issues, such as being overweight or obese or having tooth decay. In the short term, poor nutrition can increase tension, fatigue, and our ability to work. blood pressure is high. elevated cholesterol Type-2 diabetes, heart disease, stroke, osteoporosis, and certain malignancies disordered eating and depression.
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Which of the following is not a factor in the regulation of cell division in normal cells?
a. Growth factors enter the cell nucleus
b. Signals are transduced from cell surface to cell nucleus
c. Transcription factors are recruited
d. Growth-inhibiting factors promote the synthesis of proteins that inhibit cell division
Growth factors entering the cell nucleus are not a factor in the cell division regulation in normal cells. Therefore, option a is correct.
The word "growth factor" refers to a group of gene products that are crucial in controlling cell division and tissue proliferation. There is a unique cell receptor for each growth factor.
Growth factors can act on particular cell surface receptors, which then relay their signals to various intracellular components and ultimately lead to altered gene expression. When a growth factor binds to a receptor, cell division can begin or be blocked in particular circumstances.
They attach to the receptor and function as signaling molecules. To have the desired effect, the activated receptor in turn activates an intracellular protein. They don't enter the cell nucleus instead act on the cell surface receptors.
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What happens to the amount of nutrients needed as a cell increases in volume?
As the volume of a cell increases, so does its need for nutrients. This is because larger cells require more energy, as well as more materials, to sustain their increased size. In order to keep up with the increased demand for energy, larger cells must absorb more nutrients, including proteins, carbohydrates, lipids, and other essential molecules.
The two primary methods by which cells acquire nutrients are diffusion and active transport. Diffusion is a passive process that occurs when molecules move from an area of higher concentration to an area of lower concentration. This process occurs in cells and can provide the necessary nutrients for growth and maintenance. However, diffusion becomes increasingly inefficient as the cell size increases due to the increased distance the molecules must travel.
Active transport, on the other hand, is an energy-driven process in which molecules are actively transported into the cell from an area of lower concentration to an area of higher concentration. This process allows for the rapid transport of larger molecules and the more efficient uptake of nutrients. As the volume of the cell increases, more active transport is needed to provide the necessary nutrients. This can be seen in the process of endocytosis, where the cell engulfs nutrients from the environment and transports them into the cell.
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where were fossils found in the mississippian time period
Answer:
Mississippian fossils are abundant in portions of the Midwest and South and include vast beds of limestone and marble.
Explanation:
For example, the domed ceiling of the Jefferson Memorial in Washington, D.C., is made of Indiana limestone that was deposited during the Mississippian Period.By the end of the Carboniferous, reptiles had migrated well toward the interior of Pangea. These early pioneers went on to spawn the archosaurs, pelycosaurs, and therapsids of the ensuing Permian period. (It was the archosaurs that went on to spawn the first dinosaurs nearly a hundred million years later.)
A young goat has downward-curved horns. Its father has upward-curved horns while its mother has downward-curved horns. Which of these statements is the explanation?
A young goat has downward-curved horns. One copy of the gene for horn shape was passed down to the young goat from its father and one copy from its mother is the explanation.
A ratio of dominant to recessive traits is the result of the gene combination from the parents, as stated by Mendel's second law of inheritance, which states that a pair of traits segregate independently of another pair during gamete formation. In phenotype sharing, the offspring will only exhibit the dominant trait when parents with required traits are crossed together. This suggests that the dominant mother and not the dominant father passed on the horn-shaped gene to the young goat.
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Don't search write in your own words please I have a lot of different work
Mullerian mimicry is a type of mimicry found in nature in which two or more species of animals have evolved to share similar warning signals to potential predators.
What is mimicry?
Mimicry is a behavior in which an animal or person imitates the behavior or appearance of another animal or person. Mimicry can be used for protection, deception, or to attract members of the same species. Examples of mimicry include a bird imitating the call of another species, or a person imitating the behavior of someone else to fit in.
This type of mimicry is named after the German biologist Johann Friedrich Theodor Muller who first described it in 1878. The purpose of this type of mimicry is to increase the effectiveness of the warning signal by making it more likely that predators will recognize it and avoid the mimicking species.
Chemical toxins
Chemical toxins are chemical substances that are toxic to living organisms. They can be naturally occurring, such as toxic metals or plant toxins, or artificially created, such as pesticides or industrial chemicals. Chemical toxins can have a variety of effects on organisms, ranging from mild irritation to death.
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Needs help ASAP
Which of the following is an example of genetic engineering?
A. A string of three bases within an RNA molecule codes for a specific amino acid
B. A string of amino acids bonds together to form a protein that controls a trait
C. A bacterial cell produces human insulin because human DNA has been added to the bacterial DNA
D. And the nucleus of a human cell DNA strands separate and are used as a template for new RNA molecules
A bacterial cell produces human insulin because human DNA has been added to the bacterial DNA is an example of genetic engineering.
What do you mean by genetic engineering?Genetic engineering, also called genetic modification or genetic manipulation, is the modification and manipulation of an organism's genes using technology.
For example, genetic engineering may involve adding a gene from one species to an organism from a different species to produce a desired trait. Used in research and industry, genetic engineering has been applied to the production of cancer therapies.
Genetic engineering is accomplished in three basic steps. These are (1) The isolation of DNA fragments from a donor organism; (2) The insertion of an isolated donor DNA fragment into a vector genome and (3) The growth of a recombinant vector in an appropriate host.
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The viscosity of the synovial fluid is due to synoviocyte secretion of mucopolysaccharide, which contains:
The viscosity of the synovial fluid is due to the secretion of mucopolysaccharides by synoviocytes. These mucopolysaccharides are composed of hyaluronic acid, chondroitin sulphate, and heparin sulphate.
The viscosity of synovial fluid is due to the secretion of mucopolysaccharides (MPS) by synoviocytes. These MPS are composed of three main components: hyaluronic acid, chondroitin sulphate, and heparin sulphate. Hyaluronic acid is a linear polysaccharide that is an essential component of the extracellular matrix of the joint. It plays an important role in lubricating and cushioning the joint, and it is believed to be responsible for the viscosity of the synovial fluid.
Chondroitin sulphate, another component of the MPS, is a glycosaminoglycan that helps to maintain the structural integrity of the joint and acts as a shock absorber. Lastly, heparin sulphate is a polysaccharide that helps to regulate the coagulation of the synovial fluid, thus preventing it from becoming too thick.
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La meteorizacion mecánica se lleva a cabo por fuerzas físicas mientras que la meteorizacion química transforma en compuestos nuevos la roca.
Answer:
Si.
Explicación:
La meteorización mecánica transforma la roca mediante el uso de fuerzas físicas, mientras que la meteorización química transforma la roca en nuevos compuestos con el uso de productos químicos. Hay ciertos productos químicos que rompen los enlaces entre las partículas de roca que conducen a la erosión de la roca. Los productos químicos presentes en la lluvia y el agua en movimiento que reaccionan con las rocas y los minerales cuando entran en contacto provocan que la roca cambie o debilite.
Many scientists claim that the synthesis of the first organic molecules from inorganic precursors was possible because of the highly reducing atmosphere found on primitive Earth.
Which of the following is an appropriate null hypothesis that could be used when investigating the claim?
answer choices
The synthesis of organic molecules from inorganic molecules is possible under current atmospheric oxygen levels as well as those found on primitive Earth.
Organic molecules were transported to primitive Earth by a meteorite or other celestial event.
The absence of a significant quantity of atmospheric oxygen is required for the synthesis of organic molecules from inorganic precursors.
The level of atmospheric oxygen on modern Earth is significantly higher than on primitive Earth.
The synthesis of organic molecules from inorganic molecules is possible under current atmospheric oxygen levels as well as those found on primitive Earth is an appropriate null hypothesis that could be used when investigating the claim.
The hypothesis that organic molecules can be synthesized from inorganic molecules under current atmospheric oxygen levels, as well as those found on primitive Earth, is an important one to consider when researching the claim that life could have originated on the planet.
This null hypothesis provides evidence that organic molecules can form without the presence of life, allowing us to explore the possibility of life's origin on Earth in a more comprehensive manner.
By studying the various chemical reactions and processes involved in the synthesis of organic molecules, we can gain a better understanding of the conditions that were necessary for the emergence of life.
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The pump is dictating rather than facilitating your work. The pump could malfunction. There is no risk associated with the pump. A and B (The pump is dictating rather than facilitating your work AND The pump could malfunction)
The pump is essentially controlling the process instead of helping it. This means that the pump is not providing any assistance with the work, but is instead taking control of the process and not allowing any manual intervention.
This can be a problem because the pump could malfunction, which would mean that the process would be stopped in its tracks. If the pump malfunctions, it could be difficult or impossible to repair it and the process could be stalled until a new pump is brought in. This means that the process would be disrupted and could take a long time to get back on track.
In addition, the malfunction could cause other problems, such as leaking or failing to provide the necessary pressure. Thus, it is important to have a reliable pump that is up to the task in order to make sure that the process is smooth and efficient.
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__________ are lethal and non-lethal tools and systems available to the joint force that produce effects within the Area of Operation (AO)
Fires are lethal and non-lethal tools and systems available to the joint force that produce effects within the Area of Operation (AO).
The use of weapon systems to produce a specific lethal or nonlethal effect on a target is referred to as "firing" in Army doctrine. In order to produce precise lethal and non-lethal effects, army fires systems are entrusted with delivering fires in support of offensive and defensive operations. The flames warfighting function must complete three crucial tasks in order to do this. Deliver one fires 3 Conduct targeting and 2 Include all Army, Joint, and Multinational Fires. 3 In addition, fires help operational forces seize, hold onto, and use the initiative while boosting freedom of action and the ability of ground forces to move and maneuver.
Mobile defense, area defense, and retrograde are the three categories of defensive activities. Both the tactical and operational spheres of combat are affected by all. By allowing the opponent to approach into a position where he may be attacked from behind, mobile defenses aim to defeat invading forces.
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Where is ground tissue found in a plant?
In the soft parts of leaves, stems, and roots
On the entire outer surface of the plant
At the tips of shoots and root caps
In clusters of vascular bundles in the stems
Answer:
The ground tissue system is found within each plant organ. Within leaves, the ground tissue system consists of palisade mesophyll, which are tightly compacted cells that are the site of photosynthesis. Within plant stems, the ground tissue consists of the cortex (outer stem layer) and pith (spongy stem center).
Explanation:
Answer:
in the soft parts of leaves, stems, and roots
Explanation:
How cloud computing reduces energy consumption?
Cloud computing can reduce energy consumption by optimizing the physical environment (think cloud computing facilities in cold climates), cutting the power spent to cool the servers.
Cloud computing has several advantages. B. Businesses can efficiently store, protect, and analyze large amounts of data. Cloud computing can significantly reduce energy consumption, waste, and greenhouse gas (GHG) emissions. The
data center is best known for cloud computing and contains a collection of servers that store business information and run applications.
Idle servers and resources in data centers waste a lot of energy. Energy is wasted when the server is overloaded. There are few techniques for load balancing, VM virtualization, VM migration, resource allocation, job scheduling, etc. used to solve the problem.
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what does density mean?
Answer:
the awneser is gxgjhgkytxtrjdctgxjrjgfcfcyf
Explanation:
i save peoples lives today
which of these is a structural adaptation a.) a pointed beak b.) swarming, c.) the ability to hunt, d.) migrating
Explanation:
Option A is the correct i.e a pointed beak .
Josie partially filled a graduated cylinder with water. she then dropped a rock into the water. the illustration below show what happened to the level of the water inside the graduated cylinder. what is the volume of the rock?
As the the illustration show volume of the rock is 5ml. The correct option is A.
What is volume?The space occupied within an object's borders in three dimensions is referred to as its volume.
It is sometimes referred to as the object's capacity. Volume is the amount of space an object or substance occupies.
Volume, which is measured in cubic units, is the 3-dimensional space occupied by matter or encircled by a surface.
Since the graphic shows that 5 ml of water was displaced by the rock, we can infer that the rock's volume is 5 ml.
Thus, the correct option is A.
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Your question seems incomplete, the complete question is:
Josie partially filled a graduated cylinder with water. She then dropped a rock into the water. The illustration below shows what happened to the level of the water inside the graduated cylinder. What is the volume of the rock?
answer choices
5 mL
10 mL
35 mL
40 mL
What were Mendel's 3 important choices?
Answer:
The law of segregation, the law of dominance, and the law of independent assortment
Explanation:
He formulated several basic genetic laws, including the law of segregation, the law of dominance, and the law of independent assortment
why do we need sex cells to have half the number of chromosomes
What was Mendel's hypothesis?
Mendel proposed that allele pairs randomly segregate from one another when the gametes are being produced in the seed plant (egg cell) and pollen plant (sperm). A sperm or an egg only contains one copy of each allele for each inherited characteristic because allele pairs split apart during gamete development.
Mendel's idea proposed that genes arrive in pairs and are inherited from each parent as independent entities. Mendel observed how parental genes separated and if they showed up as dominant or recessive features in children. He discovered patterns of heredity passed down mathematically from one generation to the next.
He put up the particle inheritance idea as a substitute theory. The inherited phenotypes, according to his prediction, do not converge across generations. Instead, he proposed that the progeny get distinct "particles."
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What is the correct term for variation in characteristics within populations of the same species?
Phenotypic variation is the differences among the genomes of different members of the same species. A genome is composed of all the hereditary information, all the genes of an organism.
What is Phenotypic variation?Phenotypic variation is the variability in phenotypes which exists in a population. These are the result of genetic variation in an individual. For example, people come in all types of shapes and sizes including height, weight, and body shape are the common phenotypes that vary. Hair, eye color, and the ability to roll the tongue are observable variable phenotypes, too.
Phenotypic variation is the sum total of all the variations in characteristics within populations of the same species. In contrast, the genotypic variation is the sum total of all the variations such as allele frequency which are present in the genome of populations of the same species.
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2. Which material is found near yolcanoes?
A. Coal
B. Oil
C. Freshwater
D. Metal
Answer:
the answer is D. Metal..
Answer:
Metal
Explanation:
What would happen if the active site of an enzyme has a different shape ?
If the enzyme changes shape, the active site may no longer be able to bind to the right substrate, which would slow down the activity. In response to abrupt pH and temperature fluctuations, enzymes eventually denature.
Enzymes accelerate processes by reducing the activation energy of certain reactions, just like other catalysts do. The rate of substrate to product conversion can be multiplied by ten by some enzymes. Orotidine 5'-phosphate carboxylase is an extreme example, accelerating a reaction from millions of years to milliseconds. Enzymes are similar to any catalyst chemically speaking and neither consume substances in chemical reactions nor change the equilibrium of a reaction. Enzymes are much more specialized catalysts than the majority of other catalysts.
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How does an increase in cell size affect ratio of surface area?
As the cell radius increases, the surface area increases as the radius squared, but the volume increases as the radius cubed (much faster). Therefore, as the cell size increases, the surface area to volume ratio decreases.
Cell proliferation reduces the surface area to volume ratio. This is because as a cell grows, its volume (its internal contents) increases faster than its surface area (its cell membrane).
As cells grow larger, the surface area to volume ratio decreases dramatically, similar to an agar cube. Larger cells have to transport substances across membranes, but they deliver a larger volume and a proportionately smaller surface area.
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