Multiply 5730 years by 2 since two half-lives have gone by for carbon.
Explanation:
The half-life of a radioactive isotope depicts the measure of time that it takes half of the isotope in an example decay. On account of radiocarbon dating, the half-existence of carbon 14 is 5,730 years
The half-life of carbon-14 is 5730 years.
In this manner, after
1 half-life there is 50 % = 1/2 of the first amount left.
2 half-lives there is 25 % = 1/4 of the first amount left.
25% is two half-lives.
Every 50% of life requires 5730 years.
So two half-lives require 2 × 5730
What was the reaction when the cell theory was first introduced.
Answer:
Many scientists opposed the "cell theory" when it was first introduced because they believed that even "non-living matters" could produce or generate a living tissue. This was called "spontaneous generation." The appearance of the fly's larva (maggots) on meat supported this belief of theirs.
It was Louis Pasteur who was able to disprove this concept.
Explanation:
The discovery of cell came about when the microscope was invented. It was first discovered by Robert Hooke, an English natural philosopher in the 1600s. However, he wasn't really sure about the structure and function of the cell during his time. It was Anton van Leeuwenhoek, a Dutch scientist, who proposed that "motility" is a quality of life.
Developing the cell theory was credited to Theodor Schwann and Matthias Schleiden.
The plasma membrane is how many layers?
Answer:
Plasma membrane contains 2 layers
Explanation:
Plasma membrane is extremely pliable structure composed of two layers of phospholids. Cholesterol are also found in between the phospholipids.
The plasma membrane is a lipid bilayer that surrounds the cell. It is approximately 6 to 8 nanometers thick and is made up of phospholipids, proteins, cholesterol, and carbohydrates. Its main function is to regulate the movement of substances into and out of the cell.
Explanation:The plasma membrane is a lipid bilayer composed of two layers of lipid molecules. It is the thin boundary that surrounds the cell, separating the inside from the outside. The plasma membrane is approximately 6 to 8 nanometers thick and is made up of phospholipids, proteins, cholesterol, and carbohydrates. It is responsible for regulating what enters and exits the cell.
What phase is Homologous chromosome paired.
In metaphase I of meiosis I, the pairs of homologous chromosomes, also known as bivalents or tetrads, line up in a random order along the metaphase plate. The random orientation is another way for cells to introduce genetic variation.
Where do the axons that enter the cortico-spinal tract originate? (The complete answer should include more than one of Brodmann’s areas.)
Answer:
From the main motor cortex, Brodmann region 4 premotor areas and the primary somatosensory cortex .
Explanation:
The corticospinal tract originates in many regions of the brain, including
the motor regions, main somatosensory cortex pre-motor regionsThe corticospinal tract allows for voluntary control of motor functions.
30% of the neurons in the corticospinal regions are found in the primary motor cortex. 40% are split up in several regions; the parietal lobe, somatosensory cortex and the cingulate gyrus.
The axon is a tube enclosed in and insulated by the myelin sheath. It serves as a link to impulses for certain neurons that often comprise axon hillocks that are junctions between the axon and the cell body.
what is heredity and how does it relate to genetics
Answer:
Heredity is a process from which traits are transferred from parents to offspring and it is related to genetics because trades are controlled by genes known as genetic code which code the traits.
Explanation:
Which process produces carbon dioxide?
evaporation
cellular respiration
precipitation
photosynthesis
Answer:
Cellular respiration
Explanation:
Evaporation is h20 = oxygen and hydrogen, precipitation is rain, photosynthesis produces oxygen
Answer: cellular respiration
Explanation:
In cellular respiration, glucose molecule is broken down in the presence of oxygen to form carbon dioxide and water. The equation for the reaction is C6H12O6 + 6O2 --> 6CO2 + 6H2O + Energy
In cellular respiration carbon dioxide and water are the byproducts, but in photosynthesis, glucose and oxygen are produced.
Which manufactures ribosomes?
Question 5 options:
nucleolus
nucleus
endoplasmic reticulum
Golgi apparatus
Answer: nucleolus
Explanation: Ribosomes are manufactured in the nucleolus. Ribosomes are the sites where protein synthesis takes place. Ribosomes are usually made up of two subunits: one large subunit and one small subunit. Ribosomes are manufactured and assembled in the nucleolus. Ribosomal proteins combines with four ribosomal RNA strands in the nucleolus to form two ribosomal subunits: one small subunit and one large subunit that make up the complete ribosome
How does esrth’s rotation affects ocean currents
Answer:
Because the Earth is spinning faster at the equator than at the poles, wind currents are created. The winds pull surface water, creating ocean currents.
Explanation:
Which is a role of helpful bacteria?
removing nutrients from soil
producing oxygen
healing sick animals
preventing tooth decay
Answer:
Producing oxygen
Explanation:
Bacteria actually add to nutrients in soil because they decompose the organic matter such as dead bodies and such. I do not know if bacteria heal sick animals or if they prevent tooth decay rather I am sure they cause both of those.
Therefore, most plausible answer is producing oxygen because there are bacterias like cyanobacteria, or blue-green algae who go through photosynthesis and produce oxygen which is beneficial for all living beings.
Helpful bacteria helps in producing oxygen for carbon di oxide in th environment. Therefore, option (B) is correct.
What are helpful bacteria?Probiotics are live bacteria that are beneficial to our health, that help maintain a healthy balance of good and bad bacteria in our intestinal tract, that contribute to the digestion of food and that alleviate digestive issues such as bloating and diarrhea. Lactobacilli and Bifidobacterium are two types of bacteria that are considered to be examples of probiotics.
Through the process of photosynthesis, extremely minute bacteria known as prochlorococcus are busily converting carbon dioxide into the oxygen that we breathe.
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Are Pleurococcus and Chlorella
Unicellular or Colonial? Explain pls....
Answer:
Both Pleurococcus and Chlorella are Unicellular algae i. e. made of one cell. Chlorella is a type of green algae which grows in colonial form. There are thousands of cells present in colonial form, each cell perform a particular function. For example, some cells are responsible for movement, some for reproduction etc. The jobs are distributed between these cells. But in Unicellular, one cell perform all functions of life.
A Ff ee mouse is bred to a ff Ee mouse. What is the probability that an offspring mouse will have black fur and red eyes?
Question 3 options:
1/2
1/4
3/16
1/16
Answer:
1/4
Explanation:
A Ff ee mouse is bred to a ff Ee mouse. 1/4 is the probability that an offspring mouse will have black fur and red eyes.
What do you mean by offsprings?Offspring are the young creation of living organisms, produced either by a single organism or, in the case of sexual reproduction, two organisms. Collective offspring may be known as a brood or progeny in a more general way.
You're the offspring of your biological parents. This is basically another word for children. Baby horses, gorillas, lizards, and humans are all offspring. A woman who gives birth to quadruplets suddenly has a lot of offspring.
Reproduction is the production of offspring. There are two main forms: sexual and asexual reproduction. In sexual reproduction, an organism combines the genetic information from each of its parents and is genetically unique. In asexual reproduction.
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Item 4
Which age of river is usually slow and meandering?
mature
youth
middle age
new
PLZZZZ I NEED HELPPPP
Answer:
i think its the second one
Explanation:
What are important facts about the digestive system
Answer: The average person produces 2 pints of saliva every day. ...
The muscles in your esophagus act like a giant wave. ...
The second part of your small intestine is called the jejunum. ...
Enzymes in your digestive system are what separate food into the different nutrients that your body needs.
Explanation:
Your welcome!
what is another name for inherited advantageous characteristics
Inherited advantageous characteristics, also known as heritable traits or genetic variance, are those beneficial traits passed from parents to offspring, providing survival or reproductive advantages. These traits must be part of the organism's genetic makeup to be inheritable, aligning with the principle of natural selection in evolutionary biology.
Explanation:The question 'what is another name for inherited advantageous characteristics' refers to those traits or behaviors that are passed from parents to offspring, which provide some sort of benefit to the offspring in their environment. These characteristics are also known as heritable traits or genetic variance in the context of evolutionary biology. They include any aspect of an organism's design, such as speed, intelligence, or strength, that improves its survival and reproductive success, making it more likely that these traits will be passed on to the next generation.
In the realm of evolutionary biology, the inheritance of acquired characteristics was an early theory proposed by Lamarck, which suggested that traits developed during an organism's life as a response to its environment could be passed on to its offspring. However, contemporary understanding emphasizes that only those traits which are part of an organism's genetic code can be inherited. This positions characteristics like muscle strength gained from exercise outside of those that can be directly transmitted to the next generation, while traits such as eye color or the potential for strong muscle development due to genetic predisposition are indeed passed down.
Among these inheritable traits, some are particularly advantageous, increasing the likelihood that the organism will survive long enough to reproduce and pass these beneficial alleles on to their offspring. This selective process is a key mechanism of natural selection, where individuals with traits better suited to their environment are more likely to survive and reproduce, gradually shaping the evolution of populations over time.
Natural selection suggests that creatures with mutations disadvantageous to survival will not live to reproduce, yet there are examples, such as albino animals, found occasionally. Do these exceptions discredit natural selection? Explain your answer.
Answer:
yes the above statement is true.natural selection is not dis credit.
Explanation:
In order to support my answer we just take an example of mutation in an organism as the mutation in organism occur and is useful for the survival of the organism we called the mutation as the good mutation. Thus it is true that some mutation that cause disease and is disadvantageous for the survival of organism. Albino is a case studied here which is abnormal skin color and the skin color as the advantage to camouflage in the surrounding and the organism which can not camouflage will not survive properly because the can not protect them from the predator.
How can fossils Best help paleontologist sand biologists classify organisms?
answer: C) fossils allow scientists to have an idea of the time scale that traits evolved.
Full question:
How can fossils BEST help paleontologists and biologists classify organisms?
Fossils allow scientists to predict what species will become extinct.
Fossils are useful for reconstructing pedigrees and showing family traits.
Fossils allow scientists to have an idea of the time scale that traits evolved.
Fossils allow scientists to always determine the closest living relative to the fossil.
Option C
Fossils allow scientists to have an idea of the time scale that traits evolved BEST help paleontologists and biologists classify organisms
Explanation:
Paleontology is the subject of the records of life on Earth based on fossils. Paleontologists practice fossil remains to experience various features of extinct and living organisms. Modern paleontologists have a category of tools that assist them to create, review and explain fossils.
Fossils can also present proof of the evolutionary story of organisms. Darwin recommended that new species emerge. Paleontologists and other scientists found a series, or ordering, of when one species evolved relevant to another.
Answer:
Common lit answer is C
Explanation:
When did faulting along line XY occur
Without details pertaining to 'line XY', it is difficult to give an accurate date of when faulting occurred. Dating in geology often involves analysis of rock layers and contained fossils or minerals, such as the iridium spike discovered in 1980 that led researchers to deduce an asteroid impact causing the K-Pg mass extinction.
Explanation:The question asks when faulting along a specific line, referred to as XY, occurred. Unfortunately, without additional details about the 'line XY', it's difficult to give a precise date. Information like this is typically deduced in the context of geology and earth sciences through various methods such as dating of rock layers and analysis of fossils and minerals present. An example of such practice can be seen with the 1980 discovery by Luis and Walter Alvarez, Frank Asaro, and Helen Michels, when they found a spike in the concentration of iridium within the sedimentary layer at the K-Pg boundary. This discovery led them to hypothesize an asteroid impact which caused the K-Pg mass extinction. To determine the date of faulting along line XY, similar geological detective work would need to be performed.
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Why did Mendel use pea plants in his experiments?
O
A. They are haploid organisms.
O
B. They have no dominant traits.
O
C. They produce many offspring.
O
D. They are all male.
Answer:
C
Explanation:
Mendel used pea plants in his experiments because they produce many offsprings along with many other reasons like contrasting traits, self pollinating abbility etc.
Mendel used pea plants in his experiments because they are easy to grow and maintain, have easily observable traits, and have both male and female reproductive organs for breeding manipulation.
Explanation:Mendel used pea plants in his experiments for several reasons. Firstly, pea plants are easy to grow and maintain, making them ideal for conducting experiments. Secondly, pea plants have easily observable traits, such as flower color and seed shape, which allowed Mendel to study inheritance patterns.
Lastly, pea plants have both male and female reproductive organs, making it possible for Mendel to manipulate their breeding and study the transmission of traits.
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a group of organisms that are genetically similar and can produce fertile offspring
Answer:
Yes
Explanation:
Yes
Discuss how biodiversity affect the increase and decline of the elephant population
Biodiversity supports elephant populations by ensuring ecosystem health, but overpopulation of elephants can harm biodiversity. Ivory poaching is a major threat to elephants, causing declines despite an international trade ban. Stable political systems and managed property rights for hunting licenses have been associated with increased elephant populations in some African countries.
Biodiversity's Impact on Elephant Populations
The relationship between biodiversity and elephant populations is complex. High levels of biodiversity can support robust elephant populations, as diverse ecosystems tend to be healthier and more resilient. However, the impact of elephants on biodiversity can be dual-faceted; they can enhance biodiversity through their role as ecosystem engineers or cause its decline by overgrazing, particularly when their numbers exceed the carrying capacity of their habitat. Poaching, primarily for ivory, remains the most significant threat to elephants, leading to dramatic population declines. Despite an international ban on the ivory trade, forest elephants continue to suffer serious losses in range and numbers.
Analysis by Professors McPherson and Nieswiadomy has shown that elephant populations have rebounded in African nations with stable political systems and proper management strategies, such as establishing property rights in licenses to hunt elephants. These nations, including Botswana and Zimbabwe, have seen elephant numbers increase significantly. Conversely, elephant populations have declined in countries with unstable political systems and inadequate property rights. As human population growth in Sub-Saharan Africa continues, the pressure on elephant habitats and the region's biodiversity is likely to intensify, potentially leading to increased human-wildlife conflicts and further declines in elephant populations.
What are scientist doing to Pork to make it a GMO?
Answer:
They use a gene modification technique called CRIPSR-CAS9. The pigs have been given a gene that allows them to better regulate their own body temperature, whereby they burn fat, or at which animals consume their own fat.
Explanation:
British and Chinese scientists explained that they conducted the study by adding a mouse version of the UCP1 gene used for porcine embryos, which is used to regulate body temperature characteristic of most mammals, but not ordinary pigs.
It is problematic for pigs to maintain a stable body temperature, and this is especially complicated in pigs that are cold in the winter months because they have not been able to "store" fat.
Inserting the UCP2 gene could solve this problem.
Which cell organelle contains coded directions for production of proteins? Question 3 options: endoplasmic reticulum lysosome Golgi apparatus nucleus
Answer: nucleus
Explanation: The nucleus contains the DNA which is a genetic material that contains all the instructions for protein synthesis. Before proteins are produced, the DNA is first of all copied into an single stranded RNA in a process known as transcription. This process takes place in the nucleus. The single stranded RNA then leaves the nucleus to the ribosome where protein synthesis takes place, there the RNA is translated into a polypeptide chain.
A cell uses which of the following to accelerate chemical reactions enabling its metabolic machinery to operate?
a
the reactants and products of photosynthesis has no relationship with the reactants and products of cellular respiration.
b
the products of cellular respiration are the reactants of photosynthesis.
c
the reactants of photosynthesis are the reactants of cellular respiration.
d
the products of cellular respiration are the products of photosynthesis.
Final answer:
The statement 'the products of cellular respiration are the reactants of photosynthesis' explains the reciprocal relationship between these two processes, highlighting the cycle of matter and energy in biological systems. So the correct option is b.
Explanation:
The correct statement about the relationship between the reactants and products of photosynthesis and cellular respiration is that the products of cellular respiration are the reactants of photosynthesis. Photosynthesis uses carbon dioxide and water to produce glucose and oxygen. Conversely, cellular respiration uses glucose and oxygen to produce carbon dioxide, water, and energy in the form of ATP (adenosine triphosphate).
Statement b of the question, 'the products of cellular respiration are the reactants of photosynthesis,' highlights this reciprocal relationship. By examining the equations for both processes, we can see they are the reverse of each other, signifying their direct connection to the carbon cycle.
Preliminary treatment includes wastewater screening and blank
Preliminary treatment in wastewater treatment entails methods like wastewater screening and sedimentation. Screening catches large solids that could potentially damage the machinery. Meanwhile, sedimentation or grit removal takes away heavy particles that add undue wear and tear on the plant's machinery.
Explanation:Preliminary treatment in wastewater handling comprises of procedures such as wastewater screening and sedimentation. Wastewater screening is deployed as a first step, which is vital in blocking large objects that could possibly damage the wastewater treatment facilities or intervene with following processes. Objects such as rags, wood fragments, plastic, and other solids are intercepted at this stage.
Following screening, sedimentation or grit removal occurs. This process helps in the removal of sand, small stones, broken glass, and other heavy particles that could cause undue wear and tear on the facility's machinery. An example of how these processes aid in maintaining the natural environment can be noticed in the selective precipitation method used in treating water from manufacturing facilities. This specific process eliminates detrimental ions such as phosphate (PO4³-) which results in minimizing algae growth, thereby protecting marine life and human health.
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Final answer:
Preliminary treatment of wastewater includes the removal of large solids through screening and grit removal before moving on to primary treatment where organic solids, fat, and grease are settled or floated out. Secondary and tertiary treatments follow, further breaking down organic matter and filtering the water, respectively, with disinfection being the final step.
Explanation:
Preliminary treatment of wastewater includes wastewater screening and grit removal (the removal of sand and gravel) to protect the subsequent processes from being damaged by large and abrasive objects.After these larger solids are removed, the water then goes through primary treatment, which involves the settling or floatation to remove organic solids, fat, and grease. At this stage, a significant amount of sludge is produced, which may go through further treatment to be used safely as a fertilizer, although the presence of contaminants can be a challenge.The subsequent steps in the wastewater treatment process, beyond preliminary and primary treatments, include secondary treatment which harnesses aerobic bacterial decomposition to break down organic solids. This step is critical because it significantly reduces the biological oxygen demand (BOD) of the wastewater.Finally, tertiary treatment further refines the water by decomposing remaining nutrients and through additional filtration, followed by disinfection to eliminate bacteria, making the water safe for discharge or reuse.Which of the following is NOT important to packaging and transporting substances inside a cell?
Select one:
O a. Golgi bodies
O b. Endoplasmic reticulum
O c. Cytoplasm
O d. Mitochondria
Answer:
Mitochondria
Explanation: This is the powerhouse of the cell. It is important in making ATP not the transportation of materials inside a cell.
Multicellular plants have levels of organization. What characteristics of cells makes this possible?
Answer:
The characteristics of cells to divide and convert into specialized cells makes it possible for the different levels of organizations to occur. Specialized cells perform specialized functions which are necessary for the body of each organism. The working of these specialized cells allows the formation of the specialized tissues and the levels of organizations continue. Hence, we can consider the ability of the cells to multiply and divide into specialized cells as the basic characteristic due to which levels of organization occur.
Explanation:
A cell is the basic unit of life. Therefore it can exist on its own in the lowest form of organization. Nonetheless, cells can also communicate with other cells using signaling molecules and can also respond to stimuli. This means cells can communicate and organize themselves into higher orders of organization such as tissues and organs. This also the cell to perform coordinated functions.
what is biome, explain easy please.
Answer: a large naturally occurring community of plants and animal s occupying a major habitat.
Explanation:
Examples would be the tundra and temperate forest and salt/fresh water biomes.
Final answer:
A biome is a large area on Earth characterized by specific climate conditions that support distinct communities of plants and animals. Climate significantly influences the distribution and characteristics of biomes, affecting the types of species found in each.
Explanation:
A biome is fundamentally a large region on the Earth characterized by a specific type of climate and, consequentially, certain types of plant and animal communities. For example, the tropical rainforest biome is known for its high rainfall, high temperatures throughout the year, and diverse species of both plants and animals. Similarly, the desert biome has adaptations for low rainfall, showcasing sparse vegetation and animals specialized for dry conditions. The climate, which includes factors like temperature and rainfall, plays a crucial role in determining the type of plants and animals that can thrive in each biome. This connection underlines the importance of climate as the most significant abiotic factor affecting the distribution of terrestrial biomes.
3) Which of the following words best describe
the climate of tropical rainforests biomes?
a. Wet
b. Mild
c. Hot
d. Dry
By the help of which factor do RBC absorb oxygen?
Answer:
Hemaglobin
Explanation:
Answer:
By the help of haemoglobin, RBC absorbs oxygen.
Explanation: