Answer:
DNA is wrapped around proteins known as histones to form chromatin. Packing the DNA into nucleosomes condenses the DNA approximately sevenfold. It can be further organized by winding the chromatin into more compact structures. Coiling the chromatin around itself decreases the space it occupies by another sixfold or so. Through a series of similar compacting strategies, the entire genome can fit inside the nucleus of a single cell.
Explanation:
Explain the flow of blood from a leg muscle to the heart and lungs and back to the muscle again listing each organ the blood travels through and what happens at eavh place
Deoxygenated blood from the leg muscle returns to the heart, moves to the lungs to be oxygenated, goes back to the heart, and flows through the body again.
The circulatory system is a complex system in the body whose function is to keep the flow of oxygenated blood throughout the body.
This system is composed of multiple steps that create a cycle and usually involve the following organs:
The heart.The lungs.Blood vessels.VeinsArteriesHere are the steps if we start with deoxygenated blood in the muscles.
The deoxygenated blood returns to the heart through the veins. This blood has no oxygen because this has been used.An important vein known as the vena cava pumps the blood into the right atrium of the heart.The blood then floods into the right ventricle.Later, as the heart beats the blood moves from the heart to the pulmonary artery.In the lungs, the blood is oxygenated and then it returns to the heart.The blood goes to the left atrium and moves to the left ventricle.The blood is pumped from the heart to the rest of the body including muscles.Learn more about blood in: https://brainly.com/question/11568067
An mRNA that is being produced comes off of the ________.
A. template strand in bacteria and the coding strand in eukaryotes
B. coding or template strand in both bacteria and eukaryotes depending upon the species
C. coding strand in bacteria and the template strand in eukaryotes
D. coding strand in both bacteria and eukaryotes
E. template strand in both bacteria and eukaryotes
Answer:
template strand in both bacteria and eukaryotes
Explanation:
drug-resistance gene
Answer:
Antibiotics save lives but any time antibiotics are used, they can cause side effects and lead to antibiotic resistance.
Since the 1940s, antibiotics have greatly reduced illness and death from infectious diseases. However, as we use the drugs, germs develop defense strategies against them. This makes the drugs less effective.
Antibiotics fight germs (bacteria and fungi). But germs fight back and find new ways to survive. Their defense strategies are called resistance mechanisms. Bacteria develop resistance mechanisms by using instructions provided by their DNA. Often, resistance genes are found within plasmids, small pieces of DNA that carry genetic instructions from one germ to another. This means that some bacteria can share their DNA and make other germs become resistant.
- 1. what inputs do plants need to carry out photosynthesis, and how might you provide these on another planet?
(20pts)2. What outputs do plants produce from photosynthesis and how do these benefit humans?(20 points) 3. How
do plants transfer energy from light to sugar molecules?(10points) 4. What questions would you ask about the planet
to refine your list of necessary materials?(30points) Include pics of plants or pics of planet(30point)
Answer:
1) carbon dioxide, water, and sunlight.
2) glucose and Oxygen, and humans got benefited by consuming (breathing oxygen) that are produced by plants while photosynthesis.
3)During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.
Which of the following can be used for relative dating?
a. strontium-rubidium dating
b. inclusions
c. radioactive decay
d. potassium-argon dating
Answer:
im pretty sure it's A correct me tho if I'm wrong
Radioisotopes and ionizing radiation I. allow us to develop high resolution images of some tissues. II. were hypothesized for medical use over a century ago. III. can induce apoptosis in cancerous tissues. IV. are always selective for cancerous tissues.
Given our understanding of Radioisotopes and ionizing radiation, we can confirm that they allow us to develop high-resolution images of some tissues, as well as induce apoptosis in cancerous tissues.
As we know, Ionizing radiation can be dangerous to humans and when used, must be used will all the proper safety procedures in place. This kind of radiation has enough power to cause mutations on a genetic level. However, this radiation also allows us to use X-ray imaging to obtain high-resolution images of bone tissue.
As stated before, ionizing radiation and radioisotopes are powerful enough to cause mutations on a genetic level. At times, these mutations can be so severe that they trigger apoptosis in cells. Scientists have been using this technology in order to induce apoptosis in cancer cells on command, with mixed results.
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What is the main function of the cell membrane in a plant cell?
Answer:
Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in.
Answer:
The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.Explanation:
because it is
Use the drop-down menus to complete the statements.
____occurs when an entire species cannot adapt to a long-term environmental change.
A population that cannot find food after a flood may
____to survive.
Over many generations, the buildup of favorable adaptations in a population may lead to___
Answer:
Extinction occurs when an entire species cannot adapt to a long-term environmental change.
A population that cannot find food after a flood may migrate to survive.
Over many generations, the buildup of favorable adaptations in a population may lead to speciation
Explanation:
I did this assignment on edge!! 100% correct :)
Extinction occurs when an entire species cannot adapt to a long-term environmental change. A population that cannot find food after a flood may migrate to survive.
What is extinction ?Extinction is the eventual devastation of a certain class of organism when they become unable to adapt to the environmental changes. Extinction can occurs through natural calamities such as flood, earthquake etc. or by human activities which destroys the habitats of the organisms.
A population that cannot find food after a flood may migrate to survive. They may travel over distances to gather food or water or to shelter somewhere.
Over many generations, the buildup of favorable adaptations in a population may lead to speciation. It is the process by which a new species is originated. They find better adaptation to reproduce and make their population common.
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The process that replicates the DNA, and then divides a Prokaryotic cell into two Daughter cells is called _______.
Answer:
Binary fission
Explanation:
The cell division process of prokaryotes, called binary fission, is a less complicated and much quicker process than cell division in eukaryotes. Because of the speed of bacterial cell division, populations of bacteria can grow very rapidly.
A human skin cell contains 46 chromosomes (23 paternally inherited and 23 maternally inherited). Before mitosis begins, this cell must replicate its genetic material. What are the products of this replication
Answer:
92 sister chromatids, in 46 pairs that are connected by a centromere
Explanation:
A human skin cell contains 46 chromosomes (23 paternally inherited and 23 maternally inherited). Before mitosis, the product of the replication is 92.
What is mitosis?Cell division occurs during mitosis. All eukaryotic cells go through the process. There are four stages to the process. The cell divides during the procedure. A daughter cell that is identical to the parent cell is created.
A total of 46 chromosomes make up the 23 pairs of homologous chromosomes that make up human somatic cells. Since there is no genetic recombination during mitosis, unlike the meiotic cell division, which results in the production of haploid gametes, the daughter cells formed during mitosis are identical.
So, before mitosis, 46 + 46 = 92 chromosomes.
Therefore, the product of the replication is 92.
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I need help pls giving brainliest if correct
If a postsynaptic neuron is stimulated to threshold by spatial summation this implies that ________.
Answer:
Efectivamente, una neurona puede ser a la vez presináptica y postsináptica y de hecho, esto es lo que sucede habitualmente en el Sistema Nervioso, formado por una intrincada red de neuronas que establecen multitud de contactos sinápticos entre sí y que a veces se consideran presinápticas, y otras, postsinápticas. Estos términos hacen referencia a la neurona que en un determinado momento envía la información (presináptica) y a la neuronas que la recibe o receptora (postsináptica). Si en una sinapsis química la neurona presináptica libera un neurotransmisor que se une a los receptores de la membrana postsináptica, se producirán cambios eléctricos en el potencial de membrana de la neurona receptora. Si la suma de todos estos cambios eléctricos (sumación espacial y temporal) supera el umbral de excitación de esa neurona postsináptica, se desencadenará un potencial de acción en su axón que se propagará a lo largo de él hasta llegar a los botones terminales, donde provocará de nuevo la liberación de un neurotransmisor. Así, la neurona postsináptica se convierte en presináptica enviando información a otras neuronas, que serán en este caso, neuronas postsinápticas.
Explanation:
The postsynaptic membrane depolarizes when Na+ reaches the postsynaptic cell. This depolarization induces an excitatory postsynaptic potential, which increases the likelihood of an action potential being triggered by the postsynaptic neuron (EPSP).The membrane potential can so surpass the barrier required to generate an action potential.
What postsynaptic neuron is stimulated to threshold?One postsynaptic potential's amplitude at the instant the next one starts will algebraically sum with it to create a bigger potential than the sum of the individual potentials. As a result, the membrane potential can cross the threshold necessary to produce an action potential.
Therefore, If a postsynaptic neuron is stimulated to threshold by spatial summation, this implies that (the postsynaptic cell has many synapses with many presynaptic neurons).
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Which is a biological stressor, impacting some coral reefs?
Sedimentation has been identified as a primary stressor for the existence and recovery of coral species and their habitats. Sediment deposited onto reefs can smother corals and interfere with their ability to feed, grow, and reproduce.
Use this diagram to answer the following
questions. The frequency of the wave is 0.5 Hz.
6 meters
10 Analyze What is the wavelength of these
waves?
11 Calculate What is the speed of these waves?
a
12 Solve If you were sitting in a boat as these
waves passed by, how many seconds would
pass between wave crests?
The frequency of a wave is the number of waves that pass a point in a given amount of time. It is measured in hertz (Hz), which is equal to one wave per second. The wavelength of the waves is 12 meters, the speed of the waves is 6 meters per second, and the time between wave crests is 2 seconds.
The wavelength of a wave is the distance between two consecutive wave crests or troughs. It is measured in meters. The speed of a wave is the distance that it travels in a given amount of time. It is measured in meters per second.
Frequency = 0.5 Hz
Wavelength = 6 meters
Wavelength = Speed / Frequency
Wavelength = 6 meters / 0.5 Hz
Wavelength = 12 meters
Speed:
Speed = Wavelength × Frequency
Speed = 12 meters * 0.5 Hz
Speed = 6 meters per second
The time between wave crests:
Time between wave crests = 1 / Frequency
Time between wave crests = 1 / 0.5 Hz
The time between wave crests = 2 seconds
Therefore, the wavelength of the waves is 12 meters, the speed of the waves is 6 meters per second, and the time between wave crests is 2 seconds.
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Select the correct answer from each drop-down menu.
The government of the United Kingdom is a
Wales, and
The United Kingdom consists of four countries: England, Scotland,
Reset
Next
Which type of infection is caused by the entry of infectious microorganisms into the bloodstream by way of a central line
Answer:
A central line-associated bloodstream infection (CLABSI) is a serious infection that occurs when germs (usually bacteria or viruses) enter the bloodstream through the central line.
Explanation:
in dna replication, the new strand of dna that is synthesized discontinuously.
Answer:
Okazaki fragments
Explanation:
If a daughter has X chromosomes from both parents, what’s her genotype? Phenotype?
Answer:If she get x chromosomes from both parents, then shes XX
Explanation:
Typically, females have two X chromosomes (XX) and males have one X chromosome and one Y chromosome (XY).
Which of the following is TRUE of the sliding filament theory?
Answer:
a. The thin filaments slide past the thick filaments.
Explanation: is correct/post protected
Muscle fibers contain which of the following?
Sarcolemma
Sarcoplasm
Multi-nuclei
*All of the above (correct)
Answer:
d. All of the above
Explanation: is correct. post protected
Prior to the formation of a land bridge about 3 MYA that allowed placental mammals to invade, marsupials were diverse and abundant on what other continent besides Australia
Prior to the formation of a land bridge about 3 MYA, marsupials were diverse and abundant in SOUTH AMERICA. The western half of Gondwana separated from the eastern half million years ago.
Gondwana was a super landmass containing all continents that began to break up during the Jurassic.
The western half of Gondwana (i.e., Africa and South America) separated from the eastern half (i.e., India, Australia, and Antarctica) million years ago.
This separation led to the divergence of many taxonomic groups, including Australian marsupials and South American marsupials.
Some South American marsupials include, among others, Andean caenolestid, Chacoan gracile opossum, long-nosed caenolestid etc.
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explain how oil is formed
Answer:
The formation of oil begins in warm, shallow oceans that were present on the Earth millions of years ago. ... It is this sediment on the ocean floor that then forms oil over many years. The energy in oil initially comes from the Sun, and is energy from sunlight that is trapped in chemical form by dead plankton.
Explanation:
If you like my answer than please mark me brainliest thanks
Answer: oil is formed by bones they decompose after hundreds of years of time
Explanation: btw it’s Alex
True or false The center of gravity and the center of mass Rae always the same in an object
the ________ is vital to sleep because it secretes growth hormones.
Answer:
The pituitary gland
The pituitary gland is vital to sleep because it secretes growth hormones. Sleep is essential for growth because it triggers the release of several hormones.
How pituitary gland secrets the growth hormones?Our brain's pituitary gland is a structure that creates specialized hormones, including growth hormone (also referred to as human growth hormone or HGH). Growth hormone (GH) is released in pulses during the course of a 24-hour cycle.
Early sleep, in temporal conjunction with the beginning of the first period of deep slow-wave sleep, is when normal adult participants have the most consistent and frequently largest GH pulse (SWS).
Therefore, sleep, stress, exercise, and low blood glucose levels all raise growth hormone levels, released by the pituitary gland.
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Many people have strong feelings about genetically modified foods. There are benefits and concerns. What do you think? Do the benefits outweigh the concerns, and genetically modified foods should be available? Or, the concerns outweigh the benefits and genetically modified foods should not be used?
Answer:
Genetically modified (GM) foods contain at least one ingredient coming from a plant with an altered genetic composition.16 Genetic modification, also known as genetic engineering, often introduces new, desirable characteristics to plants, such as greater resistance to pests. Many U.S. crops are grown using genetically engineered seeds, including a large share of the soybean, corn, cotton and canola crop. As a result, the majority of processed foods in the U.S. contain at least one genetically modified ingredient.About one-in-six (16%) Americans care a great deal about the issue of GM foods. These more deeply concerned Americans predominantly believe GM foods pose health risks. A majority of this group also believe GM foods are very likely to bring problems for the environment along with health problems for the population as a whole.A number of observers have suggested that Americans’ limited familiarity with genetically modified foods suggests that people’s opinions about GM are “soft” and, therefore, more likely to change over time and, potentially, to be sensitive to differences in survey question wording.
Explanation:
Genetically modified foods are made in such a way that their less effective or diseased genes are eliminated and beneficial genes are overproduced.
What do you mean by GM crops?Genetically modified crops may be defined as those crops or foods which are derived in such a way that their genetic material does not occur naturally.
The concerns of GM foods outweigh the benefits and genetically modified foods should not be used. Some of the reasons are given below:
GM foods promote allergic reactions which affect the health of the individual.It may also contribute to antibiotic resistance. They are dangerous to insects as they have insect-resistant genes. GM technique lowers the diversity among crops. It may harm the environment to a larger extent.Therefore, the concerns of GM foods outweigh the benefits and genetically modified foods should not be used.
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When is energy released from ATP? What types of cells make/need ATP? What is ATP used for?
Answer/Explanation:
ATP is consumed for energy in processes including ion transport, muscle contraction, nerve impulse propagation, substrate phosphorylation, and chemical synthesis. These processes, as well as others, create a high demand for ATP.
10.
Which statement correctly describes carbon fixation?
a. the conversion of CO2 to an organic compound
b. the use of RuBisCO to form 3-PGA
c. the production of carbohydrate molecules from G3P
d. the formation of RuBP from G3P molecules
e. the use of ATP and NADPH to reduce CO2
Answer:
answer A the conversion of CO2 to an organic compound.
Explanation:
Carbon fixation is first step of Calvin cycle. The carbon fixation is process during which inorganic CO2 gas into organic compounds.
The carbon fixation does not involve usage of RuBisCO to form 3-PGA. This step will take place during regeneration process of Calvin cycle.
Carbon fixation refers to the conversion of carbon dioxide to an organic compound.
What is carbon fixation?It is the process by which autotrophs fix atmospheric carbon to produce organic compounds. It is the assimilation of inorganic carbon and its transformation to organic compounds. This can be used as the storage of energy and for the production of biomolecules.
All the autotrophs fix atmospheric carbon dioxide by the phenomenon of chemosynthesis or photosynthesis. The main process of carbon fixation is the photosynthesis. The process of carbon fixation takes place in the light-independent reaction or dark reaction of the process of photosynthesis.
Thus, the correct statement is option a.
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______________ are two factors that can influence enzyme activity
A. protein and carbohydrate
B. atoms and molecules
C. Temperature and pH
D. polar and non-polar substances
how many times must the calvin cycle turn to produce 10 glucose molecules?
14. The device below is used for what purpose?
