Answer: DNA replication is important because it creates a second copy of DNA that must go into one of the two daughter cells when a cell divides. Without replication, each cell lacks enough genetic material to provide instructions for creating proteins essential for bodily function. DNA is generally tightly packed into a structure called chromatin.
Explanation:
It is important for DNA to be duplicated exactly before a cell divides because one copy of DNA transfers into the nucleus of the daughter cell.
What is DNA duplication or replication?DNA duplication is also known as DNA replication. A double-stranded DNA molecule is copied to create two identical DNA molecules through the process of DNA replication.
Because every time a cell splits, the two new daughter cells must have the same genetic material, or DNA, as the parent cell, replication is a crucial process. All living things replicate their DNA, which is the primary mechanism for biological heredity.
Thus, it is important for DNA to be duplicated exactly before a cell divides because one copy of DNA transfers into the nucleus of the daughter cell.
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How a person fits into a food web?
Answer:
im guessing we eat everything but don't get eaten
Explanation:
Answer:
I guess we eat everything on the food web
Explanation:
Because there are many things one the food web that might eat humans but all things on the food web is food to us.
14)
What are the products of photosynthesis?
glucose and oxygen
carbon dioxide and water
carbon dioxide and oxygen
glucose and carbon dioxide
Answer:
A. Glucose and oxygen
Explanation:
Trust me
Ecologists use survivorship curves to visualize how the number of individuals in a population drops off with time. By plotting the
number of survivors per 1,000 individuals on a log scale versus time, three basic patterns emerge, seen here in the graph. Most
individuals in this population produce many thousands of offspring, most of whom die right away. Relatively little effort or
parental care is invested in each individual. Once this initial period is over, survivorship is relatively constant.
Predict which type of organism could be represented by survivorship curve type III.
Answer:
it's a
Explanation:
The survivorship curve that represents organisms with high initial mortality and constant survivorship is characteristic of r-selected species, such as insects or small rodents.
The survivorship curve you're describing, characterized by high initial mortality followed by relatively constant survivorship, is typical of r-selected species.
These are organisms that exhibit a reproductive strategy emphasizing quantity over quality.
They invest minimal effort in parental care and produce a large number of offspring, many of which do not survive to reproductive age.
R-selected species are often found in unstable or unpredictable environments, where the ability to reproduce quickly and produce a large number of offspring can be advantageous.
These species typically have a shorter lifespan, mature quickly, and have high reproductive rates.
Examples of organisms represented by this survivorship curve include insects, small rodents, and some species of fish.
Insects, for instance, often lay numerous eggs or give birth to many offspring, but only a small fraction of them survive to adulthood.
This strategy allows them to adapt to changing environmental conditions and maintain their population.
The curve's initial steep decline is due to the high mortality during early life stages, which is characteristic of many r-selected species.
The subsequent plateau indicates that the survivorship rate remains relatively stable over time, as the surviving individuals reach maturity and their mortality rate becomes more constant.
In contrast, K-selected species, characterized by low reproductive rates and significant parental care, often display a different survivorship curve.
The high survivorship at the beginning of life and a gradual decline as individuals age.
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Task:2 Directions: Use the word bank below to complete the following sentences.
Antigens
Illness/Death
Immune
Pathogen
Antibody
Cells
White Blood
1. The____________
system identifies and defends the body against pathogens.
2. If an organism fails to maintain homeostasis, it will most likely cause__________
3. Microbes that enter the body, causing disease, are known as___________
4. Certain microbes can cause immune responses in the human body because their cell
membranes contain___________
, which serve as identification tags.
5.______________
are responsible for attacking microbes that enter the body.
6.______________
are specifically shaped proteins made by white blood cells.
describe the role of each key terms
a.white bloodcells:
b.antigen:
c.antibodies:
d.pathogens or microbes
Answer:
1.immune
2.illness or death
3.pathogen
4.white blood cells
5.antibody
6.antigen
explanation:B.foreign particles
C.produced by our body to defeat antigens
D.organisms which tries to invade our body
How does sexual reproduction increases variation within species ?
A) by increasing the rate at which parents can produce offspring
B) by reducing the amount of time it takes parents to produce offspring
C) by causing offspring to have the same exact DNA as their parents
D) by producing offspring that are genetically different from their parents
Answer:
by producing offspring that genetically different from their parents.
Explanation:
Answer:
by reducing the amount of time it takes parents to produce offspring
Explanation:
Which of the following happens during the second trimester of fetal
development?
A. Fetal breathing becomes rhythmic.
B. The placenta develops.
C. The weight of the fetus becomes half of what it will be at birth.
D. The fetal reproductive system matures.
Someone help me please
During the second trimester, the fetal reproductive system matures, the fetus becomes more active, and the placenta fully supports nutrition and waste elimination.
Explanation:During the second trimester of fetal development, several significant changes occur. The fetus grows to about 30 cm, becomes active, and the mother usually feels the first movements. All organs and structures continue to develop.
Importantly, the placenta has fully taken over the functions of nutrition and waste elimination and has begun the production of estrogen and progesterone, as the corpus luteum has degenerated by this stage. The placenta's importance is heightened during the second trimester, as it will continue to function up through the delivery of the baby. Therefore, the correct answer to the question is D. The fetal reproductive system matures.
Final answer:
During the second trimester, the fetus continues to grow, reaching about 30 cm, and becomes more active. The placenta, already developed, handles nutrition, waste elimination, and hormone production. Organ and structural development is ongoing, including that of the reproductive system. Option A,B, D.
Explanation:
During the second trimester of fetal development, the fetus experiences significant growth and changes. According to provided references, by the end of the second trimester, the fetus has grown to about 30 cm (12 inches) and becomes more active, with movements being felt by the mother. The development of all organs and structures continues, with the placenta already established and taking over various functions such as nutrition, waste elimination, and the production of hormones like estrogen and progesterone from the degenerated corpus luteum. The placenta maintains these functions until the delivery of the baby. Regarding the provided choices, respiratory system changes do occur, and while the fetus makes breathing movements, rhythmic fetal breathing is not established due to dependence on the mother for oxygen. The placenta is fully developed early on and does not just start to develop during the second trimester. Fetal weight shifting to half of what it will be at birth, typically occurs later in pregnancy. The maturation of the fetal reproductive system also continues to develop throughout the second trimester.
what will happen to the population of dolphins if the sharks die out? it will increase, it will decrease, it will stay the same
Answer:
Increase
Explanation:
If sharks die, there will be less populations eating dolphins, this means that less dolphins will be eaten and therefore they will get to reproduce and eat without be disturbed by sharks.
NOTE: IN REAL LIFE SHARKS USALLY DON'T EAT DOLPHINS, I'M DON'T TRUST THIS ANSWER UNLESS YOU AGREE
What are the six steps of the Carbon Cycle?
Answer:
here u go
Explanation:
Photosynthesis. Plants pull in carbon dioxide out of the air through photosynthesis. ...
Decomposition. ...
Respiration. ...
Combustion.
Final answer:
The Carbon Cycle includes six steps: photosynthesis, respiration, decomposition, ocean uptake, interactions with rocks and fossil fuels, and human activities, all of which involve the movement and transformation of carbon through different forms in the Earth's ecosystems.
Explanation:
The Carbon Cycle is a series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels. The six steps of the Carbon Cycle are:
Photosynthesis: Plants draw carbon dioxide out of the atmosphere and convert it into carbohydrates through photosynthesis.Respiration: Animals and plants respire by using oxygen to convert carbohydrates into energy, returning carbon dioxide to the atmosphere.Decomposition: The breakdown of dead organisms and organic waste by soil microorganisms releases carbon dioxide back into the atmosphere through soil respiration.Ocean Uptake: Carbon dioxide is dissolved in ocean water, where it can be used to form carbonates or taken up by marine organisms.Rocks and Fossil Fuels: The formation and weathering of rocks can store carbon for long periods, and burning fossil fuels releases carbon back into the atmosphere.Human Activities: Activities such as burning fossil fuels and deforestation increase the level of carbon dioxide, disrupting the natural carbon cycle.These steps form a complex pathway through which carbon atoms cycle through the Earth's ecosystems, impacting climate and supporting life on Earth.
What are articulations?
1-junctions in the body that connect organ to bone
2-junctions in the body that connect muscle to nervous tissue
3-junctions in the body that connectbone to bone
4-junctions in the body that connect muscle to organ
Answer:
3
Explanation:
Articulations are where bone connects to bone
3-junctions in the body that connect bone to bone
With increased altitude how does the density of the atmosphere change?
increases
remains the same
decreases
fluctuates
Answer:I wanna say increases
Explanation: but I don't know for sure
In what way are nitrogen oxides harmful to the environment
Answer:
Nitrogen dioxide is an irritant gas, which at high concentrations causes inflammation of the airways. ... NOx gases react to form smog and acid rain as well as being central to the formation of fine particles (PM) and ground level ozone, both of which are associated with adverse health effects..
Explanation:
An abandoned field starts out with grass as the only plant species. After a few years, trees start to grow in the field. How will the trees most likely impact the biodiversity of the abandoned field?
A. The number of plant species will decrease, and the number of animal species will increase.
B. The number of plant species and the number of animal species will both increase.
C. The number of plant species and the number of animal species will both decrease.
D. The number of plant species will increase, and the number of animal species will decrease.
Answer:
B
Explanation:
4. How does a lytic virus kill the cells that it infects?
A. It stops energy production by the cells mitochondria.
B. It allows the cell's cytoplasm to enter the nucleus, which destroys the cell's DNA.
C. It causes the cell membrane to rupture.
OD. It destroys chlorophyll molecules so that the cell cannot conduct photosynthesis.
C, It causes the cell membrane to rupture.
what are the difference or similarity in species richness between Sahara desert and SE Asia tropical forest
SE Asia tropical forest region has greatest diversity of living organisms contains 20% of the planet's vertebrate and plant species and the world's third-largest tropical forest. In addition to this existing biodiversity, the region has an extraordinary rate of species discovery, with more than 2,216 new species described between 1997 and 2014 alone.
While Sahara hosts some 70 species of mammals, 90 species of resident birds, 100 species of reptiles, and numerous species of arthropods (invertebrates that have jointed limbs, segmented bodies and external skeletons)
SimilarityAlthough rainforests and deserts are very different, they do have something in common. They both have mountains and steep canyons.
What defines a desert?One thing all deserts have in common is that they are arid or dry. Most experts agree that a desert is an area of land that receives no more than 25 centimeters (10 inches) of precipitation a year. The amount of evaporation in a desert often greatly exceeds the annual rainfall.
What is tropical forest?A tropical forest is a type of forest found in areas with high regular rainfall and no more than two months of low rainfall, and consisting of a completely closed canopy of trees that prevents penetration of sunlight to the ground and discourages ground-cover growth.
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When are lung transplants performed? What are the risks of lung transplants?
In most cases, a lung transplant is done only after all other treatments for lung failure are unsuccessful. Lung transplants may be recommended for people under age 65 who have severe lung diseases. The major risk of a lung transplant is organ rejection. This happens when your immune system attacks your donor lung as if it were a disease. Severe rejection could lead to failure of the donated lung. Other serious complications can arise from the drugs used to prevent rejection.
Answer:
Lung transplants are performed when there are no other medical options; it is a last resort.
The recipient’s body may reject the new lung.
The transplanted lung may also become infected.
Explanation:
on edge
How is matter transformed and conserved in the carbon cycle?
How is energy transformed and conserved in the carbon cycle?
Is there anyone who can answer this or explain it to me?
Answer:carbon can be form naturally or artificially, both give energy by giving heat power.
Explanation:
Which organism is involved in vegetative reproduction?
Describe how C. parvum obtains the glucose it needs for glycolysis after it has infected another cell
Explanation:
Cryptosporidium parvum mainly affects intestine which is the human digestive system.
It is a single cell parasite and depend on the host for its resources.
It uses the glucose already present in the digestive system of hosting. Therefore it obtains this glucose from the host cell to carry out glycolysis
Global warming is closely associated with
identifying Ice Ages
Use the drop-down menus to answer the following questions.
What natural element is one of the best preservers of prehistoric life?
What clues in fossils help scientists identify different ice ages?
ice
plants
rocks
water
Answer:
1. Ice
2. Plant and animal remains
Explanation:
I took the test
Ice is the natural element that is one of the best preservers of prehistoric life.
Plants fossils help scientists to identify different ice ages.
What is Fossil?A fossil may be defined as the dead and organic remains of past organisms that are buried under the earth's surface millions of years ago.
The presence of prehistoric life may be best understood by the natural elements such as ice that has a definite composition with respect to time.
Plants and animal remains illustrate the occurrence of fossils which assist scientists in estimating the different ice ages.
Therefore, it is well described above.
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A student is comparing physical versus chemical changes using sugar cubes. Which part of the student's experiment illustrates a chemical change?
A
Melting a sugar cube using a hotplate
B
Burning a sugar cube in a flame
C
Dissolving a sugar cube in water
D
Crushing a sugar cube with a mortar and pestle
This graph displays Earth's water distribution. Based on the other data shown on the graph, what percentage of Earth's water distribution comes from groundwater sources?
A) 0.77%
B) 20.5%
C) 97.5%
D) 99.7%
Answer:
O.77%
Explanation:
USA Testprep
How did the Ptolemaic model differ from other proposed solar system models?
It said that the planets have epicycles.
It said that the planets rotate on their axes.
It said that the planets revolve around the Sun.
It said that the planets and the Sun revolve around Earth.
Answer:
A
Explanation:
I took this AGES ago mate, i'm hoping ya catch up!
Answer:
A
I took the Test
What causes eclipses? Select three options.
Earth’s rotation on its axis
moon’s shadow covering the Earth
Earth’s shadow covering the moon
Earth’s orbit and moon’s orbit occasionally aligning
the moon and Sun’s gravity pulling in the same direction
Answer:
both C and D
Explanation:
I took the test
During most of the year, the air over Houston, Texas contains a high
amount of moisture. This moisture is known as humidity. The high
humidity causes some people to describe the air as feeling "heavy."
The above statement describes the
of
Houston, Texas.
Select one:
elevation
O
population
o
weather
weather
climate
Answer:
kinda hard to make sense of the question, but if weather is an option, that would be the answer im sure
Explanation:
my brain smart and big
The high amount of moisture in the air, known as humidity, describes the climate of Houston, Texas, where the humidity makes the air feel 'heavy.'
The statement about the air over Houston, Texas, containing a high amount of moisture refers to the climate of Houston. Climate encompasses the long-term patterns of temperature, humidity, wind, precipitation, and other atmospheric conditions in a region. In Houston, the high humidity contributes to the sensation of the air feeling "heavy" because warmer air can hold more moisture, making the humidity levels a significant aspect of the area's climate. The concept of humidity is directly related to the water vapor content in the air, which is why locations with high temperatures, such as Houston, often experience high humidity levels, affecting the local weather and, over time, defining the climate.
A star that is half or less the mass of
is considered a low-mass star.
Earth
B)
the sun
a
red giant
D
the Milky Way
What are the three main types of species interactions that occur in a community?
a.)predation, competition, and symbiosis
B.)predation, diversity, and competition
C.)predation, diversity, and symbiosis
D.)predation, camouflage, and symbiosis
Answer:
a.)predation, competition, and symbiosis
Explanation:
The three main types of species interactions which occur in a community include predation, competition, and symbiosis. Thus, the correct option is A.
What is Species interaction?Species interactions refers to the positive and negative associations between different species which are present in an ecosystem that favors or inhibits the mutual growth and evolution of a population. It may be divided into different forms such as competition, predation, parasitism, commensalism or mutualism.
Relationships between different species in a community is an important factor in natural selection and also helps in shaping the evolution of the interacting species. The three major types of community relationships or species interactions are symbiosis, predation, and competition.
Therefore, the correct option is A.
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Within a freshwater ecosystem, trout eat insects and crayfish. Eagles and otters eat trout. Given this information only, which pair organisms are predators?
A. eagles and trout
B. insects and crayfish
C. trout and insects
D. otters and crayfish
Answer:
Eagles and trout because they are the ones consuming other animals.
1. Disease can be caused by viruses, bacteria,
fungi, parasites, or toxic chemicals. Which of these
diseases is the result of toxic chemicals?
O A. Polio
B. Impetigo
O c. Malaria
OD. Emphysema
Answer:
Emphysema
Explanation:
You get it from airborne stuff like smoke I'm pretty sure.
Emphysema diseases is the result of toxic chemicals which can damaged the lungs of an individual.
What is Emphysema disease?Emphysema is a lung condition that causes shortness of breath. The people who have emphysema, their air sacs in the lungs are damaged. With the passage of time, the inner walls of the air sacs rupture creating larger air spaces in the lungs.
So we can conclude that emphysema diseases is the result of toxic chemicals which can damaged the lungs of an individual.
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PLEASE PLEASE PLEASE Darwin suggested that evolution occurred at a steady, relatively slow rate. Today m, scientists cite fossil evidence to support which revision of Darwin’s suggestion?
A. Evolution occurs slowly in the ocean and rapidly on land.
B. Evolution occurs slowly at the molecular level and rapidly at the organism level.
C. Evolution may sometimes occur very rapidly, in any clade and at any time.
Answer:yo B I think
Explanation:
Cuz evolution is a slow process and it takes time and A dont make any since