The type of damage to DNA structure that is most likely to be caused by UV light is pyrimidine dimers.
UV light can cause the formation of covalent bonds between adjacent pyrimidine bases, particularly thymine, leading to the formation of pyrimidine dimers. This causes a distortion of the DNA helix, which can interfere with replication and transcription, and can lead to mutations. Pyrimidine dimers are particularly common in organisms that are exposed to UV light, such as bacteria and plants, but they can also occur in human cells. The body has mechanisms to repair pyrimidine dimers, but if the damage is too extensive, it can lead to skin cancer and other health problems.
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A student has several pet hermit crabs. He wants to determine how the hermit crabs choose which shell they inhabit. He thinks that the crabs choose their shells based on the shells' color and wants to design an experiment to test this. Which of these steps should the student include in his experiment? A. He should add shells that are different colors, but the same size and type, to the tank and observe which shells the hermit crabs choose. B. He should observe hermit crabs in their natural environments and determine how shells help protect them from predators. C. He should place the hermit crabs in different tanks and change the temperatures in the tanks to see if it effects their shell selection. D. He should gather shells that are different sizes and different colors, place them in the tank with the hermit crabs, then observe which shells they choose. Reset Next Question
Which of the following statements is correct about air temperature?
When air temperature is higher, the weather is warmer.
Warm air falls to the ground.
Freezing air temperatures increase the chances of rain.
When air temperature is higher, the weather is colder.
Answer:
Answer is freezing air temperatures increases the chances of rain
Explanation:
Answer:
When air temperature is higher, the weather is warmer
Which of the following represents a cross between two heterozygous plants?
A. Ww x WW
B. ww x WW
C. Ww x Ww
D. WW x WW
How is food produced?
Answer:
Most food produced for the food industry comes from commodity crops using conventional agricultural practices. Agriculture is the process of producing food, feeding products, fiber, and other desired products by the cultivation of certain plants and the raising of domesticated animals. On average, 83% of the food consumed by humans is produced using terrestrial agriculture.
Explanation:
Answer:
Explanation:
Most food produced for the food industry comes from commodity crops using conventional agricultural practices. Agriculture is the process of producing food, feeding products, fiber, and other desired products by the cultivation of certain plants and the raising of domesticated animals.
How many alleles are typically found for mitochondrial genes?
1. 8
2. 1
3. 4
4. 2
Answer:
The answer is 2.1
Answer:
two alleles
Explanation: because This dynamic aspect of mitochondrial transmission from cell to cell is termed mitotic segregation. In Mendelian genetics, a person's nuclear DNA can contain, at most, only two alleles for any particular autosomal gene, one paternally derived (e.g., allele “A”) and the other maternally derived (e.g., allele “B”).
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What is tendonitis?////////////////////////////////////////////////////////
In a sex linked trait, the recessive phenotype is most often found in males because...
Answer:
X-linked recessive diseases most often occur in males. Males have only one X chromosome. A single recessive gene on that X chromosome will cause the disease. The Y chromosome is the other half of the XY gene pair in the male.
Explanation:
Why are you learning this stuff anyways.Girl????????
What is an extreme disturbance to any ecosystem? (1 point)
Elk overgrazing
Hurricanes
Coral bleaching
Extreme temperature change
When an ecosystem is disturbed by fire or toxic chemicals, it affects (1 point)
One type of habitat in the ecosystem
One type of food source in the ecosystem
Living things in that ecosystem
Only a particular species in that ecosystem
If deer are not hunted every season, a potential result is (1 point)
The predator population will decrease
The deer population will decrease
The plant population will increase will increase
The smaller herbivore population will decrease
An example of a severe disruption to an ecosystem is (1 point)
A seasonal flooding of a river
A thunderstorm that knocks down some trees
Repurposing a building in a downtown area
The loss of a river system due to contamination
If an ecosystem irreversibility destroyed, species unable to travel or adapt will (1 point)
Find a new food source
Die out in the area
Find additional mates
Grow in population
Answer:
1.) extreme temperature change
2.) living things in that ecosystem.
3.)the smaller herbivore population will decrease.
4.) the loss of a river system due to contamination.
5.) die out in the area.
Explanation:
Just took the QC
What can be considered as an extreme disturbance to any ecosystem is :extreme temperature change.
Whenever, there is a disturbance in terms of fire or toxic chemicals to ecosystem, then : living things in that ecosystem.
In a case, whereby no one hunt deer, then there would be decrease in smaller herbivore population.
loss of a river system due to contamination can be considered as a of a severe disruption to an ecosystem.
When there is irreversibility destroying of ecosystem, then :species unable to travel or adapt will die out in the area.
An ecosystem can be regarded as geographic area which encompass plants, animals as well as weather relate together.One of disturbance that occurs in an ecosystem is extreme temperature.Learn more at:
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How do human lifestyles affect sustainability?
an example of prokaryotic cell is a ___ cell
Answer:
A bacterium
Explanation:
Prokaryotic cells lack a nuclear envelope, so what would be their nucleus is just kind of floating around inside of them.
Which of the following answers is NOT correct with regard to convection currents?
A. Convection currents in magma drive plate tectonics.
B.Convection currents in magma are a result of density differences.
C. Convection currents play a role in the movement of Earth’s inner core.
D. Convection currents in magma are caused by temperature differences.
Answer: C....Convection currents play a role in the movement of Earth’s inner core
The statement which is not correct with regard to convection currents is as follows:
Convection currents play a role in the movement of Earth’s inner core.Thus, the correct option for this question is C.
What is Convection current?Convection current may be defined as a procedure that significantly involves the movement of energy from one place to another. It is basically the existence of current in a fluid through convection.
The inner core of the earth has appeared as solid as compared to other parts like the crust and mantle. Most liquid particles are definitely found on the mantle of the earth's surface.
Due to the presence of excessive liquid particles and compounds, the convection current is significantly noticed there.
Apart from this, magma is also a fluid that derives current through convection. It produces in a number of ways like magma driving plate tectonics, density differences in the magma, and temperature differences.
Convection currents are basically the movement of fluid with respect to temperature or density difference within the material.
Therefore, the correct option for this question is C.
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Please help me I beg you please help
Answer:
A-T
T-A
T-A
C-G
A-T
G-C
G-C
C-G
T-A
A-T
Answer:
ATTCAGGCTA= TAAGTCCGAT
Explanation:
adenine pairs with thymine with 2 hydrogen bond in DNA and cytosine pairs with Guanine with 3 hydrogen bonds .
Try to move the different parts of the body
by moving it back and forth, side to side,
rotating, and swinging.
The given question is incomplete, however, the missing part is as follows:
body parts movement
neck _____
lower arm _______
upper arm ________
wrist __________
shoulder _________
skull _________
knee _________
hipbone _________
elbow _________
ankle _________
Answer:
The correct answer is given as follows:
Explanation:
A. side to side
B. swinging
C. rotating
D. rotating
E. rotating
F. back and forth
G. swinging
H. side to side
I. back and forth
J. rotating
How do free energy machines work?
Explanation:
The machine is plugged into an electrical source,which gets plugged the motor's wheel spinning.The machine is then unplugged and the wheel keeps spinning under its own interia. Then electrical energy is extracted from the spinning wheel.
I hope it's helpful!
what do the arguments for and against the use of stem cells in medical research share?
Answer: Stem cell research can potentially help treat a range of medical problems. It could lead humanity closer to better treatment and possibly cure a number of diseases:
Parkinson’s Disease
Alzheimer’s Disease
Heart Diseases, Stroke and Diabetes (Type 1)
Birth Defects
Spinal Cord Injuries
Replace or Repair Damaged Organs
Reduced Risk of Transplantation (You could possibly get a copy of your own heart in a heart-transplantation in the future
Stem cells may play a major role in cancer
Better treatment of these diseases could also give significant social benefits for individuals and economic gains for society
Cons
"We should not mess with human life."
"Humans should not be trying to play God"
Some argue that stem cell research in the far future can lead to knowledge on how to clone humans. It is hard to say whether this is true, but we have seen devastating consequences of other research-programs, even with good intentions, such as nuclear research.
Stem cells are cells, which have the ability to transform into many different types of cells. The stems cells have the potential to specialize in any type.
The stem cells are extensively used for research, curing diseases, and especially in developing prosthetics. The stems cells provide new cells for the growth and development of the replaced and damaged cells.
The arguments for and against the use of stem cells are:
Arguments for the use of stem cells in medical research are:
1. The stem cells enhance the growth and development of healthy skin tissue.
2. The cells can be used to enhance the production of collagen.
3. The study of stem cells helps in understanding the causes of disease.
Arguments against the use of stem cells in medical research are:
1. The use of stem cells for research harms human life and dignity.
2. People believe that killing blastocysts or stem cells is equal to taking a human life.
3. However, the transplant of stem cells can be rejected by the patient's body, therefore, can cost the life of the patient.
Therefore, the use of stem cells for research can be fruitful or disadvantageous.
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please HELP MEEEEEEEEEEEEEEEEEEEEEE
Answer:
Yes tell the question brooooooooooooooooooooo
Explanation:
where 's your question ??:))
What provides the genetic material of an organism
Answer:
its parents.
Explanation:
Which events are most common along tectonic plate boundaries
A) erosion and earthquakes
B) hurricanes and tsunamis
C) earthquakes and volcanoes
D) tidal waves and volcanoes
Answer:
C. Earthquakes and volcanoes
Explanation:
finished this topic in my class.
what is pseudopodia?
Answer:
Pseudopodia are temporary and cytoplasm-filled parts of the cell membrane that are able to change their form in order to move.
Explanation:
Pseudopodia are temporary and cytoplasm-filled parts of the cell membrane that are able to change their form in order to move. They are used in some eukaryotic cells to move around or to eat. Most cells that do this are called amoeboids. The amoeba is a common example. ... Pseudopods can also capture prey by phagocytosis.
if epigenetic changes take place above the level of the genome , what would be an example of a change at the level of the genome ?
Answer:
epigenetics chamges take place.
Epigenetics is the examination of the way cells manipulate gene interest without converting the DNA series." Epi-"approach on or above in Greek, and "epigenetic" describes elements past the genetic code.
Epigenetic changes are adjustments to DNA that modify whether or not genes are grown to become on or off. These adjustments are connected to DNA and do now no longer alternate the series of DNA constructing blocks. Within the entire set of DNA in a (genome), all the adjustments that modify the interest (expression) of the genes are referred to as the epigenome.
Because epigenetic changes assist decide whether or not genes are grown to become on or off, they affect the manufacturing of proteins in cells. This law facilitates making sure that everyone produces the handiest proteins which might be essential for its function. For example, proteins that sell bone boom aren't produced in muscle cells.
What is the epigenetic pattern?Patterns of epigenetic change range amongst individuals, in one-of-a-kind tissues inside an individual, or even in one-of-a-kind cells inside a tissue. Environmental influences, together with a person’s food plan and publicity to pollutants, can affect the epigenome. Epigenetic adjustments may be maintained from cell to as cells divide and, in a few cases.
Hence concluded that Epigenetics changes and causes cancers, by changing the genome, epigenome, or both.
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The coronavirus attaches to a membrane protein called
Answer:
M glycoprotein..
The coronavirus attaches to a membrane protein called M glycoprotein..
how to control diarrhoea
Answer:
Diarrhea should go away in a few days without treatment. until you feel better, rest, drink enough fluids, and watch what you eat.
Explain why is important to know some biology in the middle of a pandemic
What are the 6 lobes of the brain and where are they located?
Answer:
Frontal lobe.
Parietal lobe.
Occipital lobe.
Temporal lobe.
Limbic lobe.
Insular cortex.
The four lobes of the brain are the frontal, parietal, temporal, and occipital lobes (Figure 2). The frontal lobe is located in the forward part of the brain, extending back to a fissure known as the central sulcus. The frontal lobe is involved in reasoning, motor control, emotion, and language.
Explanation:
What other cell types does skeletal muscle cell
associate with? How do they interact?
Explanation:
Skeletal muscle cells
Muscle cells, commonly known as myocytes, are the cells that make up muscle tissue. There are 3 types of muscle cells in the human body; cardiac, skeletal, and smooth. Skeletal muscle cells are long, cylindrical, multi-nucleated and striated
Which part of the brain stem controls the heart rate and respiratory rate?
pons
thalamus
medulla oblongata
midbrain
Answer:Medulla
Explanation:
Answer:
Medulla Oblongata
Explanation:
The primary role of the medulla is regulating our involuntary life sustaining functions such as breathing, swallowing and heart rate. As part of the brain stem, it also helps transfer neural messages to and from the brain and spinal cord. It is located at the junction of the spinal cord and brain.
Can hydrogen peroxide be broken down by catalysts other than those found in a living system? What is/are the control(s) and why are they needed?
Answer:
hi I not talk spanish
Explanation:
not talk spanish
What is a complex Sugar? Please a specific answer(make more sense)
Answer:
Complex carbohydrates are MADE up of sugar molecules that are strung together in long complex chains, complex carbohydrates are found in food like peas, beans, whole grains and vegetables.
Explanation:
Both SIMPLE and COMPLEX carbohydrates are turned into glucose (blood sugar) in the body and are used as energy.
I really hoped this helped some, I tried to make it specific :[
II. Which animal is the top predator in many wetlands?
A. Raccoons
B. Alligators
C. Snakes
D Owls
Answer:
Its B. Alligators. Yup they are the top predators
Hope this helped
All the best ！！
Answer:
B alligators cause wet and crocodals are wet
Biology - need ASAP. will mark brainliest
Describe the main ways in which the blood helps you to avoid infection. Include a description of the parts of the blood involved.
(6 marks)
Answer:
Blood brings oxygen and nutrients to all the parts of the body so they can keep working. Blood carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system to be removed from the body. Blood also fights infections, and carries hormones around the body.
Explanation: