Answer:
According to the “hygiene hypothesis,” the problem with extremely clean environments is that they fail to provide the necessary exposure to germs required to “educate” the immune system so it can learn to launch its defense responses to infectious organisms. Instead, its defense responses end up being so inadequate that they actually contribute to the development of asthma.
Explanation:
A mutagen is
a living thing that has undergone a mutation.
an agent that causes a mutation in DNA.
a mutation that has affected one gene.
any chemical that can poison living cells.
Answer:
B)an agent that causes a mutation in DNA.
have a nice day
Explanation:
Mutagen is the chemical or biological agent that results in mutation in the genetic or the hereditary material of the living organism. Thus, option B is correct.
What are mutagens?Mutagens are substances that can be chemical or biological and causes alterations and modifications in the genetic material of the organisms. They can cause positive and negative damages in the process of the replication and repair mechanism.
UV rays, X rays, ROS, base analogs, alkylating agents, transposons, viruses, etc., are some examples of mutagens that can cause somatic or germline mutations. They can cause silent, missense, nonsense, deletion, addition, or substitution mutations.
Therefore, mutagens cause a mutation by altering the genetic material.
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Fossils are usually
usually found in
Fossils are usually found in Sedimentary rock.
sedimentary rock
Explanation: Most fossils are found in sedimentary rock. Sedimentary rock is formed by dirt (sand, silt, or clay) and debris that settles to the bottom of an ocean or lake and compresses for such a long time that it becomes hard as a rock. Limestone and sandstone are types of sedimentary rock that commonly have fossils.
What’s the correct order?
Which government agency would you expect to be most concerned with the impacts of pollution?
a. Environmental Protection Agency (EPA)
b. Food and Drug Administration (FDA)
C. Bureau of Land Management (BLM)
d. Department of Fish and Wildlife
Answer:
a the Environmental Protection Agency EPA has jurisdiction over all pollution matters
The Environmental Protection Agency (EPA) will be most concerned with the impacts of pollution. Thus, the correct option is A.
What is Pollution?Pollution may be defined as the presence of toxic substances in the environment which are harmful and poisonous to human health and animals to a larger extent.
The Environmental Protection Agency (EPA) has the administration and control over any consequences which are associated with pollution and its derivatives.
Therefore, the correct option is A.
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What type of organic compounds store the most energy per molecule?
lipids
O carbohydrates
O proteins
O nucleic acids
O Lipid Acids
Answer:Lipid Acids
Explanation:
Who is Thomas Malthus?
Answer:
Thomas is an English economist and demographer. He is best known for his theory that population growth will always tend to outrun the food supply and that betterment of humankind is impossible without stern limits on reproduction.
Explanation:
The milk sugar, lactose, is made up of glucose and galactose. Why type of carbohydrate is lactose?
Answer:
disaccharide
Explanation:
WILL GIVE BRAINLIEST
Are the seasons (summer or winter) the same in the Northern and Southern Hemispheres
at the same time? When it is summer in the Northern Hemisphere, what season is it in the
Southern Hemisphere?
Answer: No they don't occur at the same time
Summertime in the northern hemisphere happens when it is winter in the southern hemisphere, and vice versa.
The tilt of the earth causes the seasons. The northern hemisphere's summertime means that the northern part of the earth gets more sunlight compared to the southern half, so the southern half experiences winter.
With the tilt held at the same angle, the earth revolves to another point in space, so that the northern hemisphere receives less sunlight and the southern hemisphere gets more. So the seasons swap.
Answer: Winter
Explanation: The tilt of the Earth determines the seasons for the Northern and Southern Hemisphere. When the Northern Hemisphere tilts toward the Sun, it experiences summer. At the same time, the Southern Hemisphere tilts away from the Sun. It experiences winter.
This woman is riding a bicycle down a hill at a constant speed and in a straight line. Which change will increase the speed of the bicycle?
A. An added force of 20 N to the side of the hill B. Added forces of 30 N up the hill and 20 N down the hill
C. Added forces of 30 N up the hill and 30 N down the hill
D. An added force of 20 N down the hill
An added force of 20 N down the hill will increase the speed of the bicycle, stronger gravity is applied to things with higher masses, hence option D is correct.
What condition if a bicycle down a hill at a constant speed?A force that unites things. You stay on the ground thanks to the Earth's gravity, which also causes things to fall. Everyone and everything is affected by gravity.
Gravity is the force that pulls the cyclist down toward the ground. Riding the bike ahead on a completely level road encounters very little resistance from the effects of gravity.
Cyclist gains speed even when they are not pedaling because the potential energy produced by a hill's height is converted into an equivalent increase in kinetic energy.
Therefore, an added force of 20 N down the hill is correct.
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Which of the following kinds of questions cannot be answered within the limits of science?
explain
what could happen to the community
if all the hares suddenly died
Answer:
they would all be dead
Explanation:
lol this didn't help
Which layers of the atmosphere does the temperature decrease the higher you go?
Answer:
troposphere
Explanation:
The lowest layer is the troposphere where most of the atmospheric gases and all of the planet's weather are located.
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Which contributing factors cause the thermosphere to be warmer than the mesosphere?
A. Gases are more dense in the thermosphere and absorb energy easily.
B. Sunlight is reflected by the abundant gases, oxygen and nitrogen, in the mesosphere.
C. The abundance of hydrogen gas causes explosions, sending heat into the stratosphere.
D. Ultraviolet radiation is absorbed, and fewer air molecules cause the thermosphere to heat quickly.
Answer:
d
Explanation:
suns ultraviolet rays are absorbed in the thermosphere
The contributing factors cause the thermosphere to be warmer than the mesosphere is ultraviolet radiation is absorbed, and fewer air molecules cause the thermosphere to heat quickly.
What are the effects of ultraviolet radiation?The experiment that ultraviolet light made plants grow more slowly is the experiment most likely has greater reliability in which the experiment repeated several times and each time found that plants grow slightly slower with ultraviolet rays because the experiment was repeated with the same.
The main effect of ultraviolet light on plant growth is during photosynthetic active radiation under high level, UV -B light increases the net plant photosynthesis in several plant species.
Higher production of dangerous radiation can be induced under both UV-B and high PAR in young and old plant leaves.When UV light is obtained by plants resins production increases and plant become richer in smelling and better in tasting.Due to increase in resin production the plant is protected from pests and diseases.
Therefore, The contributing factors cause the thermosphere to be warmer than the mesosphere is ultraviolet radiation is absorbed, and fewer air molecules cause the thermosphere to heat quickly.
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which compound is a hydrocarbon?
a. H20
b. CO2
c. C2H6
d. C6H12O6
Answer:
the answer is C
Explanation:
c2h6 is the answer
Which of the following is an example of physical weathering?
Frost wedging
Acid rain
Oxidation
Carbonic acid
PLEASE HELP !!
Answer:
I think it's frost wedging because acid rain oxidation and carbonic acid are all examples of chemical weathering I hope this helps you
A reduction of the amount of product of a particular gene is observed due to a mutation. This type of a mutation is called ____
Answer:
Deletion
When a small segment of chromosome is missing a mutation is called deletion. Since chromosome are made of DNA and DNA constitutes genes so Genes are actually present on chromosomes and when a small segment of chromosomes went missing reduced amount of genes is observed
What is the benefit of diversity in a gene pool?
increased chance of migration.
increased chance of equilibrium.
increased chance of extinction.
increased chance of survival.
Answer:
Increased Chances of Survival
Explanation:
Genetic diversity we could say as Variation in a gene pool and it serves as a way for populations to adapt to changing environments, So if there is any environmental change, With more variation it more likely that some individuals will have variation of allele in them that suits the change so they will have brighter chances of surviving.
An increased chance of survival is the benefit of diversity in a gene pool.
Increased Adaptability: A broad gene pool produces a population with a wider range of genetic features and variants. Due to this diversity, there is a greater chance that an individual may have favorable qualities that will allow them to adapt to shifting environmental factors like temperature, resource availability, or the prevalence of diseases. Individuals with genetic variants that are advantageous in the altered environment are more likely to survive and pass on their genes to succeeding generations.
Better Resilience: A diversified gene pool acts as a defense against potential dangers and difficulties. A population with a diverse range of genetic variations is more likely to have some members who are immune to or resistant to particular illnesses, predators, or other stressors.
Hence, an increased chance of survival is the benefit of diversity in a gene pool.
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When are acids used in the human body?
Answer:
The most commonly-known way is in the stomach, during digestion.
who used a compound microscope to see chambers within cork amd named them cells
Answer:
robert hooke
Which biome has low nutrient quality soil?
coniferous forest
tropical forest
deciduous forest
boreal forest
Answer:
Tropical
Explanation:
The high temperature and moisture of tropical rainforests cause dead organic matter in the soil to decompose more quickly than in other climates, thus releasing and losing its nutrients rapidly. The high volume of rain in tropical rainforests washes nutrients out of the soil more quickly than in other climates.
Answer:
it boreal forest also known as tiaga
Explanation:
The northern Eurasian coniferous forest is called the taiga or the boreal forest. Both terms are used to describe the entire circumpolar coniferous forest with its many lakes, bogs, and rivers. Coniferous forests also cover mountains in many parts of the world.
Describe Claire's symptoms. Explain how they were related to metabolism and homeostasis.
Answer:
Claire's symptoms suggest that lately, she is not enjoying her work which she was very fond of due to her poor eyesight. She is tearful while reading, she is afraid of her role as a mother for their kids in the future, she is worried for her mother. She can not sleep without sleeping pills. she put 30 pounds as she is not active and watches television or the internet all-day.
Metabolism is the process that maintains the body and cell of an organism by involving various chemical reaction that helps in extracting, storing, and utilizing the energy. Homeostasis and metabolism are related to one another as metabolism is required to maintain homeostasis and homeostasis are required for efficient metabolism.
You have been studying the lysosomal enzyme cathepsin D in mammalian cells. To look at the localization of the enzyme, you incorporate 32 P into the cells over a long period of time and collect fractions of the cell lysate corresponding to various organelles. Much to your surprise, you find cathepsin D was isolated in the ER fraction, and it contains 32 positive sugar side chains. However, when you pass this enzyme through an affinity chromatography column containing mannose-6-phosphate receptor conjugated to resin, the enzyme passes straight through. However, your cousin calls you up and tell you that she modified your cell line. She claims that she deleted your endogenous cathepsin D gene and transfected a plasmid containing a cathepsin D gene with a Lys-Asp-Glu-Leu (KDEL) sequence on the C-terminus.a) Why is the lysosomal enzyme found in the ER fraction rather than in the lysosomal fraction?b) Explain why the modified enzyme does not bind to the mannose-6-phosphate receptor.
Answer:
Explanation:
1.
Cathepsin is involved in programmed cell death, it is a lysosomal enzyme and the reason it is found in the ER fraction instead of the lysosomal fraction is because of its c terminal KDEL sequence. this sequence ia a retrieval for protein and causes a backward movement of protein back to endoplasmic reticulum. that is why cathepsin seems to have localised in ER instead of the lysosomal fraction
2 It does not bind to mannose-6-phosohate receptor because this glycosylation process does not occur in the E.R but in Golgi bodies. because of the KDEL sequence this glycosylation of cathepsin would not occur and cathepsin would go through affinity column without any form of binding to receptor.If cathepsin can get to the Golgi then glycolysation with Mannose6phospate can occur.
What are the types of organs in the urinary system
Answer:
kidneys, renal pelvis, ureters, bladder and urethra.
Explanation:
can someone help me with the worksheet below
P.S i am not in college im in 5th grade but i thought it wouldnt let me have an account if i was 11
Answer:
i think you can have an account starting from middle school, but ill gladly help.
1. tissues
2. skin
3. connective tissues
4. brain
5. organ
6. taste buds
7. epithelial tissues
8. organ systems
9. organism
10. nerve tissues
The image below shows salamander skin cells as viewed under a microscope. The activity occurring inside the rectangle best supports which scientific theory?
Temand win PDB 1000
Appeared in The
O cell theory
O germ theory
O gene theory
O endosymbiotic theory
Type here to search
Answer:
A. Cell theory.
Explanation:
The image above shows salamander skin cells as viewed under a microscope. The activity occurring inside the rectangle best supports a scientific theory known as cell theory with respect to cell division.
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Cell theory states that cell is the basic unit of life, all living organisms are made up of one or more cells and they typically arise from existing cells i.e pre-existing cells give rise to new ones through the process of cell division.
From the image of the salamander's skin cell, we can see that it comprises of many cells and are these look very much alike, meaning they are from pre-existing cells.
Which of the following is not part of the scientific process?
A. making predictions
B. asking questions
C. using creative insight
D. proving theories are true
Answer:
The correct answer is C- using creative insight
3. Which of the following statements explains the importance of carbon in cells? (Choose all that apply
carbon is a waste products for a cell.
i just took the test
The statement that explains the importance of carbon in our cells is that carbon affects the function of the cell. So the correct option is A.
What is the importance of carbon?
The most common chemical element present on our Earth is carbon. It has the symbol C and an atomic number of 6. The carbon atom is a member of the fourteenth group present on the periodic table.
The word carbon is derived from the Latin word 'carbo', which means coal. Carbon is also the 15th most abundant element that is present in the crust of the Earth. On the earth, carbon is the fourth most abundant element ranked after hydrogen, helium, and oxygen.
Carbon atoms, when bonded together in different ways, are called as allotropes of carbon. Diamond, graphite, and amorphous carbon are the three allotropes of carbon.
They have different properties. Graphite is one of the softest known substances while diamond is the hardest known substance.
Therefore the correct option is A.
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QUESTION 1
1 pol
Which of these is an example of quantitative data?
A scientist test for the presence of starch using an iodine test that changes color if starch is present but does
not indicate how much starch is present.
O A scientist asks human subjects taking a new medication how much better they feel on a scale of 1-5.
Scientists record how a liquid smells to them at the end of an experiment.
A scientist measures the change height in plants that were watered with different levels of nitrogen
Answer:
A scientist test measures the change height in plants that were watered with different levels of nitrogen is an example of quantitative data
use your own words to explain planetary gravitation. provide an example.
plz help i need this done fat thank you
Answer:
1,4,5
Explanation: