Answer:
Motor proteins propel themselves along the cytoskeleton using a mechanochemical cycle of filament binding, conformational change, filament release, conformation reversal, and filament rebinding.
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How do genetics (genetic predisposition) and the environment work together to cause substance abuse in individuals? What is the likely role of epigenetics in this process?
Answer: The drug abuse is influenced by the environment and exerts influence on the gene expressions.
Explanation:
The genetic make up of the person is decides, which genes will be expressed and develop a trait in an individual. But this genetic expression can be influenced by the environmental factors like food, exposure to sunlight, and others. This study which relate environment with the genetic make up is called epigenetics. No person is drug addict by birth but the consumption of drug can influence the genetic make up and traits in a abuser. So here, the environment is influencing the genetic basis of a abuser.
If the Universe was born at the Big Bang, what existed before then
Explanation:
In the beginning, there was an infinitely dense, tiny ball of matter. Then, it all went bang, giving rise to the atoms, molecules, stars and galaxies we see today.
Or at least, that's what we've been told by physicists for the past several decades.
But new theoretical physics research has recently revealed a possible window into the very early universe, showing that it may not be "very early" after all. Instead it may be just the latest iteration of a bang-bounce cycle that has been going on for … well, at least once, and possibly forever.
Of course, before physicists decide to toss out the Big Bang in favor of a bang-bounce cycle, these theoretical predictions will need to survive an onslaught of observation tests.
The initial singularity is a singularity predicted by some models of the Big Bang theory to have existed before the Big Bang and thought to have contained all the energy and spacetime of the Universe.
The burrowing owl is found in dry, open areas such as grasslands, prairies, savannas, deserts, farmlands, golf courses, and urban areas throughout most of western United States and Florida, Central America, and most of South America. It makes its home in burrows of other animals and primarily eats insects and small rodents. As humans build more cities, nearby burrowing owl habitats change due to destruction of burrows and loss of prey. Which is the least likely outcome of the habitat changes that are described?
Answer:
inside under ground holes in the ground
Explanation:
Answer:D
Explanation:
please answer. number 17
Answer: Carbohydrates
Explanation:
Substance A has a mass of 5 g and a volume of 5 g/cmº. What is the Density?
What two simple machines is a stapler made up of?
1. wheel and axle and lever
2. lever and pulley
3. wedge and screw
4. wedge and lever
Answer:
4. wedge and lever
Explanation:
Simple machines are mechanical devices which make our work easier. Examples are : lever, wedge, wheel and axel, pulley, screw and an incline plane.
A stapler is a made up of a level which is the handle part and a wedge which are the staples.
A pulley is a simple machine that has one or more wheels connected with a rope in a loop to make lifting of loads easier because it changes the direction of force applied/pull thus multiplying the force applied. A stapler does not have the wheel and the rope thus answer choice 1 and 2 are incorrect.
A screw is a simple machine that applies torque on a shaft to produce a large axial force on the load. It utilizes the conversion of rotational motion to a linear motion and a torque to a linear force. A stapler mechanism does not involve rotational motion or rotational force, hence answer option 3 is incorrect.
A stapler is made up of a combination of two simple machines: the wedge and the lever. The correct option is 4.
A stapler utilizes a wedge to perform its primary function. The wedge is the part of the stapler that drives the staple through the paper. It has a sharp, triangular shape that allows it to exert a large amount of force over a small area, making it easier to pierce through the materials.
The stapler also incorporates a lever mechanism. The lever is the long arm of the stapler that is pushed down to drive the wedge and staple into the paper.
By applying force at one end of the lever, a mechanical advantage is gained, allowing the user to apply a smaller force to produce a greater force output at the other end, making it easier to staple multiple sheets of paper together.
Therefore, The correct option is 4.
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ASAP 50 POINTS
Osteoporosis is a disease that can cause bone weakening in women due to calcium loss. One group of patients will be taking the regular calcium pill used for treating osteoporosis. Another group of patients will be taking a new calcium pill used for treating osteoporosis. Calcium levels obtained by taking the new pill will be tested over a six month period and the women’s resulting bone mass will be compared between the two groups at the end of six months of treatment.
What is the Independent variable?
Answer:
The Independent variable would be the pills that are being taken.
Explanation:
The Independent variable is the variable that you control because the Dependent variables depend on what the Independent variable is.
What happens to carbon in plants when the plants die?(1 point)
The carbon is not released; it is lost.
The carbon will be released into the soil for use by the next generation.
The carbon is released into the air.
The carbon is released into the soil, but it is not used again.
Answer:
The carbon will be released into the soil for use by the next generation.
Explanation:
I finished the quiz and this was the correct answer.
When the plants die in that case the plants will die and the carbon from the body of the plants gets displaced in the soil. This is the end cycle of the nutrients of plants.
What is the location of carbon in plants ?It is the carbon compounds with the glucose containing the 6 number of carbons and the sugars containing total in 5 numbers of carbons.
As the plants gets the soil there body gets decomposed into the soil and later on the carbon that is absorbed from the atmosphere is given back to the soil and later on they together make the energy sources of carbon in the form of fossils which can be demonstrated later on as well.
And after plants get died, they get decayed by releasing carbon to atmosphere. The difference in the amount of carbon plants get absorbed and they do release is known as the net primary productivity. It is the direct measurement of the amount of how much plant matter is from the crops to the forests or ocean phytoplankton by the Earth produces.
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The Chihuahuan Desert of the United States and Mexico may be the most biologically diverse deser in the world. Extensive grazing has caused the flora and soil of this ecosystem to become unstable. How has biodiversity affected the sustainability of this ecosystem? A Biodiversity has put this ecosystem at risk of being less sustainable in the future.
B Biodiversity has not changed this ecosystem's level of sustainability.
C Biodiversity has prevented this ecosystem from being sustainable.
D Biodiversity has helped this ecosystem remain sustainable.
Answer:
A
Explanation:
Biodiversity has this ecosystem at risk of being less sustainable in the future, because it exposes the land to drought and other adverse conditions not supporting biodiversity in the future.
1. What is the Driving Mechanism of Continental Drift?
Answer:
Holmes proposed that the continents, which “floated” on the Earth's mantle, moved with the convection flow of the magma (hot semifluid below the Earth's crust). The mechanism of continental drift is like the flow of branches floating in the moving waters of rivers, as shown in Figure 3-11.4.
Explanation:
Name 5 groups of vertebrates and give two examples of each
Answer:
fish - seahorse, clown fish
amphibians - frog, lizard
reptiles - alligator, cobra
birds - duck, falcon
mammals - human, cow
Explanation:
easiest way to remember is
franklin(fish) ate(amphibians) really(reptiles) big(birds) meals(mammals)
................................................................
and for the animals that fall under those categories
Sam(seahorse) found(frog) a(alligator) dirty(duck) house(human)
DNA in a cell replicates.
What is this an example of?
Answer:Intracellular communication
Explanation:
The three main climate zones of Earth are at different latitudes. This directly results from different ____________. Group of answer choices
Answer:
Polar, temperate, and tropical.
Explanation:
The biotic and abiotic factors interacting with each
other in a pond form
A) an ecosystem B) a community
C) a population D) a food web
Answer:
Answer is A
Explanation
explain the theorem used in solving for the range of possible lengrhs of the third side AB of ABC
How does the ocean control weather and climate?
Answer:
Explanation:
The ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds.
Which choice shows the correct sequence or order of events for a scientific experiment?
A) Perform experiment -> Form hypothesis -> Analyze data -> Draw conclusions
B) Analyze data -> Form hypothesis -> Perform experiment -> Draw conclusions
C) Perform experiment -> Analyze data -> Draw conclusions -> Form hypothesis
D) Form hypothesis -> Perform experiment -> Analyze data -> Draw conclusions
Answer:
b
Explanation:
analyze data, form hypothesis, perform experiment, draw conclusions
D
Took the test on usatestprep
What is the correct designation for predicting a cross between two heterozygous organisms?
AABB X AABB
AaBB X AaBB
AABb X AABb
AaBb X AaBb
Explanation:
AABB X AABB
AaBB X AaBB
AABb X AABb
AaBb X AaBb
The correct designation for predicting a cross between two heterozygous organisms is: D. AaBb X AaBb
Reproduction refers to a biological process which typically involves living organisms (parents) mating to produce offspring.
Basically, there are two (2) main types of reproduction and these include;
Sexual reproduction.Asexual reproduction.Crossbreeding can be defined as the process of producing offspring by mating two (2) pure-breed living organisms (parents) of two (2) different breeds, varieties, or populations but within the same species.
For two heterozygous living organisms, the correct designation for predicting a cross between them is AaBb X AaBb.
In conclusion, the allele of a cross between two heterozygous living organisms are either dominant or recessive.
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While looking at a cell under a microscope, a scientist is able to see a biological molecule. This molecule is a nucleic acid with a ladder structure and contains the nitrogenous bases adenine, thymine, cytosine, and guanine. Based on this information, what conclusion can the scientist draw regarding this nucleic acid?
Answer:
Based on the information , the scientist concluded that the regarding nucleic acid is DNA (Deoxyribonucleic Acid) .The structure of DNA is attached below -:
Explanation:
PROPERTIES OF DNA -
In humans and almost all other species, DNA, or deoxyribonucleic acid, is an inherited substance. Almost every cell in the body of an individual has the same DNA. The DNA information is stored as a code consisting of four chemical bases: adenine (A), cytosine ( C), guanine ( G) and thymine ( T). In order to form units called base pairs, DNA bases pair up with each other, A with T and C with G. A sugar molecule and a phosphate molecule are both affixed to each base. Together, a nucleotide is called a base, sugar , and phosphate. Two long strands are arranged with nucleotides that form a spiral called a double helix. The double helix structure is much like a ladder, with the base pairs forming the rungs of the ladder and the molecules of sugar and phosphate forming the vertical sidepieces of the ladder.An significant DNA property is that it can duplicate itself or create copies of it. In the double helix, each strand of DNA will serve as a template for duplicating the sequence of bases. As each new cell requires to have an exact copy of the DNA present in the old cell, this is important as cells divide.Hence, the structure identified and conclude by the scientist is DNA (deoxyribonucleic acid). Thus, the structure of DNA is attached below.
Answer:
✓ The nucleic acid is DNA and would be found in the cell's nucleus
Explanation:
8. PLEASE HELP A LOT OF POINTSSS
Answer:
A. Decompose and grass
Explanation:
grass will grow and die and decompose down into soil as it dried off and faded away overtime.
Answer:
c
Explanation:
Frogs and snakes both compete for the same food source! Which is the decomposer!!
Stomach contractions churn and push the liquid chyme and into the small
intestines. This is an example of.... *
Mechanical Digestion.
Chemical Digestion
Both Mechanical and Chemical Digestion
Neither Mechanical nor Chemical Digestion
Answer:
try a mechanical digestion
Explanation:
List and explain 3 different types of mutations.
Answer:
base substitutions-causes sickle-cell disease
deletions- causes deletion syndrome, cystic fibrosis, Turner syndrome, and Williams syndrome
insertions-it can cause all amino acids in the chain after that point to be different. This results in an entirely different protein than the desired one.
Explanation:
Nutrients and waste are passed between cells and blood through _____.
A. arteries
B. veins
C. ventricles
D. capillaries
Answer:
capillaries
Explanation:
they're the points whete the veins and arteries are connected to bloodstream
Rollover accidents contribute to which of the following categories of agricultural workplace hazards?
respiratory risks
excessive noise
unclean conditions
vehicle hazards
Answer:
Unclean conditions
Explanation:
Answer:
Vehicle Hazards
Explanation:
What is the fate of ATP and NADPH?
100 POINTS! PLEASE HELP
Answer:
A: solvent properties
B: melting and boiling points
C: surface tension
D: heat of vaporization
E:density
Explanation: I am pretty sure about most of these Dis the only questionable one please tell me if I am wrong. sorry if I am wrong.
Answer:
A: solvent properties
B: melting and boiling points
C: surface tension
D: heat of vaporization
E:density
Explanation:
What would happen to an ecosystem if a predator like a fox goes extinct
Answer:
Then the prey that the fox eats would over populate and it would mess up the whole ecosystem.
Explanation:
Which of these pairings is correct?
mitosis, part of asexual reproduction because it produces diploids
mitosis, part of sexual reproduction because it produces haploids
meiosis, part of asexual reproduction because it produces haploids
meiosis, part of sexual reproduction because it produces diploids
Explanation:
mitosis part of asexual asexual reproduction because it produces diploids
Answer:
A. mitosis, part of asexual reproduction because it produces diploids
Explanation:
PLEASE I NEED HELP Explain how the process of mitosis is essential to the regeneration of tissue using stem cells
Answer:
Mitosis is essential to the regeneration of tissue because during Mitosis, cells replicate to create a daughter cell that is the exact copy of the parent cell.
Explanation:
The reason this is so important is because stem cells can develop into nearly any cell type. Mitosis allows these cells to replicate the exact cell type needed (in this case, tissue), and create a daughter cell that has the same exact components and characteristics of the parent cell.
What is a buffer? Why is it useful to cells?
Buffer are defined as substances that maintain a constant range of pH by the addition of the base and acid. It is important for cells to maintain the osmotic pressure and pH in the cell environment.
What is the importance of a buffer?In biology, the buffer has been the substances that are organic in nature and are used for regulating and controlling the level of the acids and bases that alters the pH of the system. It plays a crucial role in cells.
It is important for the cell to have a buffer solution, like bicarbonate ions in the blood that maintains the pH and the concentration of the hydrogen and hydroxide ions. It provides regulation of the osmotic balance and maintains the internal environment condition of the cell.
Therefore, the buffer is important for cells.
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