Answer:
Both A and B
Explanation:
can you suggest me some biology experimental project work topics?
Answers:
1. General
2. Reproduction
3. Health
4. Genetic Engineering
5. Technical Experiments on Humans
6. Relationships and Media
7. War
8. Information and Communication Tech
9. Computer Science and Robotics
What molecule is required each time the myosin head detaaches from one site and reattaches to another
Answer:
The adenosine triphosphate (ATP) molecule
Explanation:
The actin filaments are often associated with myosin to produce muscle contraction. These myosin filaments are considered to be 'molecular motors' capable of converting the chemical energy contained in the ATP molecule to mechanical energy, thereby producing cell movement. Myosin heads bind to actin filaments in order to generate a power stroke. When the adenosine triphosphate (ATP) molecule binds to myosin, the myosin head detaches to the actin filament. During this process, the ATP molecule is broken down and then the released energy is used by the myosin filament to return to its original position.
Select the correct answer from each drop down menu.
During an experiment, readings for blood pressure in a person's body were found to be constant. However, when measured by a
different blood pressure cult, the readings differed by 15 points for each reading. This difference indicates that the results are
but not
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dimentum. All rights reserved
Answer:
The results are precise but not accurate
Explanation:
Precision is the term that refers to the degree of agreement between measured results. This means that the measurements of the finished system are very similar and with equal differences, under the same conditions.
An example of this is the results shown in the question above, which are very similar. In addition, these results do not have the "real and absolute value" and therefore are not accurate.
Compared to its surroundings, the concentration of solutes is low inside a cell. So, the cell is in a
for its transport from the cell to its surroundings. This type of transport is called
solution. A particular solute in this cell uses energy
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Answer:
Passive transport.
Explanation:
Osmosis occurs in the cell which is a type of passive transport. Passive transport refers to the transfer of solutes from one place to another without the expenditure or use of energy. Osmosis refers to the transfer of solutes from outside the cell into inside the cell through a semipermeable membrane which allow solutes which are small in size. This process occurs only when the concentration of solute is different inside and outside of the cell. while active transport is a type of transport which transfer solutes from one place to another with the use of energy in the form of ATP.
A cell pumps hormones out into the bloodstream; a process that requires energy. If 4 ATP were converted to ADP, how much energy was used?
A. 4 kJ
B. 30.5 kJ
C. 122 kJ
D. 1600 kJ
It is 122KJ of energy is used from the conversion of ATP to ADP because hydrolyses of 1 mole of ATP requires 30.5KJ of energy. Therefore, if 4 ATP is hydrolyses, it will be 4× 30.5=122KJ. ... This energy is given out because there is cleavage of high energy phosphate bond in ATP while converting it into ADP.
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Smooth endoplasmic Reticulum has ribosomes attached to its surface. correct and rewrite the following.
Answer:
See below
Explanation:
The correct statements can be two of the following:
1) Rough Endoplasmic reticulum has ribosomes attached to it.
2) Smooth endoplasmic reticulum do not have ribosomes attached to it.
which could describe the chemical reaction that is shown
Answer: dehydration of proteins.
Explanation:
Determine if the statement is true or false, and why. “Most features are caused by a mixture of inheritance and environmental factors.”
A. False, it should read “Most features are caused by inheritance.”
B. True
C. False, it should read “Most features are caused by environmental factors.”
D. False, it should read “All features are caused by a mixture of inheritance and environmental factors.”
The statement is False, it should read, Most features are caused by inheritance of a character. Thus option A is correct.
What is inherited trait ?Inheritance is defined as the transfer of genetic information from parents to their offspring.
The transferred characters or traits include eye color, hair color, and blood type.
Trait can be defined as the genetic character which can be transmitted by the parent to its offspring during fertilization.
The trait which is expressed phenotypically is called as dominant trait while the other trait which is not expressed called as recessive trait.
These variations are observed in the species due to survival benefits or genetic drift.
Acquired traits are acquired by an individual in his lifetime which is due to their own activities or external influence.
Like inherited traits, acquired traits are unable tp pass to the next generation like ability to dance, cook.
Thus option A is correct.
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The plateau phase of population growth is best described as: A. The population stops growing because they moved into the plateau environment at this stage. B. The population pauses in its growth after a natural disaster before growing again. C. The population moves onto a large, raised, flat area called a plateau for protection from predator. D. The population stops growing because the environment has reached its carrying capacity.
Answer:
C. The population moves onto a large, raised, flat area called a plateau for protection from predator.
Explanation:
The plateau phase of population growth indicates that the population has stopped growing as the environment has reached its carrying capacity.
What is the plateau phase in population growth?The population after going through different phases eventually reaches the plateau phase where the growth of the population stops or become constant. This is the outcome of the natality rate becoming equivalent to the mortality rate.
This occurs as the resources in the environment become less or scarce as well as there is an elevation in predators and parasites. These are considered as limiting factors to the growth of population. This makes the population number relatively stable. With the limitation in the resources it can be said that the environment has attained its carrying capacity.
Thus, the correct statement is option D.
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Consider this animal cell. The organelles in an animal cell are labeled. Part E represents small dots on the nucleolus. What is the function of the small, dark organelles labeled E? They contain enzymes for the digestion of old cell parts. They regulate what enters and leaves the cell. They produce proteins for the cell. They store water and other materials.
The dark organelles labelled E is called the Ribosomes.
In order for a physical barrier to be effective in preventing infection, the barrier must __________. A. prevent the substance from entering the body, trap the substance when it first enters the body, or flush the substance out of the body B. destroy the substance before it enters the body, prevent the substance from reproducing, or flush the substance out of the body C. trap the substance in t
Answer:
a
Explanation:
Considered the "Command Center for the Endocrine System", the ______________ is a major link between the nervous and endocrine system as it is a major regulatory center in the nervous system, as well as a crucial endocrine gland that can synthesize at least nine different hormones.
Answer:
"Command Center for the Endocrine System", the hypothalamus is a major link between the nervous and endocrine system as it is a major regulatory center in the nervous system, as well as a crucial endocrine gland that can synthesize at least nine different hormones.
Arctic sea ice has declined over the past few decades causing water levels to increase. This is an interaction of which two spheres?
Answer:
Cryosphere and Hydrosphere
Explanation:
The Cryosphere refers to the frozen water bodies on earth. This includes glaciers, icebergs, ice sheets and frozen water surrounding the Arctic and Antarctica.
The Hydrosphere refers to all the water bodies on Earth, including rivers, streams, lakes, and ponds.
Answer:
Cryosphere and Hydrosphere
Explanation:
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what happens to the chromosomes if nondisjunction occurs during meiosis one versus meiosis two
Answer:
Nondisjunction is defined as the failure in the separation of homologous chromosomes or sister chromatids during nuclear division.
Nondisjunction occurs in both phases meiosis one (I) and meiosis two (II) during anaphase but both in both phases nondisjunction is different.
In meiosis I, homologous chromosomes fail to separate while in meiosis II, sister chromatids fail to separate.
What is a protein that is the main component of the thick filaments in muscle fibers and is responsible for muscle contraction?
Answer:
Myosin
Explanation:
Two of the important proteins are myosin, which forms the thick filament, and actin, which forms the thin filament. Myosin has a long, fibrous tail and a globular head, which binds to actin. The myosin head also binds to ATP, which is the source of energy for muscle movement
Answer: actin
Explanation:
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Answer:
d
Explanation:
Answer: D, I believe.
Explanation:
One reason cancer cells are easier to culture than normal cells extracted from an organism is that ________. Group of answer choices cancer cells grow in a more regulated fashion. cancer cells do not need to adhere to a substratum to grow. nutrient requirements for cancer cells are precisely defined. cancer cells are better models for demonstrating what happens in an intact organism.
Let's list the given options alphabetically to choose the appropriate answer.
One reason cancer cells are easier to culture than normal cells extracted from an organism is that ________. Group of answer choices
A. cancer cells grow in a more regulated fashion.
B. cancer cells do not need to adhere to a substratum to grow.
C. nutrient requirements for cancer cells are precisely defined.
D. cancer cells are better models for demonstrating what happens in an intact organism
Answer:
B.
Explanation:
Cancer cells are easier to culture in comparison to normal cells because cancer cells do not need to adhere to a substratum to grow.
As cancer cells are uncontrolled growth of cells and they do not require any substratum to grow and can easily grow to a culture while a normal cell require optimal conditions to grow in a culture.
Hence, the correct option is "B".
what is the hypothesis
Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Explanation:
Answer:
what you think is gonna happen in an experiment
Explanation:
Which type of energy do you think is better: SOLAR ENERGY or WIND ENERGY?why do you think that ?
Answer:
wind energy
Explanation
wind power is more efficient than solar power or energy because this system use less energy release less carbon dioxide to the atmosphere and produce more overall energy a single wind turbine can generate same amount of electricity in Kwh as thousands of solar power panels
Answer: Wind Energy
Explanation: Wind power is considered more efficient than solar because they use less energy, release less carbon dioxide and produce more energy overall.
Wind energy runs 24 hour a day since it doesn't depend on sunlight to create energy unlike solar energy panels.
"When human settlers arrived on the island of Mauritus, they caused the Dodo bird species to become extinct within 50 years. What did the settlers do to cause their extinction?"
Answer:
It's commonly believed that the dodo went extinct because Dutch sailors ate the beast to extinction after finding that the bird was incredibly easy to catch due to the fact it had no fear of humans.
Explanation:
Besides plants, what other factor distinguishes one biome from another biome?
(A) the number of plant species in the biome
(B) the variety of animal species
(C) average temperatures and precipitation
(D) geographic location
In soccer, Hai is a goal scorer who plays in forward positions, always keeping his eyes trained on the ball and chance to put one past a goalkeeper. He's not above playing advantages. "(Other players) don't want to hurt me," he said. "I try to juke them." His coach said opponents soon learn to play him honestly or pay the consequences
Complete question reads;
Read the following paragraph from the article.
In soccer, Hai is a goal scorer who plays in forward positions, always keeping his eyes trained on the ball and chance to put one past a goalkeeper. He’s not above playing advantages. “(Other players) don’t want to hurt me,” he said. “I try to juke them.” His coach said opponents soon learn to play him honestly or pay the consequences.
Which idea is BEST supported by the above paragraph?
(A) Hai's coach recognizes that Hai needs to be protected from bullying.
(B) Hai is a very skilled soccer player who consistently outdoes his peers.
(C) Hai's coach wants Hai to understand that it is not acceptable to cheat to win a soccer game.
(D) Hai is sometimes underestimated by other players, and he uses this to his advantage.
Answer:
(C) Hai's coach wants Hai to understand that it is not acceptable to cheat to win asoccer game.
Explanation:
The expression, "pay the consequences" as used by Hai's coach indicates his intention of letting Hai know the rules governing soccer; meaning there's a penalty when opponents hurt a rival player.
Interestingly, in the game of soccer, it is a foul to deliberately bring down your opponent. Major consequences arrive when a player receives a red card from the referee, due to an offense committed by the player; the red card indicates that the player would be sent out of the court.
Last electron level that has an electron in it.
Group of answer choices
Valence Level (Shell or Cloud)
Atom
Electrons
Atomic Symbol
As human travel increases, the number of introduced species likely
decreases.
increases
stays the same
is eliminated
Answer: The correct answer to the question is option B
INCREASES.
As human travel increases(As humans move from one place to another),the number of introduced species likely increases because as humans move from one place to another,they introduce new species of organisms to their new environment.
These non-native species grow in this new environment,becomes economically important and doesn't pose any harm to their new ecosystem unlike invasive species that poses a substantial harm.
The number of introduced species are likely to : ( B ) Increases
As Humans migrate from one place to another they introduce new species into their new environment naturally or artificially.
MigrationThe movement of humans or any type of organism comes with the introduction of new species because as they move they take along with them certain species that naturally do not belong to their new environment.
Hence we can conclude that As human travels The number of introduced species are likely to Increase.
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If a cell has 24 pairs of chromosomes in its diploid state, how many
chromosomes will it have after Meiosis 2?
A. 12
B. 24
C.48
D. 6
Answer:
option A is correct that is 12
Explanation:
meiosis occur in two phases in first phase DNA replication occur and amount of DNA become doubled without any change in the chromosome number and two daughter cell (each 2 n)are formed.
now in stage 2 each daughter cell undergoes mitosis with the formation of two cells with half chromosomes(n)
now 2n=24
n=24/2 =12
after meiosis stage 1...........two daughter cell each with 24 chromosomes
stage 2 .............each daughter cell form two grand daughter cell each with 12 chromosomes
net result.......4 daughter cell each with 12 chromosome(assuming cell as a diploid cell)
If a cell has 24 chromosomes before cell division then the daughter cell resulting from the mitotic division will have 24 chromosomes while the daughter cell resulting from the meiotic division will contain 12 chromosomes each.
The answer is option A.
What are meiotic and mitotic cell divisions?There are sorts of cell departments: mitosis and meiosis. most of the time whilst humans discuss “cellular division,” they suggest mitosis, the procedure of making new frame cells. Meiosis is the sort of cell division that creates egg and sperm cells. Mitosis is an essential technique for lifestyles.
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Name some eco-friendly features you might look for while shopping for your first vehicle. Also, explain techniques you can use while driving any vehicle to increase fuel efficiency and reduce emissions
Answer:
Eco friendly features are the characteristics of a car which helps to prevent and reduce water, air and land pollution to the barest minimum.
These features include Emission Sensors, LED Lights, Hybrid Engines, Radar Alerts and Air Filtration Systems.
Techniques you can use while driving any vehicle to increase fuel efficiency and reduce emissions include driving conservatively, use of speed bumps and regular maintenance.
Some eco-friendly resources that you can look for when buying your first vehicle, that it is not powered by fossil fuels, so it can be powered by electricity or hybrid, with that, it is still necessary to continue using your car correctly so as not to emit other pollutants, to know more.....
Ecological carA hybrid ecological car, powered by solar energy and even electricity, brings numerous benefits to the environment. These vehicles are the ones that mix the use of electricity and fuel to move around. Generally, at low speeds, electricity is used as the main form of movement and gasoline only kicks in when high speeds are required.
The models powered by solar energy and electricity do not use fuel to move. The great advantage of this for the environment is the reduction in the emission of pollutants, such as CO2, which actively participates in the greenhouse effect and consequent global warming. With the use of ecological vehicles, our planet must become a better place to live.
With this information, we can conclude that choosing a car powered by renewable energy is the best option to choose, to maintain the ecological balance and health of the planet.
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Use the image to answer the question below: Using the model presented, what process is being depicted? A) An electrical signal being converted to a chemical signal B) Salutatory conduction C) The transfer of neurotransmitters between axons D) The path of a steroid hormone
Answer:
option A is correct because of it is undergoing a convertion
Discussion
1. What changes occurred in the diameter of the onion rings that were immersed in the distilled
werter and concentrated sucrose solution? State the difference in the concentration of water
molecules in the onion cells and the solutions.
(a) Distilled water
(b) Concentrated sucrose solution
2. Explain why the changes occurred in the onion rings immersed in:
(a) distilled water;
(b) concentrated sucrose solution.
In this case, it is important to have into account the properties of hypertonic (sucrose) and hypotonic (distilled water) solutions:
Sucrose solution (higher concentration of water molecules in the onion cells) >> red onion cells will shrink >> smaller diameter.Distilled water (higher concentration of water molecules in the surrounding solution) >> red onion cells will become turgid >> higher diameterOsmosis refers to the movement of a solvent (usually water molecules) across semipermeable biological membranes, which occurs from a region of higher concentration to a region of lower concentration. There are three classes of solutions that have different effects on cells due to the process of osmosis:In a hypotonic solution, the cells will become turgidIn an isotonic solution, the cells will become flaccidIn a hypertonic solution, the cells will shrink (plasmolysis)When plant cells are placed into a hypertonic solution where there is a greater concentration of solute outside the cells (as in this case sucrose solution), water molecules will move from inside the cells to outside the cells, thereby cells will shrink due to water lossMoreover, when plant cells are placed into a hypotonic solution that is diluted in comparison to the content of the cell (as in this case plant cells placed in distilled water) water molecules will move from outside the cells to inside the cells, thereby cells will become turgid.Learn more about this topic here:
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Question 6 of 25
Which is an example of a vestigial structure?
A. Raccoon tail
B. Fish gills
C. Whale pelvis bone
D. Human arm
help:,)
the answer for your question is D
The diagram shows a straight chain of glucose molecules.
Which carbohydrate is shown above?
O fructose
O sucrose
O galactose
Ostarch
Answer:
Starch
Explanation:
Starch is a polysaccharide composed of many glucose molecules linearly arranged.
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Fructose, sucrose, galactose, and glucose are carbohydrates. They are organic compounds with H, C, and O. Their functional groups are hydroxyl (-OH) and carbonyl (-C=O).Galactose, fructose, and glucose are isomeric monosaccharides, with the formula C₆H₁₂O₆.
Sucrose is a disaccharide composed of glucose + fructose. The formula is C₁₂H₂₂O₁₁.
Glucose is the most abundant carbohydrate. The main source of glucose is vegetable starch.
The starch molecule is composed of many glucose molecules joined.This is a linear polysaccharide that can acquire a tridimensional helicoidal conformation. Each of the helices turns consists of six glucose molecules. In the interior of the helix, there are only hydrogen atoms. Hydroxyl groups are facing the exterior.
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