Answers
Answer:
Explanation:
Active Transport- uses ATP to pump molecules AGAINST/UP the concentration gradient. Transport occurs from a low concentration of solute to high concentration of solute. Requires cellular energy.
Passive Transport- Movement of molecules DOWN the concentration gradient. It goes from high to low concentration, in order to maintain equilibrium in the cells. Does not require cellular energy.
Active and passive transport are biological processes that move oxygen, water and nutrients into cells and remove waste products. Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration. On the other hand, passive transport moves biochemicals from areas of high concentration to areas of low concentration; so it does not require energy.
There are two types of active transport: primary and secondary. In primary active transport, specialized trans-membrane proteins recognize the presence of a substance that needs to be transported and serve as pumps, powered by the chemical energy ATP, to carry the desired biochemicals across. In secondary active transport, pore-forming proteins form channels in the cell membrane and force the biochemicals across using an electromagnetic gradient. Often, this energy is gained by simultaneously moving another substance down the concentration gradient.
Related Questions
hich of the following is NOT part of the theory of evolution by natural selection?Question 6 options:The best-adapted organisms are most likely to reproduce.The traits an organism acquires in its lifetime are passed down to its offspring Genetic variations exist within a population.The best-adapted organisms are most likely to survive.
Answers
Natural selection by definition states that the fittest has more chances to reproduce and survive, this advantage is given by the genetic variation in a population (mutations), Therefore taking this into account we can see that, the traits that an organism acquires in its lifetime and passes to offspring is not part of natural selection theory (, in fact this concept is from Lamark which is very different from natural selection,
Homeostasis is key to maintaining good health, so the body has many systems that are involved in ?that provide both positive and negative feedback to support a healthy equilibrium.
Answers
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Answer:
Homeostasis regulation
Standard NCES.7.L.2.1-What is the most likely reason a parent jellyfish looks identical to its offspring?
Group of answer choices
The jellyfish reproduces through meiosis.
The jellyfish reproduces through fertilization.
The jellyfish reproduces through sexual reproduction.
The jellyfish reproduces through asexual reproduction.
Answers
Answer:
It is because the jellyfish reproduces through asexual reproduction.
How do south Floridians get our drinking water
Answers
Answer:
Instead of snowcapped mountains that store water in advance of warmer temperatures, most of our drinking water comes from underground "mountains" of porous materials called aquifers which are replenished by rain. The Biscayne Aquifer is South Florida's lower east coast's primary source of fresh water.
what are the major cell structures anfd their function
Answers
The nucleus (major organelle) holds genetic information necessary for reproduction and cell growth. Every cell has one nucleus and membrane-bound organelles in the cytoplasm. Mitochondria, a double membrane-bound organelle is mainly responsible for the energy transactions vital for the survival of the cell.vidya
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A. How do global systems interact to affect ecosystems?
B. What features of the geosphere could affect ecosystems?
Answers
Explanation:
1: A) is a purposeful unit that outcomes from interactions of abiotic, biotic, and anthropogenic components and are a combination of interacting, interrelating parts that shape a unitary whole. Ecosystems differ in size. They can be as small as a puddle, or as large as the earth itself. Basically, any dwelling and non-living matters interacting together can be considered an ecosystem. Within each ecosystem, there are habitats that differ in size. A habitat is a area the place a population lives. A populace is a group of residing organisms of the identical variety dwelling in the identical location at the same time. Natural ecosystems are made up of abiotic elements such as air, water, rocks, and power and biotic elements such as plants, animals, and microorganisms.
1: B) Faster plate tectonic movements additionally suggest more mountains are developed in areas the region plates converge. As rocks are uplifted into mountains, they start to erode and dissolve, sending sediments and vitamins into waterways and impacting the ecosystems for living things.
Mechanoreceptors in two membranous sacs of the ____________ , called utricle and saccule, detect vertical and horizontal movement, or ____________ equilibrium.
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Mechanoreceptors in two membranous sacs of the vestibule , called utricle and saccule, detect vertical and horizontal movement, or static equilibrium.
The unique sense that translates head position to allow the CNS to maintain stability and posture when the head and body are not moving; it is detected by mechanoreceptors in the vestibule of the inner ear, the utricle and saccule, each of which contain a macula with the receptors for static equilibrium; when the head moves in relation to gravity, the otolithic membrane shifts, and the mechanoreceptors (hair cells) in the macule.
Utricle and saccule are the two membranous sacs in the vestibule of the ear. Utricle is the larger sac of the two. They contain a specialized mechanoreceptors, called macule, to detect static equilibrium.
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Hi can someone please help describe this object that was viewed under high magnification
Answers
What is the difference between the greenhouse effect and the enhanced greenhouse effect? A. there is no difference between the two.B. the greenhouse effect is a natural warming process, but the enhanced greenhouse effect has a cooling effect on earth. C. the enhanced greenhouse effect has natural causes, and the greenhouse effect is due to human activity.D. the greenhouse effect has natural causes, and the enhanced greenhouse effect is due to human activity.
Answers
The greenhouse effect is a natural proccess that allows the development of life, it has natural causes. On the other hand, the enhaced greenhouse effect, also know as climate change or global warming, it's reffered to the impact on the climate caused by the overheating of the Earth's surface because of the human activity. Then, option D is correct.
Chromosomal
centromeres separate
and chromosomes pull
apart to opposite ends of
the cell
Answers
Anaphase the shortest mitosis stage. The centromeres split, and spindle fibers connected to the kinetochore regions pull the sister chromatids of each chromosome apart, or "disjoin," and transfer them to the opposing ends of the cell.
What is mitosis ?
When a single cell (the mom) divides in to the two genetically identical daughter cells, this process of cell division is known as mitosis. The phase of cell division known as mitosis, when referring to the cell cycle, is when the DNA in the cell's nucleus is split into two identical sets of chromosomes. The shortest mitosis stage is anaphase. The sister chromatids of each chromosome are pulled apart, or "disjoined," by spindle fibres linked to the kinetochore regions as the centromeres separate, and are then transferred to the opposite ends of the cell.
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Chief material present in the cell wall of plant, fungal and
prokaryotic cell is
Answers
Answer:
In the plant cells, cellulose is the primary component of the cell wall, in bacteria the primary component of the cell wall is peptidoglycan and in fungi the primary component of the cell wall is chitin.
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Consider two planets that have the same mass but are very different in size. Which statement describes gravitational pull that an object would experience on the surface on each planet
Answers
Answer:
Suggest what information the sugeon General would have needed to obtain in order to make a valid and reliable conclusion about the link between cigarrete smoking and lung cancer
Cellular Respiration and Energy
Which of the following statements about facilitated diffusion is Gated proteins control the rate of diffusion.
Molecules move up the concentration gradient
ATP is required to move molecules through the protein channels.
Molecules move from an area of low to high concentration.
Answers
The three phosphate groups of the ATP molecule have negative charges that are given by the oxygen atoms they possess. Because the negative charges repel each other it is extremely difficult to keep the phosphate groups together and therefore the bonds that exist between them are very strong, for this reason when a phosphate bond is broken to convert ATP to ADP, a large amount of energy is released. This is why ATP works so well as an energy molecule. Therefore, the answer is A (they have the same charge and repel each other)
1.Are Algae classified as plants or animals or both? Justify your answer
Answers
Algae are a non-monophyletic group, that is that it doesn't share a common ancestor, but share the characteristics of being able to photosynthetize, and the abscense of true vegetative tissues. They are more related to plants than animals, sharing the same type of nutrition (autotrophy) thanks to the acquisition of the chloroplast, which allows them to do photosynthesis. Actually, plants evolved from a group of Algae called Chlorophyta.
So, the correct classification of this organisms isn't neither as plants nor animals.
Explain the differences between weather and climate. Give 2 examples of each.
Answers
Answer:
Weather is a short-lived and random changes in the atmosphere, from rain to snow to hot summer months. While, Climate is usually a set temperature for a long period of time. Some examples of a climate are Antarctica, usually being cold and snowing all the time, even in summer months.
As children become adolescents, according to Kohlberg, most of them remain fixed at what level of moral development?
Question 2 options:
Conventional
Interconventional
Preconventional
Postconventional
Answers
Answer: A. Conventional should be the correct answer.
Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. which system carries cytokinins produced in the roots to the rest of the plant?F Vascular systemG Dermal systemH Reproductive systemJ None of thes
Answers
As we know the plants constantly are distributing nutrients, hormones, proteins, and waste compounds along with the whole plant, just like animals plants possess a circulatory system, named the vascular system. So we can say that the correct answer is option F.
As children become adolescents, according to Kohlberg, most of them remain fixed at what level of moral development?
Question 2 options:
Conventional
Interconventional
Preconventional
Postconventional
Answers
Answer: A. Conventional
Improve the student’s model of gas exchange by drawing the missing component.
Answers
The organs where gas exchange takes place are the element missing from the diagram. All regions of the body receive oxygenated blood from the lungs through the red blood cells.
What is the gas exchange process?The circulation receives oxygen from the lungs during gas exchange. The blood and lungs exchange carbon dioxide at the same time. This occurs in the lungs between the capillaries, which are a network of microscopic blood arteries found in the walls of the alveoli, and the alveoli themselves.
Briefing:The diagram can be improved by:
Lungs
↓
oxygen
↓
Red blood cells (carrying oxygen)
↓
Organs where carbon is removed from and oxygen is provided,
like as the stomach and liver
↓
Carbon dioxide is transported to the lungs by RBCs.
The organs where gas exchange takes place are the element missing from the diagram. All regions of the body receive oxygenated blood from the lungs through the red blood cells, which also transport waste carbon dioxide gas back to the lungs. The lungs then exhale the carbon dioxide.
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Approximately how many moons are there in the solar system that are large
than Pluto?
Answer here
Answers
Answer: There are seven moons in our Solar System, including our own Moon, that are larger than Pluto.
Explanation:
Trust
Based on the below experiment What is the purpose of the liquid detergent?
Answers
Answer:
Liquid detergent can be used to isolate DNA, that is because most of the commercial washing powders contain a mixture of detergents, enzymes and chelating complexes (e.g. EDTA) and this is what is needed to quickly isolate high molecular weight DNA.
Choose a plant tissue. Write an explanation of how that tissue’s structure relates to its function. Be specific and detailed
Answers
Answer:
The vascular tissues, xylem, and phloem are arranged in the vascular bundle and serve to regulate and circulate the nutrients. Xylem transports water, while phloem transports nutrients and organic compounds.
Answer:One plant tissue that is critical to the survival of the plant is the xylem tissue. Xylem tissue is responsible for transporting water and minerals from the roots of the plant to the rest of the plant, including the leaves and stem. The structure of the xylem tissue is specifically designed to perform this function efficiently and effectively.
Xylem tissue is made up of two main types of cells: tracheids and vessel elements. These cells are long and cylindrical, with a hollow center that allows for the easy flow of water and minerals. Tracheids are thin-walled cells that have tapered ends, and they are found in all vascular plants. Vessel elements are larger in diameter than tracheids and have thinner walls. They are found only in angiosperms (flowering plants) and gymnosperms (non-flowering plants).
The walls of tracheids and vessel elements contain lignin, a hard and durable material that provides structural support to the plant. The presence of lignin allows the cells to withstand the high pressure that is created when water is transported through them. The walls of the cells are also impermeable, meaning that they do not allow water to escape, which is crucial for the efficient transport of water and minerals throughout the plant.
In addition to tracheids and vessel elements, xylem tissue also contains parenchyma and sclerenchyma cells. Parenchyma cells are thin-walled cells that provide support and store nutrients. Sclerenchyma cells are thicker-walled cells that provide structural support and protection to the plant.
The structure of xylem tissue allows it to perform its function of water and mineral transport efficiently. The hollow center of the tracheids and vessel elements allows for the easy flow of water and minerals, while the presence of lignin in the cell walls provides support and prevents the cells from collapsing under pressure. The impermeable walls of the cells ensure that water and minerals are not lost during transport, and the parenchyma and sclerenchyma cells provide additional support and protection to the plant. Overall, the structure of xylem tissue is crucial to the survival of the plant, as it ensures the efficient and effective transport of water and minerals throughout the plant.
Explanation:
In Pavlov’s experiments, what was an example of an unconditioned response?
Question 4 options:
The ringing of the bell when the food was offered.
The dog’s salivation when the bell was rung.
The food the dog was offered.
The dog’s salivation without stimulus.
Answers
In Pavlov's experiment, he showed that the dog's salivation can be conditioned with the sound of the ringing of the bell. Thus, the correct option is B.
What is Pavlov's experiment?
Pavlov showed in his experiment that dogs could be conditioned to salivate at the sound of a ringing bell if that ringing sound was repeatedly presented at the same time as that when they were given the food. First the dogs were presented with the food, they salivated. The food was the unconditioned stimulus in this experiment and salivation was an innate response.
In the classical conditioning experiment, an unconditioned response is an unlearned response that occurs innately in reaction to the unconditioned stimulus with a condition.
Therefore, the correct option is B.
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Which of the following are examples that the particles of matter are in motion?
a. You can smell the turkey dinner far from the kitchen where it is being cooked.
b. Adding a pinch of red cayenne pepper powder to white milk turns the milk pinkish.
c. Dissolving sugar in water makes the water sweet.
D. All of the above
e. None of the above
Answers
Answer:
Explanation:
Short Answer D
If you see any change at all, you know something is moving where it was not moving before.
The smell of turkey (or perfume) can only happen if atoms are moving from the kitchen to your nose. There is no other transport mechanism.
A change of color is most often associated with chemical reactions, but it need not be that alone. The molecules can just be moving around and lend their color to (in this case) white milk.
Well this one is a little tough. You can't see anything happening if you put (say) a 1/2 teaspoon of sugar in an 8 oz cup. But you know something has happened to the water when you taste it. Taste is one of our senses and when we detect something like sweetness we know that something sweet has been add to what we drink. Only molecular motion can account for that.
Define deforestation What are some negative and positive effects ( if any ) of deforestation
Answers
Deforestation can be defined as the loss of forests due to the impact of human activities or natural causes.
Some of the negative consequences of deforestation are the loss of the habitat of native species in the area that was deforested, this puts the lives of these species at risk.
Another consequence is that deforestation promotes global warming, since forests and jungles help to consume a considerable part of atmospheric CO2, reducing environmental pollution and therefore, the amount of greenhouse gases, also decreasing environmental temperature.
Regarding the positive effects of deforestation, these would be mostly economic, since the wood of the trees works as a raw material for many materials that are currently used. While environmentally the advantages are scarce. An example could be the logging of invasive species in an ecosystem (if they exist). However, deforestation is normally carried out indiscriminately, so it would also affect native species
What is causing the temperature of the earth to increase what is it called?
Answers
Answer:
Climate change/Gobal warming.
-Why does it occur?
It is due to increase in usage of substances that cause damage to ozone layer and earth!
These substances which cause global warming are known as green house gases and they include Carbon dioxide (CO2) and air pollutants.
These gases cause rise in temperature and cause climate change!
Also , due to rise in temperature, the icebergs and north pole areas get melted and sea level rises and causes disturbances.
Measures to prevent Climate Change:-
1)We must start afforestation and stop deforestation
2)We must use resources which don’t pollute the atmosphere
3) We must use vehicles which are run on CNG and LPG
4) We must not burn fossil fuels instead we must convert to renewable resources.
Explain why meiosis might be considered a special case of mitosis.
Answers
Cells reproduce through both meiosis and mitosis, yet they differ significantly from one another.
What is the role of meiosis in organism?While mitosis produces new cells, meiosis is a unique sort of cell division that creates sex cells for reproduction. Researchers from several fields independently discovered the two processes.
The original nucleus divides into two identical nuclei during mitosis. Contrarily, meiosis produces four nuclei, each of which contains half as many chromosomes as the parent cell.
Only the gametes, or cells that develop into sex, the egg, and the sperm, go through meiosis in animals.
Therefore, meiosis might be considered a special case of mitosis.
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In Pavlov’s experiments, what was an example of an unconditioned response?
Question 4 options:
The ringing of the bell when the food was offered.
The dog’s salivation when the bell was rung.
The food the dog was offered.
The dog’s salivation without stimulus.
Answers
Answer:
The dog’s salivation without stimulus.
Explanation:
Unconditioned Response is a natural response towards the stimulus, with no learned influence.
In this case, it will be the the dog's salivation without stimulus.
Why it isn't 1: The ringing of the bell is the Conditioned Stimulus, as it is used to condition the dog that "food is served" when the bell is rung.
Why it isn't 2: The dog's salivation is the result of long-term stimulus, and so it is the Conditioned Response, where the connection between the bell and food being served is already made.
Why it isn't 3: The food is the Unconditioned Stimulus.
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Bonobos are distinct from chimpanzees in what way(s)?
O Regularly walk on two legs with ease.
O Alpha females and their sons rule the group.
O They use sex as a way to diffuse aggression and tension within the group.
O All of the above.
Answers
Bonobos are distinct from chimpanzees in what way they regularly walk on two legs with ease, alpha females and their sons rule the group.and use sex as a way to diffuse aggression and tension within the group (all options are correct).
What are Bonobos?Bonobos are a group of primates that have certain behavioral characteristics which may be associated with humans and other primates species. This species (Bonobos) is well known to have certain reproductive strategies that might make more efficient natural selection under certain conditions.
Bonobos are animals that share certain features with humans which include bipedalism and certain reproductive features in order to increase the reproductive fitness of the species in the environment in which they develop.
Therefore, we can conclude that Bonobos are primates that regularly walk on two legs like humans and share certain reproductive strategies.
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State the composition of the chromatography solvent used; is this solvent predominantly polar or non polar?
Answers
In the composition of the chromatography solvent used for mixes of chemicals with drastically differing polarities, a polar gradient is used.
Solvents: Hexane is a typical non-polar solvent for thin-layer and chromatography. There are numerous polar solvents that it can be utilized with.
As opposed to separate continuous phases like those found in suspensions, emulsions, and other non-solution mixtures, a solvent-solute mixture consists of a single phase with all solute molecules occurring as solvates (solvent-solute complexes).
There are three parts to the setup. A solution that rises the stationary phase as a result of capillary action is known as the mobile phase. The stationary phase typically consists of polar inorganic solvent water, while the mobile phase typically consists of a combination of non-polar organic solvents.
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