Answer:
There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
Explanation:
The cell use energy when molecules diffuse as there are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
What is diffusion?Diffusion has been defined as the process of passive transport in which a single substance would moves from an area of high concentration to an area of low concentration until the concentration has been equal on both areas.
Diffusion distance rate of diffusion depends on the distance molecules have to travel. The greater the diffusion distance needs to travel the longer it takes to move.The greater the distance that a substance must travel, the slower the rate of diffusion. Oxygen moves from the alveolus to the capillary through the respiratory membrane which means the thickness of the respiratory membrane is diffusion distance.
Therefore, The cell use energy when molecules diffuse as there are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
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Fossil fuel dependence is associated with _______.
Answer:
release of enormous amounts of greenhouse gases
Explanation:
Answer:
Environmental consequences, economic consequences, and development hindrances
Explanation:
Hope this helps!!!
I need help please and thank you
Answer:
Vacuoles
Explanation:
Vacuoles are the primary organelles for storing various substances in plant cells. These materials include water, ion, sugar, cellular compounds and more.
This is a tulip plant.
Which statement best describes the flower based on its physical characteristics?
Options are not provided in teh question. The complete question is as following:
This is a tulip plant. which statement best describes the flower based on its physical characteristics?
a. the tulip plant is classified as a dicot.
b. the tulip plant has netted veins.
c. the tulip plant has ring-like vascular bundles.
d. the tulip plant is categorized as a monocot.
Answer:
d. the tulip plant is categorized as a monocot.
Explanation:
Monocots are the plants which bears' flowers with the seeds containing just a single embryonic leaf or cotyledon.
Tulips have the flower parts or seed leaves are in multiples of threes and have parallel veins. A tulip is a Monocot due to its characteristics of bearing seeds with ony one cotyledon.
Hence, the correct option is d.
HELP ME PLSSSS 14 points..
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what is the function of Mitochondrion?
Answer:
The main function of mitochondria is to perform cellular respiration. This means it takes in nutrients from the cell, breaks it down, and turns it into energy.
How could the situation in Haiti be improved?
Answer:
Billions of dollars of foreign aid has poured into Haiti with little to show for it. This is largely because that money has come to do for Haitians what, with a little help in expertise, they could have done for themselves. This is the biggest difference between aid and development. As a result, 74% of Haitians are either unemployed or under-employed and 8.5 million live on less than $2.41 per day.
Aid is designed to help with immediate needs. As important as that is at times, aid is not the solution to Haiti’s long term challenges. The Haitian people are the solution to Haiti’s problems, particularly those who have the skills and character to build a stronger Haiti for all.
By helping men and women gain the skills to build, train, and lead, you have the power to unleash Haiti’s potential to create a stronger future. Through Extollo’s unique approach to development you will help build stronger careers, stronger families, stronger communities, and a stronger infrastructure for all Haitians.
Explanation:
Answer:
The situation in Haiti could be improved by screening UN workers for illness, increasing water sanitation, and providing adequate sewage treatment.
Explanation:
right on edge
A solar powered car converts _______________ energy into _________________ energy. A) light, chemical B) light, mechanical C) mechanical, light D) electrical, mechanica
Answer: B) Light to Mechanical Energy
Explanation:
Final answer:
A solar powered car converts light energy into mechanical energy by using photovoltaic cells to transform solar energy into electrical energy, which then powers an electric motor.
Explanation:
A solar powered car converts light energy into mechanical energy. In a photovoltaic cell, which is a component of solar panels, the energy transformation that takes place is that solar energy transforms into electrical energy. This electrical energy is then used to power an electric motor which provides the mechanical energy to drive the car. Thus, the correct answer to the student's question is B) light, mechanical.
Explain how prokaryotes that live in the human body can be beneficial
Answer: They ward off disease-causing organisms by competing for space and nutrients on and inside the body. They train our immune system so it's ready when our bodies are attacked, and they aid in digestion and supply us with vitamins. Scientists and doctors can even utilize prokaryotes to help the human body.
What type of bone marking enables these bones to fit together to form a joint
(URGENT, IM IN A HURRY), (PLZ ANSWER ASAP)
Match the terrestrial biomes:
1 .
rain forest
evergreen forest of high latitude
2 .
taiga
treeless, lichens, caribou
3 .
desert
humid dense forest, numerous animals
4 .
tundra
plains, mostly small animals , prairies
5 .
grasslands
dry, little vegetation
Answer:
1. Rain forest
humid dense forest, numerous animals
2. Tagia
evergreen forest of high latitude
3. Desert
dry, little vegetation
4 Tundra
treeless, lichens, caribou
5 Grassland
plains, mostly small animals , prairies
Hope this helps~!!!
Terrestrial biomes include Rain forest: humid dense forest, numerous animals, Taiga: evergreen forest of high latitude, Desert: dry, little vegetation, Tundra: treeless, lichens, caribou, Grassland: plains, mostly small animals , prairies.
What are terrestrial biomes?Terrestrial biomes are the ecosystems which are found in a similar climatic pattern in a region that need not to be located in close proximity however the span across the earth. An example of a terrestrial ecosystem is a tropical forest. The various types of biomes in the terrestrial terrain are the forests, grasslands, deserts, and tundra.
Examples of terrestrial biomes are: Rain forest: humid dense forest, numerous animals, Taiga: Evergreen forest of high latitude, Desert: dry, little vegetation, Tundra: treeless, lichens, caribou, Grassland: plains, mostly small animals , prairies.
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Which of these qualities is an advantage of LED lightbulbs?
O
O
A. They are harder to dispose of than traditional lightbulbs.
B. They last much longer than traditional lightbulbs
C.
They are more expensive to buy than traditional lightbulbs.
O
D. They use more energy than traditional lightbulbs.
Answer:
B. They last much longer than traditional lightbulbs
The important quality which is an advantage of LED lightbulbs over normal lightbulbs is they last much longer than traditional lightbulbs. Thus, the correct option is B.
What are LED Lightbulbs?
An LED lamp or the LED light bulb is an electric light which produces light using the light-emitting diodes. LED stands for Light Emitting Diode. LED lamps are significantly much more energy-efficient than the equivalent incandescent traditional lamps and these can be significantly more efficient than that of most of the fluorescent lamps.
LED lightbulb products produce light up to 90% more efficiently than the incandescent light bulbs. An electrical current passes through a microchip which is responsible for the illumination of the tiny light sources which we call LEDs and the result is the visible light.
LED lightbulbs have longer life as compared to the incandescent lamps. LED lightbulbs require low operational voltage and also less power as compared to that of incandescent lamps. LEDs also have a fast on-off switching capability.
Therefore, the correct option is B.
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Which of the following organisms undergo both photosynthesis and cellular respiration? Select all that apply. * 1 point Dogs trees grass flowers humans
Final answer:
Plants, grasses, and flowers undergo both photosynthesis and cellular respiration, while dogs and humans rely on consuming organisms that have undergone photosynthesis for their energy needs.
Explanation:
Plants, grasses and flowers undergo both photosynthesis and cellular respiration. Animals like dogs and humans do not perform photosynthesis but rely on consuming plants or other organisms that have undergone photosynthesis for their energy needs.
After the Krebs cycle only a small portion of the energy of gluecose has been converted to atp. At this point the majority of usable energy contained in
Cellular respiration is a three-part process including glycolysis, the Krebs cycle, and electron transport chain, designed to extract energy from glucose. Only a small portion of the energy is converted to ATP after the Krebs cycle. Most of the energy is still carried by high-energy electrons sent to the electron transport chain.
Explanation:The process you're asking about is called cellular respiration and is used to extract usable energy from glucose. It is a three-part process involving glycolysis, the Krebs cycle, and the electron transport chain.
Glycolysis, which occurs in the cytoplasm of the cell, is the first stage. In this process, glucose is split into two three-carbon sugars, with the investment and subsequent production of 2 ATP per glucose molecule. Next, the Krebs cycle (or Citric Acid Cycle) takes place in the mitochondria and produces a small amount of ATP, but its main purpose is to provide high-energy electrons used in the next stage.
The electron transport chain is where most of the energy is produced. The high-energy electrons provided by the Krebs cycle are used to create a large amount of ATP as they are transported along a series of proteins. This whole process only extracts about 34 percent of the energy contained in glucose, with the rest being released as heat.
Therefore, it is correct that only a small portion of the energy of glucose has been converted to ATP after the Krebs cycle. Most of the energy is still in high-energy electrons passed on to the electron transport chain.
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An energy pyramid shows the amount of
available at each feeding level in an ecosystem.
US
301
Answer:
Yes
Explanation:
An energy pyramid shows the amount of available at each feeding level in an ecosystem. This energy pyramid shows the amount of energy available at each tropic level showing the food energy progression. The pyramids contain energy starting with the producers (plants) at the bottom to primary consumers, tertiary consumers and so on up to the top of the food chain. The most common units are grams per square meter per year or calories per square meter per year.
How many people are born with Leigh syndrome
Answer:
. Leigh is rare and is 1 in 30,000 to 1 in 40,000 people at birth. Mitochondrial DNA-associated Leigh syndrome, which is more rare than nuclear gene-encoded Leigh syndrome, is likely to occur in about 1 in 100,000 to 1 in 140,000 births.
Explanation:
Choose two ways that carbon (usually in the form of CO2) enters the atmosphere. *
1 point
Captionless Image
Feeding
Respiration
Decay
Fossil Fuel Formation
Auto and factory emmisions
Photosynthesis
Answer:
respiration
fossil fuel formation
Explanation:
remains of plants and animals results to fossil fuel formation when these fuel burnt they release CO2 in the atmosphere
respiration of living things release CO2 in the atmosphere
5. Describe: How did Earth's oceans form?
The earth began as a cloud of dust and hot, shining gas. When our planet began to cool, its surface solidified, surrounded by clouds of water vapour. When this vapour condensed (changed into liquid) and began to fall like rain, seas, and oceans formed in the hollows of the Earth’s surface. Oceans are huge expanses of water which separate the Earth’s continents. The largest ocean is the Pacific Ocean, second, the Atlantic and third largest, the Indian Ocean. Seas are smaller expanses of water, almost always flowing either into oceans or other sea. The waters of the seas and the oceans are always salty, because they are rich in mineral salts and especially sodium chloride, which is the salt used in cooking.
Answer:
the ocean formed from the escape of water vapor and other gases from the molten rocks.
Explanation:
After the earth's surface had cooled to a temperature below the boiling point of water , rain began to fall - and continued to fall for centuries . Hope this helped .
When a cell placed in a hypotonic water molecules will tend to... *
remain evenly distributed
move into the call
move out of the cell
move against the concentration gradient
Around a pond, there is a small population of turtles. Some of them have solid dark brown shells and some of them have yellow and brown shells with yellow spots. Spotted shells are dominant over solid shells. Six of the turtles are homozygous for the spotted shells, four are heterozygous and two are homozygous for the solid shells.
1. How many total alleles are there in this particular gene pool?
2. How many dominant alleles are there? Recessive?
3. Calculate the allele frequency for the dominant and the recessive allele.
4. If over time, due to a change in the environment, the solid dark brown shells became the advantageous color, what would likely happen to the frequencies of the gene pool?
5. If the allele frequency of a particular trait is 100 percent, describe the genetic variation for that trait in the population.
Answer:
1. 2 alleles, solid brown and spotted
2. 1 dominant, spotted, and one recessive, solid
3. Dominant: 16/24 Recessive: 8/24. Spotted- R, solid, r. There are 6 RR, 4 Rr and 2 rr.
4. It would slowly become more common and common. When a spotted and a solid pairs, its still most likely that the offspring will be spotted, however as most spotted die the number of spotted getting offsprings decrease.
5. No genetic variation, everyone in the population has that trait
A large power plant burns coal to generate electricity for nearby homes and businesses. This contributes most directly to which short-term human-induced environmental change?
Answer:
global warming
Explanation:
Answer:
global warming
Explanation:
I think this is right. Hope this helps.
Swedish scientist Carl Linnaeus is known for creating the first version of the modern taxonomy system in the 1700s. Which of the following is NOT a classification in the Linnaean system of naming?A:Genus B:Species C:Class D:Prokaryote
Answer:
D. Prokaryote
Explanation:
The Linnaean system of naming consists of domain, kingdom, phylum, class, order, family, genus, and species. I remember it with "D- King Phillip Came Over For Great Soup".
I hope this helps!
Final answer:
The classification 'Prokaryote' is NOT part of the Linnaean system of naming; Carl Linnaeus's system includes Genus, Species, and Class among other ranks.
Explanation:
Swedish scientist Carl Linnaeus is renowned for creating the first comprehensive taxonomy system in the 1700s, which is crucial for the science of taxonomy, the classification and naming of organisms. The Linnaean system includes a hierarchical structure with several levels of classification, including Kingdom, Phylum, Class, Order, Family, Genus, and Species. Notably, Linnaeus is responsible for introducing binomial nomenclature, where each species is given a two-word name, with the first word indicating the genus and the second the species itself.
The correct answer to the student's question is D: Prokaryote. This term refers to a broad grouping of organisms that do not have a nucleus, which falls outside the hierarchical ranks established by Linnaeus. Instead, the classifications within the Linnaean system are Genus, Species, and Class, making Prokaryote the classification not part of the Linnaean system of naming.
Which statement best describes the relationship between changes in air pressure and wind speeds?
When a high- and a low-pressure air mass are far apart, air moves quickly from low to high pressure.
When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure.
When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure.
When a high- and a low-pressure air mass are close together, air moves slowly from high to low pressure.
The statement that best describes the changes in air pressure and wind speed is related to the high pressure and low pressure that is different in the winds.
The region with low pressure will always get winds from the high pressure. This means that the region of low will attract winds from the high pressure and vice versa.This is due to the temperature and pressure difference.
Thus the option C is correct.
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Answer: C
Explanation: Took the tes
What is a hormone?
A. The edge of a neutron
B. A type of amino acids
C. A chemical sent from a gland
b. A type of neurotransmitter
Answer: C? i think it is C but not entirely sure
Explanation:
A hormone is a chemical sent from a gland that regulates various functions in the body.
Explanation:A hormone is a chemical sent from a gland that regulates various functions in the body. It acts as a messenger and helps to coordinate different processes such as growth, development, metabolism, and reproduction. For example, insulin is a hormone produced by the pancreas that helps regulate blood sugar levels.
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If a sample of DNA contains 25% adenine, what percent Thiamine would it contain
Answer:
25%
Explanation:
adenine and thymine are base pairs so there will be an equal amount of adenine to thymine.
3. Is it possible for a mom who can see color and is a heterozygous carrier for
colorblindness (XRXr) and a normal-vision dad (XRY) to have a colorblind
daughter? Explain and show your understanding. Colorblindness is an
X-linked recessive trait.
HELP!! URGENT!!
Using what you have learned about the many models developed to describe an atom, infer why the model had to change as new information came to light? Defend why this is true or false of all scientific models and theories.
Answer:
True, the model had to change as new information came to light.
After the invention of new instruments, it enable us to do more research and verify old theories.
Dalton atomic theory states that matter is composed of very small particles called atoms which is indivisible. Indivisible means cannot be broken down into simpler substances. But Rutherford performed an experiment and concluded that atom is divisible into proton, electron and neutron. Electron is present in the shell while proton and neutron are present inside the nucleus of an atom.
Which of the following happens at mid-ocean ridges and is essential for the process of plate tectonics being able to continue?
A). Old rock is melted into magma.
B). New rock is formed from magma.
C). Seamounts are shaped.
D). Trenches are destroyed.
At mid-ocean ridges, new rock is formed from magma, which is essential for plate tectonics to continue.
Explanation:Mid-ocean ridges play a vital role in the dynamic process of plate tectonics. These underwater mountain ranges are located at divergent boundaries, where tectonic plates are moving apart from each other. At these locations, new rock is formed through a process involving magma.
Magma, which is molten rock beneath the Earth's surface, rises up from the mantle to fill the gap created by the separating tectonic plates. As the magma approaches the ocean floor, it encounters lower pressure, causing it to melt and form new rock. This process is known as decompression melting. The newly formed rock solidifies upon contact with the cold seawater, creating fresh oceanic crust.
Over time, this continuous cycle of magma rising, solidifying, and forming new rock contributes to the expansion of the seafloor. As new crust is generated at mid-ocean ridges, it pushes the existing oceanic crust away from the ridge in both directions, driving the movement of tectonic plates and influencing the shape and size of Earth's continents.
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1. If Mike drove for nine hours at a speed of 105km/h, how far did he drive in meters (m)?
2. Ann jogged 5.5 miles south to her house in 0.9 hours. What is Ann's speed? What is Ann's velocity?
3. How long will it take a car to accelerate from 18.9 m/s to33.7 m/s if the car has an acceleration of 4.2m/s2?
Answer:
1) 945000 m
2) 6.11 miles/hour
3) 3.52 seconds
Explanation:
1. Speed is the time rate of change of distance, it is the ratio of distance to time. Speed is given by the equation:
[tex]speed(S)=\frac{distance(d)}{time(t)}[/tex]
Given that:
Time (t) = 9 hours and Speed (S) = 105 km/h
[tex]S=\frac{d}{t}\\ d=S*t=105*9=945km=945000m[/tex]
2) Time (t) = 0.9 hours and distance (d) = 5.5 miles
[tex]S=\frac{d}{t}\\ S=\frac{5.5}{0.9} =6.11miles/hour[/tex]
3) Acceleration it is the ratio of velocity to time. Acceleration is given by the equation:
[tex]Accceleration(a)=\frac{Final,velocity(u)-initial, velocity(v)}{time(t)}[/tex]
Given that :
a = 4.2 m/s² , u = 18.9 m/s and v = 33.7 m/s
[tex]a=\frac{v-u}{t}\\ t=\frac{v-u}{a}\\ t=\frac{33.7-18.9}{4.2}=3.52s[/tex]
Answer:
1) 945.000 meters
2) 9,84 kilometers/hour
3) 3,52 seconds
Explanation:
1) 105 km/h x 9 h = 945km
1km = 1000 meters 945 km = 945.000 meters
2) 1 mile = 1.61 km
5.5 miles x 1.61 km / 1 mile = 8,855 km
You have to do a single third rule to clear the x which is the Ann's velocity in 1 hour.
8,855km in 0.9 hs
x (velocity in 1 hour) = 9,84 km = 1 hs
1 hs x 8,855km / 0,9hs = 9,84km/h
v= 9,84km/h
3) you have to use this formula and clear T (time)
vf = v0 + a.t
vf-v0 = a.t
(vf - v0)/a = t
(33.7 m/s - 18.9 m/s) / 4.2 m/s2 = 3,52 seconds
the muscles that start shivering represent which
part of the control system?
Answer:
The thermostatic control center in the hypothalamus.
Explanation:
In the hypothalamus, a control area presents which controls the temperature of the body. Primary motor center for shivering present in the posterior hypothalamus which is continuously inhibited by heat signals which come from the heart center present in the anterior hypothalamus. But when the body felt cold than from the skin and spinal code signals generated and excite the shivering area. The body starts shivering which involves muscles of the body.
Answer:
Primary motor center is a system which is responsible for shivering of muscles.
Explanation:
Primary motor center is an area which is responsible for the movement of muscles by producing impulses. Shivering is also the movement of muscles which occurs when the body feels cold. This shivering occurs for the production of heat in the body and soon the body gets warm.
How can resource availability affect interactions between organisms?
QUICK
Answer:
Alterations in resource availability can increase or decrease the intensity of interactions between organisms. This may also cause evolutionary changes to life history traits.
Explanation: