Answer:
facilitated diffusion
Explanation:
There are three types of diffusion:
1-simple diffusion: ions are moved from areas of higher
concentration to lower concentration
2-osmosis: moves water molecules
3-facilitated diffusion: ions move through the
membrane facilitated by transport/carrier proteins
How does carbon dioxide travel in blood via dissolved form
Answer:
carbon dioxide is more soluble in water than oxygen and hence is mostly transported in the dissolved form in our blood.
Carbon dioxide can be transported through the blood via three methods. It is dissolved directly in the blood, bound to plasma proteins or hemoglobin, or converted into bicarbonate.
The majority of carbon dioxide is transported as part of the bicarbonate system.
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I need help on this please and thank you!
Answer:
I think it's probably 2,3, and 4 :))
Answer:
renewable resources can be replenished.
most renewable resources are easily available in nature.
all renewable resources are cost effective.
Where are the photoreceptors located Inside a human eye?
Answer:
○They are located in the retina.
The type of cell in your eye that
detects photons and sends them to
your brain.
They are found in the retina (the back layer of the eye). Rods and cones are
the two types.
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What bacteria was the first one on the Earth?
Answer:
anaerobic heterotrophic bacteria
Explanation:
Cyanobacteria, also known as blue-green algae, started out on Earth quite a while ago. Possible fossil examples have been found in rocks that are around 3500 million years old, in Western Australia. and make me brainlist
How does variation in the environment affect natural selection?
Answer:
It effects the way that certain traits in a species evolve in an area due to being better for dealing with the environment more effectively.
Explanation:
This is legit how nature works. Please rate 5 stars.
What do mammals like tigers and zebras need energy for?
Options:
A. Running
B. Breathing
C. Digesting food
D. All of above
Answer:
d. all of the above
Explanation:
tigers and zebras both have activities that they're limited to by each species. But both of them do all that was listed, and running, breathing and digesting all take the body's energy to do.
Answer:
D
Explanation:
they both need the energy to do that
The bacterium Salmonella enterica can cause severe food poisoning and the lining of the alimentary canal may be damaged. In these cases absorption of digested food products cannot easily take place. Which region of the alimentary canal is most affected?
A colon B ileum C oesophagus D stomach
Where is the water table located?
a.10 ft below the surface
b. below the saturated zone
c. A at the top of the saturated zone
d. all of the above
Answer:
c. A at the top of the saturated zone.
how does the energy from the sun cause evaporation
Answer:
In the water cycle, evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas. ... When it is cool enough, the water vapor condenses and returns to liquid water.
Which of the following best describes the relationship between human population size and resource use?
Countries with high populations are likely to use more resources.
Countries with high populations are likely to use fewer resources.
Countries with low populations are likely to use more resources.
There is no correlation between population size and resource use.
Answer:
countries with higher populations are likely to use more resources
Explanation:
The vastness of the threats to the ecosystem is directly linked to human population size and resource uses per person. Resource use, waste production and environmental degradation are accelerated by population growth.
The relationship between human population size and resource is that Countries with high populations are likely to use more resources.
What is population size?Population size is refers to the total number of people that are living together in a place or people occupying a territory, state, town or country. The higher the population size, the higher the number of resources that will be needed and use.
Therefore, The relationship between human population size and resource is that Countries with high populations are likely to use more resources.
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g Two closely related species of plant (A and B) hybridize to form a new species (C). Species A is diploid and has 8 chromosomes. Species B is tetraploid and has 20 chromosomes. -What type of whole genome duplication is this (autopolyploidy or allopolyploidy)
Answer:
allopolyploidy
Explanation:
Polyploidy is the condition by which a cell might have more than two chromosome sets that form homologous pairs. It might occur due to a failure or abnormality in cell division.
Autopolyploidy
Refer to a type of polyploidy in which an organism has more than two copies of homologous chromosomes. It results from the duplication of a group of chromosomes of the same species. Autopolyploid individuals have at least three groups of homologous chromosomes. Autopolyploidy is produced by the gamete fusion of the same progenitor - same species-, duplicating the number of chromosomes of diploid species. The autopolyploid cell has groups of homologous chromosomes. Autopolyploidy is produced mainly due to non-disjunction during meiosis.
Allopolyploidy
Refer to another type of polyploidy in which species have more than three sets of chromosomes in their cells. Allopolyploidy occurs when two different species mate, leading to the fusion of gametes that belong to different species and produce a new hybrid. The chromosomic complement has more than two copies of chromosomes. The hybrid is infertile with the parental species. The allopolyploid cells have chromosome groups that are not homologous.
In the exposed example two different species mate and produce a hybrid species.
The carbon cycle ensures that carbon is not lost. which is another important benefit of the carbon cycle.
In an oil spill, why does the oil not mix with the seawater?
Lipids are hydrophobic.
Lipids are hydrophilic.
Lipids are saturated.
Lipids are unsaturated.
Answer:
liquids are hydrophobic
A
Answer:
a
Explanation:
Which of the following is not a limitation of the biological species concept
Answer:
to be considered a species, a population must be reproductively isolated from other species
 Why is if imporrant to find a location to build your house?
Explanation:
It's the most important factor when buying real estate. Location matters, even the location inside the neighborhood will have a large impact on your home's value. ... You want to buy on the low end of the neighborhood's price range because the other homes in your neighborhood will bring your value up
why is melting a physical change
Answer:
Because melting can be reversed ( freezing )
Explanation:
Physical change is a change that can be reversed
Ari drew a diagram to show organisms in an ecosystem.
A flowchart. Cycle 1: 1, Grass. 2, Grasshopper. 3, Shrew or Mouse. 4, Fox. Cycle 2: 1, Grass. 2, Mouse. 3, Fox or Snake. Cycle 3: 1, Grass. 2, Rabbit. 3, Fox.
What did Ari draw?
a food chain
a trophic chain
a food web
an energy web
Answer: Ari draw a food web.
Explanation:
A single ecosystem which contains all the food chains is called a food web.
In a food web each living thing present in a food web is a part of multiple food chains. Hence, food webs tend to represent the overlapping of food chains in that ecosystem.
The flow chart drawn by Ari represents that the living things present in cycle 1 are part of cycle 2 and cycle 3. Also, living things present in cycle 2 are part of cycle 1 and cycle 3.
A food chain is basically a single path where each organism is dependent of the other as a source of food without any overlapping.
Thus, we can conclude that Ari draw a food web.
Answer:
c
Explanation:
WRITE THE DEFINITIONS OF EACH ANIMAL ORGANELLE LISTED. (1) nucleolus (2) nucleus (3) ribosome (4) vesicle (5) rough endoplasmic reticulum (6) Golgi apparatus (7) cytoskeleton (8) smooth endoplasmic reticulum (9) mitochondria (10) vacuole (11) cytosol (12) lysosome (13) centriole
Answer: nucleolus: a small dense spherical structure in the nucleus of a cell during interphase. nucleus: the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass. ribosome: a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. vesicle: a small fluid-filled bladder, sac, cyst, or vacuole within the body. rough endoplasmic: reticulum (RER), series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins. Golgi apparatus: a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
Explanation:
Skeletal muscle cells essentially engage in large shape changes to pull on bones to create movement. To do this shape change, skeletal muscle cells require a lot of energy and the production of a lot of protein used inside the cell to make the structures that change the shape. Name 3 organelles that would be important in this function (one for each function).
Answer:
Explanation:
1) The mitochondrion : is an organelle that makes energy available to the cell. They use energy from organic compounds (such as glucose) to make molecules of ATP (adenosine triphosphate).
2) Ribosomes: are small structures where proteins are made. Both subunits consist of proteins and RNA. RNA from the nucleus carries the genetic code, copied from DNA, which remains in the nucleus. At the ribosome, the genetic code in RNA is used to assemble and join together amino acids to make proteins. Ribosomes can be found alone or in groups within the cytoplasm, as well as on the RER.
3) Cytoskeleton: is the “frame” of the cell, keeping structures in place, providing support, and giving the cell a definite shape.The cytoskeleton organizes the cell and keeps the cell’s organelles in place, but it also aids in the movement of organelles throughout the cell.
Please help me I beg youuuuuuu!!!
Can you please give me an environmental risk or benefit for artificial selection?
Explanation:
Risks:
may lead to a lack of variety in plant or animal species
The nutritional value of foods can be less
Benefits:
faster than natural selection
More selective breeds / Types
What is Newton’s law of universal gravitation ?
Answer:
Every body on earth attracts every other body. with a force. which is directly proportional to product of their masses and inversely proportional to square of distance between them.
Why is a shark considered a carnivore?
Obecuase it eats seaweed
O because it eats dead animals
O because it eats sand
O because it eats other animals
Answer:
sharks cannot eat animals ..... shark can eat mamals and fishes
Explanation:
Your brother recently joined the football team. He feels tired after each days practice and
is unable to continue with his homework. Is there a connection between his tiredness and
nutrition he takes? If yes, give reason, also design a healthy diet plan for him.
Answer:
from view,I will go with yes because it depends on the food he eats whether it is balanced or not. for example,if he eats only vitamin foods and carbohydrates there won't be enough energy for him go pass the day.
Yes, there is probably a link between your brother's dietary habits and his fatigue level.
Football practice can be a physically taxing and energy-intensive activity. Your brother may feel tired and struggle to maintain energy levels if he is not getting enough nutrition to support his increased energy expenditure. When creating a healthy diet plan for your sibling it is important to focus on providing adequate nutrition to support your sibling's athletic performance and recovery. Here is a dietary recommendation:
Include whole grains (such as brown rice, quinoa and whole wheat bread), fruits and vegetables in your diet to get enough carbohydrates to last you all day.Include sources of healthy fats, such as avocados, nuts, seeds and olive oil, to help supply essential fatty acids and keep you feeling full.Hydration: To maintain hydration levels, be sure to consume enough fluids before, during and after exercise.Snacks: To replenish nutrients and give you energy after exercise, eat healthy snacks, such as yogurt, mixed nuts, fresh fruit and granola bars.Encourage your sibling to prioritize nutrient-dense foods that offer a balanced balance of carbohydrates, proteins and fats, and to eat frequent meals, especially breakfast.
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What are the measures of <1 and <2 Show your work or explain your answers.
Answer:
<1=105 <2=75
Explanation:
So 2 is 75 degrees because it's corrosponding with <6.
75+<1=180
-75 -75
<1=105
Look at the map on the screen. List the region or countries the majority of African elephants inhabit.
Answer:
we need the picture
Explanation:
Discuss the nature and merits of data response questions in Life/Natural Science
Data are fundamental in Life/Natural Science because they can help us to answer hypotheses.
What is a hypothesis?A hypothesis is a given explanation about a phenomenon observed from a question from the real world.
Data obtained from experimental and observational procedures helps to reject or confirm hypotheses.In conclusion, data are fundamental in Life/Natural Science because they can help us to answer hypotheses.
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3. DNA and Protein similarities are often used for molecular evidence of evolution. What is being compared to show relatedness among species? Explain how this works.
Answer:
The sharing of common ancestors
Read each description below and determine to which stage of sleep each pertains. Then, click and drag each box into the appropriate category below.Typlcally begins about 20 minutes after stage 1 Alpha waves dominate Sleep spindies occur Light sleep Vital signs are at their lowest levels Delta waves dominate Feeing a driting sensaton Beginning of dedline in respiration and blood pressure Stage 1 Stage 2 Stage 3 Stage 4
Answer:
- Typically begins about 20 minutes after stage 1: Stage 3
- Alpha waves dominate: Stage 1
- Sleep spindles occur: Stage 2
- Light sleep: Stage 2
- Vital signs are at their lowest levels: Stage 4
- Delta waves dominate: Stage 4
- Feeling a drifting sensation: Stage 1
- Beginning of decline in respiration and blood pressure: Stage 2
Explanation:
Sleep can be divided into two phases: 1-non-rapid eye movement (NREM) sleep and 2-rapid eye movement (REM) sleep. In turn, NREM sleep is divided into four stages (1 to 4). Stages 1-2 are referred to as “light sleep”, while stages 3-4 are known as “deep sleep”. The first NREM stage (normal length: 5-10 minutes) is the transition between wakefulness and sleep. During this stage, the brain produces high amplitude theta waves. During the second NREM stage (light sleep, 10-25 minutes), the body temperature drops, muscles are in a more relaxed state, the breathing and heart rate also drop. The third NREM stage (20-40 minutes) involves the emergence of delta waves and muscles are entirely relaxed. This period (stage 3) is a period of deep sleep, which is referred to as slow-wave sleep (SWS). Finally, the fourth NREM stage (10-60 minutes) is characterized by high amplitude delta waves, while heart and respiration rates slow dramatically.
Question: Using your understanding of the 4 macromolecules explain how Earth’s early atmosphere and the 4 molecules taught could lead to the formation of life on Earth. Using your understanding of the 4 macromolecules justify the scientific theory of how life began on Earth. Include a timeline of which macromolecules formed first. Provide scientific evidence, chemical properties of the atoms found in the Earth’s early atmosphere, atoms found in the macromolecules, to support your timeline.
Answer:
Advanced forms of life existed on earth at least 3.55 billion years ago. In rocks of that age, fossilized imprints have been found of bacteria that look uncannily like cyanobacteria, the most highly evolved photosynthetic organisms present in the world today. Carbon deposits enriched in the lighter carbon-12 isotope over the heavier carbon-13 isotope-a sign of biological carbon assimilation-attest to an even older age. On the other hand, it is believed that our young planet, still in the throes of volcanic eruptions and battered by falling comets and asteroids, remained inhospitable to life for about half a billion years after its birth, together with the rest of the solar system, some 4.55 billion years ago. This leaves a window of perhaps 200-300 million years for the appearance of life on earth.
divine interventionThis duration was once considered too short for the emergence of something as complex as a living cell. Hence suggestions were made that germs of life may have come to earth from outer space with cometary dust or even, as proposed by Francis Crick of DNA double-helix fame, on a spaceship sent out by some distant civilization. No evidence in support of these proposals has yet been obtained. Meanwhile the reason for making them has largely disappeared. It is now generally agreed that if life arose spontaneously by natural processes-a necessary assumption if we wish to remain within the realm of science-it must have arisen fairly quickly, more in a matter of millennia or centuries, perhaps even less, than in millions of years. Even if life came from elsewhere, we would still have to account for its first development. Thus we might as well assume that life started on earth.
How this momentous event happened is still highly conjectural, though no longer purely speculative. The clues come from the earth, from outer space, from laboratory experiments, and, especially, from life itself. The history of life on earth is written in the cells and molecules of existing organisms. Thanks to the advances of cell biology, biochemistry and molecular biology, scientists are becoming increasingly adept at reading the text.
An important rule in this exercise is to reconstruct the earliest events in life's history without assuming they proceeded with the benefit of foresight. Every step must be accounted for in terms of antecedent and concomitant events. Each must stand on its own and cannot be viewed as a preparation for things to come. Any hint of teleology must be avoided.
The specific heat of a substance is a measure of how much energy is required to raise
the ______
one degree per one unit of mass.