Answer:
?
Explanation:
(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps determine the most likely mode of transport.
Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport.
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There are three main different types of transport across the membrane
Simple diffusion ⇒ Does not need energy to occurFacilitated transport ⇒ Does not need energy to occurActive transport ⇒ Needs energy to occurActive transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.
Molecules move from the lower concentration side to the higher concentration side of the membrane.
Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.
In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.
The cells maintain a 120 mM intracellular concentration of substance L. Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).Table 1. Rate of entry of substance L into mammalian cells in culture
External concentration of substance(mM) Rate of entry of substance L
10 5%
20 25%
30 45%
40 65%
50 80%
60 90%
70 95%
80 100%
90 100%
100 100%
Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.
We know that the intracellular concentration is 120mM.
As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.
As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.
Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.
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Describe the structures and functions of each of the four groups of macromolecules. (Carbohydrates, Lipids, Nucleic Acids, Proteins)
Answer:
Nucleic acids: Stores and transfers info.
Carbohydrates; Store energy, provide fuel, and build structure in body, main source of energy, structure of plant cell wall.
Lipid: Insulator and stores fat and energy.
Protein: Provide structural support,transport, enzymes, movement, defense.
List two characteristics of Coelenterata and Nematoda each.
Answer:
What are the two characteristics of Coelenterata?
Characteristics. All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
What are the two characteristics of Nematoda?
Their body is bilaterally symmetrical and triploblastic. They are cylindrical in shape. They exhibit tissue level organization. Their body has a cavity or pseudocoelom.
Explanation:
Describe the main structures involved in photosynthesis.
Answer:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
Explanation:
Unicellular organisms have different structures from each other.Explain why.
Answer:
The reason why is because in the process of reproduction; there are some mistakes in DNA replication (out of billions of base pairs about 120,000 mistakes). This is what brings us so much variation in organisms.
Match the description with the correct term
The large storage sites of the different forms of carbon are referred to as Carbon ______?
WILL MARK BRAINLIEST
Which of the following BEST describes the length of days in Australia when the Earth and sun are positioned as shown in January in the diagram above?
long days.
continual daylight.
short days.
continual darkness.
Answer:
B is the answer
Explanation:
continual daylight
In the given image it is showing long days. The correct option is A.
What is the relation between day and night?The Earth orbits the sun once every 365 days and rotates once every 24 hours on its axis.
Day and night are caused by the Earth rotating on its axis rather than by its orbit around the sun.
The term "one day" refers to the time it takes the Earth to rotate once on its axis and includes both day and night time.
A day is roughly the time it takes for the Earth to rotate or for other large astronomical objects to rotate.
The number of daylight hours we have depends on our latitude and how the Earth orbits the sun.
The axis of rotation of the Earth is tilted relative to its orbital plane and always points in the same direction means toward the North Star.
Thus, the correct option is A.
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easy - one giving brainly if correct AND DETAILED!
please give me at least 2.
Well you see theres this guy named MrBeast thats taking little kids money and is having one of his slaves eat a water bottle for every dollar
Answer:
Well recently Team Seas has come out for every dollar donated I think it's 1 pound of trash so by donating would be one.
The second would be volunteering to help clean up for example a beach.
For more lasting impact would be to have a machine that collects the trash at where the rivers and streams meet the ocean this will lead to less trash in the ocean. There is a great example of this machine by Mark Rober gives a detailed explanation.
how does oxygen have a direct effect on sea urchins
Answer:
When the oxygen level is low in a Purple Sea Urchin, muscles associated with Aristotle's Lantern pump fluid through its body (through the canals). Carbon dioxide (waste/not good stuff) is released through the anus. The Purple Sea Urchin obtains oxygen through diffusion only (the diffusion of oxygen into the organism).
Explanation:
Brainliest please
Sea urchins breathe through their feet tubes because of nonavailability of lungs and gills in them. When the oxygen level is low at that time, the sea urchins pump fluids through their anus.
How are sea urchins able to survive sea ?Sea urchins are able to survive in sea because of the tiny hair called spines present on their body as water currents are created because of the hair and waste gets washed away with the water currents created.
When the carbon dioxide level gets increased in the sea at that time the skeletal structures of the marine animals are also affected.
The shells made up of calcium also gets affected because of the increasing acidity in the water. Carbon dioxide not so good is released through the anus and this totally affects the normal regulation of the creature.
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What will happen to a population of organisms that are in an oxygen rich environment. (Double click the story board to draw on it)
Answer:
it will disolve
Explanation:
please help me nowwwwwwwwww it is not D
Which of the following best describes sickle-cell anemia?
A) Caused by environmental factors that an individual was exposed to during pregnancy.
B) A hereditary genetic mutation that causes a resistance to malaria.
C) An inherited disorder that increases the risk of contracting malaria from mosquitos.
D) A genetic mutation that is inherited from a dominant allele of one parent.
Answer:
A.
Explanation:
This is when a female reproduces alone
Answer:
Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body. Normally, the flexible, round red blood cells move easily through blood vessels.
Explanation:
Based on "Sickle cell anemia is an inherited red blood cell disorder" taken from the text, I would say the correct answer is C, because it says "an inherited disorder" and describes Sickle cell anemia.
Hope this helps! :D
1. The 1930s Dust Bowl in the Great Plains was caused by (1 point)
(O pts) deforestation.
0 (0 pts) contour plowing.
0 (0 pts) using renewable resources.
(1 pt) poor farming practices.
Answer:
poor farming practices
Explanation:
You are an engineer moving around your community and you find out that they are floods everywhere. What will you advise the community to do to improve the drainage?
Answer:
it depends on the severity of the flooding, if its extreme id say build canals
Explanation:
pure water has a pH of_
a. 6
b. 7
c. 8
d. 9
Answer:
It has a pH of 7, so your answer is therefore B.) 7.
Answer:
7
Explanation:
Which type of ATP production requires oxygen?
Answer:
Cellular respiration
Answer:
Cellular respiration
Explanation:
because it needs it to release energy from food for use by cells.
which of these primate groups is most closely related to hominids?
Answer:
apes such as chimpanzees
True or false? The effectiveness of an exchange surface is increased if there is a long diffusion path.
Answer:
True
Explanation:
The Long and Diffusion Path can Help the exchange surface to increased rapidly in a long diffusion path. in other words it grows faster.
If the diffusion path is long, the effectiveness of an exchange surface is improved is false.
What is diffusion?Diffusion is defined as the net movement from an area of higher concentration to an area of lower concentration caused on by the dispersal of any material's in-solution or gas-particle particles.
Diffusion is the process by which dissolved chemicals enter or exit cells.
What are the parameters that affect the diffusion?the three parameters that affect diffusion are
The concentration gradient. temperature.length of diffusion pathway.the membrane's surface area.The rate of diffusion increases with the magnitude of the concentration gradientThe rate of diffusion will increase as the temperature rises.Diffusion will occur at a faster rate if one cell membrane is larger than another.How may an exchange surface's effectiveness be enhanced?a wide surface area. a thin membrane to offer a short diffusion pathway. an effective blood supply.ventilation of the animals.learn more about diffusion here https://brainly.com/question/2135861
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model of a cell cycle
The cell cycle, or cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells.
this is your answer
B. Directions. Read the given statement and provide the answer. You are in a community park. While walking, you have noticed that there are many rocks on the ground. From these rocks, how will you know if they are igneous rocks? What are the things you should consider in identifying igneous rocks?
the glenoid fossa is rimmed by the fibrocartilaginous
Answer:
glenoid labrum.
Explanation:
The glenoid fossa is rimmed by the fibrocartilaginous
guys pls help me by saying answer
Science
heart
Answer:
vena cava: deoxygenated
it carries deoxgenated blood from the body back to heart.
aorta: oxygenated
Carries oxygenated blood from the heart around the body.
pulmonary artery: deoxygenated
Carries deoxygenated blood from the heart to the lungs.
pulmonary vein: oxygenated
Carries oxygenated blood from the lungs to the heart.
left atrium: oxygenated
receives blood full of oxygen from the lungs and then empties the blood into the left ventricle.
that's all I found from the question
describe the appearance of the vacuole in a well watered plant
Answer:
Describe the appearance of the vacuole in a well-watered plant. What effect would this have on the cell wall of the plant? The vacuole would expand and take up most of the space inside the cell. This would create internal pressure on the cell wall.
Explanation:
how do potassium channels select the ion that can travel through the channel? group of answer choices membrane-spanning subunits concentration pore loop voltage
Answer: Potassium channels allow K+ ions to easily diffuse through their pores while effectively preventing smaller Na+ ions from permeation. ... This selection process occurs at the narrow selectivity filter that contains structurally identified K+ binding-sites
Explanation:
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Which statement accurately describes the bond that forms between carbon and oxygen to create carbon dioxide
Answer:
It's a non-polar covalent bond.
Explanation:
Non-polar means they do not interact with water. Carbon dioxide and Oxygen bonded together by sharing electrons equally.
Which of the following accurately describes facilitated diffusion
Answer:
Xarwdef
Explanation:
Wha is biology and how it started and what kind of biology is this
Answer:
Basically biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine, and the works of Aristotle and Galen in the ancient Greco-Roman world. This ancient work was further developed in the Middle Ages by Muslim physicians and scholars such as Avicenna. During the European Renaissance and early modern period, biological thought was revolutionized in Europe by a renewed interest in empiricism and the discovery of many novel organisms
Explanation:
Answer:
Basically biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine, and the works of Aristotle and Galen in the ancient Greco-Roman world. This ancient work was further developed in the Middle Ages by Muslim physicians and scholars such as Avicenna. During the European Renaissance and early modern period, biological thought was revolutionized in Europe by a renewed interest in empiricism and the discovery of many novel organisms
quién me ayudaría a hacer este crusigrama
gracias
Answer:
Respuesta: hola ami me parece que ya lo hiciste pero te dejo ejemplos:
Explicación: 1.Venezuela
2. Sanclemente
3. Marroquin
me das corona plis chau
Explanation:
How to use bacteria as a treatment for sewage waste
Answer: hope this helps
Explanation:
Aerobic bacteria use oxygen, which is added mechanically, to break down wastewater contaminants, converting it into energy. Bacteria use this energy to grow and reproduce. Anaerobic bacteria obtain oxygen from their food source. As anaerobic bacteria break down sludge, they produce methane gas. This methane gas can be used as an alternative energy source, called biogas, to fuel the wastewater treatment process.
Explanation:
Biological wastewater treatment is the most common method of sanitation in the world. This technology uses different types of bacteria and other micro-organisms for the treatment and cleaning of polluted water.
Wastewater treatment is as essential to human health as it is to environmental protection. Indeed, the use of these bacteria accelerates the treatment of pollution on a small surface: the purification plant. It’s better than letting the river handle it, because even though it’s the same purification process that occurs in nature, the quantities of pollution discharged today are too high to keep the natural cycle intact.
Thus, sewage treatment plants can prevent eutrophication of rivers, for example, but also prevent the diffusion of diseases.
Municipal and industrial effluent is the main source of wastewater. And thanks to the use of micro-organisms, we are able to degrade the content of these organic wastes as they are used as a source of food and energy to grow and multiply.
10. What 5 traits do the bird and its closest relative share?
Answer:
Feathers.
High metabolism.
A four-chambered heart.
A beak with no teeth.
A lightweight but strong skeleton.
Production of hard-shelled eggs.