Active transport is the movement of molecules across a cell membrane from a region of their lower concentration.
What do you mean by active transport?Active transport usually happens across the cell membrane. There are thousands of proteins embedded in the cell's lipid bilayer. Those proteins do much of the work in active transport.
Active transport requires energy. It could be compared to a ball moving up a hill. Active transport is the transport of molecules that require the use of energy, in the form of an energy-storing chemical called ATP to help them cross the cell membrane.
The energy for active transport comes from the energy-carrying molecule called ATP (adenosine triphosphate). Active transport may also require proteins called pumps, which are embedded in the plasma membrane.
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Why do elodea and onion cells have more consistent shapes than human epithelial cells?
Final answer:
Elodea and onion cells have consistent shapes because of their rigid cell walls, while human epithelial cells exhibit a variety of shapes due to their flexible plasma membranes and specialized roles within the body.
Explanation:
Elodea and onion cells have more consistent shapes than human epithelial cells due to their cell walls and the environments they inhabit. Plant cells, such as those of Elodea and onion, possess rigid cell walls made primarily of cellulose. This feature gives them a fixed, often rectangular shape, allowing for a consistent cellular arrangement similar to bricks in a wall. In contrast, human epithelial cells lack cell walls and exhibit a variety of shapes due to their specialized functions and locations within the body. Epithelial cells can be flat (squamous), cube-shaped (cuboidal), or columnar (taller than they are wide), and their shapes can even change in transitional types, adapting to the specific needs of the tissue or organ they form part of. This adaptability is essential for functions such as absorption, protection, and secretion. Furthermore, the presence of a flexible plasma membrane instead of a rigid cell wall allows human cells to alter their shape, enabling processes like cell movement and tissue repair.
In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?
The explanation regarding the given situation should be described below:
The following information should be considered:
In the case of rock layers, the fossils should be found and less than trilobite fossils, and trilobite fossils are found less than ammonite fossils.It could be measured that jelly fish should be existed prior trilobites and ammo-nites.Learn more: https://brainly.com/question/13013054?referrer=searchResults
Which of the following is an accurate description of an adult stem cell?
A. Totipotent
B. Blastocyst
C. Multipotent
D. Embryonic
How many stacked pennies would reach the moon? (assume that a penny is 1 mm thick.)?
How are proteins are made, packaged, and transported within the cell?
Ribosomes are the protein factories of the cells. They use the genetic instructions from the nucleus to assemble the proteins of the cell, as well as other proteins the body needs.
The nuclear membrane is connected to the endoplasmic reticulum (ER). The ER is a network of membranes in layers, sacs, and tubes where organic molecules are made. These membranes work with the Golgi apparatus, the cell's vesicles and vacuole, and are collectively known as the endomembrane system. The endomembrane system is involved in producing, sorting, and packaging materials of the cell.
The endomembrane system transports materials around the cell. Some parts of the endomembrane system also participate in transporting substances out of the cell.
hope this helps.............
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What two organelles are not found in cheek cells compared to plant cells?
A(n) _______ is a long period of time with little or no rain.
Rabbits can breed for the first time at the age of three months. They have a gestation period of about 31 days and there can be anywhere from 4 to 12 young in each litter. What would be the most likely long-term consequence if a breeding pair of rabbits were released into an ecosystem with no predators large enough to eat a rabbit?
The rabbit population would grow quickly until all the edible vegetation was gone and then the rabbit population would crash.
Some patients who are given a sugar pill to treat headaches feel much better. this is an example of the:
Answer: Placebo effect
Explanation:
They believed the pill was meant to help with their headache so it did. Even though the pill was fake.
What type of graph is represented by figure 1-1?
A) bar
B)line
C)circle
D)none of the above
Answer:
B) Line.
Explanation:
A line graph is used to visualize the value of something over time. The graph consists of two axes, Horizontal-X and Vertical-Y.
In the graph showed in the question the Horizontal X-axis is the distance in time, in this case in seconds. And the Vertica Y-axis is the distance in meters.
I hope this answer helps you.
(Will give brainliest and thanks) Explain how earths hydrosphere and atmosphere interact during hurricane formation
When the air above the warm ocean water is warmed and evaporated in the form of water vapors. These vapors act as a fuel for the hurricane formation as it is strengthened by the latent heat released by condensation of the vast amounts of water vapor.
Which effect will the nurse expect to observe when a client is stressed and epinephrine is released?
The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by _____.
astroid sized debris colliding together
A disk of gas and dust encircled the newborn Sun in the early stages of the Solar System. Two hypotheses explain how, over the period of millions of years, the inner rocky planets developed from this primary constituent.
What inner planets are believed to have been formed by?Mercury, Venus, Earth, and Mars are the inner planets of our solar system. They were formed from small dust particles and larger solar nebula particles that collided over millions of years to create larger and larger particles. These ultimately developed into protoplanets.
It is thought that the same rotating disc of material that gave rise to the Sun also gave rise to the in our solar system. Hydrogen and helium made up the majority of this disc, known as the solar nebula, with other elements present in lesser amounts.
Therefore,The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by (asteroid sized debris colliding together
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I break down organic matter into simpler compounds. I am a?
what is the limiting factor in oligotrophic lakes?
Which organism is an example of a producer? moth mushroom rose cheetah
Rose
Explanation;Producers are organisms that make their own food. They are also called autotrophs, they include plants, algae, and some bacteria. Producers create food for themselves and also provide energy to the rest of the ecosystem. Producers make their food using the process of photosynthesis for green plants and algae, and chemosynthesis for chemosynthetic bacteria.Consumers are organisms that can not make their own food but obtains energy from producers when they eat then.An organism that can make its own nourishment is referred to as a producer. A plant is the most prevalent illustration of a producer. Photosynthesis is the process by which plants turn solar energy into the fuel they need to produce their own sustenance.
We call this process autotrophy. The only organism that can undergo autotrophy among the options is the mushroom. Fungi, like mushrooms, are able to perform photosynthesis. They harness the power of the sun to grow their own food.
They are crucial for the ecosystem because they produce oxygen as a byproduct. In conclusion, the mushroom is a creature that serves as an illustration of a producer.
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How does soil erosion affect the environment?
Explain how the surface tension of water is important in the biological world
How might living in the sahel be different from living in a rain forest?
If a patient is prescribed a medication that is available in 15-mg tablets and is directed to take 60mg daily, how many tablets will be given for a 30-day supply
Answer:
120 tablets
Explanation:
Given-They will take 60 mgs per day.
- 60/15= 4 tablets
4 tablets x 30 days = 120 tablets
I hope this helps :)
Which statement about somatic mutations is true? A)They exist in all the cells of the body. B)They are acquired through exposure to mutagens. C)They are inherited via sperm and egg cells. D)They are passed on to offspring.
They exist in all the cells of the body. They are inherited via sperm and egg cells.
They will not be inherited unless a similar damage has happened in eggs or sperms due to the same exposure to mutagen, In that case, progeny might show the mutation.
But they are an inherited mutation that was supported in fertilization of the egg during reproduction.
Answer:
Pretty sure its C for PLATO
Explanation:
why do humans sweat and dogs pant
Humans sweat due to numerous active sweat glands facilitating cooling by evaporation, while dogs pant, evaporating water from their respiratory system to regulate their body temperature.
Humans sweat and dogs pant as ways to regulate their body temperature, also known as thermoregulation. Humans have developed sweat glands that secrete watery sweat, which cools us as it evaporates from the skin. On the other hand, dogs rely on panting to cool down. When a dog pants, it evaporates water from its tongue and respiratory tract, using body heat, which helps to lower its body temperature.
These differences are due to evolutionary adaptations. In humans, the loss of body hair and development of extensive sweat glands allows for efficient cooling during activities or exposure to high temperatures.
Differentiation occurs in what types of cells?
Nerve cells
Muscle cells
Skin cells
Stem cells
Cell differentiation occurs in stem cells. They have the potential to develop into many different specialized cell types, such as nerve cells, muscle cells, and skin cells during early life and growth. Nerve cells, muscle cells, and skin cells don’t undergo differentiation as they are already differentiated.
Explanation:Cell differentiation inherently occurs in stem cells. Stem cells are unique cells that have the remarkable potential to develop into many different cell types in the body during early life and growth. They can divide without limit to replenish other cells as long as the person or animal is still alive. When a stem cell divides, each new cell has the potential to either remain a stem cell or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, a nerve cell, or a skin cell. In contrast, nerve cells, muscle cells and skin cells are already differentiated, and thus, do not undergo differentiation. They are the result of differentiation process.
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A plant may open and close its stomata to prevent excess water loss and maintain _____.
adaptability
homeostasis
negative feedback
a system level
A challenge to traditional (pre-1860) ideas about species came from embryology, when it was discovered that _____. a challenge to traditional (pre-1860) ideas about species came from embryology, when it was discovered that _____. all animals develop similar embryonic gills mutations have a far more dramatic effect on embryos than on adult organisms the embryological development of many plants and animals is almost identical embryos of dissimilar organisms, such as sharks and humans, resemble each other the more advanced the a
The most important reason to wash, rinse and sanitize a meat slicer or knife is to:
The most important reason to wash, rinse and sanitize a meat slicer or knife is to: prevent it from harboring and breeding harmful microorganisms such as bacteria.
Washing or sanitizing a meat slicer or knife after use is very important. When a meat slicer or knife is not cleaned or sanitized regularly, meat can accumulate in it and allow harmful microorganisms such as bacteria to grow. The organism (bacteria) can contaminate foods and lead to foodborne diseases.
What factor will most likely determine where a wave current project can be located
The correct answer is B) the presence of waves.
The factor that will most likely determine where a wave current project can be located is "the presence of waves."
Waves are great generators of power. Waves represent a correct, clean, and a source of energy that is renewable for countries in these times when we have to take care of the environment. Although the projects are costly, the investment is efficient and it has the potential to generate up to 40 to 50% of the electricity needed. Ocean wave energy is truly a clean option to generate power in industries and cities.
The other options of the question were A) current climate conditions. C) temperature of the water. D) type of waves generated.
What organelles found in plant and animal cells are also found in bacterial cells?
Research on how the south African government is addressing the challenges of accidents and risky behaviors among people in following areas, arrive alive, road accident fund, HIV and aids awareness campaign, 16 days of activism against women and child abuse
Describe at least one function for each type of biological macromolecule?
Answer:
C,D
Explanation:
C: Proteins play a role in transport, enable movement, provide structure and support, and help make chemical reactions happen.
D: Nucleic acids carry genetic information, determine the structure of proteins, and help build proteins.