Norman grew skin in a lab by adding skin cells to a synthetic material. The skin functioned normally for 12 days. Then Norman separated some of the skin cells into cell membranes, cytoplasm, and vacuoles to study them.
Which of the following were alive during Norman's experiment?
o the skin and the cytoplasm
o the skin and the skin cells
o the cell membranes and the skin cells
O the cell membranes and the cytoplasm

Answer:

Una de las ventajas de los reflejos simples es que permiten reaccionar rápidamente a estímulos externos sin necesidad de procesar la información en el cerebro. Esto ayuda a proteger al organismo de posibles daños o amenazas y a mantener el equilibrio y la homeostasis. Otra ventaja es que los reflejos simples son invariables, es decir, siempre se producen de la misma manera ante un mismo estímulo.  Esto garantiza una respuesta eficaz y predecible.

Explanation:

Answer:

hope it helps mate

Explanation:

a) Two factors they need to keep the same in their investigation are the type of plant they are using and the amount of water and light they give each plant.

b) The factor they change is the amount of water and light they give to each plant.

To get their results, they measure the growth of each plant over a set period of time. They may also measure other factors such as the number of leaves, the height of the plant, or the color of the leaves to determine the overall health of the plant.

a) In their investigation, the students need to keep two factors the same:

1. Temperature: They must maintain a constant temperature of 25°C throughout the experiment.

2. Control substances: They need to keep the substances used in the control situation the same.

b) The factor they change is:

The students change the conditions related to the pH of the reaction mixture, the amount of yeast added, and the type of sugar used.

a) In their investigation, the students need to keep two factors the same:

1. Temperature: They must maintain a constant temperature of 25°C throughout the experiment. This ensures that any changes in the rate of fermentation are solely attributed to the variables they are testing.

2. Control substances: They need to keep the substances used in the control situation the same. This includes using 25 ml of buffer pH 7, 2 grams of sucrose, and 2 grams of yeast. Keeping these constant allows for a baseline comparison against the experimental conditions.

b) The factor they change is:

The variable being tested: The students change the conditions related to the pH of the reaction mixture, the amount of yeast added, and the type of sugar used. These variables are altered to observe their effect on the rate of fermentation.

To obtain their results, the students measure the pressure generated during the fermentation process. They use a Vernier Equipment Pressure sensor connected to a LabPro interface to record the pressure values over time.

By collecting and analyzing the pressure data, they can assess the rate of fermentation under different experimental conditions. The pressure readings indicate the gas produced as a byproduct of fermentation, providing a quantitative measure of the fermentation rate.

This allows the students to determine the optimal conditions for the new fermentation process to be used at the local bakery.

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Answer:Improving livestock breeds to allow greater feed efficiency and other desirable traits. food production, restoration of threatened and endangered species populations, wild stock population enhancement, the building of aquariums, and fish cultures and habitat restoration.

Explanation: hope this helps

Answer:

The answer is option C

Explanation:

A protein deficiency causes diverse symptoms because immune, nervous, and muscle system cells require proteins for structure and regulation.

Proteins are the building blocks of bones, muscles, cartilage, skin, and blood. They also help in transporting oxygen, helps in blood clotting during injuries, etc.

Answer:

In the CGS system, fundamental units are Centimeter, Gram and second. MKS system – Meter kilogram second system. In the MKS system, fundamental units are Meter, kilogram and second. FPS system – Foot Pound second system. In the FPS system, fundamental units are Foot, Pound and second.

Explanation:

have a nice day

Answer:

Explanation:

CGS system : Centimeter, Gram and second.

MKS system : Meter, kilogram and second.

FPS system :  Foot, Pound and second.

A. Coral reef life needs saltwater to survive, therefore it is SALTWATER.

B. Estuaries are partially enclosed water bodies in the coast, where freshwater from rivers/stream mixes with salt water from the ocean, therefore it is BOTH.

C. Rivers and streams have populations that are adapted for freshwater, so it is FRESHWATER.

D. Open oceans have high salinity, therefore it is SALTWATER

E. Lakes can be freshwater or saltwater, and ponds are usually freshwater, with the rare exception of ponds that are on natural salty areas or filled up by tidal flow. Therefore, it is BOTH.

F. Wetlands are areas of land that is covered with water for a certain period. There are freshwater and saltwater wetlands, therefore it is BOTH.

The lactose operon is like a group of genes that help break down lactose, which is a sugar found in milk. And if a bacterium wants to use lactose for energy, it needs to break it down first.

So, if scientists wanted to engineer a bacterium that could triple the digestion of lactose in the operon, they might add or subtract certain parts of the operon to make it more efficient at breaking down lactose. For example, they might add extra copies of genes that are responsible for breaking down lactose, or they might remove parts of the operon that are slowing down the digestion process.

But, like, to be honest, I'm not really sure exactly which parts they would add or subtract. I think it would depend on the specific bacterium they're working with and the specific genes in the lactose operon. And the scientists would need to do a lot of experiments and testing to figure out what works best.

Hope this helps!

Here is an analysis of the changes in vegetation and species diversity based on the data:

In the first years after logging, the area was dominated by grasses, with 32 species present after 1 year. Shrubs and trees were initially absent. This indicates that grasses rapidly colonized the disturbed area after logging.

Over time, the number of grass species declined as shrubs and trees became established. Shrubs first appeared after 5 years and gradually increased, with 18 species present after 45 years. Trees were absent for the first 15 years but then increased to 24 species after 45 years.

The total number of species showed a steady increase over the 45 years, from 32 species initially to a maximum of 77 species after 45 years. This indicates that species diversity was low immediately following the disturbance but gradually recovered and surpassed the original diversity levels.

The pattern of changes suggests that after the initial disturbance of logging, grasses were the first vegetation to recover and colonize the open area. Then over time, shrubs and trees established and the plant community transitioned from grasses to shrubs to trees. This successional progression from early to later species resulted in an overall increase in species diversity as different types of plants colonized the area.

In summary, the key conclusions supported by the data are:

Answer:

The correct answer is - stem.

Explanation:

Sugarcane plants are grown from the cuttings of the sugarcane and planted in soil horizontally. There are rings present at each stem form by the falling of the old leaves. Roots come from the stems planted horizontally from small nodes present on stems.

Sit needs to cut the sugarcane stems and planted them in the soil horizontally to grow the sugarcane plant but it needs to be remembered that sugarcane plants required sunlight to grow.

I'm confident that the production of blood cells can be described using a strong system like the computer models because they are used to depict real-life events.

Merks and his colleagues use computer simulations to examine the development of blood arteries. "We began with a common angiogenesis model. The endothelial cell is the only type of cell in this model. However, tip cells and stalk cells are the two different kinds of endothelial cells. Although experiments have indicated that tip cells are essential for angiogenesis, the specific process is unknown. To vary the behavior of certain of the model's cells, we have given them a new color. The tip cells can be moved so that they are at the leading edge of a fresh blood artery.

As a result of a stalk cell pushing the tip cell toward the front of the vessel, a new side branch develops. The emerging network is impacted by this.

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Answer:

Correct answer-C

Explanation:

I'm built different!

Answer:

Answer:C

Explanation:When the racket hits the tennis ball, the racket is transferring energy it built up when the person swung back the racket.Then the tennis ball will increase in kinetic energy.

Answer:

Advection by ocean currents modifies phytoplankton size structure at small scales (1–10 cm) by aggregating cells in different regions of the flow depending on their size. This effect is caused by the inertia of the cells relative to the displaced fluid

The rotation of a diatomic molecule can be described by the rigid rotor model. To imagine this model think of a spin. It has two masses set at a fixed distance from one another and spins around its center of mass (COM).

This model can be made even simpler by utilizing the concept of reduced mass, which enables the problem to be handled as a single body system. Diatomic molecules are molecules composed of only two atoms of the same or different chemical elements, hence their name. If a diatomic molecule has two atoms of the same element, such as oxygen (O2) or hydrogen, it is said to be homonuclear (H2). However, a molecule is said to be heteronuclear if it has two different atoms in a diatomic substance, such carbon monoxide (CO) or nitric oxide (NO). A non-polar connection exists in a homonuclear diatomic molecule.

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Answer:

microtubules

Explanation:

Microtubules specific cytoskeletal element is most susceptible to mitotic inhibitors.

The third main component of the cytoskeleton, microtubules, are hard, hollow rods with a diameter of around 25 nm. Microtubules are dynamic structures that constantly assemble and disassemble within the cell, similar to actin filaments.

They have a role in a number of cell motions, including as some types of cell motility, the intracellular movement of organelles, and the division of the chromosomes during mitosis, in addition to determining the shape of the cell.

Microtubules, which typically consist of 13 linear protofilaments arranged around a hollow core, are created when tubulin dimers polymerize to generate them. The head-to-tail arrays of tubulin dimers that make up the protofilaments are organized in parallel.

Therefore, Microtubules specific cytoskeletal element is most susceptible to mitotic inhibitors.

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Answer:

The first part states that all organisms are made of cells. The second part states that cells are the basic units of life. These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells.

Explanation:

The energy transfer that occurred between the lanuch of a rocket and its continuing flight out of the atmosphere is that the chemical energy stored in the fuel of the rocket is transformed into heat energy.

Energy transfer is defined as the process by which a form of energy is being transformed to another form without destruction of the energy.

There are various ways by which energy can be transferred and it includes the following:

When a rocket is being launched, the chemical energy in its fuel would be converted to another form of energy called heat energy through the actions of mechanical and heating processes of the rocket engine.

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Answer:

When placed in a hypertonic solution, a red blood cell will lose water and undergo crenation (shrivel).

Explanation:

Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion (or simple diffusion), osmosis, and facilitated diffusion. Simple diffusion and osmosis do not involve transport proteins. Facilitated diffusion requires the assistance of proteins.

Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. For cell transport, diffusion is the movement of small molecules across the cell membrane. The difference in the concentrations of the molecules in the two areas is called the concentration gradient. The kinetic energy of the molecules results in random motion, causing diffusion. In simple diffusion, this process proceeds without the aid of a transport protein. It is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration.

Temperature regulation is the human condition chosen for this project. The human body must maintain a core body temperature of around 37°C, despite environmental temperature changes. The following information answers the questions:

Factors that can shift the body temperature include exposure to hot or cold environments, fever, and physical activity.

The organ systems involved in the homeostasis process of temperature regulation are the nervous and endocrine systems, as well as the integumentary (skin), cardiovascular, and respiratory systems.

Negative feedback is used to maintain temperature homeostasis. For example, when the body temperature rises, the hypothalamus signals the sweat glands to secrete sweat, which cools the skin and lowers the body temperature.

The stimulus is the change in body temperature, the receptor is the thermoreceptor in the skin or hypothalamus, the integrating center is the hypothalamus, the effector is the sweat glands or muscles, and the response is sweating or shivering.

Strategies to help maintain temperature balance include wearing appropriate clothing, using heating or cooling devices, and maintaining physical fitness through exercise.

Sources:

Guyton and Hall Textbook of Medical Physiology, 13th edition

Saladin Anatomy and Physiology, 8th edition

Tortora and Derrickson Principles of Anatomy and Physiology, 15th edition

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Answer:Green house effect and the 1st one

Explanation:I just know this from my years in science.

Answer:

the first answer is the greenhouse effect. the second answer is the first option.

Explanation:

it's the greenhouse effect because it shows the energy being trapped.

Answer:

the element is potassium

From this cross of individuals that are heterozygous for a particular trait, the expected genotypic ratio of the F1 generation would be 1 AA: 2 Aa: 1 aa. The expected phenotypic ratio would be 3 individuals with the dominant trait (A_) to 1 individual with the recessive trait (aa).

Consider a cross between two individuals that are heterozygous for a particular trait.

Let A represent the dominant allele and a represent the recessive allele.

The genotypes of the parent generation (P generation) are Aa × Aa.

Punnett square for this cross:

       |  A   |   a   |

-------|------|------|

  A   |  AA  |   Aa  |

-------|------|------|

  a   |  Aa  |   aa  |

-------|------|------|

The Punnett square shows the possible combinations of alleles from the parent generation and predicts the genotypes and phenotypes of the offspring in the F1 generation.

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Answer:

gloves

Explanation:

This is how folloeing parts of our body assist in excretory system:

LIVER

Liver excretes bile juice which helps in maintaining the chemical levels in the blood and removing the waste away with digestive wastes.

It is the site for protein metabolism, where proteins are broken down to form amino acid which further gets converted into nitrogenous wastes like ammonia, urea, uric acid, etc.

It also helps in the conversion of ammonia into less toxic urea that is excreted through urine.

SKIN

Skin helps in the process of excretion through sweating which happens because of sweat glands present in the body. The sweat evaporates and helps to keep the body cool when it is warm outside. By eliminating water, salts and urea skin assist in the process of excretion.

ECCRINE

Eccrine glands allow excess water to leave the body just like sweat glands. The majority of eccrine glands are located mainly on the palms, the bottoms of the feet, and the forehead, although the glands are everywhere throughout the body. They play a large role in controlling the body temperature of humans.

Thus, we can see how through different parts of our body system human excretes.

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Blue-green algae are photosynthetic prokaryotes, while fungi are eukaryotes that obtain nutrition through absorption.

Blue-green algae and fungi are both organisms, but they belong to different domains and have distinct characteristics. Blue-green algae, also known as cyanobacteria, are classified under the domain Bacteria, while fungi belong to the domain Eukarya.

Blue-green algae are prokaryotic organisms, lacking a true nucleus and membrane-bound organelles. They obtain energy through photosynthesis and are capable of converting sunlight into chemical energy. They typically inhabit aquatic environments, such as lakes, ponds, and oceans, and some species can fix atmospheric nitrogen.

On the other hand, fungi are eukaryotic organisms with a distinct nucleus and membrane-bound organelles. They obtain nutrition by absorbing organic matter from their surroundings. Fungi play crucial roles in decomposition and nutrient cycling in ecosystems. They can be found in various habitats, including soil, plants, and even as symbiotic partners with other organisms, such as in mycorrhizal associations.

In summary, the primary differences between blue-green algae and fungi lie in their cellular structure, mode of nutrition, and classification. While blue-green algae are photosynthetic prokaryotes, fungi are eukaryotes that obtain nutrition through absorption. Understanding these distinctions helps in appreciating the diversity and ecological significance of these two groups of organisms.

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Answer:

provide structure

fight disease

regulate cell process

transport substances

Explanation: