A skin cell divides to make a new skin cell. Which component of cell theory does this best illustrate?All living things are made of cells.
Cells are the basic unit of structure and function of all living things.
All cells come from other cells.
Cells are generated from nonliving materials.

Answer:

See the answer below

Explanation:

If pink eye is recessive, it means that the normal eye is the dominant trait. According to Mendelian law, the ratio of normal to pink eye in a cross involving two heterozygous mice should be 3:1.

Chi-square = where O = observed frequency and E = expected frequency.

Phenotype      Observed            Expected          Chi-square

Normal                 18                3/4 x 20 = 15           = 0.6

Pink                       2                  1/4 x 20 = 5           = 1.8

Total Chi-square = 0.6 + 1.8 = 2.4

Degree of freedom = 2 - 1 = 1

Critical Chi-square value at 95% = 3.841

The critical Chi-square value is more than the calculated value. Hence, the observed number of offspring fits the expected number of offspring.

Answer:

Physical Layers:

- Crust

- Mantle

Compositional Layers:

- Asthenosphere

- Mesosphere

Explanation:

Physical Layers refer to the layers of the Earth based on their physical properties such as their state (solid or semi-solid) and how they behave. The two primary physical layers are the Crust and Mantle.

- Crust: The Earth's Crust is the outermost layer, which includes the solid ground we walk on. It is relatively thin compared to the other layers and is where we find the continents and ocean floors.

- Mantle: The Mantle lies beneath the crust and is semi-solid, extending to a depth of about 2,900 kilometers (1,800 miles). It's responsible for the convective movement of the Earth's tectonic plates.

Compositional Layers, on the other hand, are based on the chemical composition of the Earth's interior. They include:

- Asthenosphere: The Asthenosphere is part of the upper mantle and is composed of partially molten rock. It's semi-fluid, allowing for the movement of tectonic plates. This is crucial for plate tectonics and the Earth's surface dynamics.

- Mesosphere: The Mesosphere is not typically considered a distinct compositional layer in the Earth, but rather part of the lower mantle. It consists of solid rock that behaves plastically, allowing for convection currents to occur deep within the Earth.

Answer: It is greater when sucrose concentration went from 2.5 to 7.5g/l.

Explanation: The rate of reaction of an enzyme is known to be affected by the rate of concentration of its substrate, which in this case is the sucrose Solution.

If the rate of increase of concentration is high,the activities of the enzyme SUCRASE will increase accordingly, in order to breakdown the substrate.

The rate of increase of Sucrose from 2.5 to 7.5g/l is higher(300%) than the rate of Increase of Sucrose from 22.5 to 27.5g/l (1.22%). It is expected under circumstances that the action of SUCRASE will increase at a rate higher in the first Solution than in the second Solution.

Final answer:

The rate of increase in sucrase activity depends on the concentration of sucrose and whether or not the enzyme is saturated. The increase could be greater at lower concentrations (2.5 to 7.5 g/l) if sucrase is not yet saturated. The increase might be less at higher concentrations (22.5 to 27.5 g/l) if sucrase is near or at saturation point.

Explanation:

The increase in sucrase activity is generally considered to be a response to the concentration of substrate present, in this case, sucrose. The increase in activity happens because more substrate (sucrose) is available for the enzyme (sucrase) to act upon. However, there is a limit to this increase. Once the enzyme is saturated with substrate, further increases in substrate concentration do not increase the enzyme's activity. This is known as the saturation point.

To determine whether sucrase activity increased more when sucrose concentration increased from 2.5 to 7.5 g/l or from 22.5 to 27.5 g/l, we would need specific data on the rate of sucrase activity at these different concentrations. It's possible that the increase from 2.5 to 7.5 g/l was greater if this is in the ascending portion of the enzyme activity curve and the sucrase was not yet saturated with sucrose. Conversely, the increase from 22.5 to 27.5 could be lesser if the sucrase is near or at saturation point.

Learn more about sucrase activity

The correct answer is True

Explanation:

In geography, the term "landform" refers to a natural shape or form that can be found on the surface of Earth such as mountains, hills or canyons. All of these are formed through different processes such as movement in tectonic plates. Additionally, these are considered as a physical feature of Earth as landforms define the shape and features of the Earth's surface and also influenced other physical phenomena such as weather or wind patterns. According to this, it is true landforms is a physical feature on Earth's surface.

Answer:

True*

Explanation:

The cells are not able to stop the flow of the mentioned harmful substances into the cell as they fail to recognize them as foreign entities. These foreign toxins have intracellular targets with which they bind and lead to death of the cell.

Cell death due to foreign toxins:

The plasma membrane is formed of lipids. The toxins produced by the bacterial cells are water soluble. Therefore, they identify particular receptors on the membrane and associate with them. Thus, cell at certain occasions fail to identify them as foreign entities.

They combine with the plasma membrane of the cell and induce pore formation, however, there are many toxins that invade the cell and possess intracellular targets via endocytic vesicles. With the help of these vesicles, they deliver their enzymatic domain into the cytosol and results in the death of the cell by obstructing the metabolism of the cell.

Thus, cells fail to identify the bacterial toxins as foreign entities and they invade the cell and results in cell death.

Find out more information about invasion of foreign toxins here:

brainly.com/question/1799605

Answer:

There are specific receptors present on the surface of the normal cell membrane to recognize the molecules to allow them to pass or not. Most of the bacterial toxin are water-soluble molecules, and bound to the cell surface and interact with them as some time antibody-antigen interaction or cell recognition does not occur that form a pore in the cell membrane and toxins move into the cell.

Once toxins enter the cell they attack intracellular targets through endocytic vesicles. Ultimately these ends in cell death.

Answer:

The correct option is: c. a doorknob contaminated with the cold virus

Explanation:

Fomites are the inanimate objects or substances that can get contaminated with the pathogens and are capable of transferring the pathogens to the new hosts.

Sterilization of the possible fomites should be done in order to prevent cross-infection.

Examples of fomites are hair, towels, clothes, door knobs, cups, switches, handrails, remote controls, pens, syringes, bedding, etc.