according to the lab manual, today you will study mitosis by preparing a slide of living ______ cells, which will be fixed and stained.

Answer:

Explanation:

they have 2 OH bonds - which are hydrogen bonds,

they're polar due to the difference in electronegativities of oxygen and hydrogen

Answer:

Why do phase changes occur?

1. Compare: Set the Water temperature to 0 °C and click Play. Observe the water molecules.

Click Reset, set the Water temperature to 100 °C, and click Play again.

What do you notice? The water molecules are moving slightly faster at 100 °C than at 0 °C.

[Note: This difference may be too small to observe easily.]

2. Observe: Click Reset. The mean molecular speed of the water molecules is displayed

below the container. Set the Water temperature to 0 °C and Add/remove heat energy to

400 J/s. Click Play.

A. How does the mean speed of the water molecules change as they are heated?

The average speed of water molecules increases as they are heated.

B. Does the mean molecular speed change as much as the temperature as the

water heats up? Explain.

Sample answer: For each degree of temperature change, the mean molecular

speed increases by about 1 m/s. At 100 °C, the mean molecular speed is about

17% faster than at 0 °C.

3. Explain: How is temperature related to the motions of molecules?

The higher the temperature, the faster the molecules move.

4. Observe: Click Reset. Set the Water temperature to 20 °C and the Ice volume to 50 cc.

Set Add/remove heat energy to 0 J/s. Click Play. How do the molecules in the liquid

interact with the molecules in the solid?

The molecules of the liquid collide with the molecules of solid, gradually breaking the bonds

between the molecules in the solid and causing the ice to melt.

Explanation:

Answer:

Percentage of offspring with straight hair: 75%

Percentage of offspring with curly hair: 25%

Genotypic ratio: 1:2:1

Explanation:

In a monohybrid cross between two parents heterozygous (carrying one dominant and one recessive allele) for straight hair, where straight hair is dominant (S) and curly hair is recessive (s), the genotypes of the parents can be represented as Ss.

To determine the percentage of their offspring with straight hair and curly hair, we can use Punnett square analysis.

The Punnett square for the monohybrid cross between the parents would look like this:

      S      s

S    SS     Ss

s    Ss     ss

From the Punnett square, we can see that there are four possible genotypes for the offspring: SS, Ss, Ss, and ss.

The genotypes SS and Ss correspond to individuals with straight hair, while ss corresponds to individuals with curly hair.

So, the percentage of their offspring with straight hair would be 75% (3 out of 4 possible genotypes), and the percentage with curly hair would be 25% (1 out of 4 possible genotypes).

The genotypic ratio for their offspring would be 1:2:1, meaning that for every four offspring, one would have the genotype SS (homozygous dominant for straight hair), two would have the genotype Ss (heterozygous for straight hair), and one would have the genotype ss (homozygous recessive for curly hair).

Hope this helps!

Answer:

yes

Explanation:

Viruses are considered non living by many scientists because they are not made of cells and they don't create their own energy. Instead they are proteins and genetic material that survive and replicate inside another form of life.

Light and sound will go through various types of materials at varying speeds as solids, liquids, & gases have highly varied densities.

Light and sound waves behave quite differently from one another. To travel, sound waves need a medium, which is a physical substance. Physical substance is compressed and rarefied (decompressed) to create sound waves. Sound waves can pass through solids, liquids, & gases thanks to the compression and decompression processes.

Behaviour of sound- When a substance is exceptionally thick, its molecules and atoms are packed very closely together, which allows sound to move very quickly. Sound moves significantly more slowly in low density materials like air since the atoms are more widely spaced.

Behaviour of light- When moving through air and space, light moves far more quickly than sound. In addition to air and space, visible light also can pass through other materials. Additionally, several types of glass, polymers, water, and other substances can permit the passage of visible light. Light actually moves more slowly through water & glass than it does through other materials due to their physical variations in composition.

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Answer:

The control group consists of elements that present exactly the same characteristics of the experimental group, except for the variable applied to the latter. This group of scientific control enables the experimental study of one variable at a time, and it is an essential part of the scientific method.

You don't need to be concerned about cutting into the sclera because it is a highly strong layer of the eye. The sclera, exterior muscle elements should be identified when the tissue covering the eye is removed.

Because muscle tissue is firmer than fat tissue, it occupies less room in the body for a given amount of weight. This is one of the reasons why you lose inches when you lose body fat and that clothes fit better. When musculature takes up less room in its body than fat tissue, you appear slimmer and smaller overall.

You don't need to be concerned about cutting into the sclera because it is a highly strong layer of the eye. Once the tissue covering the lens of the eye has been removed, note the remaining exterior muscle parts, the optic nerve, the sclera, and the cornea.

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A cell membrane, also known as a plasma membrane, is a thin, semipermeable barrier that surrounds the cytoplasm of a cell and separates the cell from its environment.

What do you mean by cytoplasm?

Cytoplasm is the fluid-like substance found in the interior of a cell, excluding the nucleus. It is composed primarily of water and contains a variety of organic and inorganic molecules, ions, and organelles. It functions as the cell’s metabolic center and plays important roles in many cell processes, such as energy production, protein synthesis, and cell division.

Five important key features of the cell membrane:

1. Phospholipid Bilayer:  The phospholipid bilayer is important for regulating the flow of substances both into and out of the cell, allowing the cell to acquire the nutrients it needs and expel waste.

2. Glycoproteins: They are important for cell-to-cell communication, as they bind to specific receptors on other cells to facilitate communication between the cells. They also act as recognition sites for hormones and other molecules that enter the cell.

3. Cholesterol: Cholesterol is a fatty molecule that helps stabilize the cell membrane and prevents it from becoming too rigid or too fluid. It also helps regulate the movement of substances across the cell membrane.

4. Integral Proteins: They are important for transporting molecules across the membrane, as well as for recognizing and interacting with other molecules.

5. Peripheral Proteins: They play an important role in cell signaling and regulation, as they can interact with other proteins or molecules on the cytoplasmic side of the cell membrane. They are also important for anchoring the membrane to the cytoskeleton.

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Answer:

When I make an ion in the simulation the simulation says – ion or + ion in the top right part of the simulation.

Answer:

They found that changes in telomeres, part of our DNA that responds to aging, become present in the amniotic fluid as the placenta and other pregnancy tissues get older. These cells could be telling the baby that it's time to be born.

Explanation:

Answer:

During the 28th and 32nd weeks of pregnancy, the baby will begin turning itself into a head-down position, and the baby will also move lower in the pelvis.

Explanation:

Answer:

genes ( tell me if I am wrong thx! )

Explanation:

Answer:

Waning is the opposite, or decreasing after a full moon, and is always illuminated on the left. Then, there is a waxing or waning Gibbous moon, which means more than half of the moon is illuminated. Waxing means to increase/get bigger, and waning means to decrease/get smaller.

Answer:

Due to process of respiration, ATP is formed and release energy by breaking of ATP.

Explanation:

Cells store energy in the form of adenosine triphosphate (ATP) and also release energy in the form of ATP because ATP has a chemical energy which can be gained by breaking down ATP molecule and use this chemical energy in different cellular processes. Cells produces energy in the form of ATP molecule in the mitochondria of the cell by broken down of glucose in the presence of oxygen in the process of respiration. By breaking of ATP, ADP is formed and the energy present in the bond is used by the cell in different activities.

Answer:

A stroke is a non-communicable disease!

Explanation:

Communicable means being able to spread, from one person to another. Typically, those diseases are caused by an infectious agent. A stroke is not caused by a pathogen or infectious agent, but rather poor lifestyle and eating habits.

A stroke is a non-communicable disease because it is not caused by a pathogen or germ that can be transmitted from one person to another. It is typically a result of a combination of risk factors such as high blood pressure, smoking, poor diet, lack of exercise, and/or genetic factors.

hope this helps you

A divergent boundary is one of the three types of plate boundaries, and occurs when two plates separate resulting in ridges. The option is Ridges.

I. Divergent:

This boundary occurs when two plates separate and molten material rises from the mantle creating a new crust.

The hot material creates a new seabed between the separating plates, expanding the sea bottom.

II. Convergent.

This is a Collision area between two plates.

In this last case, the oceanic crust sinks under the continental plate, and magma rises to the surface by crevices. The thicker and older plate subduces under the other plate.

The plates slide laterally with each other, and they are usually called faults.

It is associated, in general, with the oceanic ridge, although it might also occur in the continental plate.

No rocky material is either destroyed or formed.

When the plates move and produce a displacement of one transforming limits from side to side, earthquakes occur.

The movement breaks the crust and originates pronounced fractures.

Ridges are formed when divergent movements occur between plates. For instance, the mid-ocean ridge was created by divergent boundaries. The Atlantic ridge, the Chilean ridge, the East Pacific Ridge, and the Indian ridges.

The correct option is Ridges.

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False.Pernicious anemia is not caused by the bone marrow failing to produce enough red blood cells (RBCs) despite having all the necessary ingredients for erythropoiesis.

Pernicious anemia is actually an autoimmune condition that affects the body's ability to absorb vitamin B12 from the gastrointestinal tract. Vitamin B12 is essential for the production of healthy RBCs.

In individuals with pernicious anemia, the immune system mistakenly attacks the cells in the stomach lining that produce intrinsic factor. Intrinsic factor is necessary for the absorption of vitamin B12 in the small intestine. Without sufficient vitamin B12, the bone marrow cannot produce enough healthy RBCs, leading to anemia.

So, the statement that pernicious anemia is caused by the bone marrow failing to produce enough RBCs despite having the necessary ingredients for erythropoiesis is false. The underlying cause is the impaired absorption of vitamin B12 due to autoimmune destruction of intrinsic factor-producing cells.

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Traces of pesticides are found on raw poultry breasts, which represent a type of contamination known as chemical contamination.

The term chemical contamination is used to denote any type of contamination in which a compound persists in the ecosystem such as occurs in the case of pesticides and herbicides that cannot be removed or degraded by the environment in a given period of time.

Therefore, with this data, we can see that chemical contamination is based on the persistence of a given chemical compound in the environment due to the absence of degradation.

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Answer:

Franklin Pierce actually

Inherited color vision deficiencies are recessive. If both the parents are carriers of color vision deficiency genes, their child will inherit the trait. The carriers of these genes can perceive colors; however, they lack certain photopigments in their retina.

Due to the following reasons, color vision deficiencies would not have disappeared:

Color vision deficiencies are not life-threatening traits. Thus, they do not undergo natural selection. Color vision deficiencies occur with a low frequency (less than 8% of males have some form of color vision deficiency). Therefore, the carriers of these genes are not at a disadvantage from those who do not carry these genes. In some cases, color vision deficiencies could have an evolutionary advantage.

According to the hunter-gatherer hypothesis, individuals with red-green color vision deficiency were better able to detect prey in natural environments. Therefore, red-green color vision deficiency could be an evolutionary advantage compared to the population where all people perceive the same colors. It could be because the hunter-gatherer's deficiency can see through camouflage that may have been perfect for others with normal eyesight.

The carriers of color vision deficiency genes can see better through some color arrangements compared to people with normal vision. For instance, pilots with color vision deficiencies can see aircraft better than those with normal vision. Therefore, color vision deficiencies could be evolutionary advantageous when compared to a population in which all people perceive the same colors.

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Answer:

234

One egg is produced every month in a hope of getting fused with the sperm following fertilization every 14th day of the menstrual cycle .And the whole ne cycle starts following menses in the absence of fertilization.

Answer:

~Shoto todoroki here~

The Bergeret d'Abois proved,The behavior of spiders on human remains.

(Hope this helps!)

Answer:

The behaviour of spiders on human remains

Explanation:

Answer:The correct answer is C

Explanation:

I did the test

The statement that described the most result of less genetic diversity should be option c. where the cheetah population should be less likely to survive.

It means the range where the various inherited traits lies within a species should be considered. In terms of species, there should be high genetic diversity. Also, it contains various individuals that contains various traits. It should be important for the population for adapting the changing environment.

hence, the option c is correct.

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Answer: Eukaryotes are the cells of animals, plants, and fungi and include membrane-bound organelles such as a nucleus and mitochondria.

Explanation: Hoped this helped! :D

Answer:

possible blood type

A. 50%

B. 12.5%

AB. 37.5%

:)

Answer:

Low pressure is called a cyclone and has anticlockwise winds blowing around it. High pressure is called an anticyclone and has clockwise winds blowing around it. I mean the second one.

Answer:

a. clockwise toward the center

Explanation:

Because the winds differ on every side of earth.

Answer:

The correct order of protein production is:

c) 1,2,4,3

Ribosome: Protein synthesis begins in the ribosomes, which are located either in the cytoplasm or attached to the endoplasmic reticulum.

Endoplasmic Reticulum: After the initial stages of protein synthesis in the ribosomes, the newly synthesized protein is transported into the endoplasmic reticulum (ER) for further processing and modification.

Golgi Apparatus: The proteins synthesized in the ER undergo further processing and modifications in the Golgi apparatus. This includes sorting, packaging, and modifying the proteins to their final functional forms.

Secretory Vesicles: Once the proteins are properly processed and modified in the Golgi apparatus, they are packaged into secretory vesicles. These vesicles transport the proteins to their destination, such as the plasma membrane for secretion outside the cell.

Therefore, the correct order is 1, 2, 4, 3.

Answer:

The correct order of protein production is ribosome, endoplasmic reticulum, Golgi apparatus, and secretory vesicles. So the correct answer would be c) 1,2,4,3.

Many proteins destined for the endoplasmic reticulum, the Golgi apparatus, lysosomes, the plasma membrane, and secretion from the cell are synthesized on ribosomes that are bound to the membrane of the endoplasmic reticulum. The Golgi apparatus then distributes these proteins and lipids that it receives from the ER.

Answer:

To ensure that good and reliable data are collected.

Explanation:

:)

Thorax is the portion between neck and abdomen which consists of thoracic cavity and many other organs such as heart, lungs and blood vessels.

Thorax consists of sternum, ribs, and thoracic vertebrae. It supports the pleural cavity and diaphragm. The rib cage has seven pairs of true ribs and 5 pairs of false ribs. It protects the major vital organs within the thorax, and also assists in respiration. It also acts as attachment points for back, chest and shoulder muscles. The general identification of thorax is chest, which lies below the neck. It provides protection mainly to heart and lungs because malfunction in these two organs can cause sudden death. The intercostal muscles help in the motion of diaphragm present below the chest which is needed during expiration and inspiration.

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