Can someone help me?

Answer:

help hurry someone anyone

Explanation:

Answer:

round is better then flat.

Explanation:

Bc, if it was flat it would eather be day or night all day.

If it was round the world dose not does not go in a circle or it would be flat.

Thats why the core of the wrld spins us not in a circle.

Answer:

thinking positive and solve generally

Phagocytosis is an example of endocytosis which occurs in cells during the intake of large particles or food. Endocytosis is a type of active transport, in which the cell membrane invaginates around the extracellular material, thus enclosing it within the cell.

The cell membrane then forms a vesicle, which is subsequently transported within the cell. Phagocytosis is a process in which specialized cells known as phagocytes engulf and destroy pathogens or other particles in an organism. Phagocytes use their long projections to surround the particle, and then take it inside the cell. The particle is then enclosed within a vesicle, and is fused with lysosomes to be degraded and destroyed.

The other options mentioned in the question are incorrect. Exocytosis involves the movement of materials from inside the cell to outside. Facilitated diffusion is the transport of molecules across a cell membrane with the help of membrane proteins.

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Answer:

all of the above is the right answer

Answer:

cycles, equilibrium, change, models, scientific method

Explanation:

Dural venous sinuses differ from veins in various ways. Unlike veins, they lack the typical arrangement of three layers in their walls. This is due to the fact that they are covered by the meningeal layer of the dura mater, which provides them with an additional layer and increases the strength of their walls.

Additionally, they do not possess any valves like veins do, as their function is primarily passive. Because of their position, they do not need to return blood to the heart. They have thin walls, like veins, but are larger in diameter and can be tortuous in nature.

Furthermore, the flow of blood through dural venous sinuses is often slower than it is in veins because of their wide lumens. In contrast to veins, dural venous sinuses are also lined with endothelium, which is continuous with the meninges, and do not have smooth muscle or elastin fibers, which help to maintain venous blood pressure.

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Answer:

The cell membrane is semipermeable because allows only certain molecules to pass through.

Explanation:

Semipermeability is a common property of cell membranes, due to their predominantly lipid composition, which gives them a hydrophobic character.

The cytoplasmic membrane is constituted by a double layer of lipids, in addition to structural proteins and glucides, which prevent the entry of polar or charged molecules. This characteristic allows lipids and small molecules without charge to pass freely through it.

Regarding the other options:

    A. Cell membranes are associated with lysosomes, structures that contain enzymes. However, this characteristic is not related to semipermeability.

    C. They allow the passage of small molecules - devoid of charge - through them.

    D. Not all non-polar molecules pass through, as some need a transporter.

Answer: B it only allows certain molecules to pass through

Explanation: permeability is the ability to let molecules pass through, and semipermeable only allow certain molecules through.

Answer:

1) Make an observation that describes a problem,

2) Create a hypothesis,

3) Test the hypothesis

4) Draw conclusions and refine the hypothesis.

The basic steps of the scientific method are: 1) make an observation that describes a problem, 2) create a hypothesis, 3) test the hypothesis, and 4) draw conclusions and refine the hypothesis.

Answer:

A. The Organism.

Explanation:

A human is made up of all human organ systems. cells are made up of molecules, tissues are made up of cells, and organs are made up of tissues.

Answer:

1.975g

Explanation:

If you cut the block into 4 equal pieces, then: 7.9÷4 = 1.975g

Perception refers to the process of transforming stimulus energy into neural impulses. It is a complex process that involves a variety of steps.

Correct option is A.

This includes transduction, the process by which physical energy is converted into neural energy, and both bottom-up and top-down processing, the cognitive and perceptual processes by which information is input and used to interpret an environment. Bottom-up processing relies on sensory details taken from the environment, while top-down processing relies on past experiences and expectations to interpret sensory details.

This process is also underpinned by psychophysics, which is the study of how physical signals are perceived by an organism. Therefore, all of the steps involved in the transformation of stimulus energy into neural impulses are encompassed within the concept of perception.

Correct option is A.

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Answer:

D. The mitotic spindle draws the duplicated chromosomes to the opposite ends of the cell followed by the formation of a septum and two daughter cells.

Explanation:

I took the quiz I got a 100%

The statement about binary fission 'the mitotic spindle draws the duplicated chromosomes to the opposite ends of the cell followed by the formation of a septum and two daughter cells' is FALSE.

Binary fission refers to an asexual mode of reproduction by which an organism separates a part of its body (usually a cell) to create two new bodies.

Binary fission represents the most common mode of asexual reproduction and occurs primarily in prokaryotes.

In binary fission, a parent cell divides to produce two genetically identical daughter cells.

During binary fission, there is no mitotic spindle formation within a cell nucleus.

In conclusion, the statement about binary fission 'the mitotic spindle draws the duplicated chromosomes to the opposite ends of the cell followed by the formation of a septum and two daughter cells' is FALSE.

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Answer:

Extinct

Explanation:

Answer:

Mycoplasma

Explanation:

Mycoplasma is the smallest cell

In species of fish where combat for females is prevalent, sexual selection is driven by male-male competition for access to females. These types of sexual selection are thought to be responsible for a variety of sexual dimorphisms in fish, such as differences in body size, shape, coloration, and ornamentation.

Male fish that win aggressive encounters with other males are often larger, stronger, and more aggressive than their rivals. These traits are thought to be advantageous in the context of sexual selection because they increase the likelihood of successfully competing for access to females.

In some species, males will also exhibit elaborate courtship behaviors or produce acoustic or visual signals to attract females or deter rivals.

These types of adaptations are thought to increase the likelihood of successful reproduction by attracting females to the male's territory or by deterring rivals from approaching.

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Based on the options provided, glucose (c) and K+ (a) can diffuse across the dialysis tubing, while starch (b) cannot.

Glucose is a small molecule that can pass through the pores of the dialysis tubing, allowing it to diffuse across the membrane.

K+ is a small ion that is also able to diffuse through the membrane. On the other hand, starch is a large molecule that is unable to pass through the pores of the dialysis tubing and therefore cannot diffuse across the membrane.

The ability of molecules to diffuse across a membrane depends on factors such as size, charge, and the permeability of the membrane.

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Answer:

carbon dioxide,oxegyn

Explanation:

in the lungs,the blood gives up__carbodioxide___ and picks up ____oxygen___.

Answer:

yes

Explanation:

almost everyhting in our bodies have a part of our dna

Answer:

yes

Explanation:

white blood cells have DNA but red blood cells dont due to the lack of nuclei.

Answer: the prairie is a place where many herbivores live

Explanation:

I got it right

Answer:

Reproduction is vital to the success of a species.

explain:

For a species to survive it must be able to produce more offspring than it loses though old age, disease, and predication. Living things can reproduce in different ways, asexual reproduction and sexual reproduction.

Answer:reproduction is important for the survival of living things it is also vital for success of a species

Explanation:without a mechanism for reproduction life would come to and end

Fecundity can be defined as the number of offspring produced by an individual or population.

In this case, we need to find the fecundity of the bird population given the number of viable offspring produced by each of the 10 females.

We can do this by adding up the number of viable offspring produced by all the females and then dividing by the number of females.

That is, Fecundity = (5 + 3 + 1 + 2 + 0 + 6 + 0 + 0 + 2 + 5) / 10

Fecundity = 24 / 10

Fecundity = 2.4

Therefore, the fecundity of this bird population this year was 2.4.

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The statement "dogs do not get measles because their cells lack the correct receptor sites for that virus" is true. Measles is a virus that affects humans and primates, but not dogs. The reason why dogs do not get measles is because their cells do not have the receptors that are necessary for the virus to enter and replicate within their bodies.

Receptor sites are specific areas on the surface of cells that allow viruses to bind and enter the cell, initiating the infection process. If a virus cannot find the right receptors on a cell, it cannot enter and replicate within that cell. In the case of measles, the virus can only infect humans and primates because their cells have the necessary receptors.

Dogs are not completely immune to all viruses, but they are affected by different types of viruses than humans. For example, dogs can get canine distemper virus, which is a highly contagious virus that can cause serious illness and death in dogs. However, canine distemper virus cannot infect humans because their cells lack the necessary receptors.

In conclusion, it is true that dogs do not get measles because their cells lack the correct receptor sites for that virus. This is due to the fact that dogs and humans have different types of cells with different surface receptors, which make them susceptible to different types of viruses.

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Answer:plasma membrane

Explanation:

Answer:

An enzyme is a protein molecule that can catalyze the chemical reaction in living organism or any system. It increases the rate of the chemical reaction by lowering the energy of activation which is required to reach threshold to initiate the reaction.

Active site is the surface region of an enzyme which is specific to substrate and bind to its substrate to catalyse the reaction and remain unchanged after the product formation in the reaction.

When the temperature increase the rate of reaction and catalytic activity increases as well but after a limit it can denature the 3D structure of the protein as hydrogen bonds breaks in the process which leads to losing its biological properties. When the temeprature decreases the rate of catalyse activity decreases.

It should be noted that an enzyme refers to a protein molecule that can be used to catalyze the chemical reaction in a living organism.

An enzyme increases the rate of the chemical reaction as it lowers the energy of activation that is required to reach the threshold to initiate the reaction. The active site of an enzyme is specific to substrate and bind to its substrate to catalyze the reaction and remain unchanged after the product formation in the reaction.

It should be noted that when the temperature brings about an increase in the rate of reaction, it leads to an increase in the catalytic activity but after a limit, it can denature the 3D structure of the protein due to the fact that hydrogen bonds break in the process which then brings about the loss of its biological properties.

In conclusion, a decrease in temperature will lead to a reduction in the rate of catalyze activities.

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The process that is not common during the post-absorptive state is glucose catabolism.

The post-absorptive state, which is also known as the fasting state, refers to the period after food consumption has ceased. During the post-absorptive state, energy must be derived from stored macronutrients in order to maintain blood glucose levels and support other physiological processes. Glucose catabolism is a process in which glucose is oxidized in order to produce energy, which is utilized to carry out cellular processes.

This process typically occurs in the presence of oxygen, and is known as aerobic respiration. In the post-absorptive state, glucose levels decrease and the body relies on alternative sources of energy, such as fatty acids and ketone bodies, which are produced via ketogenesis. Thus, glucose catabolism is not common during the post-absorptive state as glucose levels are low and the body must rely on other sources of energy.

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The surface area-to-volume ratio of cells determines the rate at which molecules diffuse across the membrane. Simple squamous cells would be best suited for lining the alveoli of the lungs, where diffusion of carbon dioxide and oxygen must occur very rapidly, according to the data.  So, the correct option is a. Simple squamous cells.

The surface area-to-volume ratio of the simple squamous cell is 9. The ratio of surface area to volume is critical since it determines how fast molecules diffuse across the membrane. A high surface area-to-volume ratio allows for quick diffusion of gases such as oxygen and carbon dioxide, which are exchanged in the alveoli of the lungs.

Simple squamous cells are thin and flat, and their function is to facilitate diffusion. The cells in the walls of the alveoli, where gases are exchanged, are simple squamous cells.

Therefore, it is the simple squamous cells that would be best suited for lining the alveoli of the lungs where diffusion of carbon dioxide and oxygen must occur very rapidly.

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