All cells have a cell wall but only plant cells have a cell membrane

A) true
B) false
C) neither true or false

Answer: by being smart and pog and swag

Explanation:

Explanation:

The difference between the lower mantle and the oceanic crust is first their respective locations, pressure and temperature-- the pressure and temperature increases with depth in the earth this the mantle is more hot and under great pressure than the crust. hope this helps

The statement describes the main difference between the lower mantle and an oceanic crust is that the lower mantle experiences more pressure than the oceanic crust. Thus option C is correct.  

The lower mantle is the middle layer of the earth which lies in between the crust and the core. This is the middle layer of the earth in which the temp and pressure are so high because of the absence of air. The oceanic crust is the uppermost layer of the earth's crust in which marine plants grow.

The main difference between these two is that the mantle crust experiences more pressure than the oceanic crust because it is present in more depth. As we go in depth of the earth the temp and pressure arise because of the unavailability of oxygen.

So by reading this data the correct statement which exactly describes the difference between the mantle and the oceanic crust is statement C.

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Extracellular signals that are very large and hydrophilic typically cannot diffuse through the plasma membrane due to their size and hydrophilic nature. These signals include proteins such as growth factors and cytokines. Instead, these signals interact with specific receptors on the plasma membrane, triggering a series of intracellular events.

Upon binding to their receptors, these large hydrophilic signals can activate various signaling pathways within the cell. This can lead to the activation of secondary messengers, such as cyclic adenosine monophosphate (cAMP) or inositol triphosphate (IP3), which mediate intracellular signaling cascades.
Alternatively, some large hydrophilic signals can activate cell surface receptors, which in turn initiate a process called endocytosis. During endocytosis, the plasma membrane invaginates and forms a vesicle that engulfs the extracellular signal. This vesicle then internalizes and delivers the signal to the intracellular compartments, allowing it to interact with its target proteins and activate downstream signaling pathways.
In summary, extracellular signals that are large and hydrophilic typically enter the cell by interacting with specific receptors on the plasma membrane, which triggers intracellular signaling cascades or through endocytosis.

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Therefore, the correct answer is b. are made up of filter and suspension feeders living off the abundant plankton. Coral reef communities are made up of filter and suspension feeders living off the abundant plankton.

While coral polyps are a key component of coral reef communities, they are not the only organisms present. In addition to coral, coral reef communities are home to a diverse array of fish, invertebrates, and other organisms that rely on the reef for food, shelter, and other resources.

Many of these organisms are filter feeders or suspension feeders, meaning they capture plankton and other small particles from the water column. These organisms play a crucial role in the coral reef ecosystem by converting the energy from plankton into biomass that can be utilized by other organisms in the food chain.

Carnivorous animals are also present in coral reef communities, but they are not limited to this type of feeding strategy. Many organisms in coral reef communities are omnivorous or herbivorous, feeding on a variety of plant and animal material.

Efficient nutrient recycling is important for any ecosystem, but it is not a defining characteristic of coral reef communities. Nutrient cycling is largely driven by the microbial community and other decomposers, rather than by the organisms living in the reef itself.

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Answer:

the answer is yes hope this helped

Answer and explanation:

Chromosomal multiplicity, also known as polyploidy, is the name given to the cell or organism that has a numerical change in its whole set of chromosomes (for example, a triploid organism of a diploid species is a polyploid because it has an extra set of chromosomes than the rest of its species). Most species are diploids, but polyploidy is quite common in plants.

In agriculture, polyploidy can be beneficial by giving the plants better chances of survival and/or providing more desirable traits. Crop species such as bread wheat and triticale (a wheat and rye hybrid), for example, have 6 sets of chromosomes. Quinoa, coconut, and peanut are tetraploids (4 sets of chromosomes). Many of these cases of polyploidy in plants of importance for the agriculture field are a result of hybridization (which occurs when two different species are crossed in order to produce offspring with a combination of characteristics of the two-parent species).

The best evidence for the central idea is:

“Never having seen him, my mother could not know the portrait was heavily retouched.

Julia alvarez “ a genetics of justice “ is a novel about a young girl and her family living under a dictator with a totalitarian government in the dominican government.

In this novel you learn about her journey and how she becomes to be the women she is today .

Thus, Never having seen him, my mother could not know the portrait was heavily retouched.”

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Answer:

the answer is D

Explanation:

An organism that is heterotrophic, reproduces sexually, is multicellular, and does not have cell walls belongs to the kingdom of C. Animalia.

The Kingdom of Animalia is a huge phylum of eukaryotic, multicellular organisms that live in heterotrophic environments. As a result, they rely on outside sources for nutrients. Animal cells lack a cell wall, which is found in plant cells, despite the fact that they are unable to create their own food, which is one of the most distinguishing traits of plants.

The majority of animals, with the exception of a few, are motile, which helps them to successfully respond to stimuli and find food, among other things. In general, animals are separated into two groups: vertebrates (animals with a backbone) and invertebrates (animals without a backbone) (animals that lack a backbone).

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Some plants have extraordinarily lengthy roots, which enable them to draw water from a great depth below the Earth's surface. For insects to visit and aid in pollination, other plants have flowers that are the ideal shape.

The thick stems and leaves of plants are reservoirs for water. Animals are deterred from ingesting plant material by the spines. Photosynthesis is carried out by green stems on some plants. To shade the plant and reflect light, hairs on the leaves or stems are helpful.

In order for plants to have a better chance of surviving in their specific habitats, they have distinctive qualities called adaptations.

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If the members of one homologous pair did not segregate to opposite poles, but instead, both went to the same pole, then it would lead to trisomy.

A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's genetic code. The very long, thin DNA fibers in most chromosomes are covered with packing proteins; in eukaryotic cells, the histones are the most significant of these proteins.

DNA may be precisely duplicated during these cell divisions because of chromosomes.  

If the members of one homologous pair did not segregate to opposite poles, but instead, both went to the same pole, then it would lead to trisomy. Hence, two chromosomes lack chromosomes, while two chromosomes will have two copies of chromosomes.

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The independent variable of this experiment was the presence of macromolecules, the dependent variable was color change. Thus, test tube was the control variable  and was used as the comparison group to our tested experimental groups.

Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.

There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change.

Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.

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The tension in the rope is calculated as 33.7 N.

Weight of sled and fossil, w = 972 N Inclination angle of slope, θ = 19.8°

Speed of sled, v = 1.92 m/s

Coefficient of kinetic friction between sled runners and snow, μ = 0.107

To find:

Tension in the rope, T The forces acting on the sled are the gravitational force (Fg), the normal force (Fn) and the force of friction (Ff). The normal force is perpendicular to the slope and equal to the component of the gravitational force perpendicular to the slope. The force of friction is parallel to the slope and opposite the direction of motion.

The net force acting on the sled is given by the expression:

F net = ma

Since the sled moves with constant velocity, a = 0.

Therefore, F net = 0. F net = Fg sinθ - Ff = 0⇒ Fg sinθ = Ff

Since the speed of sled is constant, work done by tension in the rope is equal to work done by frictional force.

Hence, T = Ff = μFn

Where F n = Fg cosθ = w cosθ

Putting all the values,

T = μw cos θ sinθ= sin 19.8°cos 19.8°= 0.3365T = 0.107 × 972 × 0.3365T = 33.7 N

The rope is 33.7 N. The given problem is related to the tension in the rope. The tension in the rope is calculated as 33.7 N.

To bring down the fossil safely down the slope, the tension in the rope is 33.7 N. The gravitational force is acting perpendicular to the slope and the force of friction is acting parallel to the slope. The normal force is the component of gravitational force acting perpendicular to the slope. The sled moves down the slope with a constant velocity. The force acting on the sled is equal and opposite to the force of tension in the rope. The force of friction is given by the expression,

Ff = μFn,

where Fn = Fg cosθ = w cosθ.

Therefore, the tension in the rope is calculated as 33.7 N.

To bring down the fossil safely down the slope, the tension in the rope must be 33.7 N.

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In a membrane, the tail of the phospholipids in one monolayer face the tail of the phospholipids in the other monolayer.

Phospholipids are crucial for avoiding cell leakage. Phospholipid bilayers are essential to every cell in order to prevent molecule leakage through membranes. A cell's membrane is where the vast bulk of its phospholipids are found. The primary substance of the cell membrane is a phospholipid, a kind of lipid molecule. Lipids are a class of chemicals that include, among other things, waxes, certain vitamins, and fats. Two fatty acids, a phosphate group, and a glycerol molecule make up each phospholipid. Phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylserine are the four most prevalent phospholipids.

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Answer: B. Radiation emitted from the sun contains one type of electromagnetic wave .

Explanation:

Fix your meal times and stick to it. ...

Try to get the major nutrients from each meal. ...

Replace processed, packaged food with fruits, nuts, and fresh food.

Limit your fat intake to the percentage required. ...

Include more protein than starch in your

Answer:

See the answer below

Explanation:

All living things have certain characteristics. The genetic code carries the directions for inheritance, and offspring usually resemble their parents. With asexual reproduction, offspring have the same traits as their parents. With sexual reproduction, offspring differ from their parents in some ways. Living organisms use energy and materials to grow, develop, and reproduce. These life processes involve a set of chemical reactions called metabolic reactions. Organisms have means of detecting a change in their environment and responding to this stimuli. Most organisms require that their internal environments remain in a fairly constant range, and so they maintain homeostasis. The ability of a group of organisms to change, or evolve, over time is necessary for survival in an ever-changing environment.

Sexual reproduction involves crossing over of genetic materials between non-homologous chromosomes during gamete formation unlike in asexual reproduction. Hence, offspring from sexual reproduction differ from their parents to an extent while those from asexual reproduction are clones of their parents genetically.

Life is generally sustained by chemical processes known as metabolic reactions. Substances are constantly being formed (anabolic) and being broken down (catabolic) within the body of living organisms.

Organisms respond to stimuli in their environment. They are equipped with means to detect changes and act accordingly. Most living organisms are required to maintain a relatively constant internal environment. The process of doing this is known as homeostasis. Organisms need to constantly evolve in order to keep up with ever-changing environment.

The common garden experiment to study swimming activity levels in wood frog tadpoles might find a result that supports the hypothesis that swimming activity level is strongly controlled by genes (rather than being shaped by the environment) if there is a difference in swimming activity levels between the tadpoles from different ponds, even when they are raised under the same controlled conditions in lab aquaria.

This is because if the environment was the main factor influencing the tadpoles' swimming activity levels, then there would be no difference in swimming activity levels between the tadpoles from different ponds, as they are being raised in the same environment.In other words, if the tadpoles from one pond consistently show higher levels of swimming activity compared to the tadpoles from the other ponds, even under the same conditions in the lab, it would suggest that genetic factors are playing a strong role in determining swimming activity levels.

Overall, by comparing the swimming activity levels of the tadpoles from different ponds in a common garden experiment, researchers may be able to gain insights into the relative contributions of genetic and environmental factors in shaping swimming activity levels in wood frog tadpoles.

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Bending at the waist to either the left or right side is an example of the movement known as lateral flexion.

Flexion is a movement that decreases the angle between two body parts, while extension increases the angle. Abduction is a movement away from the midline of the body, while adduction is a movement towards the midline.
Lateral flexion involves bending the body to the side, such as when doing a side bend exercise or stretching the oblique muscles. It is important to maintain proper form and alignment when performing lateral flexion movements to avoid straining the back or neck muscles.Overall, understanding the different types of movements that occur in the body can help individuals perform exercises and activities safely and effectively.

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Bending at the waist to either the left or right side is an example of the movement called lateral flexion.

Lateral flexion occurs when you bend your waist sideways, allowing your trunk to move towards your hips. This movement engages the muscles around your spine and waist, providing stability and flexibility.
A. Flexion refers to the bending movement that decreases the angle between two body parts, such as bending your elbow.
B. Extension is the opposite of flexion; it's the movement that increases the angle between two body parts, such as straightening your elbow.
C. Abduction is the movement of a body part away from the midline of the body, like lifting your arm out to the side.
D. Adduction is the opposite of abduction; it's the movement of a body part towards the midline of the body, like bringing your arm down to your side after abduction.

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Answer:

d. Synarthrotic joints  

Explanation:  is correct for the choices offered.

The sensory receptors in the vestibular sacs enable us to maintain our sense of equilibrium by detecting the movement of fluid within them and transmitting this information to the brain. This helps us to stay upright, maintain balance, and navigate through our environment.

Sensory receptors in your vestibular sacs enable you to maintain your sense of equilibrium. The vestibular sacs are situated in the inner ear and are a vital component of the vestibular system that is responsible for maintaining balance and spatial orientation. These small, fluid-filled sacs contain tiny hair cells that are sensitive to the movement of the fluid as we move around.

The vestibular sacs consist of two small pouches, the utricle and saccule. The utricle is located horizontally, and the saccule is oriented vertically. They work together with the semicircular canals to provide sensory information to the brain that is necessary to maintain our balance and spatial orientation.

When we move our head, the fluid inside the vestibular sacs moves in response to the movement, causing the tiny hair cells to bend. This bending of hair cells generates electrical impulses that are transmitted to the brain via the vestibular nerve. The brain uses this information to determine the orientation of the body and the direction of movement.

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In this statement, the characteristic of life is growth, i.e the increase in number and size of cells.

Answer:

the digestive system help your body to gain the vitamins and minerals that it needs but breaking down the food that you eat. in your mouth you chew the food while salivas are makeing sure that the food sticks together and you are able to swalow it. when the food gets to stomach the acid in your stomach breaks do food down to vitamins minerals and waste. after ward the vitamins and minerals get in your body and the waste goes to intestines.

Explanation:

Answer:

Assuming this is a true/false question, the answer would be false.

If a predator only preyed on one species, it would be at a disadvantage if the prey it feeds on gets wiped out in that region.

Therefore, your answer is False.

Electronic waste and chemicals may be converted into fossil fuel after being buried under pressure for a long period of time.

A fossil fuel is a substance that is extracted and burned as a fuel and has hydrocarbons in it, like coal, oil, and natural gas. Fossil fuels are formed naturally in the Earth's crust from the remains of dead plants and animals.

Decomposing animals and plants are what are used to make fossil fuels. Carbon and hydrogen can be burned to produce energy from these fuels, which can be found in the crust of the Earth.

They extract carbon-rich deposits and burn them to generate energy. They currently provide approximately 80% of the world's energy and are non-renewable. They are also used to make steel, plastic, and a lot of other things.

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Answer:

Evergreen forests are forests in which trees have green leaves all year round, while coniferous forests consist of trees that grow pines or cones instead of leaves.

Explanation:

Most coniferous trees are actually evergreen, however not all evergreen trees are coniferous. Hence, there is the difference.

Hope this helped!