Select the most complete model that shows the cellular structures present in all living cells.

Answer:

TRUE

Explanation:

To an evolutionary biologist, fitness simply means reproductive success and reflects how well an organism is adapted to its environment. ... Organisms which are better suited to their environment will reproduce more and so increase the proportion of the population with their traits.

The best option that describes the role of the small intestine in digestion is (C) it helps in the absorption of nutrients from food.

The small intestine is a vital part of the digestive system, and its main role is to facilitate the absorption of nutrients from the food we eat. After food is partially digested in the stomach, it enters the small intestine, where it is broken down further by enzymes secreted by the pancreas and bile from the liver.

The walls of the small intestine are lined with small finger-like projections called villi, which greatly increase the surface area available for nutrient absorption.

As food passes through the small intestine, nutrients such as carbohydrates, proteins, and fats are absorbed through the villi and into the bloodstream, where they can be transported to the cells throughout the body to be used as energy or for other purposes.

In addition to nutrient absorption, the small intestine also plays a role in the digestion of carbohydrates and proteins, and it helps to regulate the release of digestive enzymes and hormones.

Overall, the small intestine is a crucial component of the digestive system, and its proper functioning is essential for maintaining good health and well-being.

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Answer:

sorry i cant understand clearly

Explanation:

i hope its help more

Answer: The equipment will "push back" on the astronaut with the same amount of force.

Explanation: Newton's third law of motion can be summed up as "For every action, there is an equal and opposite reaction." This means that when the astronaut applies force to push the object, that object will apply an equal amount of force to the astronaut.

Answer:

A

Explanation:

I just aced the quiz

Answer

celleys

Explanation:

i just think it wouldve been creative

Answer:

Air pollution harms human health and the environment. In Europe, emissions of many air pollutants have decreased substantially over the past decades, resulting in improved air quality across the region. However, air pollutant concentrations are still too high, and air quality problems persist. A significant proportion of Europe’s population live in areas, especially cities, where exceedances of air quality standards occur: ozone, nitrogen dioxide and particulate matter (PM) pollution pose serious health risks. Several countries have exceeded one or more of their 2010 emission limits for four important air pollutants. Reducing air pollution therefore remains important.

Air pollution is a local, pan-European and hemispheric issue. Air pollutants released in one country may be transported in the atmosphere, contributing to or resulting in poor air quality elsewhere.

Particulate matter, nitrogen dioxide and ground-level ozone, are now generally recognised as the three pollutants that most significantly affect human health. Long-term and peak exposures to these pollutants range in severity of impact, from impairing the respiratory system to premature death. Around 90 % of city dwellers in Europe are exposed to pollutants at concentrations higher than the air quality levels deemed harmful to health. For example, fine particulate matter (PM2.5) in air has been estimated to reduce life expectancy in the EU by more than eight months. Benzo(a)pyrene is a carcinogenic pollutant of increasing concern, with concentrations being above the threshold set to protect human health in several urban areas, especially in central and eastern Europe.

"Air pollution is causing damage to human health and ecosystems. Large parts of the population do not live in a healthy environment, according to current standards. To get on to a sustainable path, Europe will have to be ambitious and go beyond current legislation."

Explanation:

Answer:

Explanation:

During sexual reproduction, meiosis generates genetic variation in offspring because the process randomly shuffles genes across chromosomes and then randomly separates half of those chromosomes into each gamete. The two gametes then randomly fuse to form a new organism.

True. Things such as a sponge, placozoa and stuff can be unicellular. But other bigger animals are multicellular, like a whale or dog.

Answer:true

Explanation:

Answer:

An eclipse is an astronomical event that occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer. This alignment of three celestial objects is known as a syzygy

Explanation:

Answer:

An eclipse is an astronomical event that occurs when an astronomical object or spacecraft is temporarily obcured.

Answer:

D

Explanation:

Answer:

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. ... Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.

Explanation:

Answer:

C

Explanation:

ecosystem is living AND non living things

The best definition of an ecosystem is option C: "A system formed by the interactions of living organisms with the nonliving physical environment."

An ecosystem is a community of living organisms, such as plants, animals, and microorganisms, interacting with each other and their nonliving environment, including the atmosphere, soil, and water.

This interaction creates a functional system that can be characterized by energy flow and nutrient cycling. The other options are not accurate definitions of an ecosystem, as ecosystems involve both living and nonliving components, and the interactions are not limited to a single species.

Ecosystems are not isolated, and they can interact with other ecosystems. For example, rivers and streams can transport nutrients and organisms downstream, connecting different ecosystems such as a forest and a freshwater system. Similarly, the atmosphere can transport pollutants and other materials across vast distances, affecting ecosystems far from their source.

In summary, an ecosystem is a complex, interconnected system where living organisms interact with each other and the non-living components of their environment. Understanding the functions and interactions within ecosystems is critical to developing effective management strategies for conserving biodiversity and maintaining the ecosystem services that humans depend on.

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Answer:

B

Explanation:

Its the same

Answer:

flexion - depression

extension - elevation

adduction - medial rotation

abduction - lateral rotation

Explanation:

Flexion is the process of bending an arm or leg. It occurs as a result of the contraction of the muscles. Depression is a downward movement. Hence, flexion refers to the depression of an arm or leg.

Extension is the process of stretching the body parts. Elevation is an upward movement. Hence, extension refers to the elevation of body parts.

Adduction is the movement of a limb or other part of the body towards the midline or another part of the body. The movement of the limb towards the midline of the body is known as medial rotation.

Abduction is the movement of a limb or other part of the body away from the midline of the body. The movement of the limb away from the midline of the body is known as lateral rotation.

Answer:

Answer below !

Explanation:

1. Cell's

2. Tissue's

3. Organ's

4. Organ system

5 . Organism's

Explanation:

There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. Dandelion seeds float away in the wind

Answer:

I. Overall magnification (TM) = x40

II. Overall magnification (TM) = x100

III. Overall magnification (TM) = x400

IV. Overall magnification (TM) = x1000

Explanation:

A microscope can be defined as an optical device that is typically used to make an enlarged (magnified) image of a minute (small) object and as such reveals all the little information about the object that cannot be seen by the natural human eye.

Mathematically, the overall (total) magnification of a microscope is given by the formula;

Overall magnification (TM) = Eyepiece magnification(EM) X Objective magnification (OM).

I. When EM = x10 and OM = x4

TM = EM * OM

TM = x10 * x4

TM = x40

II. When EM = x10 and OM = x10

TM = EM * OM

TM = x10 * x10

TM = x100

III. When EM = x10 and OM = x40

TM = EM * OM

TM = x10 * x40

TM = x400

IV. When EM = x10 and OM = x100

TM = EM * OM

TM = x10 * x100

TM = x1000

Answer

A

Explanation:

that is the cell membrane it is used specifically for that reason, to help good things get it and to keep bad things out

Answer:

Pyrimidine

Explanation:

This is because pyrimidine are one of the two types of heterocyclic nitrogenous bases of RNA and DNA. They include uracil, cytosine and thymine in RNA. They have single structure and have nitrogen at position 1 and ring at 3. Pyrimidine are present in Vitamins such as ribloflavin, folic acid and thiamine. Pyrimidine derivatives have characteristics that are antiviral, antibacterial, antifungal, sedative e.t.c.

Answer:

D) Angiosperm

Explanation:

I hope this helps :) Tell me if I am wrong

Answer:

100% white cows if i understand what theyre asking for

Explanation:

Answer:1d2c3b4a

Explanation:

Benefits of selective breeding:

Variation

Longer life span for bred animals

Less harm to surrounding organisms (for example, humans)

More food (plant breeding)

Faster growth (plant breeding)