Can someone help me with this? My teacher just gives us papers to full out and doesn't teach at all.

the  heart is an organ that pumps blood throughout the body of  the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes

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The primary function of our heart is pumping the blood throughout our body. The circulatory system plays a crucial role in providing the body with the oxygen needed by cells.  Oxygen gets from the lungs to the body's cells by attaching to hemoglobin in the red blood cells, which are carried around the body in blood vessels along with blood. Oxygen diffuses across capillary cell membranes into cells, where it is taken into the mitochondria and used as a hydrogen acceptor during the production of ATP to produce water.

Answer:

Topsoil can be wasted by deforestation. The origins of the trees manage to keep the soil in position. Striking down trees can cause the topsoil more unsafe to erosion.

Explanation:

Many of the items we take for awarded food, paper, and cotton have a primary relationship to the soil. Vegetables, grains, and cotton grow from seedlings, livestock such as animals feed on pastures, and paper come off trees. Plants grasses, and trees all raise in the soil. Without soil, we cannot produce food or grow livestock or manufacture paper or other goods we need.

The erosion of the land can make it fade away.

Answer is: each base can attch to only one other type of base

Answer: Option D

Explanation: The DNA replication is the process by which one DNA makes exact copies of it during the cell division.

The double stranded DNA is first uncoiled and then, new complementary strand gets added to it and attachment of the nucleotide bases to one another also takes place.

The attachment of bases to one another is complementary which means that the adenine will always combine with thymine and guanine always pairs with the cytosine.

This complementary binding of base pairs prevents error in DNA replication.

A cross between two different lines and/ or genes that differ in two observed traits.

Dihybrid cross is a cross between two different genes that differ in two observed traits.

The remains of Hadrosaur is an example of a body fossil.

Fossils can provide crucial observations about an organism's physical attributes, their age, and their place in the evolutionary history of species. These observations contribute to our understanding of the organism's lifestyle and the environmental conditions from the past.

One observation that could be made about a fossil is its physical attributes such as the shape, size, and complexity of teeth, bones, or shell imprints. These features can help identify the species the fossil belonged to and offer insights into the organism's lifestyle. For example, numerous shells of bivalves, chips of corals, or a partial imprint of a trilobite found in a farmland rich in calcium carbonate would suggest the area was once underwater, possibly a coral reef environment.

Another observation that can be made is the fossil's age. By determining the fossil's age through methods such as radiometric dating, scientists can figure out when the organism lived and establish a timeline for the evolution of different species.

Thirdly, fossils can provide evidence for the concept of evolution and common ancestry. For instance, similarities in the morphology of different species, such as the whale flipper and bird and mammal appendages, indicate that these species share a common ancestor.

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Lipids are NOT made of nucleotides. Nucleotides are the building block for nucleic acid, if that answers your question.

i believe in that situation water would move into the cell

Answer:

false

Explanation:

The adhesive properties of water are illustrated by observation D: 'the water surface forming a U-shape inside a glass tube'. This is because of water's ability to 'stick' to other substances such as the walls of a tube, leading to the creation of a U-shape. The correct option is D.

The direct observation that illustrates the adhesive properties of water would be option D: 'the water surface forming a U-shape inside a glass tube'.

The adhesive properties of water refer to its ability to stick to other substances. In this case, the adhesive behavior is evident when water 'sticks' to the walls of the tube, creating a U-shape due to the surface tension. This phenomenon is especially observable when dealing with a narrow tube, a scenario referred to as capillary action.

Water's strong adhesion properties are primarily due to its polar nature, allowing water molecules to interact with different surfaces effectively.

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Answer: Genocide – the systematic extermination of an entire national, racial, religious, or ethnic group.

Explanation:

Genocide is the deliberate organization and act of killing a group of people based on their race, culture, or ethnicity.

Genocide includes violent attacks with the specific intent to destroy, in whole or in part, a national, ethnic, racial, or religious group. There is Federal jurisdiction if the offense is committed within the United States.

Genocide was first recognised as a crime under international law in 1946 by the United Nations General Assembly (A/RES/96-I). It was codified as an independent crime in the 1948 Convention on the Prevention and Punishment of the Crime of Genocide (the Genocide Convention).

Genocide's “intent to destroy” separates it from other crimes of humanity such as ethnic cleansing, which aims at forcibly expelling a group from a geographic area (by killing, forced deportation and other methods).

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Answer:

Part of Cell Theory:

Not Part of Cell Theory:

Expalanation

The postulates of cell theory are developed over the centuries which are now universally accepted. These are mentioned above. Although the other three statements are also correct but they are not the part of cell theory.

Answer:

Part of Cell Theory:

All living organisms are made of cells.

Cells are the basic unit of structure and function in living things.

Cells arise from previously existing cells.

Not Part of Cell Theory:

All cells have DNA or other genetic material.

Cells can be classified as prokaryotic or eukaryotic.

Cells use energy to sustain life.

Answer:

Redi denied spontaneous generation.

Explanation:

Spontaneous generation leads to an antiquated body of opinion on the regular production of breathing organisms without falling from related organisms. The theory of spontaneous generation held that breathing beings could appear from nonliving interest and that such methods were common and usual.

Final answer:

Redi's experiment demonstrated that maggots form on meat only when flies can lay eggs, refuting the theory of spontaneous generation and showing that life comes from life.

Explanation:

Francesco Redi's Experiment on Spontaneous Generation

Francesco Redi's experiment, conducted in the 17th century, was a milestone in refuting the concept of spontaneous generation. Redi's setup involved placing meat in three different containers: one open to air, one sealed with a cork, and one covered with gauze. The results showed that maggots only developed on the meat in the open container, suggesting that maggots were not spontaneously generated but were rather the offspring of flies. This was further confirmed as no maggots were found in the sealed or gauze-covered containers.

Redi's experiment thus summarized that maggots only appeared on the meat if flies had access to lay their eggs on the meat. This finding was crucial in challenging the prevailing notion of the time that life could spontaneously arise from nonliving matter. Redi's work laid the foundation for later scientists like Lazzaro Spallanzani and Louis Pasteur, who provided further evidence against spontaneous generation, leading to the current understanding that life arises from life.

Answer:

Phospholipids  

✔ structure of cell membranes

Explanation:

Phospholipids are crucial for the formation of cell membranes, where they arrange in a bilayer due to their amphiphilic nature. They separate the cell's interior from the external environment and facilitate various cell functions. Phospholipids are not related to the ring structure of steroids but are essential for the plasma membrane's structure and function.

Phospholipids in Cell Membranes

Phospholipids are critical components of cell membranes. They are amphiphilic molecules consisting of hydrophobic fatty acid tails and a hydrophilic phosphate group head. This unique structure allows them to form a bilayer in aqueous environments, which is fundamental to the function of the plasma membrane of cells. Phospholipids ensure that the cell membrane is semi-permeable, enabling it to regulate the entry and exit of substances, thereby maintaining homeostasis within the cell. Cholesterol, another lipid molecule, is interspersed between the phospholipids in the membrane, where it helps modulate fluidity and stability.

Unlike steroids, which are composed of a ring structure, phospholipids are not part of that structure but are instead chiefly involved in forming the lipid bilayer of cellular membranes. To summarize, phospholipids are fundamental for creating the barrier that separates the internal contents of the cell from the external environment and also play a role in cell recognition, signaling, and energy use.

The answer is the first one "discharge".

Answer:

Discharge

Explanation:

The right matches are:

Freshwater Circadian  ==> have a cell nucleus and organelles

chemoautotrophic bacteria  ==> produce food from inorganic materials

heterotrophic anaerobic archaea ==> cannot survive in the presence of oxygen.

The freshwater species are eukaryotes, so they systematiquently contain a nucleus and organelles.

An anaerobic organism is able to live and grow in an oxygen-free environment, but can not survive in an oxygenated environment because oxygen is toxic to it.

Chemoautotrophy is the trophic type of a living organism that produces its organic compounds without the aid of light as a source of energy (chemotrophy) and a source of mineral carbon (autotrophy). The body gets its energy by oxidizing inorganic substances such as sulfur and ammonia. This group is a subdivision of chemotropes and autotrophs.

Answer:

Freshwater Circadian  ==> have a cell nucleus and organelles

chemoautotrophic bacteria  ==> produce food from inorganic materials

heterotrophic anaerobic archaea ==> cannot survive in the presence of oxygen.

Explanation:

they all are made from some type of mineral

The physical property that they all have in common is they are are solid form of matter.

A physical property is basically a property of matter that is not usually related to alteration in its chemical composition.

Density, color, hardness, melting and boiling points, and electrical conductivity are all examples of physical properties.

Solids are distinguished by their structural rigidity and resistance to changes in shape or volume.

A solid object, unlike a liquid, does not flow to take on the shape of its container, nor does it expand to fill the entire volume available to it, as a gas does.

Physical properties are typically detectable with your senses. The state of matter is one of the physical properties of matter. The states of matter are liquid, solid, and gaseous.

Thus, this is the common point among the given materials.

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1. Photosynthesis refers to the procedure by which plants and some other species utilize the energy in the form of sunlight to generate glucose from carbon dioxide and water. The chlorophyll present in the leaves captivates the light energy needed to form glucose. As chlorophyll is green, so it absorbs the blue and red parts of the electromagnetic spectrum and reflects the green part of the spectrum.  

2. Hydrocarbons are the organic components, which are formed of only carbon and hydrogen atoms. They are found in various places, like natural gas and crude oil.  

3. A single molecule of phospholipid exhibits a phosphate group on one end known as the head and the two side by side chains of fatty acids, which forms the lipid tails. The phosphate group is charged negatively, forming the head polar and hydrophilic, or water-loving.  

4. All the amino acids are bonded together to form long chains, the bond is known as a peptide bond. In an amino acid, the alpha carbon is bound with a hydrogen atom as well as a unique side chain, or R group. Each of the 20 amino acids differentiates from each other due to the presence of the unique R group, or the side chain.  

5. All the proteins comprise an element, nitrogen, which is not found in any carbohydrates or fats, and some proteins also exhibit sulfur.  

It is one of the four layers that surround earth the other three are rock, water, air.

Well that would be rocks without metal because in space the asteroids are metal (on earth too) but here we have an abundance of nonmetals and life forms too!

The most important differences between a transmission electron microscope and a scanning electron microscope are: Rather than the broad static beam used in TEM, the SEM beam is focused to a fine point and scans line by line over the sample surface in a rectangular raster pattern

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The results of transmission and scanning electron microscopy differ in a number of ways: Resolution, contrast, depth of field, image appearance.

Resolution: resolution of transmission electron microscopy (TEM) is greater than that of scanning electron microscopy (SEM). As a result, TEM can produce more detailed images of the sample.

Contrast: The way electrons interact with the sample creates contrast in TEM images. The contrast in SEM images is caused by the way electrons are scattered by the sample.

Depth of field: In TEM images, the depth of field is very shallow. This means that at any given time, only a small section of the sample is in focus. SEM photos have a significantly higher depth of field.

Image appearance: TEM images are often displayed as two-dimensional projections of the sample. SEM pictures are typically three-dimensional representations of the material.

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Answer: Some species will develop adaptations to survive in the deforested land.  

Some populations will migrate out of the deforested area.

Explanation:

The deforestation is the process of clear cutting of the trees or removal of plants and trees species so as to obtain the land, use the wood for commercial purposes and for other needs.

In the given situation, the two most likely effects of the deforestation on the ecosystem will include:  

Some species will develop adaptations to survive in the deforested land. : As species may find the environment different after the construction of the road. They may develop adaptations in the changing condition with the passage of time. They will not adapt instantly.

Some populations will migrate out of the deforested area. : Some species will not find the habitat suitable for their survival therefore, they will migrate from the area so as to sustain their life at another location.

When a forest is cleared to build a road, the deforested land will no longer support large trees, some species will develop adaptations to survive in the deforested land, and some populations may migrate out of the deforested area.

The most likely effects on the ecosystem when a forest is cleared to build a road are:

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Answer:

of galaxies.

Explanation:

have a good 2023 year

The universe is composed of about 100 billion galaxies grouped into various structures ranging from small groups to large clusters and vast superclusters.

These galaxies, along with stars, gas, dust, and dark matter, are woven into filamentary structures that create a cosmic web, stretching across the universe. The formation of these structures adheres to the cosmological principle, indicating that the universe is homogeneous on a large scale, with galaxy clusters and superclusters residing mostly along the filaments, surrounded by immense voids.

Furthermore, our own Milky Way Galaxy is part of the Local Group, and it alone contains around 100 billion stars, some of which are likely to host planetary systems and, by extension, potentially intelligent life.

Therefore, the universe is composed of about 100 billion galaxies, which group together in various structures ranging from small groups to large clusters and vast superclusters.

it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division).

Hope this helps!

Answer:

Plant and animal cells have a plasma membrane, a nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, peroxides, and micro-tubules.

Explanation:

Both animal and plant groups have few alike structural elements. Leading off, they are both eukaryotic, which indicates they have a specified nucleus. The nucleus comprises chromosomes. It is guarded and enclosed by the cytoplasm, which is a wet or gel-like liquid. Animal and plant cells own a cell membrane that encloses the cell.

The similarities between the kingdom of Animalia and the kingdom of Plantae include the following:

- Growth and animals have eukaryotic cells.

- Plants and animals have a body composed of many cells that have differentiated to form tissue.

Scientific classification is a way for biologists to classify and categorize species from extinct and living organisms. Modern classifications are rooted in the system of Carolus Linneus, which groups species according to the similarity in physical properties of living things. This grouping has been revised and developed since Carolus lived to maintain consistency with the general principle inherited from Darwin.

Classification is a way of sorting and grouping living things into specific groups or units. The order of classification of living things from the highest level to the lowest is Domain, Kingdom, Phylum or Phylum (animal) / Divisio (plant), Classis, Order, family, Genus, and Species.

The benefits of the classification of living things are that it makes it easier for us to study living things that are very diverse and also to find out the kinship between living things with one another.

Initially, the experts only grouped living things into 2 kingdoms, namely the plant kingdom and the animal kingdom. But in 1969 Robert H. Whittaker grouped living things into five kingdoms, namely Monera, Protista, Fungi, Plantae, and Animalia. This grouping is based on the composition of cells, the way living things meet their food and the level of living things. Then this system was changed by splitting kingdom monera into kingdom Eubacteria and Archaebacteria. And finally the grouping of living things into six groups.

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Class: Middle School

Subject: Biology

Keywords: Scientific Classification, Equation of Plantae kingdom the Animal Kingdom.

The cane toad is an invasive species