why mammal embroys and dinosaur embroys have placodes

Answer:

is the chemical change because the identity of the dead plants or animal does not change

Answer: Option B

Explanation:

The process of decomposition can be defined as the process in which the body of the organism is broken down  from complex substances to the simpler substances.

The process is a part of the nutrient cycle is essential because the nutrients needs to be recycled in order to be available for the plants and other species.

The body starts decomposing after the death of the organism. It is a chemical change in which the complex form of the body is converted into simpler form.

Answer:

The cell contains many organelles whose primary job is to either control what goes in and out of the cell or to control the influx and out-flux of certain materials that can potentially change the environment of the cell. These organelles are listed below:

Explanation:

A stable environment is paramount to the proper functioning of a cell. The regulation of the cells' internal environment to keep it stable is termed as homeostasis. Cell organelles perform varied functions to stabilize the cell's environment:

The cell membrane is the outer covering of the cell that serves as semi-permeable barrier against the extracellular environment. Being a semi-permeable barrier, the cell membrane only allows specific substances to enter the cell.

Apart from being the power house of the cell, mitochondria also play an active role in homeostasis. Mitochondria detect nutrient levels in the cytoplasm; they are also involved in lipid catabolism.

Autophagosomes aid homeostasis by degrading and getting rid of harmful substances such as old/damaged organelles, pathogens, protein aggregates and storage nutrients such as lipid droplets. Autophagosomes deliver these harmful substances to lysosomes. Lysosomes are the cell's principal recyclers. They digest the lethal substances and export their remains outside the cell.

Apart from these, there are other organelles that indirectly contribute to homeostasis:

Answer:

Many ways. For one, we refine oil to make diesel to power semi trucks to take our goods long distances having the sophisticated logistics network that we do. We use jet fuel based on oil to fly us places that would otherwise take days to get to, in hours. We use geothermal heat, coal, and natural gas for electricity to power just about everything that uses electricity. We use this electricity to power air conditioning (very comfortable). Trees to make homes. We use everything for everything. Anything that makes your life comfortable was made from a resource on Earth. That's the simplest way to put it.

Explanation:

Facts.

Answer:

they make peoples lives more comfortable by not having all these chemicals in the food and being more healthy

Explanation:

explained up there

Answer:

liquid- enzymes

protein- fat

carbohydrate- saccharides

nuclei acid- dna or deoxyribonucleic acid

Cancer cells are less likely than normal cells to undergo _apoptosis______, or programmed cell death.

Apoptosis is synonymous to programmed cell death

Explanation:

Programed cells death of the cell is required to maintain proper tissue homeostasis. Examples of when apoptosis is necessary are when a cell may have errors in its DNA replication process. Apoptosis ensures the cell does not continue dividing and generating cells with the error. Other forms of damage to a cell that is hard to repair  also require that the cell undergo apoptosis.

In cancer cells, apoptosis pathway faulted and even when cells are required to undergo programmed cell death, such as in the case when lethal mutations occur, the cell continues to divide creating many cells that have the defect. This is what creates cancer tumors,

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Answer: haploid

apoptosis

metaphase plate

Parthenogenesis

Meiosis

chiasma

Answers may vary. Meiosis results in four daughter cells, whereas mitosis produces only two daughter cells. Meiosis has two distinct phases, meiosis I and meiosis II, whereas mitosis takes place in a single cycle. Daughter cells in meiosis are genetically unique from one another. Mitotic daughter cells are genetically identical. Both mitosis and meiosis have similar basic steps (prophase, metaphase, anaphase, and telophase). Both mitosis and meiosis have cell cycle regulation mechanisms, including checkpoints and cell cycle regulators, which allow them to consistently produce normal cells.

Explanation:

If the mistletoe population decreased I size the carrying capacity of the apple trees could increase.

Explanation:

Mistletoe is a parasitic species that can affect several tree species.  In a parasitic relationship only one party will be benefited while the other party will be affected negatively.  The scientific name of common mistletoe is Viscum album L. and it can affect tree vitality and productivity.

Mistletoe can affect the flowering and fruiting of trees which makes apple trees lag behind in fruit production.  The infection can also make the trees more susceptible to further attacks from other pests. Thus controlling mistletoe infection would help greatly in improving tree health and productivity.

Answer

c

Explanation:

because mechanical energy has approximately 2.65% chemical energy causing it to be able to constantly change.

The mechanical energy becomes chemical energy an infinite number of times. The correct option is C.

Mechanical energy is the energy that can be kinetic or potential. It is the energy that is possessed by an object when it is doing any work or is in motion. For example, if a box is held vertically, it contains mechanical energy that is released when it is released.

Chemical energy is the energy that is stored in the bonds of atoms and molecules. The energy is released when any reaction happens, the bonds release energy.

The mechanical energy can change into chemical energy for an infinite time because during every reaction, the energy is used and chemical energy is either formed or released.

Thus, the correct option is C. an infinite number of times.

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Answer:

D

Explanation:

These include voice changes, body shape, pubic hair distribution, and facial hair.

Breast development. changes in body shape and height. growth of pubic and body hair. the start of periods.

The first places to grow are the extremities (head, hands, and feet), followed by the arms and legs, and later the torso and shoulders. This non-uniform growth is one reason why an adolescent body may seem out of proportion. During puberty, bones become harder and more brittle.

During adolescence, individuals experience puberty, marked by an adolescent growth spurt, sexual maturity, and the development of primary and secondary sexual characteristics. These changes are regulated by hormones and result in noticeable physical transformations.

During adolescence, a number of significant body changes occur as part of the developmental process. Adolescence is identified by the onset of puberty, during which individuals experience a series of physical and hormonal changes that lead to sexual maturity. One notable change is the adolescent growth spurt (AGS), a period characterized by rapid growth in height and weight, and changes in body composition and proportions.

Further developments during puberty include the maturation of primary and secondary sexual characteristics. Primary sexual characteristics involve the organs needed for reproduction, such as the uterus and ovaries in females, and the testes in males. Secondary sexual characteristics are indicative of sexual maturation but do not directly involve the reproductive organs, such as the development of breasts and hips in females, and facial hair and a deepened voice in males. These changes are controlled by a complex release of hormones including GnRH, LH, FSH, testosterone in males, and estrogen in females.

Therefore, the correct answer to the question 'Which body changes occur during adolescence?' is D) growth spurts, puberty, and sexual maturity.

Answer:

stem cells

Explanation:

Stem cells differ from other kinds of cells in the body. All stem cells—regardless of their source—have three general properties: they are capable of dividing and renewing themselves for long periods; they are unspecialized; and they can give rise to specialized cell types.

Unspecialized human cells are known as stem cells. They have the unique ability to produce more cells of the same type, and under certain conditions, to specialize into more specific cell types.

Unspecialized human cells are called stem cells. Stem cells are unique because they are unspecialized cells capable of renewing themselves through cell division, and under certain physiological or experimental conditions, they can be induced to become tissue or organ-specific cells with special functions. Stem cells serve as a sort of repair system for the body, replenishing adult tissues. In a developing embryo, stem cells can differentiate into all of the specialized embryonic tissues. In adult organisms, stem and progenitor cells act as a repair system for the body, replenishing adult tissues.

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The molecules do gain or loose energy from surrounding all the time depending on the temperature difference. So its not only during the state changes.

Option A.

The molecules in a particle has a particular amount of energy all the time. This is the molecular kinetic energy that owes to the vibration of a molecule at a particular time.

In case of a temperature difference between a matter and its surrounding, the molecules do either absorb energy or emit energy. During a state change, the energy absorption or emission is huge, which leads to the change of state, and there's no change in temperature of the matter at that particular time. So energy changes do occur at any time, not only during the change of state

Answer: Molecules gain or lose energy during any temperature change, not just phase changes.

Explanation: Molecules can experience an increase in temperature in circumstances other than phase changes. Also, i got 100 on the exam

The particles in a liquid state are able to move freely, with some friction occurring.

The correct answer is B. Particles are able to move freely, some friction occurring. In a liquid state, the particles have enough energy to overcome some of the attractive forces between them, allowing them to move and flow. While the particles are still in close proximity, they are not tightly packed together like in a solid state. The movement of liquid particles gives liquids their characteristic ability to take the shape of their container.

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B. many celled eukaryotic.

Hope this helps, if not, comment below please!!!!!

Answer:

The answer is "B"

Explanation:

Decomposers like bacteria and fungi decompose any amount of living and non-living organic matter that is left unconsumed in the ecosystem. They cycle the matter back into the food chain in forms that can be used by producers to make the matter available to the consumers.

Answer:

One similarity between the sunflower plant and paddy plant is that both of them have a non-woody stem. The three differences are; sunflower plant is a dicot, and has branching veins and taproots while paddy plant is a monocot, and has parallel veins and fibrous roots.

Explanation:

The paddy plant is a monocot (monocotyledon), where only one embryonic leaf (cotyledon) is present inside the seed coat. The monocots have a fibrous root system and their leaf veins are parallel. The sunflower plant is a dicot or dicotyledon, which contains two embryonic leaves inside the seed coat. The leaf veins of dicots are branched. They have taproots. Both the sunflower plant and paddy plant can be used as food. Both have a non-woody stem.

     Earth and all the other planets orbit the Sun.

    The shift from a geocentric to a heliocentric model represents a fundamental change in our understanding of the solar system's organization. In the geocentric model, which prevailed for centuries, Earth was considered the stationary center of the universe, with the Sun, Moon, planets, and stars orbiting around it. This view was supported by observations of celestial motion and was deeply entrenched in both scientific and religious thought.

    However, advancements in astronomy and the development of new observational techniques challenged the geocentric model. In the 16th century, the heliocentric model emerged, proposed notably by Nicolaus Copernicus. According to this model, the Sun is at the center of the solar system, with Earth and other planets orbiting around it. This concept was revolutionary and marked a significant shift in our understanding of the cosmos.

    In the heliocentric model, Earth is just one of several planets orbiting the Sun. Each planet follows an elliptical path around the Sun, with the Sun exerting gravitational force as the central body. This model not only provided a more accurate explanation of celestial motion but also laid the groundwork for modern astronomy and our understanding of the universe's structure.

    Today, the heliocentric model is widely accepted and forms the basis of our understanding of the solar system. It has been validated through numerous observations, experiments, and mathematical calculations, including those by Johannes Kepler and Isaac Newton. The heliocentric view allows for a more coherent explanation of planetary motion, gravitational interactions, and other celestial phenomena.

    In summary, the transition from a geocentric to a heliocentric model signifies a profound paradigm shift in our understanding of the solar system's organization. It asserts that the Sun, not Earth, is the central body around which the planets orbit, revolutionizing our perspective on the cosmos and laying the foundation for modern astronomy.

Answer:

Which type of fossil is an imprint made by an organism that was preserved in rock? A.cast fossil B.sedimentary fossil C.mold fossil D.petrified. I honestly don't know the answer but in my opinion its  B.sedimentary fossil don't know look here.

Explanation:

Well a sedimentary fossil does have organisms, plus+ Jump to Fossils - Sedimentary rocks contain important information about the history of the Earth. They contain fossils, the preserved remains of ancient plants and animals. ... Sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains.

Sedimentary fossil is an imprint made by an organism that was preserved in rock.

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation.

Almost all fossils are preserved in sedimentary rock. Organisms that live in topographically low places (such as lakes or ocean basins) have the best chance of being preserved.

Hence , B is correct option

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ORIGINAL SCIENCE

Explanation:

SOCIAL SCIENCES( ECONOMICS, PSYCHOLOGY)

NATURAL SCIENCES (BIOLOGY, PHYSICS, CHEMISTRY)

FORMAL SCIENCES( LOGIC, MATH)

Species diversity is very important to keep a biodiversity and a sustainable ecosystem running.  

A species diversity is of three types. It’s actually a biodiversity which are of three types – alpha biodiversity, beta biodiversity and a gamma biodiversity. These bio diversities are necessary for a particular reason. They are  

The proteins will correspond with facilitated transportation

Option A

Carbohydrate will correspond with cellular respiration.

Option D

Lipid forms the cell membrane.

Option B

Nucleic acid will correspond with identical daughter cells.

Option C

Proteins form all the sorts of receptors that are associated with the both transport and chemical messenger of the cell. The proteins help in facilitated transportation across the cell membrane along the concentration gradient.

The carbohydrates are the chief respiratory substrate that are biologically oxidized in an aerobic respiration to give out carbon dioxide, water and energy.

The lipids are the main composition of a cell membrane which is formed of phospholipids like lecithin, cephalin etc. These lipids have both hydrophilic and hydrophobic characters which is ideal for a cell membrane.

The nucleic acids are the DNA and RNA which are the genetic messengers of a cell that carries the genetic information across the generations to maintain the particular race. They maintains the properties of the organism.

Science is the study of everything it is generally has it's fingers in every (subject) pie. But could be the detailed description of it.

Answer:

Science is about the cells and stuff while art is about the drawing and human body and history is about the stuff that has or is happening in our world.

Explanation:

Do you need this on like a quiz or somthing? Just wondering

The first ever Chipko Movement was initiated by the Bishnoi Samaj in Rajasthan about 260 years ago.

Explanation:

It all began when the Jodhpur King ordered to axe a huge number of trees in the khejadi village of Jodhpur.

When the soldiers began to cut the trees in spite of people protesting against it, one of the villagers (Bishnoi community) named, Amrita Devi, hugged a tree along with her daughters so as to protect it from the soldiers.

But unfortunately, the soldiers sacked the heads of Amrita Devi and her daughters; which led the villagers to rise together and protect the trees in the same way like how Amrita did.

The soldiers also sacked a lot of villagers who embraced the trees. Finally, the king startled at the unity of the people, abandoned the idea of axing the trees.

This movement based on the principles of satyagraha and non-violent resistance done by hugging the trees to protect them from being axed down became the novel example for all forest conservation movements.  

Answer:

The Chipko movement or Chipko Andolan, was a forest conservation movement in India. It began in 1970s in Uttarakhand, then a part of Uttar Pradesh (at the foothills of Himalayas) went on to become a rallying point for many future environmental movements all over the world. It created a precedent for starting nonviolent protest in India,[1] and its success meant that the world immediately took notice of this non-violent movement, which was to inspire in time many similar eco-groups by helping to slow down the rapid deforestation, expose vested interests, increase social awareness and the need to save trees, increase ecological awareness, and demonstrate the viability of people power. Above all, it stirred up the existing civil society in India, which began to address the issues of tribal and marginalized people. The Chipko Andolan or the Chipko movement is a movement that practiced methods of Satyagraha where both male and female activists from Uttarakhand played vital roles, including Gaura Devi, Suraksha Devi, Sudesha Devi, Bachni Devi and Chandi Prasad Bhatt, Virushka Devi and others. Today, beyond the eco-socialism hue, it is being seen increasingly as an ecofeminism movement. Although many of its leaders were men, women were not only its backbone, but also its mainstay, because they were the ones most affected by the rampant deforestation,[2] which led to a lack of firewood and fodder as well as water for drinking and irrigation. Over the years they also became primary stakeholders in a majority of the afforestation work that happened under the Chipko movement.[3][4][5] In 1987, the Chipko movement was awarded the Right Livelihood Award "for its dedication to the conservation, restoration and ecologically-sound use of India's natural resources."[6]

Chipko-type movements date back to 1730 AD when in village Prasanna Khamkar of Rajasthan, 363 Bishnois sacrificed their lives to save Khejri trees.

Explanation:

Answer:

Unicellular organisms like bacteria and fungi are very useful for human in various way.  Bacteria such as NItrobactor, Psuedomonas, Lactobacillus, E.coli are very useful in variety of use., Some fungi like Penicillium,  produce antibiotics, fungi is a good source of food.

Explanation:

Here we can understand the usefulness of bacteria and fungi by following points-

Final answer:

Unicellular organisms like bacteria and fungi are useful to humans and the environment. Bacteria help decompose organic matter and are used in food production. Fungi break down organic matter, produce antibiotics, and aid in food fermentation.

Explanation:

Unicellular organisms, such as bacteria and fungi, have several uses for humans and the environment. Bacteria, for example, play a vital role in decomposing dead organic matter, thus recycling nutrients back into the ecosystem. They are also used in the production of various foods, such as yogurt and cheese. Fungi, on the other hand, are important decomposers and play a crucial role in breaking down organic matter. They are also used in the production of antibiotics, such as penicillin, and in the fermentation of food and beverages, like bread and beer.

Answer:Transpiration

Explanation: water cycle is the continuous movement of water on the Earth to ensure the availability of water.water is a universal solvent that is essential for the survival of living things.water cycle ensure that clean water is available.plants require water which is gotten from the soil.water is lost from the leaves of trees through transpiration.transpiration may also occur through the lenticels and stomata of stems.

the movement of water through the plant is called transpiration pull.this is responsible for the pull of water into the leaves.it increases the absorption of minerals from the soil and also cools the plant.

This water vapour that transpire from the plant,is condense as clouds, which then falls to the Earth as rain and the water cycle continue

Answer:

4 ATP

Explanation:

Answer:

4 ATP I think not to sure

Answer:

it's B

Explanation:

Tropical rainforest biome occur in regions that like between the equator and latitudes 5°-10° N and S. The forest areas are mainly in the lowlands but they can also extend hillslopes to a height of 600 or 900m.

An example is in Nigeria.

The climate in tropical rainforest regions is hot and wet throughout the year. It is dense and made up of many types of broad leaved trees that are mostly evergreen.

Epiphytes plants and Woody climbers known as Lianas are common features of these forests.

PeAcE.

Final answer:

The tropical rainforest biome is located near the equator. This biome is distinct from boreal forests, which are found in the colder regions south of the Arctic Circle and are characterized by coniferous trees.(Option B)

Explanation:

The tropical rainforest biome is found near the equator. Characterized by high biodiversity and constant warmth, it experiences abundant rainfall throughout the year. The tropical rainforest is the most diverse terrestrial biome and is often referred to as 'nature's pharmacy' due to the potential for new drugs from the organisms that inhabit these forests. With its dense vegetation of evergreen trees with broad leaves, the tropical rainforest biome plays a crucial role in the Earth's ecology and climate.

Boreal forests, also known as taiga or coniferous forests, are a different biome entirely, found in much colder regions south of the Arctic Circle. The boreal forest experiences cold, dry winters and short, cool, wet summers, and is characterized by trees such as pines, spruces, and firs that can tolerate the harsher conditions. This biome spans across Northern America and Eurasia, with its southern border extending to roughly between 50° and 60° north latitude.

The role of cyclin-dependent kinases in the cell cycle is that, they stop the cycle if something has gone wrong.

Explanation:

In Eukaryotic cells cyclin-dependent kinases are universal regulator cell. It undergoes a constant cycle and degradation known as Mitotic and G1 cyclin. When cycle dependent cycle synthesize it acts like an activating protein and then bind to cyclin-dependent kinases forming cyclin-dependent kinases complex.

Now it acts as signal to the cell to pass the next phase of cell cycle. After its cyclin gets degraded, it deactivates the cyclin-dependent kinases and from particular phase signalling stop

Cyclin-dependent kinases, when bound to cyclins, form active complexes that phosphorylate other proteins to advance the cell through various checkpoints of the cell cycle. The concentrations of cyclin govern the timing of these events, and Cdk inhibitors can halt the cycle if necessary until conditions are favorable for progression.

The role of cyclin-dependent kinases (Cdks) in the cell cycle is crucial for the regulation and progression of the cell through different phases. Cdks, when bound to cyclin proteins, form active complexes that can phosphorylate other proteins. This phosphorylation is essential for activating proteins that advance the cell past various checkpoints, ensuring proper cell cycle progression.

These kinase enzymes are regulated by the levels of cyclins, which fluctuate during the cell cycle. The formation of the Cdk/cyclin complex, and its subsequent activation by phosphorylation at specific sites, is integral to the cell's advance to the next phase. These complexes become active at different points, each regulating distinct checkpoints within the cell cycle.

Furthermore, Cdk inhibitors play a role in halting cell cycle progression under problematic conditions until issues are resolved, ensuring the cell cycle only proceeds when it is safe to do so. By controlling the cell's progression through checkpoints such as G1, G2, and metaphase, these molecules serve as both triggers and gatekeepers of the cell cycle.

Answer:

D. Ticks live on and drink blood from a cow.

This is an example of parasitism, where the ticks (parasite) are living off of the blood of the cow, the host animal.

Explanation:

Parasitism is a relationship between organisms. In this relationship, one organism (parasite) lives on or in another organism (host) and gains benefits from the host, causing it some harm.

Parasites are classified as ectoparasites, which live on the body surface of the host (ticks, fleas, leeches, and lice) and endoparasites, which live in the body of the host. Endoparasites are either intercellular, which live inside the host’s body (round worms, tapeworms) or intracellular, which live inside the cells in the host’s body (bacteria or viruses).

Parasites help to control dominant species and has a role in evolution by transferring genetic material between species.

Answer:

Ticks live on and drink blood from a cow

Explanation:

The only feed on cow and the cow gain nothing in return. That is parasitic

When a population is in Hardy-Weinberg equilibrium, the gene pool stays the same. The correct option is B.

The Hardy-Weinberg equilibrium principle states that both the frequency and distribution of alleles in a population remain constant over the generations if the population is not subjected to evolutionary influences.

The Hardy-Weinberg equilibrium principle is utilized to examine the genetic variability in a population. It states that if the population meets certain requirements, such as having a large number of individuals, random mating, no mutations, no gene flow, and no selection pressure, the gene pool of that population will remain steady over generations.

This principle demonstrates that the genetic makeup of a population is not subject to changes over time, and the allele frequencies remain constant. This principle is essential since it establishes the limits within which evolution can occur in a population.

Therefore, the correct option is B.

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Answer:

Each ATP molecule contains one ribose molecule, one adenine molecule and three phosphate  groups.

Explanation:

Each molecule of Adenosine triphosphate (ATP) is composed of one ribose molecule (sugar), one adenine molecule (nitrogenous base), and a chain of three phosphate groups bound to ribose. It is the energy-carrying molecule present in the cells of all organisms. Cells in the body of the organisms produce the energy for their functioning, by converting the energy stored in the food nutrients into a more usable form called adenosine triphosphate (ATP), which will release energy when the need arise. This process is known as cellular respiration.