you carry a 20.N bag of dog food up a 6.0 m flight of stairs.how much work was done

Answer:

In terms of ecology a niche can be defined as role or function an organisms play within the ecosystem. A niche represent the interaction of an organism with the living and non living components of the ecosystem. It is represented by predator-prey relationships, parasitic and mutualistic properties and other functions. The two species cannot occupy the same niche for an extended period of time, this can be explained by competitive exclusion principle. According to this principle, no two species can have the same ecological niche. The two or more species competing for the same resource in an ecosystem the one species having more favorable adaptations will be able to thrive resources better than others. Therefore, this  will result in the decrease in abundance, migration and extinction of weak and less competitive species.

Correct answer: B). Different patterns in their gene expression.

The stem cell is a special type of cell that has the potential to develop into other types of cell. It has self-renewal property that can give rise to any type of cell of the body. Gene is expressed due to the specific combination of genes that turned off and on that regulate how the cell functions.

These cells start to divide in an asymmetrical manner in order to produce a large variety of cells with the unique gene expression, functional and morphological characteristics.

Hence, the correct answer would be option B.

Answer: The correct option is -

C) Four gametes are produced for every original cell.

Explanation:

Meiosis is a type of cell division that occurs during the process of formation of gamete ( that are haploid, reproductive cells such as eggs and sperms) particularly in case of organisms that perform sexual reproduction.

During this process, a diploid parent cell produces four haploid cells (gametes or sex cells) through two rounds of cell division ( that are meiosis I and meiosis II).

This is also known as reductional cell division. Thus, four gametes are produced for every original cell.

Therefore, option C) is the right answer.

Answer: The population size that the environment can sustain.

Explanation:    

The carrying capacity can be defined as the maximum number of individuals of the population of a species which an ecosystem can support and sustain in terms of availability of resources such as water, food, shelter and other needs. When the population of the species exceeds the carrying capacity of the ecosystem the population starts declining to maintain the number which a carrying capacity of the ecosystem can sustain. On the basis of the above information, The population size that the environment can sustain. is the correct option.

Eukaryotic cells have a defined nucleus and other specialized organelles enclosed in membranes. Prokaryotic cells, however, lack a nucleus and other membrane-bound organelles. The cell type can thus be determined from these structural features.

Without being able to view the actual diagram, it is difficult to confirm whether the cell shown is eukaryotic or prokaryotic. However, I can provide the defining characteristics of both. Eukaryotic cells possess a defined nucleus, where genetic material is stored, and other specialized organelles, both of which are typically enclosed in membranes. Prokaryotic cells, on the other hand, do not contain a nucleus and lack other membrane-bound organelles. So when you mention structural features in the diagram, look for presence of a nucleus and other organelles for eukaryotic cells and absence of these for prokaryotic cells.

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Organisms from the higher trophic levels consume organisms from the lower trophic levels. During this process, energy is lost as metabolic heat. Primary producers on the first trophic level contain the greatest amount of energy originally from the sunlight. The next trophic level belongs to primary consumers that consume primary producers which result in less energy. Similarly, secondary consumers eat primary consumers, and energy is lost again. The highest trophic level is tertiary consumers and they contain the least amount of energy.

Q6. The answer is Elements continuously cycle between the physical environment and living organisms.

Biogeochemical cycles are pathways by which chemical substances move through biosphere and geosphere (lithosphere), as well as atmosphere and hydrosphere. In these cycles elements are recycled, they are not lost. They continuously cycle between the physical environment and living organisms.

Q7. The answer is grass, grasshopper, snake, hawk.

Figure 3-4 is not attached, however, the logic food web among all choices wood be: grass, grasshopper, snake, hawk.

Grass belong to the producents. Grasshopper is a primary consumer and it eats producent grass. Snake, as a secondary consumer, eats the primary consumer grasshopper. A terciary consumer hawk eats the secondary consumer snake.

The Correct Answer is: A.It prevents water loss.

Oxygen released by living cyanobacteria caused dissolved iron to rust and deposit in banded iron formations. This implies the correct answer is B.

The first source of oxygen was the oxygen released by living cyanides in the ocean which then was released into the atmosphere. This implies the correct answer is C.

Question 1:

Banded iron formations are the major part of sedimentary rock. These formations are of always of the earliest part of the earth’s history also known as Precambrian age.

The general theory is that banded irons layers were developed in seawater due to the oxygen that was released by cyanobacteria. The oxygen that was released then joins with dissolve irons to form insoluble iron oxide and a thin layer on the floor of the ocean.

Most of the oldest rock formations and linked with banded iron formations and they are made up of approximately 60% of global iron reserves.  Banded iron formations can be found in the following places: United States, Ukraine, South Africa and many more.

Question 2:

The first source of oxygen is oxygen released by living cyanides in the ocean which then was released into the atmosphere.

The first microbe to produce oxygen in our atmosphere is known as Cyanobacteria. Cyanobacteria or blue-green algae produce the first oxygen about 3.5 billion years ago by photosynthesis.

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KEYWORDS:

The correct answer is (4) Autotrophic organism.

Green plants make their own food by the process of photosynthesis using sunlight. Most of the autotrophs use carbon dioxide, sunlight and carbon dioxide to produce glucose that is used by the plants to obtain energy. Most of the oxygen comes from these organisms and decrease in the number of green plants can lead to several problems due to decrease in the amount of oxygen. Example: green plants, algae, and even some bacteria. This food and oxygen is produced by the action of autotrophic organisms

In an ecosystem, a predator is considered a biotic factor, as it is a living organism that impacts other organisms in its environment. While temperature range, mineral types, and water chemistry are important, they are abiotic (non-living) factors.

In an ecosystem, factors can be either biotic (living) or abiotic (non-living). Out of the options given, predator is considered a biotic factor. Biotic factors are all the living organisms that inhabit an environment, including animals, plants, fungi, and bacteria. A predator is an example of a biotic factor because it is a living organism that impacts other organisms in the ecosystem through predation.

Other options like temperature range, mineral types, and water chemistry are considered abiotic factors because they are non-living factors that also play a major role in the ecosystem.

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The heart consists of cardiac muscle tissue, which can contract on its own without nervous system stimulus, unlike other muscle tissues. Skeletal muscle, controlled by conscious decisions, moves the skeleton. On the other hand, smooth muscle is involuntary and is located in places such as digestive tract and blood vessels.

The type of muscle tissue found in the heart is called cardiac muscle. It is unique and different from other muscle tissues in that it has the ability to contract on its own without nervous system initiation, a property known as automaticity or inherent rhythmicity.

Comparatively, skeletal muscle tissue is associated with the skeletal system. It is voluntary, meaning its contractions can be consciously controlled. And like cardiac muscle, skeletal muscle is striated, or has a banded appearance due to the organized arrangement of proteins within the muscle cell.

The third type of muscle tissue is smooth muscle. Unlike the other two, it lacks striations and its contractions are involuntary. This tissue type is found in places like the walls of blood vessels and the digestive tract where it helps to propel food along.

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D) Packages proteins for transport out of the cell

The Golgi apparatus modifies proteins and lipids that were synthesized in the endoplasmic reticulum (ER). This includes the addition of carbohydrate groups (glycosylation), phosphate groups (phosphorylation), and other modifications. It processes and sorts these molecules to prepare them for their final destinations.

The Golgi apparatus also sorts modified proteins and lipids and packages them into vesicles. These vesicles are then transported to their specific destinations within or outside the cell.

Complete Question:

What is the function of the organelle identified as #6 in the picture (it is mostly brown, folded over, and is in the lower right part of the cell)?

A) movement

B) houses the cells DNA

C) house the digestive enzyme

D) packages proteins for transport out of the cell

The answer is definately that water has a high heat capacity

Answer:

d is incorrect is c they obtain energy trapped and stored by plants.

Answer:

Acceleration

Explanation:

The rate of change of velocity is known as acceleration. Acceleration is the rate of increase/decrease in motion, action or speed

Suppose the initial speed of any object is [tex]v_0[/tex] and the final speed of any object is [tex]v_f[/tex] and the object changes this speed in a time period of [tex]t[/tex] seconds, then the mathematical formula for acceleration would be

[tex]a= \frac{v_f-v_0}{t}[/tex]

where, "a" is the acceleration

The unit of acceleration if meter per second square.

Answer:

Option C.

Explanation:

If a line passes through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex], then the equation of line is

[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]

From the given graph it is clear that the line passes through the point s(0,0) and (1,1). So, the equation of trend line is

[tex]y-0=\frac{1-0}{1-0}(x-0)[/tex]

[tex]y=x[/tex]

Substitute x=8 in the above equation to find the MOST reasonable measurement at the end of a 8 week period.

[tex]y=(8)[/tex]

[tex]y=8[/tex]

The MOST reasonable measurement at the end of a 8 week period is 8 decimeters.

Therefore, the correct option is C.

Answer:

The trees in my area do have much chlorophyll, and are starting to turn more green now that the winter has passed. This is because it's currently spring. During this time there's more sunlight and many trees, along with enough glucose to sustain them. Now, photosynthesis is taking place, and trees are reproducing. So yes, I do think that in 3 months it'll be summer, and there will be even more sunlight and chloroplast in the trees.

Explanation:

Isn't it funny that now you have an answer if it's fall or spring where you live?

Don't write the exact same thing because I just gave this to my teacher in a-p-e-x in march 2021. So please, our teachers are smart.

Hope this helps! :D

Electrons in photosystem I gain energy by absorbing photons, which excites the electrons from splitting water, later used to form ATP and NADPH.

Electrons gain energy in photosystem I when they absorb photons. The chlorophyll molecules in the photosystem absorb light and become excited. This energy is then used to excite electrons, which are transferred to the primary electron acceptor. The energized electrons come from the splitting of water, a process that occurs in photosystem II and is aided by the light energy captured by chlorophyll a molecules.

Once excited, the electrons travel through the electron transport chain, contributing to the generation of a proton gradient that leads to the synthesis of ATP in chemiosmosis. Then, absorbing a second photon in photosystem I results in the formation of NADPH molecule, another energy carrier important for the light-independent reactions such as the Calvin cycle.

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Answer : The size of abdomen appeared to be huge because it stored stomach and many visceral organs.

When the dead deer was spotted by the person it appeared to be much bigger than usual because when the deer was hit by the car it remained there for several hours or may be days and nobody cleared that; From the sun's heat which was falling on the dead deer's body the internal organs were heated up, making them swelled and enlarged than their usual size.