Read the observation, question, and hypothesis. Then choose the independent variable from the list
Observation Bread seems to turn moldy faster in summer than in winter
>
Question: Do hotter summer temperatures turn bread moldy faster?
Hypothesis Bread turns moldy faster at higher temperatures.
The independent variable is
bread
mold.
summer
O
temperature,

Answer: cell wall

Explanation: a cell wall is a complex protective structure which gives shape and protection to a plant cell.

Among the functions of a cell wall is maintaining the structural integrity of a cell and providing strength. Because a cell wall has semi-permeable outer layer, it filters molecules that pass in and out of the cell hence, acting as a defense structure against a variety of external factors. It has pores and receptors that regulate various functions of the cell.

The organelle that provides protection and support to a cell is A. Cell Wall.

The cell wall is a rigid structure that surrounds the cell membrane. It is made up of cellulose, a long, chain-like molecule that is found in plants. The cell wall provides support and protection for the cell. It helps to maintain the cell's shape and to protect it from damage.

The cytoplasm is the jelly-like substance that fills the cell. It is made up of water, proteins, carbohydrates, lipids, and other molecules. The cytoplasm contains all of the cell's organelles, except for the nucleus. The cytoplasm is where most of the cell's chemical reactions take place.

Option A is correct.

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Answer:

The reason why the ball rolling across carpet will come to a stop faster than the one rolling across concrete is the friction (option B).

Explanation:

The contact surface on which the balls move is different. Irregularities in the carpet cause the ball in it to stop faster. The concrete surface is less irregular, and allows the ball to move a little more and then stop. This is due to friction.

In physics, friction is a force that is capable of opposing movement, since the contact of two surfaces limits its movement. A smooth surface produces less friction than a rough or irregular surface.

Since the friction that stops both balls occurs when they are in motion, it is called dynamic friction, that is, the force that causes a moving body to stop.

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Answer:For usa test prep im pretty sure it is friction

Explanation:

Answer:

Alleles are responsible for the variations in which a given trait can be.

Explanation:

A gene is a portion of DNA that determines a certain trait. An allele is a specific form of a gene. Genes are responsible for the expression of traits.

Answer: Alleles are responsible for the variations in which a given trait can be.

Explanation:

The taxonomic classification system, also known as the Linnaean system, was introduced by Carl Linnaeus and sorts organisms into hierarchical categories including domain, kingdom, phylum, class, order, family, genus, and species.

The name of the system of classification that scientists use to classify organisms into categories according to their shared characteristics is called the Linnaean system. This system was developed by Carl Linnaeus in the 18th century and it is still widely used today. The Linnaean system organizes organisms into a hierarchical taxonomy, with the broadest category being domain, followed by kingdom, phylum, class, order, family, genus, and finally species.

The name of the current system of classification that scientists use is known as the taxonomic classification system or the Linnaean system. This system, invented by Carl Linnaeus, categorizes organisms using a hierarchical structure, beginning with broader groups that become more specific. The major categories in this hierarchical order include domain, kingdom, phylum, class, order, family, genus, and species. In binomial nomenclature, an organism's scientific name is made up of its genus and species name. This system reflects the relatedness of organisms, where those sharing a more recent common ancestor are grouped more closely together.

Answer:

Both algae and microalgae serve as excellent food sources in aquatic ecosystems. They produce most of the oxygen in the atmosphere during photosynthesis. Both algae and microalgae serve as natural filters of phosphates and nitrogenous wastes.

Answer:

"They may be on one sex chromosome and not the other" is true of sex-linked genes.

Explanation:

Gender related is a function in which a gene is found on a sex chromosome. It is because the X chromosome is wide and includes a lot more genes than the shorter Y chromosome. In a sex-linked disorder, males are typically affected, because they have a single xerox of the X chromosome that contains the mutation. Prominent examples of sex-related genes in human beings are those that code for colorblindness, or those that code for hemophilia i.e incapacity to make blood clots.

Answer:

economic importance of earthworm?

Earthworm has so many economic importance which are listed below;

Aeration of soil

Add humus to the soil

Helps to increase soil fertility and

Explanation:

Answer:

Common cold is a viral disease that spreads easily through air and affect the healthy person.

Explanation:

The correct option is (b). The offspring of a parent plant with round seeds and a parent plant with wrinkled seeds will have seeds both round and wrinkled.

According to the theory of blending inheritance, the traits of the offspring are a blend of the traits of the parents. This theory was proposed by Charles Darwin and was one of the early models attempting to explain the inheritance of traits.

Let's examine the options based on this theory:

a. The offspring of a parent plant with yellow seeds and a parent plant with green seeds will either have yellow or green seeds. This statement is not consistent with blending inheritance, which would predict that the offspring would have a seed colour that is a blend of yellow and green, such as a pale yellow or a yellowish-green.

b. The offspring of a parent plant with round seeds and a parent plant with wrinkled seeds will have seeds both round and wrinkled. This statement is consistent with blending inheritance, as the seeds of the offspring would be expected to exhibit a phenotype that is intermediate between round and wrinkled, possibly being less round or slightly wrinkled.

c. The offspring of a tall parent plant and a short parent plant will all have a height in the middle. This statement is consistent with blending inheritance, which would predict that the offspring's height would be an average of the parents' heights. However, this is not a definitive statement about the theory, as it does not necessarily apply to continuous traits like height in a straightforward blending manner.

d. The offspring of a parent plant with purple flowers and a parent plant with white flowers will all have purple flowers. This statement is not consistent with blending inheritance, which would predict that the offspring would have a flower colour that is a blend of purple and white, such as lilac or pale purple.

Therefore, the only statement that correctly reflects the predictions of blending inheritance is option b.

Answer:

D.  I, II, IV, and V only

Explanation:

Answer:

B. It is a female with at least one dominant allele.

Explanation:

In pedigrees, a circle corresponds to a female, and a square to a male. The person labelled A is a circle, so must be a female.

Affected individuals are shaded grey. In this case, we are looking at the trait of attached earlobes, which is recessive. To have the trait you need two recessive alleles. This female is not affected, meaning she does not have two recessive alleles, one of her alleles must be the dominant allele.

That means, either she is heterozygous (has one dominant allele and one recessive allele) or homozygous dominant (two copies of the recessive allele)

Answer: James W. Black, Scottish Nobel Prize-winning doctor and medical research scientist had died that day

Answer:

Social problem-solving is generally considered to apply to four different types of problems: Impersonal problems, for example, shortage of money; Personal problems, for example, emotional or health problems; Interpersonal problems, such as disagreements with other people.

Explanation:

Science can aid in addressing numerous societal issues such as climate change, health concerns, and technological advancements. Scientific research sheds light on factual information which guides our approach to these challenges. Through understanding the workings of our world, we can implement more effective solutions on a societal level.

There are numerous societal problems that science can significantly aid in solving. One prominent example is the challenge of climate change. Science guides us in understanding the complexities of climate change and implementing solutions, such as decreased use of fossil fuels, enhancements in food production, and modifications in travel patterns to mitigate negative environmental impacts.

Scientific research is also critical in shaping our approach to healthcare, informing decisions related to disease prevention, mental health, and overall wellbeing. Without the evidence provided through scientific research, we risk relying on misinformation or unfounded beliefs.

Furthermore, science plays a pivotal role in navigating technological advancements. It allows us to comprehend the workings of technologies we use daily, like computers and phones, thus enhancing our ability to implement technology effectively and judiciously at a societal level.

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Scientific concepts and principles span various disciplines, including the natural sciences, ethics, and sustainability, with the aim of understanding and describing the universe. The methodical application of scientific methods leads to the formulation of theories and laws, documented through peer-reviewed research essential for ongoing scientific dialogue and progress.

Scientific concepts and principles are central to understanding the universe and range from the physical world to ethical and environmental considerations. Scientific methods involve inductive and deductive reasoning, with the aim to develop scientific theories and laws. These principles are not just confined to natural sciences like physics, chemistry, and biology, but also extend across various areas, including sustainability, environmental concerns, and ethical practices.

For instance, physics employs mathematical formulas to articulate laws of nature, such as F = ma, which describes the relationship between force, mass, and acceleration. Biology explores the complex interrelations of living organisms, as they relate to concepts like ecosystems, evolutionary biology, and homeostasis. Meanwhile, sustainability emphasizes the imperative of maintaining a balance within the environment to ensure the wellbeing of current and future generations.

Ultimately, scientific inquiry is dynamic and ever-evolving, with the core mission of expanding knowledge and solving practical problems through basic and applied research. This iterative process is integral to producing reliable and peer-reviewed scientific papers that communicate findings to the broader community.

Answer: depends on the gene you’re referring to. There are genes that do not present with a phenotype.

Phenotype is an observable characteristic. There are many genes that do not have an effect on physical characteristics.

Explanation:

Answer:

did gene present in human body with out phenotype?

No, it is not found in human body

Explanation:

Phenotype is only expressed physically through characteristics such as color, height, among others.

Answer:

From Penn Foster

Exercise: Cell and Tissue Development in Multicellular Organisms

A good answer should contain the following:

1. cell proliferation

2. multipotent

3. embryonic stem cells

4.paracrine signaling

5. A tissue is a group of cells that work together to perform specific functions. Tissues require a mix of cells oriented properly and dividing at the rate necessary to replenish and maintain the tissue. Cells in tissue are constantly processing and responding to signals they obtain from their environment.

6. An organism's DNA serves as an instruction booklet of sorts for how to create the organism. In this analogy, one cell type reads one chapter of this genetic instruction manual, and another cell type reads a different chapter. Specific genes are turned off and on to control gene expression for compounds needed by different tissues of the body to allow differentiation into various cell types.

7. Totipotent cells can differentiate into any of the cells in an organism, plus any of the extraembryonic cells; pluripotent cells can differentiate into any of the cells of an organism; multipotent cells can differentiate into a few specific cell types based on the tissue in which the multipotent cell is located. A zygote is totipotent, human embryonic stem cells and induced pluripotent stem cells are pluripotent, and adult stem cells are multipotent.

Explanation:

From Penn Foster

The answer to the blanks are :

1)To form a multicellular organism, a zygote must divide many times in a process called cell proliferation.

2)Adult stem cells are considered multipotent , as they can differentiate into several different cell types in the tissue where they are located.

3)  Induced pluripotent stem cells are adult stem cells that have been  treated so that they act like embryonic stem cells.

4) A cell produces a chemical that diffuses short distances to reach nearby cells. This type of cell-cell interaction is an example of paracrine signaling.

5) Tissue and relate to individual cells

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I'm assuming your equation is (y^4*y^n)/y^2=y^-3 correct?

Exponent rule: a^b*a^c=a^(b+c)

(y^4*y^n)/(y^2)=y^-3 becomes (y^(4+n))/(y^2)=y^-3

Exponent rule: a^b/a^c=a^(b-c)

New equation becomes y^(2+n)=y^-3

Get rid of the bases and you're left with 2+n=-3

Subtract 2 on both sides: n=-5

Answer is n=-5

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Answer:

When the salt water is mixed with fresh water,it is called brakish water which have the salinity 0.5 to 35 ppt.

Explanation:

The mixing of fresh and salt water is important for aquatic organisms.

The catadromous fish born in marine habitat but they spend their rest of life in the fresh water where growing and maturation takes place.

Ex- Eel is the common example of catadromous fish.

Like wise,

Anadromous fish born in fresh water and spends their life in the sea and return to fresh water for spawning.

For example Salmon, smelt, shad, are common examples.

Thus mixing of water is important for breeding and growing of these fishes.

More over, the brakish water contain world's most diversified life forms.

The mixing of fresh water and salt water in estuaries results in a brackish environment that is vital for many species' life cycles and contributes to a diversity of plant and animal adaptations. These areas are crucial for the ecological health of marine life.

The mixing of fresh water and salt water in estuaries is crucial because it creates a unique environment known as brackish water, which supports a diverse ecosystem. This mixture forms estuaries, biomes characterized by a gradient of salinity levels, which serve as essential nurseries for the young of many species such as crustaceans, mollusks, and fish. Estuarine environments also foster a range of adaptations in plant and animal species, enabling them to survive in varying salinity conditions. For instance, halophytic plants have evolved mechanisms to tolerate saline conditions, either by filtering salt through their roots or by pumping oxygen into their root systems to combat the low oxygen environment caused by higher salinity levels. Animals, such as mussels and clams, have developed behavioral adaptations to cope with the changing salinity, alternating between aerobic and anaerobic respiration as tides change, indicating a rapid physiological challenge these creatures face in their habitat. The tidal actions mix and redistribute the salinity in the estuaries, affecting biodiversity and the health of the ecosystems.

Answer:

~Producers

~Consumers

~Predators

Explanation:

Biotic factors(biotic components): It can simply be defined or described as any living components that affect another organism or shape the ecosystem. These includes both animals that consume other organism within there ecosystem, and the organism that is being consumed. These biotic factors are categorized in three place as enlisted above.

The:

Producers (Autotrophs).

Consumers (Deterotroph)

Decomposers( Detritivores).

To increase the validity of the results, all the students of Mr. Gracia's class must perform a few more experimental trials.

Answer: Option A

Explanation:

While dealing with the scientific analysis, one must always commit number of experiments to gain the most accurate and valid result. By doing number of trials, we get different approximate values that can be used to estimate the average result.

This average will be the nearest value of the exact answer if we add more and more number of experiments or trials. Since, the results are similar for each student in the class, they all should attempt more trials or experiments to get the most accurate result.

To enhance the validity of their results, the students should conduct additional experimental trials, as repetition increases reliability and helps identify possible experimental errors. The correct answer is option (A).

To increase the validity of their experimental results, it is essential for the students in Mr. Garcia's class to perform more experimental trials. This process, known as repetition, helps to ensure that the results are repeatable and reliable. Adding more trials would strengthen the evidence that the initial outcomes were not due to random chance or experimental error.

Discussing potential opportunities for experimental error and the controls that could be added to reduce such error would also help in refining the experiment and increasing the validity of the results. Each student conducting more trials would provide a larger data set, making it easier to identify any anomalies or consistent patterns within the results.

Thus, the correct answer to the student's question is option A) Each student should do a few more experimental trials.

Answer:

The correct option is B) Flies were not found in the sealed jars of rotting meat.

Explanation:

Redi discarded the phenomenon or hypothesis for spontaneous generation through his experiments. The hypothesis of spontaneous generation supported that live could originate from non-living things.

Through his experiments, he proved that only flies could give rise to other flies. He did experiments by keeping meat pieces in a sealed and in an open jar. The absences of the flies in the sealed jar proved that meat could not give rise to flies and only flies gave rise to other flies.

Final answer:

The correct option is B. Flies were not found in the sealed jars of rotting meat. Redi's experiment demonstrated that maggots only developed in rotting meat when flies had access to it, not in sealed jars, hence disproving spontaneous generation.

Explanation:

Francesco Redi conducted an experiment that is considered one of the first to challenge the theory of spontaneous generation—the belief that living organisms could arise from nonliving matter. In his experiment, he used jars with rotting meat to demonstrate his hypothesis that maggots only arose when flies had contact with the meat. Redi's findings showed that flies were not found in the sealed jars of rotting meat, supporting the idea that maggots were the offspring of flies and not a product of spontaneous generation. As a result, option B is the correct answer.

Answer: In order to survive, ecosystems need five basic components: energy, mineral nutrients, water, oxygen, and living organisms.

Explanation: google

An ecosystem must contain abiotic factors, producers, consumers, decomposers, and energy flow to survive indefinitely.

An ecosystem must contain the following five components to survive indefinitely:

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Answer:

The possible symbol representation and phenotypes will be :

Homozygous dominant:  TT, the phenotype will be tall height.

Heterozygous: Tt, The phenotype will be tall height.

Homozygous recessive: tt, the phenotype will be short height.

Genotype can be described as the genetic makeup of an organism which occurs due to the different alleles present in an organism. The phenotype can be described as the physical appearance of traits in an organism.

Answer: cell

Explanation: because an organ nor a eyelash is bigger

The picture says it all hope this helps someone

Explanation:

Answer: A base

Explanation: pH is the measure of the alkalinity or acidity of a substance. In a pH scale, the values ranges from 1 to 14, substances having lower pH values are said to be more acidic while substances with higher pH values are more alkaline or basic. Substances that have pH value of 7 is said to be neutral. pH values ranging from 1 to 6 is acidic while pH values from 8 to 14 is alkaline or basic.

A substance with a pH of 10 is called a base.

A substance with a pH of 10 is called a base. pH is a measure of the acidity or alkalinity of a substance, with pH values ranging from 0 to 14. pH values below 7 indicate acidity, while pH values above 7 indicate alkalinity or basicity.

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The DNA, RNA or the RNA Polymerase of the infected cell would not be virus's primary source of heritable information because it has the ability to integrate into host cell and get itself replicated, also it causes infection so multiplication becomes necessary.

Explanation:

The virus has reverse transcriptase enzyme in them which works slightly different. It transcribes RNA into DNA and eventually gets integrated into the genome of the host. It is here the DNA in the host cell is transcribed and translated. Thus it is modelled to have RNA as genetic material.

When virus infects the living cell by a process called a lytic infection, it injects its genetic material into it to get replicated and increase its number and eventually bursts the infected cell. Since a virus causes infection, it has to increase in number so it uses its own genome to get replicated.

Answer:

I believe the options are:

1) Present day species developed from earlier species .

2) Some species die out when environmental changes occur .

3) Complex organism develop from simple organisms over time .

4) Change occurs according to the needs of an individual.

The answer is 4) Change occurs according to the needs of an individual.

Explanation:

Theory of Evolution:

Answer:

The condition of the Earth had to become favourable before it could support any form of life.

The formation of the different layers around the earth like the ozone layer was necessary before life could originate. Primitive species such as some prokaryotes were able to live in hydrothermal conditions during the initial times. With the passage of time, as the concentration of oxygen increased due to photosynthetic prokaryotes, situations became favourable for eukaryotic organisms to arise.

Answer:  Without seagrass, most areas where they currently live would be a seascape of shifting sand and mud. Mangroves and seagrass also filter pollutants, absorb excess nutrients from runoff, and trap sediments, helping to increase the clarity and quality of waters.

Explanation: there you go have a good day.

The reason why seagrass beds might filter excess plants should be explained below.

As without seagrass many areas where they presently live should be seascape for transforming the sand and mud. The mangroves and seagrass should also filter the pollutants, it absorbed the extra nutrients from running off also the sediments should be trapped so that the water quality should be increased.

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