Select the correct answer.
When do scientists consider a hypothesis valid?
A.
when the hypothesis is testable
B.
when the hypothesis is published in a scientific journal
C.
when more than one person supports the hypothesis
D.
when experimentation shows it to be true

Answers

Answer 1

Answer:

A.

Explanation:

It must be testable and it must be falsifiable. If a hypothesis cannot be tested by making observations, it is not scientific.


Related Questions

Proteins are the most complex organic compounds. What determines how proteins are produced?.

Answers

Proteins are the maximum complex organic compounds that DNA presents as the instructions for making needed proteins.

The type of RNA that contains the records for creating a protein is known as messenger RNA (mRNA) because it contains the records, or message, from the DNA out of the nucleus into the cytoplasm.

The facts to make proteins are stored in an organism's DNA. every protein is coded for through a selected section of DNA called a gene. A gene is the section of DNA required to produce one protein.

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Which of the following sometimes precedes the formation of a tornado?
Wall cloud
Cumulus clouds
Hail
Nimbus cloud

Answers

Answer: Hail precedes tornados.

Haillllllllllllllllllllllllllllllllllllllll

To be activated, skeletal muscle fibers must receive neurotransmitter from neurons. What structure must neurons penetrate to activate the myofiber?.

Answers

To activate the myofiber, neurons must pass through the endomysium structure. Skeletal muscle fiber's also require neurotransmitter from neurons in order to be activated.

Axon branches of somatic motor neurons also supply each muscle fibre in skeletal muscles, signaling each fibre to contract. Skeletal muscles cannot function without the nervous system's signaling, unlike cardiac and smooth muscles, which can. Muscle fiber's in the skeleton.

A thin layer of areolar connective tissue called the endomysium, which means "within the muscle," surrounds each individual muscle fibre or muscle cell. It also has nerves and capillaries. The sarcolemma is what lays on top of the cell membrane of the muscle fibre. The tiniest and most deeply seated part of muscle is the endomysium.

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Field crickets, Gryllus pennsylvanicus, breed in late summer and leave only eggs to survive the winter. One local population increased from 2802 to 6815 in one year. Predict the size of this population 4 years after the initial year, assuming no significant change in the environment.

Answers

This population will be 76,382,520 in four years, according to the exponentially growing equation Nt = N0ert.

What would you say about the exponential growth?

A function called exponential growth depicts population expansion that happens consistently across time. You can suppose that data expands exponentially when populations double or triple in size. Exponential decay, which occurs when data contracts rather than expands, is the opposite of exponential growth.

Exponential growth occurs where?

One: Rapid population growth Populations experience exponential expansion when resources are limitless, creating a J-shaped curve. Populations grow logistically when resources are scarce. In logistic growth, population growth slows down as resources are scarcer.

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Many chemical preservatives, such as potassium sorbate, preserve food products in which of the following ways? by drying foods.
by altering pH
by changing osmolarity
by binding to pathogens

Answers

Answer: By altering pH

Consider the image. In the figure shown; what could the hormone Indicated by the small hexagon In the red circle be?
testosterone
growth hormone
ADH
insulin

Answers

Testosterone is the hormone Indicated by the small hexagon in the red circle.

What is testosterone?

Testosterone is the primary sex hormone and anabolic steroid in males. In humans, testosterone plays a key role in the development of male reproductive tissues such as testes and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.

Testosterone is the male sex hormone that is made in the testicles. Testosterone hormone levels are important to normal male sexual development and functions. During puberty (in the teen years), testosterone helps boys develop male features like body and facial hair, deeper voice, and muscle strength.

Testosterone is a sex hormone that plays important roles in the body. In men, bone mass, fat distribution, muscle mass and strength, and the production of red blood cells and sperm. A small amount of circulating testosterone is converted to estradiol, a form of estrogen.

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which processes produce different proteins in different cells from the same primary transcript? select all that apply.

Answers

Two processes that produce different proteins in different cells from the same primary transcript are RNA editing and alternative RNA splicing. These two change the protein in different cells, although all the cells have the same gene.

What is RNA modification?

The gene makes the mRNA, but the primary mRNA of eukaryotes is immature because the mRNA has both the intron and the exon regions. The introns are removed by the process of splicing, but in alternate splicing, the exons change positions. This is the result of the alternation of the traits that are found in the cells.

Hence, both RNA editing and alternative RNA splicing produce different proteins in different cells from the same primary transcript.

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The question is incomplete. The complete question  is follow

Which of the following processes produce different proteins in different cells from the same primary transcript? (Select all that apply.)

a)alternative splicing

b)chromatin remodeling

c)RNA editing

d)combinatorial control

e)histone modification

How many sperm cells are formed from an original cell in a falcon at the conclusion of meiosis?

Answers

Answer:

four are formed

Explanation:

Answer: At the end of meiosis, four haploid cells have been produced, but the cells are not yet gametes. The development of haploid cells into gametes is called gametogenesis. Spermatogenesis produces four haploid sperm cells, while oogenesis produces one mature ovum.

Scientists, government leaders, and consumers have expressed a variety of opinions about the pros and cons of genetically modified (GM) farm crops. Which statement provides the strongest evidence in support of an argument in favor of GM crops?

Answers

Farmers who grow GM crops have much higher yields than farmers growing unmodified crops.

GMO seed patents are held by large companies which could drive up prices and drive small farmers out of business. Sticky ends are ligated by using the same restriction enzyme on both DNA molecules. The CRISPR system allows biologists to alter the nucleotide sequence of specific genes.

Selective breeding was perhaps the earliest form of biotechnology used by humans to improve the genetic traits of plants and animals. Biotechnology includes the use of science or technology to alter the genetic characteristics of certain plants or animals. There are many examples of biotechnology. Gene expression is controlled primarily at the level of transcription primarily as a result of proteins binding to specific sites on DNA.

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What are the two important genetic consequences of fertilisation?

Answers

Answer:

. The diploid chromosome number is restored (2n) 2. The genetic sex of the zygote is determined 

Explanation:

The two important genetic consequences of fertilization are that the fertilization deals with maintaining the genetic diversity of the organization.

What are the types of reproduction ?

There are two types of reproduction.One type is asexual reproduction and the other type is called as the sexual reproduction.

One important genetic consequences is that it maintain  the genetic diversity that the species will have same type of  genome will be recorded so as to  maintain the data for the future purposes.

Another point is that the genetic lines will try to help to diagnosis of the various genetic disorders along with the pedigree analysis so as to maintain the data.

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Lipase is a type of enzyme that breaks down lipids in your digestive system. It functions best at a pH range of 4 to 5; when a person takes an antacid tablet to relieve heartburn, the antacid increases the pH to around 7 in certain areas of the digestive system .

Which answer explains what would be caused by this change in pH?

A. The production of lipase molecules would decrease

B. The production of lipase molecules would increase

C. More lipids would be digested

D. Fewer lipids would be digested

Answers

Answer:

Fewer lipids would be digested.

Hope this helps!

What features developed between Platyhelminthes and Nematodesand the closest previous branch of the tree? They are related to all the other branches, how? What do they have in common with their closest relatives? What's different?

Answers

The primary distinction between Platyhelminthes and Nematoda is that the former are invertebrate types known as flatworms, whereas the latter are invertebrate types known as roundworms.The bodies of Platyhelminthes are flat, while those of Nematoda are cylindrical with tapering ends.Nematoda have gliding movements, whereas Platyhelminthes have thrashing movements.The acoelomate creatures are platyhelminthes, while the pseudo-coelomates are nematodes.On the other hand, Nematoda have a full digestive system, whereas Platyhelminthes only have a partial one.On the other hand, Nematoda have a full digestive system, whereas Platyhelminthes only have a partial one.On the other hand, Nematoda have a full digestive system, whereas Platyhelminthes only have a partial one.While Nematoda are members of the superfamily of protostomes known as Ecdysozoa, Platyhelminthes are members of the superfamily of protostomes known as Lophotrochozoa.Nematoda were further divided into two classes, while Platyhelminthes were further divided into three classes.

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Question 3 of 10
Which activity is an example of a comparative investigation?
OA. Collecting and analyzing data about water quality in two different
wetland areas
OB. Testing the effects of pesticides on the growth rates of fish native
to a wetland
OC. Observing and recording the nesting habits of a species of bird
living in a wetland
OD. Calculating the size of a bird population living in a wetland
BUBMER

Answers

A comparative investigation is Testing the effects of pesticides on the growth rates of fish native to a wetland. Option B.

Determining the boiling points of three different liquids and observing the external structure of two different insects with a hand lens are examples of comparative studies. Comparative studies can use a wide range of variables, but have no control group, while experimental studies include variables that can be controlled.

Comparative study questions should be stakeholder relevant and have an overall focus. Comparative studies are used to determine and quantify the relationship between two or more variables by observing different groups exposed to different treatments either voluntarily or as a result of circumstances. A comparative study examines two or more similar groups of individuals or conditions in comparison to each other.

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How are signals transmitted using neurotransmitters?

A: From the synapse to the presynaptic cell, and then to the postsynaptic cell

B: From the postsynaptic cell to the presynaptic cell across a synapse

C: From the presynaptic cell to the postsynaptic cell, and then to a synapse

D: From the presynaptic cell to the postsynaptic cell across a synapse

Answers

C: From the presynaptic cell to the postsynaptic cell, and then to a synapse

From the presynaptic cell to the postsynaptic cell across a synapse. Therefore, option (D) is correct.

What are neurotransmitter?

Neurotransmitters are chemical messengers that allow communication between neurons in the nervous system. When an action potential (electrical signal) reaches the presynaptic cell, it triggers the release of neurotransmitters from small vesicles located in the presynaptic terminal. These neurotransmitters are then released into the synapse, which is the small gap between the presynaptic cell and the postsynaptic cell.

The released neurotransmitters diffuse across the synapse and bind to specific receptors on the postsynaptic cell. This binding of neurotransmitters to receptors initiates a series of biochemical and electrical changes in the postsynaptic cell, transmitting the signal from the presynaptic cell to the postsynaptic cell. These changes can either excite or inhibit the postsynaptic cell, depending on the type of neurotransmitter and receptor involved.

Overall, signals are transmitted using neurotransmitters by being released from the presynaptic cell, crossing the synapse, and binding to receptors on the postsynaptic cell, allowing for communication between neurons in the nervous system.

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Which type of stem cell is able to differentiate into any cell type, including extraembryonic placental cells?.

Answers

Extraembryonic placental cells are one of the several cell types that totipotent stem cells can differentiate into.

What do you mean by Totipotent stem cell?

Totipotent stem cells, which can also reach the germ line and pass on genetic information to succeeding generations, can produce all adult cell types. Zygote or fertilized egg is totipotent stem cell. The well-known totipotent stem cells are only present in the early embryonic tissues and are typically derived from the first few cell divisions following fertilization.

In vitro fertilization (IVF), a procedure in which sperm and eggs (ova) acquired by laparoscopic surgery are placed in culture dishes and allowed to pair, can produce totipotent stem cells from fertilized eggs.

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Which cells are responsible for building up bone to increase calcium levels in the blood?

Answers

Answer:osteoblasts, osteoclasts, osteocytes, and osteoprogenitor cells.

Explanation:

Bone consists of four types of cells: osteoblasts, osteoclasts, osteocytes, and osteoprogenitor cells. Osteoblasts are bone cells that are responsible for bone formation.

Answer:

osteoblasts, osteoclasts, osteocytes, and osteoprogenitor cells.

Explanation:

The variety of organisms within an ecosystem is characteristic of which type of diversity?.

Answers

The variety of organisms within an ecosystem is characteristic of species diversity. Species diversity is the variety of different species that are present in an ecosystem.

Species diversity is the variety of life on earth. It is the number of different species of plants, animals, and other organisms that live in a particular area. The higher the diversity, the more different types of life there are.

Species diversity is important for the health of ecosystems. It helps to provide stability and resilience against environmental changes. It also helps to provide food and other resources for the animals and plants that live there.

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Is starch as effective as sugar(glucose, succinate) at cellular respiration?

Answers

Answer: no

Explanation:

no, because starch is a polymer

Categories into which children actively organize the behaviors, activities, and attributes of others are called gender ________.

Answers

Gender schemas are categories that kids actively use to categorize other people's actions, traits, and behavior's. In 1981, psychologist Sandra developed the gender schema theory.

Asserted that kids pick up on gender norms from the culture they grow up in. The hypothesis contends that toddlers begin to conform their behavioral to cultural gender standards throughout the earliest phases of social development. Is called Gender schemas.

A psychologist is a specialist who investigates behavior's, perceptual, cognitive, emotional, and social processes as well as mental states. psychologist work frequently entails investigation, observation, and interpretation of how people interact with one another and their surroundings.

In particular, having strong gender schemas gives you a filter through which to process all environmental stimuli. This enables the individual to absorb stereotypical information more readily. This serves to reinforce gender stereotypes already in place.

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An 0.714 mol sample of krypton gas at a temperature of 20.0°C is found to occupy a volume of 25.6 liters.

The pressure of this gas sample is —— atm.
Pls help!!! Asap

Answers

The pressure of the gas sample is 4.64 atm.

What is pressure?

Pressure is defined as the force applied perpendicular to the surface of an object per unit area over which the force will be applied.  The SI unit of pressure is pascal or N m⁻².  There are basically three types of pressure absolute pressure, differential  pressure and gauge pressure. Pressure can also be expressed as force per unit area.  

Given n= 0.714 mole

T = 20.0 °C

V = 25.6 liter

R = 8.31 J/K/mole

As we know that

PV = nRT

P = nRT / V

P = 0.714 x 8.31 x 20.0 / 25.6

P = 4.64 atm

Thus, the pressure of the gas sample is 4.64 atm.

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What is carrying capacity? (answer in a complete sentence by restating the question)

Answers

Answer:

Carrying capacity is the maximum number of individuals of a species that an environment can sustain.

Explanation:

The maximum number of organisms that a system can sustainably support is known as carrying capacity. The ability of an ecosystem to replenish the food, water, environment, or other essentials that populations need to thrive are just a few examples of the numerous variables that may affect an ecosystem's carrying capacity for a certain species.

The idea of carrying capacity connects how many species an environment can support to its resources. Ecosystems cannot consistently go above their carrying capacity. A species will exhaust its supply of food, water, or other essentials when the population density of that species surpasses the ecosystem's carrying capacity. The population will soon start to decline. A population can only increase so much before it exceeds the environment's carrying capacity. Resources won't be available at that moment to support the long-term growth of the organization.

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7. Which of these is NOT a characteristic of happy people?
a. Happy people are optimistic
b. Happy people give more
c. Happy people have high self-esteem
d.Happy people like to be around other happy people

Answers

B isn’t a character’s of happy people

Happy people have high self-esteem is NOT a characteristic of happy people.

What is happy people?

Strong, meaningful relationships are formed as a result of these ties, which serve as a barrier against depression. In the past 50 to 75 years, depression rates have drastically grown.

According to the World Health Organization, depression will affect almost one-third of all adults worldwide and be the second biggest cause of mortality by the year 2020.

Although there are probably many factors causing this increase, one of the most significant ones might be the disconnect between individuals and their families, communities, and themselves.

Therefore, Happy people have high self-esteem is NOT a characteristic of happy people.

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Describe one function , brought about by the process of meiosis , that spermatogenesis and Oogenesis have in common

Answers

In both spermatogenesis and oogenesis, a diploid cell is multiplied several times in mitosis to produce precursors, which then go through two rounds of meiosis to produce haploid sperm and eggs.

What do spermatogenesis and oogenesis have in common?Spermatogenesis and oogenesis are both forms of gametogenesis, in which a diploid gamete cell produces haploid sperm and egg cells, respectively.With stem cells at the tube's outer edge and spermatozoa at its lumen, spermatogenesis takes place in the wall of the seminiferous tubules. The diploid, undifferentiated cells are located just underneath the tubule's capsule. These stem cells, known as spermatogonia (plural: spermatagonium), undergo mitosis, with one of the progeny differentiating into a sperm cell and the other producing the following generation of sperm.The ovaries' outermost layers are where oogenesis takes place. Oogenesis, like the production of sperm, begins with a germ cell known as an oogonium (plural: oogonia), but this cell goes through mitosis to multiply, ultimately leading to up to one to two million cells in the embryo.

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Which behavior of waves best explains why a house that is fully carpeted is more silent then a concrete house

Answers

Absorbed behavior of waves best explains why a house that is fully carpeted is more silent then a concrete house.

What do you mean by absorbed behavior of waves?

Absorption is when a wave comes into contact with a medium and causes the medium's molecules to vibrate and move. This vibration absorbs or takes some of the energy away from the wave and less of the energy is reflected. One example of absorption is black pavement which absorbs energy from light.

When a wave is absorbed, the matter takes in energy from the wave and, in doing so, lowers the amplitude. For example, when a sound wave hits foam padding, the energy travels through the material and is sometimes converted into heat or other forms of energy.

If a material or matter absorbs light of certain wavelengths or colors of the spectrum, an observer will not see these colors in the reflected light. On the other hand, if certain wavelengths of colors are reflected from the material, an observer will see them and see the material in those colors.

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Paradox of the slavish existence in paragraph 5

Answers

Marx expected this class to expand and existence, create revolution, establish a dictatorship of the proletariat, and start to build a communist society.

The important situations for the lifestyles and for the sway of the bourgeois magnificence is the formation and augmentation of capital; the circumstance for capital is salary-labour. Salary-labor rests solely on opposition between the laborers.

The bourgeoisie are for that reason unfit to rule, because they can not assure an existence to its slave within its slavery. Consequently, with the development of cutting-edge industry, the bourgeoisie produces its personal grave-diggers. Its fall and the victory of the proletariat are similarly inevitable.

Marx argued that capital creates its own gravediggers is the proletariat. Marx anticipated this magnificence to increase, create revolution, set up a dictatorship of the proletariat, and begin to construct a communist society. He anticipated this to occur first inside the most exceptionally evolved capitalist, commercial international locations.

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If pyruvate processing is blocked, what will happen to the levels of oxaloacetate and citrate in the citric acid cycle?.

Answers

There will be an increase in oxaloacetate and a reduction in citrate.

What transpires if pyruvate oxidation is stopped with regard to oxaloacetate?

How will the levels of oxaloacetate and citric acid in the citric acid cycle depicted in the accompanying image change if pyruvate oxidation is prevented? Citric acid will decrease while oxaloacetate builds up.

The function of oxaloacetate in the citric acid cycle?

The citrate synthase enzyme catalyzes the reaction between oxaloacetate and acetyl-CoA to produce citrate, an intermediate of the citric acid cycle. Additionally, it participates in the processes of gluconeogenesis, urea cycle, glyoxylate cycle, amino acid synthesis, and fatty acid synthesis. Oxaloacetate is another effective complex II inhibitor.

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Resistance training decreases blood flow to your muscles.
O True
O False

Answers

Answer:

false

Explanation:

Doing one resistance training routine gets more blood flowing through your body because it widens your blood vessels.

Flagella are found in______and used for_____.
A. plants, transfer of genetic material
B. fungi, locomotion
C. prokaryotes, transfer of genetic material
D. prokaryotes, locomotion

Answers

D. Prokaryotes, locomotion

5. Divide the following signed numbers:
please help will give extra
a.

-8
-2

b.

+9

-1

c.

-12

-48

Answers

Answer:

-8-2=-10

+9-1=8

-12-48=-60

Explanation:

in a population of 100 individuals, we have 25 people that are homozygous AA, 50 people that are heterozygous Aa, and 25 people homozygous aa. How many A alleles are in the homozygous AA group?

Answers

The number of A alleles that are in genotype AA group is 50 A alleles.

Based on the information given we were told that 25 people are genotype AA group.

Since each human with genotype AA have two dominant alleles which means that the number of A alleles that are in the AA group is 50 which is calculated as:

A alleles= Genotype AA × 2 dominant alleles

A alleles= 25 people× 2 dominant alleles

A alleles= 50 A alleles

Inconclusion the number of A alleles that are in the AA group is 50 A alleles.

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