How many variables can a scientist change during a scientific investigation?

Answers

Answer 1

Answer:

Three

Explanation:


Related Questions

how do you think the endocrine system and the nervous system work together to control communication in the body?

Answers

Explanation:

Ans. They use the help of the brain and nerves

if a man with type ab blood marries a woman with type o blood, what blood types would you expect in their children

Answers

Answer: the child could be  A or B  blood type

how do monosaccharides combine to form polysaccharides

Answers

Through condensation reactions

During fertilization, each haploid ____________ contains the entire genetic contribution from one of the two parents.

Answers

During fertilization each haploid gamete

What is XX and XY? And which are their differences?

Answers

Answer:

chromosomes

Explanation:

the diefference is that one is combination of female genes and the other a combination of female with male genes

The liquid part of blood is called ?​

Answers

Answer:

Plasma

Explanation:

the anterior pituitary hormone that controls the release of glucocorticoids from the adrenal cortex is __________.

Answers

Answer:

Adrenocorticotropic Hormone (ACTH)

Explanation:

Explanation:

Adrenocorticotropic hormone (ACTH)

Explain how homologous structures are used as a source of evidence to infer evolutionary relationships between modern and fossil organisms

Answers

Answer:

Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations.

Explanation:

Analogous structures demonstrate that identical selective pressures might result in similar adaptations, whereas homologous structures indicate evidence for shared ancestry.

What are analogous structures?

In contrast to homologous structures, analogous structures are characteristics of different species that have evolved in response to a similar environmental challenge and are similar in function but not necessarily in structure.

While comparable structures demonstrate that similar selective pressures can result in similar adaptations, homologous structures suggest that they have a common ancestor (beneficial features).

Therefore, homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations.

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Haven't Answered a Question lately So I'll ask
What are the top three fastest animals in the world?

Answers

Answer:

cheetah golden eagle white throated needletail Swift

First, is the Peregrine falcon, then the Golden eagle, and finally, the white throated needle tail swift.
1. Peregrine Falcon
2. Golden Eagle
3. White Throated Needle-tail sSwift

Summarize the relationship between DNA,
genes, and chromosome

Answers

DNA is in the chromosome… DNA displays the gene

Fertility is the measure of the ability to become __________. What one word completes the sentence

Answers

Fertility is the measure of the ability to become a parent.

FERTILITY:

Fertility is a phenomenon that describes the ability to reproduce or produce offsprings.

Reproduction is one of the characteristics of living things and the ability to successfully execute this characteristics is termed fertility.

The opposite of fertility is sterility, which means the inability to produce offspring or reproduce.

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100 POINTS PLEEEEEEEEEEEEEEEAAAAAAAAAAASSSSSSSEEE

Answers

Answer:

claim: muscles

Evidence: usable energy

Reasoning: your breathing increases

Explanation:

Answer:claim: musclesEvidence: usable energy Reasoning: your breathing increases

Explanation:

citer le type de mémoire perturbée par le T H C c,est un dm note reponse.​

Answers

hindi ko po gets sasagutan po ba yan

in _________, enzymes cut DNA into fragments, which are separated by size to form a pattern of bands.

a. selective breeding
b. cloning
c. dna fingerprinting
d. protein synthesis

Answers

Restriction enzyme analysis

what are the advantages of using an electron transport chain

Answers

Answer: The advantages of electron transport chains are directed

towards living things. Electron transport chains permit the cell to take energy from harvesting electrons .

Explanation: Read above.

Label the following with
N (neutron), P (proton),
E (electron)
___Negative charge
___ Atomic number ___determination
___ Atomic mass determination
___ Involved in bonding
___ Positive charge
___ when gained or lost creates ions
___ Neutral charge
___ Found in nucleus

Answers

Answer:

E, P, N and P, E, P, E, N, N and P

Explanation:

I am pretty sure the answers would go like this (in the order you have here):

1. Electron (they have a negative charge)

2. P (The atomic number is determined by the number of protons)

3. N and P (The atomic mass is determined by how many Neutrons and Protons there are in the atom)

4. Electron (they are usually involved in bonding)

5. Proton (they have positive charge)

6. Electron (ions are created when an atom has gained or lost electrons)

7. Neutron (they are neutral)

8. Both Neutrons and Protons (they stick together inside the nucleus)

I am not entirely sure why the atomic number determination has 2 blanks since it is only determined by protons, but I hope this helps. I havent studied this for a while but those are the best answers I can provide and have checked them with my books so I hope they are correct. Good Luck!

Dragon

Which of the following is an example of the phenotype?
Question 7 options:


The cow is brown


The wheat is planted in the spring


The community raises rice and millet


The sheep graze freely in the hills

Answers

Answer:

The cow is brown

Explanation:

Which of the following is surrounded by two phospholipid bilayers?
a) Ribosomes b) the vesicles
C. CYTOPLASM
D) THE NUCLEOPL

Answers

Answer:

D. THE NUCLEOPLASM.

Explanation:

I think there is a typo in your option but that's fine! I understand.

Which three terms could be used to identify the carbon (c) in this chemical equation

Answers

Answer:

element product atom

Explanation:

what is the role of the beaver in its ecosystems?
a) it is a foundation species and the main source of food for the natural predators of its ecosystems.
b) it is a keystone species that modifies its natural environment by damming streams to form wetlands
c) it is a dominant species, as it has the greatest number of individuals among all the mammalian species of its ecosystem
d) it is an endangered species as it has the least number of individuals among all the mammalian species of its ecosystem

Answers

Answer:

B)

Explanation:

When carbohydrate intake is low, which of the following is most likely to result?

a. Your ur body will starve

b.your body will store more fat

c.your energy will use more energy

d.your body will break down other nutrients for energy

Answers

Answer:

d

Explanation:

e.g protein is used in the absence of carbohydrates

D is the correct answer because in absence of carbohydrates protein is used instead

As DNA replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two component strands.

a. True
b. False

Answers

Answer:

As DNA replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two component strands. This unwinding and separating of the DNA require three different types of proteins: helicase, topoisomerase, and single-strand binding proteins.

Explanation:

3 More Days Till Christmas

DNA and RNA are ______ that serve as templates that form proteins

Answers

Answer:

In the first step, the information in DNA is

transferred to a messenger RNA (mRNA)

molecule by way of a process called

transcription.... The mRNA sequence is

thus used as a template to assemble-in

order-the chain of amino acids that form a

protein.

A type of RNA that is called as ribonucleic acid type called as transfer RNA that is used for the production of the amino acid at a time and the protein assembly takes place at the ribosomes.

What is the role of DNA and RNA for the sake of protein synthesis ?

       

DNA are responsible for the providing out the code for the cell's activities and the RNA are responsible for providing out the service to make them proteins.

Each group of 3 bases in the  mRNA constitutes a codon and each codon is specifying  a particular type  of  amino acid. The mRNA sequence therefore used as a template to make the  assembly in order of the chain of amino acids which form a protein.

It is found that in all biological cells , usually occurs in cytoplasm of cell though its production takes place in nucleus. Whereas DNA is  providing the code for cell's activities and RNA is responsible for converting that code into proteins which carry various cellular functions.

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• What is chlorophyll ? ​

Answers

Explanation:

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A green pigment in leaves which helps to capture the sun's energy

CHLOROPHYLL -:

chlorophyll is the green coloured pigment and the most significant among photosynthetic pigments five types of role of error found in higher plants and elegant they are chlorophyll a, b ,c ,d and e are among these chl-a is the universal photosynthetic bacteria role of is also widely distributed in RBI approved and again but absent in some algae chlorophyll a and CHL blue green and yellow green in colour respectively Chlorophyll found and photosynthetic bacteria also they are Bacteria chlorophyll A and B 650 and 600 chlorophyll pigment are soluble in organic solvents

What do you call a substance with a pH of 6?

Answers

Answer:

i copied this i just hope it helps if not i dont know

Explanation:

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. ... Water with a pH of five is ten times more acidic than water having a pH of six. As this diagram shows, pH ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline

There is an error in the above model.
(a) What is this a model of? (2pts)
(b) Explain how you would change the model to make it correct? (2pts)

Answers

ATP hydrolysis is the lysis of the molecule mediated by water. It releases a phosphate group and energy. It is a reversible reaction. (a) Reversible ATP hydrolysis. (b) added energy on the left and released energy on the right.

   

------------------------

ATP is a significant molecule involved in many of the cellular metabolic routes. These metabolic processes can either form it or break it.

ATP provides energy to many different functions in the organism.

ATP means adenosine tri-phosphate. It is composed of adenosine (an adenine plus a ribose), and three phosphate groups.

Note: you can also find adenosine Diphosphate (two phosphates) and adenosine monophosphate (one phosphate).

Oxygens from the phosphate groups only have a single bond to phosphate (there are no hydrogen bonds).

These single bonds, known as phophoanhydrid bonds, have a negative charge and tend to repel each other, making the molecule unstable.

So phosphate groups repel each other, and a considerable amount of energy is applied to keep them united. So phophoanhydrid bonds are high energetic bonds.

The forces that keep the phosphate groups together accumulate potential energy.  

If these bonds are broken, part of this potential energy would be released.

When talking about breaking the molecule, we are referring to ATP hydrolysis. And the released energy is used in different cellular processes that require energy.

ATP Hydrolysis is the molecule lysis mediated by a water molecule.

                      ATP  +  H₂O   ⇄   ADP  +  Pi  +  Energy

Pi is the released inorganic phosphate group.

This is a reversible reaction, meaning that the ADP can go back to ATP.

                 ADP  +  Pi  +  Energy   ⇄   ATP  +  H₂O

(a) What is this a model of?

This model represents the reversible ATP hydrolysis.

In the superior part of the image, we can see an ATP molecule composed of adenine, ribose, and three phosphate groups. The yellow star behind represents the accumulated energy.

When ATP hydrolysis, it loses a phosphate group and part of the energy that was keeping this group in the molecule.

An ADP is composed after hydrolysis. We can see this molecule in the inferior area of the image.

ADP molecule is composed of adenine, ribose, and two phosphate groups.

Because hydrolysis is a reversible process, by adding a new phosphate inorganic group and energy, we can get a new ATP.

(b) Explain how you would change the model to make it correct?

What is wrong with this model is that instead of showing released energy during the hydrolysis process, it shows energy added to the reaction.

In the same way, instead of showing added energy to the reversible reaction, it shows released energy.

Added energy and released energy must be changed.

Added energy should be on the leftReleased energy should be on the right

---------------------------------

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26.
Which of the following food chains
shows one way that energy moves
through an ocean ecosystem?
A fish plankton + whale → squid
B squid whale fish plankton
C plankton squid fish whale
D whale fish plankton → squid

Answers

Answer:

C

Explanation:

ans is C Wait a minute, I'll be right back.

Plz help quickly I’ll mark

Answers

Answer:

Carbon Monoxide

Explanation:

I just took the test :)

Which of these describe biodiversity?

Answers

Answer:

variation in species living in an ecosystem.

What are macromolecules that contain carbon, hydrogen, oxygen, and nitrogen, needed by the body for growth and repair?

Answers

Answer:

protein

Explanation:

A macromolecule that contains carbon, hydrogen, oxygen, and nitrogen, which is used by the body for growth and repair. Protein Synthesis.

This is a two-part process that ends in the assembly of proteins at the ribosomes within cells.

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