In this case, the number of cells at each stage of cell division represents the dependent variable, the time spent in each cycle is the independent variable and the controlled variable may be presented by the media that contain all cells.
What is a dependent experimental variable?A dependent experimental variable (such as in this case the number of cells on a specific phase of the cell cycle) can be defined as any experimental condition that is modified by the change in the independient variable (in this case time is the independent variable).
Moreover, controlled variables are all those conditions that are maintained in equal conditions for all experimental treatments such as for example, the media used to grow cells.
Therefore, with this data, we can see that the dependent experimental variable changes due to the modification suffered by the independent variable.
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the pathological condition of the myocardium that is reversible and caused by a lack of oxygen to the tissue is:
The pathological condition of the myocardium that is reversible and caused by a lack of oxygen to the tissue is angina.
Angina is caused by reduced blood flow to the heart muscle. Blood carries oxygen, which the heart muscle needs to survive. When the heart muscle isn't getting enough oxygen, it causes a condition called ischemia.
Angina pain is often described as squeezing, pressure, heaviness, tightness, or pain in the chest. It may feel like a heavy weight lying on the chest. Angina may be a new pain that needs to be checked by a health care provider or recurring pain that goes away with treatment.
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The carbohydrate produced by photosynthesis can be stored as starch in the leaf. A plant with variegated leaves used up its store of starch because it was placed in the dark. Explain why the plant used up its store of starch when it was placed in the darkThe carbohydrate produced by photosynthesis can be stored as starch in the leaf. A plant with variegated leaves used up its store of starch because it was placed in the dark. Explain why the plant used up its store of starch when it was placed in the dark
If I feel sick but haven’t thrown up and have ate and still feel sick am I actually sick?
Answer:
If you feel sick, I recommend just lying down on your bed for a few hours, it has always helped me. My mom always had me lie down on my bed like all day it seemed, and just relax and watch television, and even though I didn't want to go to bed, it really helped. I thank my mom for helping me. So, I highly recommend doing that if you feel sick. And, you should see if you have a thermometer to use to see how hot you are. If you are exceeding 99.8 degrees, that means you are most likely ill, and should lie down. But, if below that, you should be fine. But, if you still feel ill, just do what I suggested. It really helps.
Explanation:
May I have Brainliest please? My next rank will be the highest one: A GENIUS! Please help me on this journey to become top of the ranks! I would really appreciate it, and it would make my day! Thank you so much, and have a wonderful rest of your day!
How can fossils tell scientist about the past?
Answer: Fossils can tell scientists about the past by showing how the skeleton is structured so they can get an idea about what they ate, their limitations, and sometimes even how they acted or mated.
Explanation:
the human bacterial pathogen neisseria gonorrhoeae contains pilin, proteins that invoke an immune response. the amount of the pathogen eventually declines when the host antibodies recognize the pilin. however, the pathogen has replicated and have new pilin, so the old immune response is no longer effecive. this pathogen is successful in the host because:
Pathogen Neisseria gonorrhoeae is capable of evading host immune defenses through a variety of mechanisms, including ongoing alterations in the antigenic structure of its surface, resistance to complement-mediated bacteriolysis, and perhaps the synthesis of IgA1 protease.
The effects of gonorrhea on the body?The body may use inflammatory cells like neutrophils to fight off NG invasion in the case of a gonococcal infection, or it may start its adaptive immune response by presenting an antigen to get rid of the pathogen. The infection is challenging to eradicate due to NG's numerous immune escape strategies.
Can you become resistant to gonorrhea?It is generally known that gonorrhea can be contracted repeatedly without any visible development of a protective immunity due to prior infections. A purulent discharge is a sign of symptomatic infection, but it is unclear how the host will react.
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Eggs mature in the________
of the
female reproductive system. What
one word completes the sentence?
Enter your answer
Eggs mature in the ovaries of the female reproductive system.
Eggs in female refers to the female germ cells also called the ovum. It is a haploid structure that gets fertilized by a male germ cell in order to give rise to offspring. Egg is said to the largest single cell in the female body. It has no flagella and hence cannot move.
Ovaries are the gland or the reproductive organs that are involved in the production of female germ cell called the egg. In human females, there exists a pair of ovaries that consists of thousand of ova stored in it. Apart from ovum, these ovaries also synthesize some hormones.
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Question 1 (1.5 points)
Why did environmental policies became essential as the US population began to
grow more quickly?
Environmental policies became essential as the US population began to
grow more quickly because as more individuals acted out of self respect rather than communal goods, resources began to be depleted and is denoted as option D.
What is a Policy?
This is referred to as a general guideline that is used as a basis for making decisions. There are different types of policies and in a country are usually passed by the government after meeting the requirements stated in the constitution.
Population and availability of resources have a direct relationship. As population began to increase, the need for resources began to increase also which is why there was the need for the provision of environmental policies so to make sure that there is no scarcity and makes it the correct choice.
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Marine science
Crest is to high, as trough is to
a. low
b. fast
c. time
d. shallow
The option (A) is correct. Crest is to high, as trough is to low.
What do you mean by crest and trough?The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height.
Moreover, a crest is a point on the wave where the displacement of the medium is at a maximum. A point on the wave is a trough if the displacement of the medium at that point is at a minimum.
Therefore, while a transverse wave has an alternating pattern of crests and troughs, a longitudinal wave has an alternating pattern of compressions and rarefactions. As discussed above, the wavelength of a wave is the length of one complete cycle of a wave.
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What is gravitation lensing and how does it cause arcs of light around galaxies
Gravitational lens can occur when a huge amount of matter, like a cluster of galaxies, creates a gravitational field that distorts the light from distant galaxies.
Gravitational lensing is a powerful tool that affects the clustering components in the universe by effecting gravitational field on light from background sources.
When the light from other galaxies passes by massive objects in the universe, the gravitational pull from these objects can distort or bend the light. The gravity of the massive focal point were galaxy is acting like a magnifying glass as it traps light and this effect called gravitational lensing.
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100 points and brainlest if answer is right
Answer:
Evolved first
Explanation:
Prokaryotic cells Evolved to other forms of organelles (mitochondrial and chloroplast)in the eukaryotic cells
And with regards to the other options available can not only be with respect to Prokaryotic cells because other cell possess plasma membrane, ribosomes and DNA as well
Answer:
c) Evolved first
Explanation:
Eukaryotic cells started to form after the evolution of prokaryotes.
So, the characteristic of prokaryotic cells is that they evolved first. Hence, the option (c) is the correct answer.
according to the punnet square offpsirng from these parents have a (fill in the blank) chance of inheriting one b allele and one b allele
According to the punnet square offspring from these parents have a 50% chance of inheriting one B allele and one b allele,
The genotypes of a certain cross or breeding experiment are predicted using the Punnett square, a square diagram. It bears Reginald C. Punnett's name, who developed the method in 1905. Biologists use the figure to calculate the likelihood that a child will have a specific genotype.
The term "allele" is used to refer to a gene's alternate form or variants. For each autosomal gene, one allele is inherited from each parent, and we often group the alleles into groups. Usually, we refer to them as normal, wild-type, aberrant, or mutant alleles.
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Explain the role of living things in the nitrogen cycle.
- 7th grade science
The role of Living Organisms is to convert the dead and decaying matter to ammonia(NH₃) in the nitrogen cycle.
Plants require nitrogen to make proteins DNA, RNA, ATP, etc. The nitrogen cycle is a process in which plants convert nitrogen into nitrates. This can be done by volcanic action, lightning, industrial activity, and by some bacteria.
These bacteria are the living organisms that use the plant as a carbohydrate source of energy and shelter and in turn, the plant uses the nitrate the bacteria produces for nitrogen fixation. The nitrates are then converted into plant and animal proteins, DNA and RNA.
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What occurs inside of a cell while it is performing the process of respiration? (1 Point)
The negative charge inside of the cell is used to increase the concentration chemicals inside of the cell
Sugar is broken down to generate adenosine triphosphate (ATP) molecules that are used for energy
Light reactive chemicals combine carbon dioxide (Co2) and water to form glucose molecules that are stored as
food[object Object]. Incorrect answer
The cell membrane forms around air bubbles to create a vacuole that is used to separate the oxygen from the
rest of the air
Sugar is broken down to generate adenosine triphosphate (ATP) molecules that are used for energy occurs inside of a cell while it is performing the process of respiration
In the cellular respiration glucose and oxygen react to form ATP and water and carbon dioxide are released as byproduct and the three stages of aerobic cellular respiration are glycolysis and the Krebs cycle and oxidative phosphorylation and glycolysis take place in the cytosol and the citric acid cycle occur in the mitochondrial matrix and all living organism need energy to carry out daily life process and respiration is considered to be the key process during which several reaction take place and sugar is broken down inside the cell
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The function of hemoglobin is to carry ________ from the lungs throughout the body.
Answer: Oxegyn or blood
Explanation: It is either one of these choices.
Two nucleotides on the same strand form a __________ bond while two complimentary bases on opposite strands form ____________ bonds. An a-t base pairing forms _____ such bonds.
Two nucleotides on the same strand form a Phosphodiester bond while two complimentary bases on opposite strands form Hydrogen bonds. An a-t base pairing forms 2 such bonds.
The constituent components that make up DNA's double-helix structure are known as nucleotides. Each nucleotide has a base in it. The four various colors you see here stand for the four different bases that might be used. Between nucleotides, a unique kind of covalent link known as a phosphodiester bond occurs. The two strands of DNA are formed by these phosphodiester linkages.
Hydrogen bonds are the bonds that develop between base pairs. Thymine and adenine make two hydrogen bonds, and guanine and cytosine form three hydrogen bonds. Therefore, we have concluded that hydrogen bonds are the type of binding that develops between base pairs in DNA to hold the two strands of a double helix together.
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imagine a set of twins who are identical but do not look exactly identical (some traits differ). the study of how factors other than dna have influenced their occurrence of specific traits is known as
Epigenetics is the study of how things other than DNA have affected how often certain traits occur.
The terms "genetics" and "epigenetics" mean?The study of heredity and the diversity in inherited traits is known as genetics. Epigenetics: Epigenetics is the study of inheritable alterations in organisms brought on by altered gene expression.
What exactly does the term "epigenetics" mean?The study of epigenetics focuses on how DNA-unchanged cells regulate gene activity. The word "epigenetic" refers to factors other than the genetic code. In Greek, "epi-" means on or above. Gene activation is regulated by changes to DNA's epigenetic state, which can occur during development.
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what is meant by translocation? view available hint(s)for part f what is meant by translocation? the two ribosomal subunits are joined in a complex. the ribosome slides one codon down the mrna. the polypeptide chain grows by one amino acid. the completed polypeptide is released from the ribosome.
The ribosome slides one codon down the mRNA. Option B.
Transcription is the technique of the producing of RNA from DNA. Translation is the gadget of the formation of protein from RNA. Translocation is the motion of substances in vegetation from the leaves to other elements of the plant. Translation takes area at the ribosome, which includes rRNA and proteins. In translation, the instructions in mRNA are take a look at, and tRNA brings the perfect collection of amino acids to the ribosome.
Metabolic techniques, particularly the products of photosynthesis are transported from the leaves in which they may be formed to unique factors of the plant. This shipping of soluble photosynthetic products is known as translocation and takes vicinity in a part of the vascular tissue called the phloem. A mutation wherein non-homologous chromosomes change stretches of DNA. Autosomal issues. Autosomal troubles affect each women and men.
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In guinea pig, rough coat i dominant (R) to mooth coat (r) and black coat (B) i dominant to white coat (b). A rough black guinea pig bred with a rough white one produce 29 rough black offpring, 31 rough white offpring, 11 mooth black and 9 mooth white. Give the genotype of the parent, punette quare
RrBb (rough, black) and Rrbb (rough, white) are the genotypes of the parents guinea pigs.
The parent genotype cannot have RR alleles for their coat because the smooth coat phenotype is present in the offspring. Similar to this, the rough, black parent is unable to have BB alleles in its genotype because doing so will prevent its offspring from having a white coat color. This can be understood with the help of the punnet square given in the answer. Therefore, the probability for each phenotype would be as follows:
rough black- 3/8 rough white- 3/8 smooth black- 1/8 smooth white- 1/8A dihybrid cross is made up of two people who share two traits that are controlled by two different genes. The idea of a dihybrid cross was developed as a result of Gregor Mendel's observation of pea plants that were either round or wrinkled, yellow or green.
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which of the following is unique to cardiac muscle cells? only cardiac muscle contains a sarcoplasmic reticulum. only cardiac muscle has gap junctions. only cardiac muscle is capable of autorhythmicity only cardiac muscle has a high concentration of mitochondria.
Only cardiac muscle cells shows autorhythmicity The unique feature of cardiac muscle cells is autorhythmicity .
Cardiac muscle cells (cardiomyocytes) are striated, branched, have a large number of mitochondria, and are controlled involuntarily.
Specialized cardiac muscle cells known as autorhythmic cells are where action potentials (electrical impulses) in the heart are thought to begin. These cells have the capacity to self-excite and produce an action potential without external nerve cell activation. The autorhythmic cells offer a conduction system to coordinate the contraction of muscle cells throughout the heart and act as a pacemaker to start the cardiac cycle (the heart's pumping cycle).
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Climate change affects the ocean by (1 point)
Climate change affects the ocean has absorbed the heat released by fuel and growing emissions.
How ocean affected by climate change?Currently, the ocean has absorbed around 90% of the heat caused by growing emissions. As the surplus heat and energy warm the water.
The temperature shift causes unprecedented cascade consequences like ice melting, sea-level rise, marine, and ocean acidification.
As greenhouse gases capture more solar energy, the seas absorb more heat, resulting in higher sea surface temperatures and increasing sea levels.
Therefore absorbing heat from the ocean from emission climate change affects it.
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i need help with biology
Answer: A, carboxyl group
Explanation:
which term most precisely describes the cellular process of breaking down large molecules into smaller ones? which term most precisely describes the cellular process of breaking down large molecules into smaller ones? dehydration metabolism anabolism (anabolic pathways) catabolism (catabolic pathways)
Term that describes the cellular process of breaking down large molecules into smaller ones is : Catabolic pathway.
What are catabolic pathways?Catabolic pathways involves breakdown of complex molecules into simpler ones and releases energy. Energy stored in the bonds of complex molecules like glucose and fats is also released in catabolic pathways.
Catabolism breaks down large molecules into smaller units. Catabolism is the breaking-down aspect of metabolism and whereas anabolism is the building-up aspect.
Some of the examples of the catabolic processes include glycolysis, citric acid cycle and breakdown of muscle protein in order to use amino acids as substrates for gluconeogenesis.
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Which process is a characteristic of all living things and is responsible for differences within a population?
Reproduction is the biological process characteristic of all living things and it is responsible for differences within a population (Option c).
What is reproduction?Reproduction is a biological process that an organism has in order to perpetuate its genes over generations, which may include different phenomena in order to increase the variation that acts as the primary source for natural selection.
Therefore, with this data, we can see that reproduction is the process that includes differences in order to enhance the adaptive abilities in the species by the mechanism of natural selection in nature.
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the process by which a nerve cell recaptures some of the neurotransmitters it has released is known as .
Important aspect of business is the process by which some small molecule transmitters are retrieved by the presynaptic terminal.
What are neurotransmitters and what do they do?Your body can't function without chemical messengers called neurotransmitters. These are charged with transmitting chemical "messages" through one neurons (nerve cell) to a succeeding target tissue. The following cell line may be a glandular, muscle, or another nerve cell.
What is controlled by neurotransmitters?Neurotransmitters, which are produced by nerve cells, also known as neurons, are crucial components of this system. Impulses are fired by nerve cells. By releasing neurotransmitters, also referred to as the body's chemical messengers, they achieve this. These substances send messages to other cells.
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Which of the following best demonstrates light being transmitted? A) a person seeing themselves in a mirror B) a fish appearing to be in a different location then they really are from the surface of the water C) black cement heating up on a hot day D) looking out a window on a summer day
Answer:
a) a person seeing themselfs in a mirror
Explanation:
Examine the diagram.
What genetic condition do the individuals in blue have?
Marine Science Explain the law of conservation of energy.
The law of conservation of energy states that energy can neither be created nor be destroyed in a chemical reaction or biological system. Although, it gets transformed from one form to another.
What is an example of the law of conservation of energy?An example of the law of conservation of energy is as follows:
When you roll a toy car from a flat staircase, it will fall into the ground where the kinetic energy gets transferred into potential energy.This may be clearly understood by the fact when taking all forms of energy are present in the environment, the total energy of this isolated environment always remains constant. This reveals the law of conservation of energy.
Therefore, the law of conservation of energy is well described above.
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two different bacterial species with doubling times of 2 h and 4 h are growing in a batch nutrient-rich medium with their maximum growth rate. the initial concentrations are the same. a. what would be the ratio of x1/x2 after 10 h of batch growth? b. how long should the batch growth of the mixed cultures last in order to obtain x1/x2
The ratio of x1/x2 after 10 h of batch growth would be 2:1. The batch growth of the mixed cultures should last for 20 h in order to obtain x1/x2.
We calculate this using,
a) Rate
N= N0ekt
For each bacteria we have to find out K so first bacteria with doubling time 2 hour
Assume there were 100 bacterias then after 2 hours there will be 200 bacterias
so N = 200 , N0=100 and t=2 hours
200 = 100*ek*2
200/100 = e^2K
e^2K = 2
Taking ln on both sides
2K = ln 2
K = ln2/2
=0.34657
The equation for bacteria X1
N0= Ne0.346t
For bacteria X2 K= ln2/4 ( because only difference here is the doubling time) =0.17328
So the equation for X2
N0= Ne0.173t
a) X1/X2 after 10 hours so t = 10
Ne0.346t / Ne
0.173t=e0.346t / e0.173t
= e0.346*10 / e0.173*10
= 31.817 / 5.64
=5.6413
b) X1 / X2= 10
e0.346t / e0.173t =10
Taking ln on both sides
ln ( e0.346t / e0.173t )= ln 10
ln e0.346t- ln e0.173t = ln 10
0.346t- 0.173t = 2.302
t ( 0.346- 0.173 ) = 2.302
t = 2.302/ ( 0.346 - 0.173)
=13.306
So the time is 13.306 hours
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To investigate how the vegetation in a coastal ecosystem changes with distance from
the high tide mark, the BEST sampling technique would be
(A) a line transect placed across the ecosystem
(B) regular observation of the ecosystem
(C) a quadrat placed randomly within the ecosystem
(D) a piece of string placed across the ecosystem
which gives results obtained
A line transect placed across the ecosystem is the best sampling technique.
What kind of vegetation is there along the coast?
Maritime forests, scrub thickets, grassy upland grasslands, freshwater swamps, freshwater marshes, mangrove swamps, saltwater marshes, and grassy or forested dunes are a few examples of common coastal vegetation environments.
What is line transect method?
As a guide for a sampling technique used to determine the distribution of organisms, a tape or string is laid along the ground in a straight line between two poles. Sampling is strictly limited to organisms that are in direct contact with the line.Another form of systematic sampling, similar to the belt transect, is the line transect. The line transect involves drawing a line through a habitat. It might be as easy as laying a string or rope across a habitat. In this strategy, the organisms that really touch the line are taken into account. As a result, only organisms that come into contact with the line can be sampled.Despite being similar to the belt transect, this approach only yields a little amount of data. It merely displays the changes occurring along the line. Species' existence and absence are noted. It displays a specific linear or gradient pattern along the line. With the aid of scale-drawn icons for various species, the data is presented as a diagram. The relative densities of different species cannot be determined via a line transect. The belt transect method is slower than this one, though.Hence line transect method is best used to investigate the vegetation of coastal system.
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Please help me please.
I have a F
Answer: The last one "Cells copy once and divide twice making two cells."
Explanation:
Answer: A process where a cell divides into two identical daughter cells. Cells copy one and divide one making 2 cells
Explanation:
The division of a cell occurs once in mitosis but twice in meiosis.
