Answer:
Billiard Ball Model
Explanation:
I used process of elimination.
The plum pudding model looks more like chocolate chip ice cream scoop.
As you can probably tell, that is not a solar system model.
It also is not a nuclear model because those look more like the attached file.
Action Potential: Relative refractory period
In a neuron, there is a period of time called the absolute refractory period where it is impossible for an action potential to
begin. This corresponds to the change in membrane potential from +30 to -70 mV, or the repolarization phase. Towards the
end of the repolarizing phase, there is a relative refractory period where it is difficult, but not impossible, for another action
potential to begin. Using the time slider function, which of the following segments in the neuron would correspond to a
relative refractory period?
A second action potential can be triggered during the relative refractory phase, but it will need a stronger stimulus to do so than the first time. Refractory times are brought on by the inactivation gate of the Na+ channel.
What Action Potential related to Relative refractory period?The axon has a tougher time producing successive action potentials during this time period, which is referred to as the refractory period, as a result of these transient alterations.
As a result, the refractory period restricts the quantity of action potentials that a certain nerve cell can generate in a given amount of action potentials time.
If enough powerful stimuli are applied to the neuron after the absolute refractory time, Na+ channels start to recover from inactivation and the neuron may respond once again by generating action potentials.
Therefore, A stimulus that is stronger than usual is required to generate neuronal activation during the relative refractory period.
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Which range best describes the possible number of cells in one organism
Answer:
ant to whale
Explanation:
Other than enzymes, what else can be used to separate the DNA strands?
Answer:
The enzyme responsible for separating the two strands of DNA in a helix so that they can be copied during DNA replication.Explanation:
Which of the following correctly describes a cell that is haploid. There is more then one correct answer.
A cell with a single set of chromosomes
Includes zygotes
In humans contains 46 chromosomes
In humans contains 23 chromosomes
All cells except gametes
Includes gametes
A cell with two sets of chromosomes
Explanation:
a cell with a single set of chromosomes
in humans contain 23 chromosomes
includes gametes
The process of fermentation takes place
Answer:
Fermentation is an anaerobic process in which energy can be released from glucose even though oxygen is not available.
Explanation:
Fermentation occurs in yeast cells, and a form of fermentation takes place in bacteria and in the muscle cells of animals.
Can small carbon compounds be formed into large carbon compounds?
Answer:
ya it can also be the largest compound but it needs alot if pressure
Which of the following is a difference between phase I and phase II of meiosis?
Phase I results in daughter cells with 23 chromosomes each and phase II with 46 chromosomes each.
Phase I results in two diploid daughter cells and phase II results in four haploid daughter cells.
Anaphase, metaphase, and telophase only occurs during phase I of meiosis.
Genetic variations can only occur during phase II of meiosis.
1.why is it important for gametes to be haploid?
They fuse to form a diploid organism so there is a correct number of chromosomes
2. The inheritance pattern of one gene will not affect the inheritance pattern of another gene. This is known as
independent assortment
3. which of the following is a difference between phase I and phase II of meiosis?
Phase I results in two diploid daughter cells ans phase II results in four diploid daughter cells
4. what is heredity?
The passing of genetic information from parents to their offspring
5. during meiosis sister chromatids may exchange sections of DNA leading to genetic diversity what is this process called?
crossing-over
TOOK TEST
The difference between phase I and phase II of meiosis is: Phase I results in two diploid daughter cells and phase II results in four haploid daughter cells.
MEIOSIS:
Meiosis is a kind of division that results in the formation of four haploid daughter cells that are genetically different from one another. Meiosis occurs in a two step division process namely: meiosis I and meiosis II. Meiosis I involves division of homologous chromosomes and produces two daughter cells that are diploid (2n) while meiosis II involves the division of the sister chromatids and produces haploid (n) chromosomes. Therefore, the difference between phase I and phase II of meiosis is: Phase I results in two diploid daughter cells and phase II results in four haploid daughter cells.Learn more at: https://brainly.com/question/12327654?referrer=searchResults
What is a density dependent limiting factor that affects population size?
-Drought
-Climate
-Natural Disasters
-Disease
Answer:
Disease
Explanation:
In Ecology, certain factors that affect the size of a population can either be dependent on size or not. Density-dependent factors are those factors that affect population of organisms in dependence of how dense the population is. Examples of these density dependent factors are diseases, predation etc.
For example, a certain disease will spread faster among a population of organisms whose size is dense but slower in a scarcely densed population. Hence, disease as a factor is dependent on population size. Note that; Drought, Climate, and Natural Disasters will wipe out a population irrespective of its size.
Answer:
Disease
Explanation:
29.
Use the diagram below to answer questions 29 and 30.
Use Note-taking 22-6 to help you identify the five major root structures on the drawing of a
dicot root.
А A.
B
B.
с
C.
D.
D
E.
E
Answer:
The diagram represents the process of enlarging a rectangle using a scale factor of 3. The width of the original rectangle must be:
9 in.
11 in.
12 in.
17 in.
Explanation:
Sickle cell anemia is an inherited form of anemia - a condition in which there aren't enough healthy red blood cells to carry adequate oxygen throughout your body.
Normally, your red blood cells are flexible and round, moving easily through your blood vessels. In sickle cell anemia, the red blood cells become rigid and sticky and are shaped like
sickles or crescent moons. These irregularly shaped cells can get stuck in small blood vessels. How does sickle cell anemia affect the blood flow in a human?
Answer:
RBCs are round red blood cells that easily move through blood vessels and carry oxygen with them to provide cells oxygen. In sickle cell anemia, the shape of the red blood cells is like sickles or crescent moons.
These cells occur due to mutation on the gene that produces this protein which results in rigid, sticky cells that can get stuck in small blood vessels and blocks the flow of blood, oxygen to parts of the body.
Hurry Timed!!! Help pls!!! 20 points!!!
Answer:
This fern has roughly 630 pairs of chromosomes or 1260 chromosomes per cell. The fact that these cells can accurately segregate these enormous numbers of chromosomes during mitosis is truly remarkable.
Explanation:
Leaf cell has 21 chromosomes.
Using the picture below, what is the BEST question that a student could ask that would help determine which aquatic biome this is depicting?
A.
Does the temperature of the water affect the salinity?
B.
Is there a variation in water pressure throughout the day?
C.
Is there a fluctuation in water salinity throughout the day?
D.
Is there variation in water temperature throughout the day?
Answer:
Explanation:
Using the picture below, what is the BEST question that a student could ask that would help determine which aquatic biome this is depicting?
A. x
Does the temperature of the water affect the salinity?
B. x
Is there a variation in water pressure throughout the day?
C. x
Is there a fluctuation in water salinity throughout the day?
D. right
Is there variation in water temperature throughout the day?
what is gene gun method and microinjection
Answer:
The gene gun method is a method used for genetically modifying plants. With the use of a gene gun, the gene gun method delivers extra DNA directly into a plant's nucleus. The method is also commonly called particle acceleration or microprojectile bombardment.
Hope it helps...
Have a great day : )
5. Most Sex-linked disorders like hemophilia and colorblindness are located on *
Answer:
Either the X or Y chromosome (the sex chromosomes)
Explanation:
Color blindness, hemophilia and muscular dystrophy are three x-linked phenotypes.
You are breeding alligators to be reintroduced in the wild. One of the female alligators is albino. Would it be possible to get normal colored alligators from this female? Identify the genotypes of each individual and show your work in
the Punnett squares below.
Answer:
It is possible for normal coloured alligators to be produced. If the albino trait is recessive and normal is dominant, the male would need 1-2 dominant alleles to produce a normal coloured alligator. It is also possible for a normal coloured alligator to be produced if albino is dominant and normal is recessive. In this circumstance, the female must be h e t e r ozygous, but the male can be either h o m ozygous or h e t e r o zygous to produce normal coloured offspring.
First punnet square genotypes:
Female - albino
Male - albino/normal (can be either one)
Second punnet square genotypes:
Female - Normal
Male - albino/normal (can be either one)
Which of the following is considered a disadvantage of using nonrenewable resources?
A)
they are expensive
B)
they are hard to access
C)
there is a very limited supply
D)
they can cause various environmental hazards
E)
they are not well adapted to modern technology
the answer is d
Explanation:
Answer:
d.) they can cause various enviormental hazards.
Explanation:
egd 2021
When certain molecules accept and then donate electrons, they also pick up H+ ions in the matrix, then release them into the inter membrane space.
As H+ diffuses back into the matrix through ATP synthase, its passage drives the phosphorylation of ADP to ATP. This process is called.............
A.Chemiosmosis
B.Electron Transport Chain
C. Synthesis of ATP
D.ADP phosphorylation
Fungi are all eukaryotes that are not animals, plants or protists.
TRUE
FALSE
Check it
Answer:
true
Explanation:
this is it I think.:)
11. The following graph shows the results of an experiment done by four different
groups. Each group took a rubber band and recorded how far it stretched as
they added weights to it. What is the independent (test) variable in this
experiment?
Group 1
Group 2
Group 3 Group 4
stretch
weight
I
A) The distance the rubber band stretched
B) The number of weights added to the rubber band
C) The different types of rubber bands
D) The same type of rubber bands
I am the Bio-molecule responsible for storing
unused energy and can be used by living
organisms as long term, slow energy.
Answer:
It's LIPID
Explanation:
storing unused energy. Long time storage of energy.
Why don’t eclipses occur during any other moon phases besides the new and full moon?
Explain why a person with brain damage may be able to see perfectly well, but not recognize faces.
What will happen to a tide pool itself if star fish are removed from the ecosystem?
Answer:
the ecosystem will be disturbed... the animals feeding on it will be reduced due to lack of food and the animals on which the star fish was feeding will be increased which causes a total imbalance in ecosystem..
5. Design an experiment that would help you collect the data you have identified in question four. Identify your independent variable(s), dependent variable(s), treatments, and control. (5 points possible)
Answer:
independent variable - x , dependent variable - y
Explanation:
the indepent variable is something that is stable , it does not change & the dependent variable is that variable that depends on the independent variable
Design an experiment that would help you collect the data you have identified in question four independent variable - x , dependent variable - y.
What is independent variable?The indepent variable is something that is stable , it does not change & the dependent variable is that variable that depends on the independent variable.
The experimenter's chosen variable or variables are considered independent. The anticipated "cause" will be this manipulation. The independent variable's value determines how much the dependent variable is worth.
The result of the cause will be this (if the manipulation succeeds). One group of volunteers receives a medication, while the other receives a placebo. Cancers diminish in the medication group but they do not in the control (placebo) group.
Therefore, Design an experiment that would help you collect the data you have identified in question four independent variable - x , dependent variable - y.
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Which of the following strands are complementary DNA sequences?
Choose 1 answer:
It's B!!!!!!!!!!!!!!!
An individual with two different alleles for the same gene is
called
Answer:
an individual with two same alleles genes is called a heterozygous
the correct sequence of events in meiosis
Help melee please...
Answer:
25%
Explanation:
The image is the punnet square. :)
How is viral reproduction different from the reproduction of single-celled and multicellular
organisms?
A. The virus depends entirely on a host cell to reproduce.
B. The virus relies on nucleic acids, such as DNA, to reproduce.
C. The virus relies on proteins to reproduce.
D. The virus reproduces very rapidly, but in smaller numbers.
Answer:
A. The virus depends entirely on a host cell to reproduce
Viral reproduction different from the reproduction of single-celled and multicellular organisms because the virus depends entirely on a host cell to reproduce. Thus, option A is correct.
What are the difference between single- celled and multicellular organism?The main difference between single- celled and multicellular organism is that single- cellled organisms are made up only single cell on the other hand multicellular organisms are made up of multiple cells.
Cell theory is a scientific theory that's help to learn how living organisms are made up of cells, that's they are the basic structure unit of all organisms, and that all cells from pre-existing cells.
Prokaryotic Cell
Prokaryotic cells are single-celled microorganisms known to be earliest on earth.
Eukaryotic cell
Eukaryotic cells have a nucleus enclosed within the nuclear membrane and form large and complex organism.
Difference between unicellular and multicellular.
The main difference between unicellular organisms and multicellular organisms is that unicellular organism is unspecialized it means all the body function depends upon only on the single cell and in multicellular organism there is specific cells for specific purposes.
Multicellular and unicellular organisms are perform almost all the life running activities and processes such as respiration, reproduction digestion, breathing, and metabolism.
In unicellular organism division of labour is at the organ level on the other hand in multicellular the division of labour at cellular, tissue, organs and organ system level.
Unicellular organism has simple body organization and multicellular organism have complex body organism.
Therefore,viral reproduction different from the reproduction of single-celled and multicellular organisms because the virus depends entirely on a host cell to reproduce. Thus, option A is correct.
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The region of the stem nearest the seed.
Answer:
B. Hypocotyl
Explanation: