Answer:
The right atrioventricular valve (tricuspid) regulates the opening between the right atrium and the right ventricle.
Explanation:
Valves are gates that allow the connection between atria and ventricles. The two valves located on the right side (tricuspid and pulmonary) direct the incoming blood from the body to the lung, where it is oxygenated; from there it returns to the left atrium, to later pass through the mitral and aortic valves. The left atrium connects to the left ventricle through the mitral valve and the right atrium connects to the right ventricle through the tricuspid valve.
what two types of environments can food chains be made from
Select the mechanisms used by tumor suppressor proteins to prevent the initiation and progression of cancer.
A. They initiate DNA repair processes to resolve DNA damage.
B. They promote uncontrolled cell division.
C. They induce apoptosis in response to DNA damage.
D. They act at cell cycle checkpoints to regulate progression through the cycle.
E. They enhance cell growth by causing certain signaling pathways to remain constitutive active.
Answer:
A, C and D
Explanation:
Tumor suppressor genes encode proteins that act to inhibit cell proliferation and thus repress the development of tumors, while oncogenes are genes whose overexpression induce carcinogenesis. Tumor suppressor proteins inhibit tumor growth by repairing errors during DNA replication, by suppressing cell cycle progression and by inducing apoptosis (cell death). A well-know tumor suppressor is the protein p53, which is a transcription factor that triggers antiproliferative cell programs by inducing or inhibiting critical effector genes.
Select all of the following that are characteristics of heat.
The bar chart below shows data for a system with two types of particles, x and y, in two connected regions, A and B. All of the x particles started in region A, and all of the y particles started in region B. Which line graph best depicts the data in the bar chart?
Answer:
C.
Step-by-step explanation:
We have two types of particles, x and y and two regions, A and B. The enunciated says that at the beginning all x particles are in A and all y particles are in B. Then, at the beginning, the 100% of x particles are in A and 0% of y particles are in A. So, the option A is discarded.
Now, the right part of the picture shows that after a while, 12 x particles go from region A to region B and 12 y particles go from region B to region A. Then, the percentage of x particles en region A will decrease and the percentage of y particles in region A will increase. That situation leaves us only with options B and C.
Finally, there will be 38-12 = 26 x particles in region A after the time and 12 y particles in region A. 26 and 12 represent two different percentages of 38 (the total) so, the graphs don't join. So, the answer is C.
Answer:
c
Explanation:
Other guy said so
When water molecules form into ice, ____. a. hydrogen bonds between water molecules readily break b. the water molecules pack less densely c. evaporation of water molecules happens more readily d. their structure becomes less rigid e. the water molecules jiggle more
Answer:
B
Explanation:
Since ice is less dense than water, it would make sense for the molecules to pack less densely.
When water molecules form into ice, the water molecules pack less densely.
The correct answer is B.
What are water molecules called?
The medical name for water is H2O. it's miles called H2O because it has atoms of hydrogen (H) and one atom of oxygen (O). There are thousands and thousands of these molecules in one drop of water. The shape water takes relies upon at the motion of the water molecules.
What is an instance of water molecule?Water is some other example of a molecule. Water is fabricated from 3 atoms, an oxygen atom and two hydrogen atoms, and accordingly is each a molecule and a compound. A chemical formula is an abbreviation that indicates which atoms are inside the molecule and in what quantity. for example, the chemical formula for water is H2O.
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Which of the following is not one of the most common elements in living things? a. iron b. hydrogen c. nitrogen d. oxygen e. carbon
Iron micronutrient IS NOT one of the most common elements in living things (Option a).
Micronutrients can be defined as nutrients that are required by living things in very small amounts.Micronutrients include vitamins and minerals. Iron (Fe) is a micronutrient (i.e., a mineral) that is needed in small amounts. In adult humans, the average daily recommended intake of iron is 8 to 18 milligrams (mg).Hydrogen (H), nitrogen (N), oxygen (O), and carbon (C) are all major constituents of macronutrients such as carbohydrates, lipids, proteins and nucleic acids.In conclusion, iron micronutrient IS NOT one of the most common elements in living things (Option a).
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Which of the following regions of the body are the tibia and fibula?a. Coxal Regionb. Antecubital Regionc. Tarsal Regiond. Crural Region
Answer:
The correct answer is : crural region.
Explanation:
In human body, The crural region of the bone is the leg region which is extending to knee to ankles in simpler language. It includes the tarsal region, tibia, fibula, shin area of leg, pedal region.
The coxal area or region is the region of hip bone and pelvic bone. Antecubital region in elbow pit of the arm and tarsal region is part of the toe region.
Thus, the correct answer is : crural region.
The tibia and the fibula can be found in the crural region of the body.
The crural region of the body covers the shin areas of the leg. That is the area between the knee and ankle.
The area covers a series of bones which include the tibia and the fibula. Other bones found in the area include the patella, tarsal bones, metatarsals, and phalanges.
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similar to protists, archaea can reproduce to generate two genetically identical daughter cells through
Similar to Protists, Archaea can reproduce to generate two genetically identical daughter cells through Binary fission.
What is Binary fission?Binary fission may be defined as a type of asexual reproduction in which an organism significantly duplicates its genetic content. According to this, the deoxyribonucleic acid (DNA), and then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.
According to the context of this question, binary fission is a mechanism of reproduction in simpler organisms through which a parent cell divides into two genetically identical daughter cells.
Archaea can also reproduce asexually through budding and fragmentation, where pieces of the cell break off and form a new cell, also producing genetically identical organisms.
Therefore, similar to Protists, Archaea can reproduce to generate two genetically identical daughter cells through Binary fission.
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Butter is an example of
A saturated fat
A polar molecule
An unsaturated fat
A carbohydrates
Answer:
The answer is A- A saturated fat
If your total blood volume is 5 L the volume in your veins and venules is:______a. 3Lb. 3Lc. 1Ld. 5L
Answer:
A and B
Explanation:
That's about 3L because at any given time the viens hold about 70% of blood because they have thinner and less rigid walls so 0.7*5 is about 3L
Which of the following properties of water explains its solvent abilities for certain substances?
a) High surface tension
b) Kinetic energy of liquid water molecules
c) Polarity of water molecules
d) High specific heat
Answer:
the answer is c, polarity of water molecules
Explanation:
Water is the universal solvent, which has high solubility. The water is tasteless, odorless, and transparent fluid.
The correct answer is:
Option C. Polarity of water molecules
Water has solvent abilities for a certain substance because::
The water molecule is made up of two atoms of hydrogen and one atom of oxygen. The composition of water molecules provides its polarity and the ability to form hydrogen bonds.The polarity of the water makes it an excellent solvent and can dissolve many polar and other substances.
Thus, the correct answer is Option C.
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Sarah wanted to find out if heat had an effect on the growth of mold. She grew mold in nine jars. Each jar had the same amount and type of food. Three jars were kept at 0ºC. Three were kept at 90ºC. Three were kept at 27ºC. After four days she recorded the growth of the mold
Answer:
This question is incomplete; but from the understanding of the question, it is about identifying the variables in the experiment e.g independent variable, dependent variable, control variable, control group etc.
The variables are as follows:
Independent variable: HEAT at different temperatures
Dependent variable: GROWTH OF MOLD
Constants/Control variables: Same amount of food, Same type of food
Control group: Jars kept at 0°C
Explanation:
A variable in an experiment are those factors that are subject to change. The INDEPENDENT VARIABLE in an experiment is that variable that is manipulated or controlled in order to bring about an outcome. In this Sarah's experiment, the independent variable is the HEAT CHANGE.
The DEPENDENT variable is the variable that responds to the changes made to the independent variable. The response of the dependent variable is dependent on the independent variable. In this experiment, the dependent variable is the GROWTH OF THE MOLDS because it responds to changes in heat (independent variable).
The CONSTANT or CONTROL variables in an experiment refers to the variables that are kept constant or unchanged throughout the experiment. Although they are not part of the experiment but they can affect the outcome of the experiment if changed. The constants in this experiment are the SAME AMOUNT and SAME TYPE OF FOOD given to each jar.
A CONTROL group is the group that does not receive any experimental treatment I.e. In this experiment, the jars placed at 0°C did not receive any heat, hence, they are the control group.
The experimental groups were the jars kept at 90°C and 27°C respectively.
Can someone please answer this ASAP? How has genetic study impacted society?
Answer:
Genetic study has changed our understanding of medicine and biology. In addition it has given scientists and technologists the capability to:
Cure diseasesControl reproductionShape crop and other organismsAnd possibly adjust humans from the inside out*Credit goes to uncw.edu*
What type of macromolecule would amylase be an example of? Nucleic Acid Carbohydrate Lipid Protein
Answer:
Enzymes (protein)
Explanation:
What kind of organic macromolecule is amylase? Amylase is a typical enzyme and like the vast majority of enzymes it is a protein.
In humans there is a dominant allele (A) for the absence of moles; while the recessive allele (a) results in the presence of moles. A couple who are both heterozygous for this locus (Aa) plan to have seven children.
a. Expand the binomial (p + q)7.
b. What is the probability that:
(i) The first child that is born will not have moles.
(ii) All of the children will have moles.
(iii) The first two children will have no moles and the last five will have moles.
(iv) Of the 7 children, 4 will have no moles and 3 will have moles
c. Assume this couple now have two children, one with moles and one without moles. What is the probability that the child born without moles is a carrier of the a-allele (ie heterozygous)?
Answer:
a. [tex](p + q)^7[/tex] = [tex]p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7[/tex]
b. i. 0.75
ii. 0.000061
iii. 0.012
iv. 0.17
c. 0.67
Explanation:
a. The expansion of the binomial (p + q)7 would be such that:
[tex](p + q)^7[/tex] = [tex]p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7[/tex]
b. Both couples are heterozygous:
Aa x Aa
AA Aa Aa aa
Since A is dominant over a,
probability of having mole (aa) = 1/4
probability of not having moles = 3/4
Therefore, the probability of the first child not having moles = 3/4 or 0.75
ii. Let the probability of not having mole = p and the probability of having mole = q. From the binomial expansion:
[tex](p + q)^7[/tex] = [tex]p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7[/tex]
Probability that all of the children will have moles = [tex]p^0q^7[/tex]
since p = 3/4 and q = 1/4
[tex]p^0q^7[/tex] = [tex](3/4)^0(1/4)^7[/tex] = 0.000061
iii. Probability that the first two children will have no moles and the last five will have moles = [tex]21p^2q5[/tex]
= [tex]21(3/4)^2(1/4)^5[/tex]
= 0.012
iv. Probability that 4 will have no moles and 3 will have moles out of the 7 children = [tex]35p^4q^3[/tex]
= [tex]35(3/4)^4(1/4)^3[/tex]
= 0.17
c. Probability that the child born without moles is a carrier of the a-allele = probability of heterozygous.
From the cross in (b), the genotypes of those born without moles are AA and 2Aa. Therefore, the probability of not having moles and be Aa is:
= 2/3 or 0.67
A student conducted a well designed scientific experiment. Which of the following needs to happen in order for the results of the experiment to be widely accepted?
Answer:
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions.
what part in the us would a hurricane most likely strike
Answer:
Louisianna
Explanation:
Answer:
louisiana
Explanation:
Select the term that describes the constant mutation of the influenza virus glycoproteins over time:_________.
a) Antigenic drit
b) Antigenic shift
c) Antigenic shock
d) Albetic shin
e) Allelic shift
Based on the Data shown in the in the Table, what question was most likely being tested? 1. which weeds grow faster in rainy seasons 2. how does the levels of rainfall affect the growth of sweet pea and chicory 3. how did the rainfall and growth of weeds change between the years of 1980 and 1984
Based on the data shown in the image, the most likely hypothesis being tested would be how the level of rainfall affects the growth of sweet pea and chicory.
Data analysisThe first column in the table indicates the years of study which range from 1980 to 1984.
The second column indicates the amount of rainfall fro each year. The third and fourth columns represent the yield per meter square of sweet pea and chicory.
Sweet pea and chicory are crops that serve different uses to man, unlike weeds. Thus, what is being tested has nothing to do with weeds.
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any ideas on what the answer is?
the answer to this question is starch
In a muscle twitch, which best describes what is happening during the latent period?
Answer:
During latent period, the muscle is preparing itself for contraction which comprises of biochemical activities from the stage acetylcholine bind to sarcolemma through cross-bridge formation.
Explanation:
A single muscle twitch has three stages which are latent period, contraction phase and relaxation stage
During latent period, the muscle is preparing itself for contraction which comprises of biochemical activities from the stage acetylcholine bind to sarcolemma through cross-bridge formation because the latent period is a short delay from the time the action potential get to the muscles until tension can be seen clearly in the muscle and the action potential is being propagated along the sarcolemma.
What is the probability that the first offspring from the cross listed below will be heterozygous for all loci?
aa Bb dd Ee x AA bb Dd Ee
Answer and Explanation:
Cross: aa Bb dd Ee x AA bb Dd Ee
We can calculate the probability of getting heterozygous individuals in the progeny by using the product rule. Assuming that these four genes assort independently (events that occur independently from each other), we can infer that the F1 will have the next genotypic proportions for each gene:
1) aa x AA
F1) 4/4=1 Aa
2) Bb x bb
F1) ½ bb
½ Bb
3) dd x Dd
F1) ½ dd
½ Dd
4) Ee x Ee
F1) ¼ EE
2/4 = ½ Ee
¼ ee
So, to know what the probability is that the F1 of being heterozygous for all loci, we must multiply the respective individual probabilities of getting a heterozygous genotype, like this:
1 Aa x ½ Bb x ½ Dd x ½ Ee = 1/8 AaBbDdEe
Researchers have suggested that people can be divided into chronotypes. A chronotype identifies an individual as a(n)
Answer: morning type or an evening type
Explanation: According to research, a chronotype identifies an individual as a morning type or an evening type. By definition, a chronotype is the natural disposition of an individual to be more alert or lethargic at different times of the day (especially in the morning or in the evening), depending on a variety of factors associated with circadian rhythms (the 'internal body' clock that regulates the 24-hour cycle of biological processes in both animals and plants).
Which is an interconnection of food chains in an ecosystem?
food web
trophic chain
energy web
producer web
Answer:
ITS A
Explanation:
Food web is an interconnection of food chains in an ecosystem. Therefore, the correct statement is option A.
What is food web?A food web is an ecosystem's intricate network of connected food systems. It shows how nutrients and energy move between organisms in an ecosystem.
Producers, consumers, and decomposers make create food webs, which illustrate how these creatures are related to one another by their interactions with one another's prey.
The arrows in a food web represent the flow of nutrients and energy from one organism to another. Typically, the energy flow begins with the sun or another primary energy source, passes through producers like plants, and then continues to consumers like herbivores and carnivores. A food web consists of many interconnected food chains and shows the flow of energy in an ecosystem.
Therefore, food web is an interconnection of food chains in an ecosystem which is constituted by producers, consumers, and decomposers.
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If a splice site were mutated so that splicing could not take place, what would the effect be on the mRNA?
Answer:
The mRNA will contain intron sequences and eventually be translated into a non-functional protein.
Explanation:
Splicing is the last stage involved in mRNA processing (the first two being 5' capping and polyadenylation). A mRNA transcript (result of transcription) contains both protein-coding regions (exons) and non-coding regions (introns). Splicing involves the removal of the introns from the mRNA sequence (by spliceosomes) and the rejoining of the exons.
If the site where splicing process should occur were mutated and splicing does not take place, this means that the introns will not be removed from the mRNA sequence, hence, the final transcript will contain both protein coding and non-coding regions.
If translation (synthesis of protein) eventually occurs, the mRNA that didn't undergo splicing will be translated into a protein molecule that is not functional. This is because the non-coding sequences will interfere with the reading frame of the coding sequences.
Joe has been diagnosed with major depressive disorder. He interprets negative stressful events using a pessimistic explanatory style. This explanatory style creates a hopeless, depressed state, which then hampers the way he thinks and acts, causing more negative stressful events. Joe's depression is thus, at least in part, due to:
state-dependent memory.
rumination.
a biochemical imbalance.
indicators of depression.
Answer:
The correct answer is : state - dependent memory.
Explanation:
State dependent memories are recollections of memories that are set off or enhanced or increased by an individual's present mind-set in view of the relationship to memories framed when you were in a comparative state.
For example, pleasant memories are all the more effectively or strongly recalled when one is feeling happy and the equivalent goes for negative thoughts and sadness or outrage towards something. In this case Joe having more negative thoughts in response of depression or negative thoughts.
Thus, the correct answer is : state - dependent memory.
Joe's depression caused by pessimistic explanatory style of negative events is due to State dependent memory,
State dependent memory:
It is phenomenon in which people recall more information if their mental or physical state is same as the time event.
Here, pessimistic explanatory style makes Joe to recall depressive events that cause more depressive events to come.
Therefore, Joe's depression caused by pessimistic explanatory style of negative events is due to State dependent memory,
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Plate tectonics is the theory that the Earth’s crust is made up of plates that glide over a layer of mantle. A prediction of this theory is that the plates will move relative to each other as they move over the mantle. To test this hypothesis, a scientist places a marker on two adjacent plates to measure their movement over a decade. What would be the expected result of the experiment? How would you interpret the results if the scientist sees no movement?
Answer: So the result of this experiment would be that the makers are either further away from each other or closer to each other, confirming that the tectonic plates which are moving and are not static. North America plate, and on the South American plate, they move at pretty much the same speed, and also in the same direction, so with setting up makers we can not get to valid result. This is why they don't see no moment.
Answer: The result for this given experiment is that makers are further away from each other or closer to each other. North america plate and the south plate can move at the same speed, the same direction, by the same time. This is why they don't see no movement.
Ravi is unable to choose the right career path after completing his college education. He plans to visit a psychologist who might help him find
the right career. In this scenario, Ravi is most likely to visit a human factors psychologist.
a. True
b. False
Answer:
The correct answer is : false.
Explanation:
The branch of the psychology that deals with human behavior regarding work and work related problems is known as career counseling or vocational psychology, and counselors or specialized in this psychology known as vocational psychologist.
Ravi should visit to the vocational psychologist instead of human factor psychologists. Human factor psychologists deal with daily life factors that affect human behavior such as transportation, work, energy system and many more.
Thus, the correct answer is : false.
The first heart sound is described as lub and corresponds to which event of the cardiac cycle?
Answer:
The first heart sound correspond to the closure of atrioventricular valves which comprises of mitral and transcupid valves.
Explanation:
The first heart sounds is describe as lub and its correspond to the closure of atrioventricular valves which comprises of mitral and triscupid valves because it's coincides with ventricular contractions as the ventricular pressures surpasses the pressure of the atrial which mark the begining of ventricular systole and the end of mechanical diastole. It is a single sound because the mitral and triscupid valves closes simultaneously.
what is the full form of RBC