Answer:
atrium,ventricle,lungs,pulmonary
Explanation:
Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.
When an enemy cell is present, a(n) __________ secretes perforins, which bore a hole in the enemy cell membrane.
a. interleukin
b. antibody
c. interferon
d. natural killer cell
e. opsonization
The correct answers is D. Natural killer cell
Explanation:
Natural killer cells are a type of cell in the immune system. These differ from other cells because these are innate, this means they attack all enemy cells or pathogens and are not specific. Also, they are the first general immune defense.
Moreover, the role of these cells to attack any enemy cell including cancer cells is possible due to specific chemicals or substances these cells release. One of these is perforins, which are mainly released by natural killer cells and destroy these by creating lesions in the cell membrane. According to this, the correct answer is D.
1. Which level of biological organization, from smallest to largest, is
correct? *
A. Organ System, Organ, Tissue, Cell
B. Cell, Organ, Tissue, Organ System
C. Cell, Tissue, Organ, Organ System
D. Tissue, Cell, Organ, Organ System
Answer:
Cell, Tissue , Organ, Organ System
Sweet yellow tomatoes with a pear shape bring a high price per basket to growers. Pear shape, yellow color, and terminal flower position are recessive traits produced by alleles, f, r, and t, respectively.
The dominant phenotypes for each trait – full shape, red color, and axial flower position – are the product of dominant alleles F, R, and T. A farmer has two pure-breeding tomato lines. One is full, yellow, terminal and the other is pear, red, axial. Design a breeding experiment (crosses) that will produce a line with tomato that is pure-breeding for pear shape, yellow color, and axial flower position.
Answer and Explanation: The farmer has a pure-breeding line of tomato means the farmer has a tomato with genotype FFrrtt while the other line of tomato has genotype ffRRTT.
The cross between these lines gives a F1 generation of heterozygous full, red and axial or FfRrTt.
With an individual of F1 crosses with another individual of F1, the Punnet Square will be:
FfRrTt x FfRrTt
1) Dividing each characteristics, for simplicity:
F f
F FF Ff
f Ff ff
R r
R RR Rr
r Rr rr
T t
T TT Tt
t Tt tt
Analysing Punnett squares, we notice the line wanted (ffrrTT) will be produced, when an individual of F1 generation cross with another individual with the same generation.
which substance compose the backbone of DNA
Answer:
phosphate and deoxyribose
Explanation:
Answer:
Phosphates and sugars
Explanation:
Which action is a result of gravity in relation to moving tectonic plates
Answer:
Ridge push and slab pull is a result.
Explanation:
Can I get brainiest!
Answer:
The answer is ridge push and slab pull
Explanation:
The photos below show specialized cells of a plant.
Which function are these cells specialized for performing?
Answer:
Photosynthesis
Explanation:
The green structures in the cell are chloroplasts. They are green because they contain the green pigment chlorophyll. Chlorophyll traps light energy and uses it to produce sugar molecules as food for the cell.
HELP PLEASEEE
Once a population reaches its carrying capacity, the growth rates
are able to return to what they were before resources were
limited.
SELECT AN ANSWER
True
False
Answer:
T :)
Explanation:
Which two characteristics do polar and dry climates have in common?
high altitude and very cold winters
very cold winters and contrasting seasons
contrasting seasons and very little precipitation
very little precipitation and few, specialized plants
Answer:
D. very little precipitation and few, specialized plants
Explanation:
its the answer on edge
The two characteristics which polar and dry climates have in common include very little precipitation and few specialized plants. Thus, the correct option is D.
What are Polar and Dry climates?A polar climate is a place where the climate generally has a temperature below the freezing, icy, and it is covered in snow. These areas do not get enough amount of direct heat and sunlight from the sun. Polar climates are located at the North Pole of the Arctic, and at the South Pole on the continent of Antarctica.
The dry climate are found in deserts which are very dry and the temperature of these areas are very high.
Both of these climates show some common characteristics such as very little precipitation and few specialized plants which can survive in these conditions.
Therefore, the correct option is D.
Learn more about Climate here:
https://brainly.com/question/10440860
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Activator or repressor proteins which bind DNA to regulate the transcription of genes do so mainly by: A. Covalent interactions between the protein and specific bases in the major groove of DNA B. Covalent interactions of Zn2 atoms with the phosphodiester backbone C. Non-covalent interactions between the protein and specific bases in the major groove of DNA D. Covalent interactions with nearby nucleosomes E. Answers B and D are correct
Answer:
C. Non-covalent interactions between the protein and specific bases in the major groove of DNA
Explanation:
Activator or repressor proteins are proteins with specific DNA-binding domains that have affinity by one or two DNA strands. In general, these proteins interact with the major groove of the B-DNA structure since this structure exposes more functional groups for binding. Non-covalent interactions are a type of interaction that does not involve the sharing of electrons. The interaction between proteins and DNA is due to the combination of different non-covalent interactions, which can be classified into four major types: van der Waals, hydrophobic, hydrogen and ionic interactions.
What type of scientist is most likely to study to cooling of lava after a volcanic eruption
Drag each tile to the correct location. Not all labels will be used. Identify the phases in the life cycle of small and big stars. supernova: In this stage, the star collapses and produces elements heavier than iron. planetary nebula: In this stage, the star emits strong energy pulses that push away the outer layers creating a cloud of ionized gas around the core. neutron star: In this stage, the star has reduced to an extremely dense core. white dwarf: In this stage, the star has reduced to a dense core.
Answer:
large= supergiant, supernova, then a neutron star
small= giant, planetary nebula, white dwarf
Explanation:
star life cycle changes by these phases
There are some specific ethical guidelines and standards for the forensic scientists to follow. But it was not always so. Investigate how the standards and ethics code came to be established over the years. Also, discuss whether they have helped as much as they should have.
Answer:
Explanation:
The field of forensic science is important to the criminal justice system. Forensic personnel must pay close attention to detail during the collection, preservation, and analysis of physical evidence. If evidence is mishandled, manipulated, or misinterpreted it can potentially destroy a case and/or the lives of all individuals involved
Answer:
Explanation:
In 1904, Scotland Yard officials introduced fingerprint matching to US law enforcement officials at the World’s Fair. The fact that forensic science was not born from the scientific community meant that forensic scientists were not always bound to the quest for knowledge, but instead for the purpose of solving crimes. This difference led to misaligned incentives. Expert witnesses were often paid per conviction in many states.
In the late 1980s, DNA evidence, which was born in the scientific community, has helped identify the guilty and exonerate the innocent. Many other forensic techniques, such as hair microscopy, ballistics analysis, and arson investigations, have not been subjected to the rigorous scientific evaluation that DNA analysis has. Other techniques, such as blood typing, have been properly validated.
These invalidated techniques have led to the Innocence Project, which holds that forensic science techniques should be shown to be valid and reliable through research and assessment of validity and reliability, and subject to accreditation and certification to assure quality. States are eligible to receive grant money if they do so. This change has resulted in the growth of many organizations, such as the ASCLD/LAB, that accredit forensic scientists.
Which of the following animals is successful because it moves quickly, reproduces rapidly, and has a waterproof external skeleton?
A. Ant
B. mouse
C. Bird
D. Squirrel
How does the formation of NAD+ differ between aerobic and anaerobic respiration?
A. NAD+ is formed in aerobic respiration by a fermentation process and formed in anaerobic respiration by oxidation of NADH.
B. NAD+ is formed by a fermentation process in anaerobic respiration by the conversion of pyruvate into lactate and by simple oxidation of NADH in aerobic respiration.
C. Under aerobic conditions, the electron acceptor is a molecule other than oxygen for NAD+ production, whereas under anaerobic conditions the electron acceptor is oxygen.
D. NAD+ is formed by the breakdown of pyruvate to form oxaloacetate in anaerobic respiration whereas in aerobic respiration it is formed by the breakdown of pyruvate into lactic acid or alcohol.
Answer:
B. NAD+ is formed by a fermentation process in anaerobic respiration by the conversion of pyruvate into lactate and by simple oxidation of NADH in aerobic respiration.
Explanation:
Nicotinamide adenine dinucleotide (NAD) is an important coenzyme that may exist in two different forms: oxidized (NAD+) and reduced (NADH). The fermentation is an anaerobic oxidation-reduction reaction where pyruvate and NADH are reactants, while lactate and NAD+ are products generated by the oxidation of NADH to NAD+ and pyruvate to lactate, respectively. On the other hand, during aerobic respiration, NADH generated by glycolysis is oxidized to form NAD+ by the donation of its electrons to reduce pyruvate to lactate. Subsequently, NAD+ is reused in glycolysis (again) in order to generate more molecules of ATP.
Which of the following statement is true:
Reptiles do not live very long.
Amphibians and reptiles are born similar in size.
Amphibian and reptiles are similar vertebrates.
Amphibians and reptiles eat identical organisms.
Answer:
C or D
Explanation:
Answer:
Amphibians and reptile are somewhat alike and they are not born the same size so I am leaning more towards c
Explanation:
What is the role of DNA polymerase in DNA replication?
A. It ties the chunks of DNA together.
B. It creates the replication fork.
C. It checks the DNA for errors.
D. It breaks apart the bases.
Answer: it checks the DNA for errors
Explanation:
Just took test
Answer:
A. ties chunks of dna together, took the test
Explanation:
the growth of plants due to gravity
Answer:
Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.
Explanation:
According to ______
electrons are added one sublevel at a time.
Answer:
Two electrons are added to one sublevel at a time (Hund's Principle)
Fill in the blanks with either P for prokaryote, E for eukaryote, or B for both. (2 points per correct answer) – 20 possible points
1. _____ I have a cell membrane.
2. _____ I have a nucleus.
3. _____ Bacteria are an example of me.
4. _____ Animals are an example of me.
5. _____ I contain ribosomes.
6. _____ I contain cytoplasm.
7. _____ I contain genetic material, such as DNA.
8. _____ I contain membrane-bound organelles.
9. _____ Plants are an example of me.
10. _____ Your body cells are made of me.
Please I need help!!
Answer:
1. B
2. E
3. P
4. E
5. B
6. B
7. B
8. E
9. E
10. E
Explanation:
1. Both prokaryotes and eukaryotes have a cell membrane. Hence, it is B
2. Only eukaryotes have a nucleus. Hence, it is E
3. Bacteria are an example of prokaryotes because they lack a membrane-bound nucleus. Hence, P
4. Animals are an example of eukaryotes because they possess a membrane-bound nucleus. Hence, E
5. Both prokaryotic and eukaryotic cells contain ribosomes. Hence, B.
6. Both prokaryotes and eukaryotes contain cytoplasm. Hence, B.
7. Both prokaryotes and eukaryotes contain genetic material, such as DNA. Hence, B
8. Only eukaryotes contain membrane-bound organelles e.g mitochondrion, endoplasmic reticulum. Hence, E.
9. Plants are an example of eukaryotes because they possess a membrane-bound nucleus. Hence, E.
10. My body cells as a human being are made of eukaryotic cells. Hence, E.
need help with this ??
Answer:
Year
I took a test with a similar question recently
Choose the following true statement:
a)When cells are finished with their tasks, they work, they die, and are replaced by new cells
b)Once a cell is made, the body will not regenerate new ones.
c)There are limited amount of cells the body can produce
d)All cells will continuously multiply forever.
Answer:
D
Explanation:
because. when one cell dies another is replaced so it gos on forever and ever
I need help please :(
Answer:
The answer willk be option C- Under the age of 20
If plant cells have both chloroplast and mitochondrial, What will likely happen to the glucose and oxygen once they are produced in photosynthesis?
to check temperature in large or thick foods, you should:
-an infrared thermometer
-a bimetallic stemmed thermometer
-a thermocouple thermometer
-a pop up thermometer
Answer: A bimetallic stemmed thermometer:
Explanation:
Describe the relationship between the weight added and the force of gravity.
Answer:
D
Explanation:
The heavier somthing is than the gravatational pull is more heavy
I need help with this please help me!!
Answer:
i need help with this too somebody help
Explanation:
what is the last step in scientific method
Answer:
Step 1- Question.
Step 2-Research.
Step 3-Hypothesis.
Step 4-Experiment.
Step 5-Observations.
Step 6-Results/Conclusion.
Step 7- Communicate. Present/share your results. Replicate.
Answer:
1. Ask a question
2. Hypothesis
3. Prediction
4. Experiment
5. Analyse Data
6. Conclustion
Explanation:
The last step in a scientific method is the Conclusion. Edgenuity 2020. Just took the assignment.
summer squash purchased at your local grocery store would be biologically classified as a
Answer:
considered a vegetable.
Explanation:
Part A
Scientific inquiry consists of a(n)
approach to resolving a question.
View Available Hint(s)
linear
fail-safe
implausible
stepwise
Answer:
The correct Hint is D) Stepwise
Explanation:
Scientific inquiry usually involves a process through which scientists try to resolve tough problems.
Many people have proposed various steps to the methodology of scientific inquiry. There is one that has 3 steps, one that has 5 steps, and another that has 7 steps.
The 7 steps of scientific inquiry are given below:
Defining the Question. Stating the Research. Postulating the Hypothesis. Carrying our the Experiment. Making Observations. Reaching Results/Conclusion.Communicate. Present/share your results. Replicate.Cheers
what do the nucleus cell, mitohondira cell, cell wall, chloroplast cell, cyptoplasm cell, and cell mabrane do?
Answer:
nucleus- this is where all genetic information is stored.
mitochondria- where respiration occurs
cell wall- gives the cell structure and prevents it from bursting
chloroplast- contain chlorophyll which stores energy from the sun for photosynthesis
cytoplasm- where chemical reactions occur
cell membrane- controls what comes in and out of the cell.
mitochondria: where respiration occurs
cell wall: gives the cell structure and prevents it from bursting
chloroplast: contain chlorophyll which stores energy from the sun for photosynthesis
cytoplasm: where chemical reactions occur
cell membrane: controls what comes in and out of the cell.
