Answer:
Structure of amoeba primarily encompasses 3 parts – the cytoplasm, plasma membrane and the nucleus. The cytoplasm can be differentiated into 2 layers – the outer ectoplasm and the inner endoplasm. The plasma membrane is a very thin, double-layered membrane composed of protein and lipid molecules.
Explanation:
14). Clonal selection and differentiation of B cells activated by antigen exposure leads to the production of ________. A) large quantities of the antigen initially recognized B) vast numbers of B cells with random antigen-recognition receptors C) long-lived erythrocytes that can later secrete antibodies for the antigen D) short-lived plasma cells that secrete antibodies for the antigen
Answer:
The correct answer is D) short-lived plasma cells that secrete antibodies for the antigen
Explanation:
Each B lymphocyte has an antigen receptor (BCR: B cell receptor), a surface immunoglobulin (IgM or IgD), that binds to specific domains of the antigen called antigenic determinants or epitopes. Only B lymphocytes with a high antibody affinity for the antigen, and which are capable of processing and presenting it, will be positively selected. In this contact between the two cells, an exchange of chemical signals takes place that leads to the activation, clonal proliferation and differentiation of B cells into two sister subclones: one of antibody-secreting plasma cells, and the other of memory primed B cells. Therefore, only these last positively selected B lymphocytes will survive, proliferate and differentiate into plasma cells, synthesizing and secreting antibodies of a single isotypic class, with a unique specificity and high affinity, improving the ability to adhere to the antigen and, thus , neutralize and destroy pathogens.
Why are dogs color blind？
Answer:
It is caused by abnormalities in color-detecting molecules, known as cones, in the retina.
I hope this will help you
Which statement best describes the relationship between a dependent variable and an independent variable in a scientific
Investigation
Answer:
A dependent variable is a variable affected by the change. The independent variable is the variable that is changed.
Explanation:
plants make glucose using energy from the sun and two molecules. which two molecules do they use ?
What does it mean for a human to express their genes?
Answer:
Gene expression is the process by which the instructions in our DNA are converted into a functional product, such as a protein. ... Gene expression is a tightly regulated process that allows a cell to respond to its changing environment.
Suppose D were dominant and d were recessive, and you could label the D allele in the P generation with a radioactive substance that could be inherited over several generations. You create hybrids by mating your radioactive DD individuals to dd individuals. Finally, you cross two F1 individuals (with the Dd genotype). In 1,000 offspring, how many would you predict would be radioactive?
Answer:
750 offspring
Explanation:
The correct answer would be 750 offspring.
The D allele has been labeled with radioactive substance.
If you cross Dd and Dd:
Dd x Dd
DD Dd Dd dd
3/4 of the resulting offspring would have, at least, the D allele.
Hence, out of 1000 offspring,
3/4 x 1000 = 750
750 would possess the radioactive label.
Nitrogen is the most common element in the air. Why do bacteria play a role in the nitrogen cycle?
Explanation:
Bacteria play a role in the nitrogen cycle because:The bacteria’s helps in breaking down the organic materials which has nitrogen in it, and helps in giving the nitrogen back to the cycle. Bacteria helps in breaking down of the leaves and then it diffuses the nitrogen to the soil. Prokaryotes also plays an important role in the nitrogen cycle. The nitrogen fixing bacteria present in the root zone of plants basically in the soil, helps in conversion of the nitrogen into ammonia. Then the nitrifying bacteria converts the ammonia to the nitrites or can say nitrates.
Answer:
sorry I didn't know hahaha
what are the cells that pass from parents to their children
Answer:
Genes are the blueprint for our bodies. If a gene contains a change, it disrupts the gene message. Changes in genes can cause a wide range of conditions. Sometimes a changed gene is inherited, which means it is passed on from parent to child. Changes in genes can also occur spontaneously.
In terms of base nucleotides, explain the only difference between the DNA message for normal hemoglobin and the DNA message for sickle-cell hemoglobin.
Answer:
In the 1950s, Vernon Ingram demonstrated that the only structural difference between normal adult hemoglobin and sickle-cell hemoglobin is the replacement of glutamic acid with valine in the β-globin amino acid chain (Ingram, 1957; 1959).
its may help you ☺
llxXKHaNZaDaXxllExplain the adaptations for root hair cell
Answer:
they have thin membranes to allow diffusion of substance for short distance
they are numerous to increase the surface area of absorption
hope this helps
An amino acid analyzer is an instrument used to determine a. the sequence of amino acids in a polypeptide chain b. the presence of modified amino acids in a protein c. the identity of N-terminal and C-terminal amino acids in a protein d. the identities and relative amounts of amino acids in a protein
Answer:
d. the identities and relative amounts of amino acids in a protein
Explanation:
An amino acid analyzer is an automated machine that is used to determine the identities and quantities of amino acids in a given protein, peptide, and cellular samples. It makes use of the ion-exchange chromatography principle to determine the presence of amino acids. When the chromatogram is obtained, the relative amounts are then determined by the analyzer.
Since proteins are made of sequences of amino acids, the identities of proteins can also be obtained through this method. Ninhydrin, in the chromatographic column, reacts with the present amino acids under an ultra violet detector and is then observed at a wavelength of about 440 - 570nm.
Which type of neurons are responsible for carrying signals from the sensory neurons to the motor neurons?
A. Relay neurons
B. Sensory neurons
C. Transmission neurons
D. Motor neurons
Answer:
A. Relay neurons
Explanation:
Neurons or nerve cells are one of the cell types contained in the nervous system. Neurons transmit or carry nerve signals. There are three major types of neurons namely; motor neurons, sensory neurons, and interneurons.
Specifically, interneurons or relay neurons are types of neurons that connects the sensory and motor neurons i.e carrying signals from the sensory neurons to the motor neurons?
In what ways is a eukaryotic cell similar to a city?
Answer: In many ways, the eukaryotic cell is kind of like a city. I will tell you what each of the organelles in a cell does. Your job will be to try to match each of the cell parts to the parts of a city and explain why they are similar. a) Golgi Apparatus: packages up proteins and labels them for distribution to other parts of the cell.
Each one, like the organs inside your body, fulfills a particular function that is required for the cell to stay alive. Consider the cells to be a miniature city. Because they all do similar jobs, the organelles could represent companies, places, or parts of the city.
What is a cell?Cells are the fundamental building blocks of all life. Gazillions of cells make up the human body.
They support the body's structure, absorb nutrients from food, convert those nutrients into energy, and perform specialized functions.
Each one, like the organs in your body, performs a specific function that is required for the cell to survive. Think of the cells as a miniature city.
Because cell city has jobs that a plant cell does not, it represents an animal cell. In cell city, we believe that a waste disposal plant performs the same function as lysosomes, an organelle found only in animal cells.
Thus, this way, a eukaryotic cell similar to a city.
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Write two functions of neurons.
Answer:
hope it helps you
Explanation:
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[tex]\boxed{ \sf{Answer}} [/tex]
↦Any 2 functions of the neuron can be :-
They conduct electrical impulses thus helping to transmit messages to the brain, glands, muscles or other nerve cells.They are responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐
Which relates the wavelength and frequency of a wave?
The frequency is the number of wavelengths that pass a fixed point in a second.
A wavelength is the distance on a wave between one frequency and the next.
The time it takes for one wavelength to pass a fixed point is the frequency.
The speed at which a wavelength travels is the frequency of the wave.
Answer:
The correct answer is - The frequency is the number of wavelengths that pass a fixed point in a second.
Explanation:
The wavelength of a wave is the distance between one point on a wave and the nearest point or one crest to another crest of a wave. The frequency of the wave is the number of wavelengths that pass a fixed point in a second. A period is the amount of time one wavelength requires to pass a point.
Frequency = 1/wavelength, which means if one increases other decreases.
Thus, the correct answer is - The frequency is the number of wavelengths that pass a fixed point in a second.
Answer: A
Explanation:
what happens to the space inside the bell jar when the stretchy rubber is pulled down?
Answer:
The cavity inside the bell jar is airtight. As the diaphragm is pulled down, the volume of the cavity increases
Answer:
The cavity inside the bell jar is airtight. As the diaphragm is pulled down, the volume of the cavity increases.
This causes an increase in pressure within the bell jar, the air rushes out of the balloons causing them to deflate.
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If Darwin knew of Mendel's work, how might it have influenced his theory of evolution? Do you think this would have affected how well Darwin's work was accepted?
Answer:
See explanation
Explanation:
According to Darwin, the determinant of the ability of species to thrive in their environment is their ability to develop favourable characteristics which enable them to survive in their environment. This ability to develop favourable characteristics is called natural selection.
These favourable characteristics are passed on from parents to offsprings and are responsible for the perpetuation of organisms having these favourable characteristics in comparison to other members of the same species.
In relation to Mendel's theory, these favourable characteristics could be regarded as Mendel's factors (currently identified as genes). These factors are units of inheritance passed on from parents to offsprings.
If Darwin had an idea of Mendel's work when he propounded his evolution theory, he could have modified his idea of favourable characteristics to imply genes. This would have made his idea more empirical than speculative and led to a faster world wide acceptance of his ideas.
Which compound is known as end product of purine nucleotide metabolism? * Uric acid Carbonic acid Uronic acid Citric acid
What is an enzyme?
A. Along chain of amino acids
B. A protein that speeds up chemical reactions in a living thing
C. A molecule that carries genetic information
D. The specific molecule that binds to a catalyst
Answer:
my answer is B
hope this helps
Cell specialization is important during the growth and development of
a multicellular organism. This process is most directly regulated by
Answer:
Protein
Explanation:
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms.
Cell specialization is also referred to as cell differentiation and it can be defined as a biological process through which generic cells transform into specific cell types, so as to enable them perform certain functions within the body of a living organism.
Simply stated, it's the special function or job in the body of a living organism that are associated with cells.
Generally, cell specialization plays a significant role in the development of embryos.
Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Cell specialization is fundamental and key for the growth and development of a multicellular organism.
Furthermore, cell specialization as a process is most directly regulated by protein; one super regulating protein encourages cell differentiation while the other tries to stop or prevent the process. These proteins are referred to as master regulating proteins or Helix-Loop-Helix proteins.
What does a vaccine contain?
1.T cells
2.infectious particles
3.antigens
4.antibodies
Answer:
Antigens
Explanation:
Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body
easy biology question below first correct answer gets brainliest
Sort phrases related to warm fronts and cold fronts into the correct categories.
Warm Fronts.
Cold Fronts.
bring gentle, long-lasting rains
slide over the top of existing air mass
shown as red half circles on map
bring heavy storms
force existing air up into atmosphere
shown as blue triangles on map
Answer:
warm: gentle long lasting rain , half red circles, slides over the top of air masses
cool: blue triangles, force existing air into atmo., heavy storms
Explanation:
Gentle, long-lasting rain, sliding over the top of existing air mass and shown as red half circles on the map was an indicator of warm fronts whereas heavy storms, forcing existing air up into the atmosphere and shown as blue triangles on the map are indicators of cold fronts.
What are warm fronts?A warm front occurs when warm air mass overtakes colder air mass while moving forward resulting in the production of precipitation, clouds, or thunderstorms. A light rain or drizzle is also a result of warm fronts.
A cold front occurs when a cold air mass undercuts a warm air mass while moving forward. when the warm air is lifted by colder air, it causes clouds to condense resulting in thunderstorms, or even tornadoes. Severe weather accompanied by strong winds and low temperatures was created by cold fronts.
Warm fronts bring gentle, long-lasting rains, slide over the top of the existing air mass, and are shown as red half circles on the map whereas cold fronts bring heavy storms, forcing existing air up into the atmosphere, and shown as blue triangles on the map.
Therefore, warm fronts bring gentle and long-lasting rains, whereas cold fronts bring heavy storms.
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Select the best description of amino acid metabolism: Group of answer choices Amino acid metabolism does not occur. Aerobic metabolism of amino acid requires deamination. Metabolism of amino acids is the primary source of energy during long-duration exercise. Metabolism of amino acids is the primary source of energy during short bursts of activity. Can reduce urea production from ammonia in the liver.
Answer:
Aerobic metabolism of amino acid requires deamination
Explanation:
Living system can be defined as the internal systems of organisms and how materials circulate within organisms.
Generally, these living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc., which are typically used for carrying out various bodily functions such as respiration, digestion, metabolism, etc.
Metabolism can be defined as a set of chemical processes carried out by a living organism such as humans, plants and animals, in order to sustain life.
Aerobic (oxygen-using) metabolism can be defined as a biological process that typically involves the extraction of energy from any carbohydrate source such as amino acids, fatty acids, etc.
Basically, an aerobic metabolism of amino acid is a process that requires deamination.
Generally, proteins comprises of amino acids and it is responsible for maintaining the proper functioning of the body system.
Transamination can be defined as a biochemical process which typically involves the removal of amino groups from amino acids and transferring them to a ketoacid (amino acid without an amine group), so as to form new amino acids.
Basically, transamination is a reversible oxidation-reduction reaction that is responsible for the deamination of amino acids.
When Dr. Philip tierno conducted his experiment on the pillows , he wanted to know the connection between pillows and the allergy-causing germs. He was trying to answer the question, Do these pillows contain germs that contribute to the family allergies?
Answer:
Yes. That was the question he was trying to answer.
Explanation:
To conduct the experiment investigating the connection between pillows and disease-causing gems, Dr. Philip needs to ask himself whether the pillows that will be used in the research contain germs that contribute to allergies in a family. This question allows Dr. Philip to have the basis to start his research and come to a conclusion about the pillows used in the research. Furthermore, the research points directly to the main point of the story.
Answer:When Dr. Philip Tierno conducted his experiment on the pillows, he wanted to know the connection between pillows and the allergy-causing germs. He was trying to answer the question, Do these pillows contain germs that contribute to the family’s allergies?
Explanation:Edmentum
1. Identify Study the picture of the cockroach to the
right and identify some characteristics that
you could use to describe a cockroach
Answer:
you should use the head and the body to describe a cockroach
Explanation:
PLZZ HELP
Phosphorus is mainly found in the environment stored in
A. the atmosphere
OB. legumes
C. mineral deposits
D. denitrifying bacteria
Answers: I think it’s a or c
Explanation:
Which organism obtains its energy exclusively from dead or decaying matter?
Answer:
Bacteria obtains energy from dead bodies of animals and plants.
Based on how they each acted to the trials,witch substance (s)would most likely be metallic
Answer:
The answer should be C....and them unit test sure do suck no cap :,)
Explanation:
Which of the following molecules contains three phosphate groups?
A. AMP
B. ADP
C. APP
D. ATP
Answer:
D) ATP contains three phosphate groups.
OAmalOHopeO
