Answer:
I think option (A) is right answer
Answer:
a
Explanation:
In cell culture experiments, purified B cells expressing IgM can be induced to switch to producing IgE by stimulating them with an antibody to CD40 (a stimulatory antibody) plus the cytokine IL-4. In an individual undergoing an immune response, these signals would normally be provided by:
Answer:
TFH cells in the germinal center
Explanation:
The Tfh cells, present in the germinal center, are responsible for maturing and stimulating the class change of immunoglobulins (such as the change from IgM to IgE). This change could stimulate the new classes of immunoglobulins to act with stimulating antibodies to produce an immune response.
It is important to point out that the germinal center is the activated point of a lymphoid follicle that contains B and T lymphocytes, which act in the memory of the cells of the immune system.
Các tuyến nào sau đây được gọi là các tuyến pha?
Answer:
tuyến tụy, tuyến sinh dục
Explanation:
Uplift and formation of a mountain range divide a freshwater snail species into two isolated populations. Erosion eventually lowers the mountain range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of
Answer:
Sympatric speciation
Explanation:
Sympatric speciation is the evolution of a new species from a surviving ancestral species while both continue to inhabit the same geographic region.
There are four different combinations of offspring genotypes in every Punnett square. Fill in the blanks below to complete the ratio for the Punnet square shown to the right.
Where's the Punnett square?
Which factors most influence whether a person will develop Alzheimer's disease?
Answer:
Hereditary transmission of the defected genes to the offspring.
Explanation:
activity
piz help me lpiz
Answer:
biotic --> trees,plants,fish,humans,dog,cat,hen.....
abotic --> vehicles,stone,rock,wood, chappal,pen.........
Explanation:
biotic is living things....
abotic is non living things
B cells respond to the initial antigen challenge by ________. forming of a large number of B cells and T cells that display surface antibodies different from the original B cell producing progeny cells that include plasma cells and memory cells with surface antibodies different from the original B cell forming of a large number of B cells and T cells that display surface antibodies identical to the original B cell producing pyrogens to initiate fever producing progeny cells that include plasma cells and memory cells with surface antibodies identical to the original B cell
Answer:
Producing progeny cells that include plasma cells and memory cells
Explanation:
B cells are essential cells in the constitution of the body's immunity. These cells are responsible for developing the so-called humoral immunity that is capable of neutralizing and destroying foreign substances that do not belong to the organism, that is, the B cells are capable of destroying antigens. To destroy the antigens, B cells start a production of descendant cells that are made up of plasma cells and memory cells.
In taxonomy, the kingdom that has the simplest life forms is (A) Animalia,
(B) Fungi. (C) Protista. (D) Plantae. (E) Monera,
Fur color is a trait controlled by a dominant over recessive gene. The fur color is either brown or black.
Two brown mice and produce 12 offspring. Three (25%) of the offspring produced are black fur and nine (75%) have brown fur.
Based on the above data, answer the follow questions.
State which fur color is dominant (1 pt each).
State which fur color is recessive (1 pt each).
What is the genotype for the black fur (1 pt )
What is the genotypes for the brown fur (2 pts )
Answer:
Dominant: Brown colored fur
Recessive: Black colored fur
Black Fur Genotype: bb
Brown Fur Genotype: BB, Bb, or bB
Explanation:
B = Brown
b = Black
Why there is a variation of weather in two different parts of India, though climate
was summer?
Answer:
Due to distance from the equator.
Explanation:
There is a variation of weather in two different parts of India, though climate was summer because both parts experience different amount of sunlight. There are some regions in India which is located on the equator so they experience very hot weather while on the other hand, some regions are present at a large distance from the equator so direct sunlight does not occur and the temperature is moderately warm.
when making a circle graph what angle represents 20%
Answer:
The central angle is 20% of 360°, that is
central angle = \frac{20}{100}
100
20
× 360° = 0.2 × 360° = 72° → C
Write the different function of different type of teeth.
Answer:
to help break down food.
help in digestion due to enzymes.
What is a genotype???????
Answer: A genotype is an individual's collection of genes.
Explanation:
Climate change is expected to alter the ocean’s temperature, salinity, acidity, and currents. What would you want to investigate to find out how these changes would affect the way oceanic bacteria will process dissolved organic carbon in the future?
Answer:
Even though an individual phytoplankton is tiny, there are many of them in the ocean. Their combined effect on atmospheric CO2 is comparable to that of every plant on land. ... Then they exude altered dissolved organic carbon into the water (the bacterial equivalent of pee and poop) and respire carbon dioxide into the air.
Explanation:
answer f and g urgently
it relates to the picture
The human heart weighs how many pounds
After careful consideration your answer is...
Just about 1 pound
*Hope I helped*
~Alanna~
1 lb (pound)
Explanation:
it is the answer.
What is the term for a female reproductive cell?
sperm
egg
tetrad
embryo
Answer:
Second choice; egg
Explanation:
Gametes are an organism's reproductive cells.
- Female gametes are called ova or egg cells
- Male gametes are called sperm
A tetrad consists of four chromatids, and a chromatid is one half of a duplicated chromosome.
An embryo is an unborn offspring (child) developing.
Answer:
Egg
Explanation:
The egg also known as ovum is the female reproductive cell.
Why do we shiver when it is cold?
A. It is the brain stimulating the person to move to a warmer location.
B. It is an involuntary reaction that does not actually help our body.
C. The rapid twitching of the muscles generates heat.
D. It is a side-effect of the pancreas signaling to the brain that it is losing heat.
Answer:
C. The rapid twitching of the muscles generates heat.
Explanation:
When the body detects that it is cold, it will shiver in an attempt to create heat.
The rapid loosening and tightening of the muscles in this process creates heat.
This is a involuntary and natural response that helps return the body back to homeostasis and maintain a normal temperature.
So, the correct answer is C. The rapid twitching of the muscles generates heat.
Answer:
C. The rapid twitching of the muscles generates heat.
Explanation:
When someone feels cold, tiny sensors in your skin send messages to your brain telling you that you need to warm up.
What type of mutation is caused when a codon that corresponds to one of the twenty
amino acids specified by the genetic code is changed to a chain-terminating codon?
A nonsense mutation
B silent mutation
C chromosomal mutation
D missense mutation
Is Brewer's yeast a type of bacteria
Explanation:
Brewer's yeast is an ingredient used in the production of beer and bread. It is made from Saccharomyces cerevisiae, a one-celled fungus. ... Brewer's yeast is considered a probiotic and is used to aid digestion.
Answer:
Well Brewers Yeast is actually a Probiotic, and well a bacteria as well,
but its a good bacteria.
Explanation:
Each chromosome is like a package that contains numerous _____. Dna molecules. Traits. Genes. Cells. Help needed ASAP
Answer:
Each chromosome is like a package that contains numerous genes.
I hope this helps
Both mitochondria and chloroplast have about the same function as…
. animal cells.
. eukaryotic cells.
. prokaryotic cells.
Answer:
Prokaryotic cells.
Hope this helps :)
Which prediction is true based on this population pyramid?
The population is not growing.
The population is growing slowly.
The population is growing rapidly.
The population is declining.
Explain how the changes in the villi of a person with coeliac disease may cause the person to lose weight and have low amounts of vitamins and minerals in their body
Answer:
The changes in the villi of a person with coeliac disease may cause the person to lose weight and have low amounts of vitamins and minerals in their body because Villi absorb vitamins, minerals and other nutrients from the food you eat.Identify the correct bonding between nitrogen bases in DNA molecule from given pair.
a. A=C
b. A=G
c. A=U
d. A=T
Answer:
It's not A or B. I hope that helps you a bit.
Explanation:
Answer:
A=T is the correct bonding between nitrogen bases in DNA molecule
A specimane collection helps a scientsist do research by:
A. Asembling a large number of sample comparisons
B.providing a way to afford even the most expensive equpment
C.creating a realistic depiction of an imaginary undersea world
D.summerizing the results of an other scientists investigations
Answer A:
Explanation:
Which of the following is not one of the steps of the water cycle?
A. Condensation of water vapor into clouds.
B. Throughflow of underground water back to the ocean.
C. Respiration of water into the atmosphere.
D. Transpiration of water into the atmosphere.
The option that is not one of the steps of the water cycle includes options C(Respiration of water into the atmosphere)
and D(Transpiration of water into the atmosphere).
Water cycle can be defined as the constant flow or movement of water through earth, atmosphere and the oceans either in liquid states or vapour.
The four main steps of water cycle includes:
EvaporationCondensationprecipitation and Collection (this leads to formation of underground water which gradually flows back into the oceans).In nature, water circulates mainly within the abiotic (non-living) environment; only a small proportion recycled through living organisms.
Therefore respiration and transpiration which occurs through living organisms doesn't form the major steps of water cycle, hence the correct option is C (Respiration of water into the atmosphere) and D (Transpiration of water into the atmosphere).
Learn more about water cycle here:
https://brainly.com/question/458815
Identify parts A and C.
Answer:
A. Liver B. Stomach
Explanation:
Liver detoxifies chemicals and metabolize drugs, stomach mixes the food and grind it
A: Liver
C: Stomach
hope it helps!!!!
If a cell has 10 chromosomes when it begins mitosis, how many will it have immediately afterword?
Answer:
Explanation:
Therefore, there will be two daughter cells at the end of mitosis. Each will have 10 chromosomes, if the parent cell has 10. The chromsomes will not have sister chromatids because after mitosis, the duplicated pairs have separated into the two daughter cells. The cells will each be diploid, just as the parent cell was.
Explanation:
If a cell has 10 chromosomes when it begins mitosis, there are 15 will have immediately afterword.
what is the final product of tranlation
Answer:
polypeptide
Explanation:
The amino acid sequence is the final result of translation, and is known as a polypeptide. Polypeptides can then undergo folding to become functional proteins.
