Cell-mediated immunity involves the activation of different specialized cells present in the immune system.
What is cell-mediated immunity?Cell-mediated immunity is a type of adaptive immune response that involves the activation of different specialized cells present in the immune system.
These cells include, among others, phagocytes (macrophages), cytotoxic T-lymphocytes, etc.
Cell-mediated immunity also involves the release of chemical messengers such as cytokines that activate immune responses (e.g. inflammation).
These immune responses act in a concerted mode to recognize and attack antigens present in the flu virus.
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A point mutation occurs such that a codon is changed from aga to agc. Which term describes this mutation?.
Answer:
below
Explanation:
since A is replaced by C, it is called Substitution.
What is the major evidence for the punctuated equilibrium model of evolution?.
1. Brittle deformation is generally seen in
a. rocks far below Earth's surface
b. rocks with strong internal molecular bonds
c. limestone and schist
d. gypsum and shale
Answer:
Brittle deformation is seen in - Rocks that are present far below the earth's surface.Explanation:
option a is correctAnswer:
(b) rocks far below Earth's surface
Neutrons are neutral. This means that
A.
neutrons are not involved in chemical reactions.
B.
neutrons do not have a charge.
C.
neutrons are neither acidic nor basic.
D.
neutrons do not have mass.
Answer:
The ansow is B: Netrons do not have a charge.
Answer:
its b
Explanation:
Select all of the following that are TRUE regarding prokaryotic and eukaryotic cells.
prokaryotic cells have a nucleus, eukaryotic cells have a nucleiod a
region
Both cells contain the organelle the ribosome
Eukaryotic cells have mitochondria; prokaryotic cells do not
Eukaryotic cells contain DNA; prokaryotic cells do not
Both cell types contain membrane bound
organelles
Which of the following is not part of cell theory?
A
Cells are the basic unit of life in all organisms.
B
All living things come from one or more cells.
с
All cells must be able to make their own food.
D
All cells come from existing cells.
Why does fossil fuel use in the united states make the u.s. vulnerable to the political wishes of foreign countries? a. the us is a net exporter of fossil fuels. b. fossil fuels lead to global climate change. c. the us imports much of its petroleum from foreign countries which set the prices. d. all of the above. please select the best answer from the choices provided a b c d
The US imports much of its petroleum from foreign countries which set the prices.
What are fossil fuels?The trem fossil fuels refers to those fuels that are obtain from carbon by mining sucg as coal, crude oil and natural gas. The US often imports a large quantity of these fossil fuels friom other countries.
Hence, the US is vulnerable to the political wishes of foreign countries because, the US imports much of its petroleum from foreign countries which set the prices.
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Answer:
C
Explanation:
look at the pic :)
PLEASE HELP ME IM TIMED
Answer:
A. codominance
Explanation:
Codominance is in which at least two characteristics are involved together of a particular feature get expressed into an offspring.
Both the mother and father's type are expressed. The offspring with alleles A and B for blood type has type AB blood. The alleles are codominant -- neither one alone determines the blood type.
The rest of the choices do not fit the phenomena.
hope this helps!
Describe how urban development can increase flooding.
Answer:The changes in land use associated with urban development affect flooding in many ways. Removing vegetation and soil, grading the land surface, and constructing drainage networks increase runoff to streams from rainfall and snowmelt.
Explanation:
What is the most common symptom of amygdala lesions in humans?.
Answer:
Inability to recognize the facial expression of fear
Explanation:
Some common signs and symptoms following amygdala damage include: Inability to visually recognize surrounding objects. The tendency to inspect surrounding objects by smelling or chewing them. Irresistible need to explore the surrounding space and excessive reactions to visual stimuli
Which of these chemicals affect everyone differently?
Your answer:
O Carcinogens
O Teratogens
O Neurotoxins
O Allergens
Biodiversity is described as Group of answer choices The influence of physical factors on an environment The range of different species in an environment The seasonal and daily changes in an environment The way species differ from one another
Answer:
the range of different species in an environment
Explanation:
hope this helps
37) Most of Oxygen resource is from
photosynthesis that happen
in ..........
A.
rainforests
B.
soil
C.
ocean
D.
river and lakes
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Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean.[tex]\purple{\rule{15mm}{2.9pt}} \red{\rule18mm{2.5pt}} \orange{ \rule18mm{2.5pt}}[/tex]
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An export processing zone is __________. a. another name for the top five economies in the world b. the line that divides the world into developed and underdeveloped nations c. a region of a nation that is especially vulnerable to widespread disease d. a region of a nation that gives favorable tax rates to corporations
An export processing zone is a region of a nation that gives favorable tax rates to corporations.
What do you mean by Export processing zone?An export processing zone may be defined as a customs area where one is allowed to import plant, machinery, equipment, and material for the manufacture of export goods under security, without payment of duty.
This export processing zone is responsible for all the activities and duties associated with any goods and services which are exported from other nations.
Therefore, an export processing zone is a region of a nation that gives favorable tax rates to corporations.
To learn more about the Export processing zone, refer to the link;
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Answer:
D) A region of a nation that gives favorable tax rates to corperations
Explanation:
does anyone have the answers to this?
here is the answer! :)
7,950 cm should be correct! sorry if its not it tried! <33
Step-by-step explanation:
if you divide 75 by 97 it should turn out
as 7,950! and there's your answer <33
have a good day!!!
Cellular ______ is all of the chemical reactions in cells.
Activity
metabolism
enzymes
Cellular Metabolism is all of the chemical reactions in cells.
Definition: Cell metabolism is the series of processes that take place in living organisms to sustain those organisms.Hope that helps!
Answer:
metabolism
Explanation:
the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.
Describe the process in which trees communicate with one another
Answer:
Trees share water and nutrients through the networks, and also use them to communicate. They send distress signals about drought and disease, for example, or insect attacks, and other trees alter their behavior when they receive these messages.
During which phase of meiosis do the sister chromatids line up across from each other in the center of the cell?.
Sister chromatids line up across from each other in the center of the cell in the metaphase II stage of meiosis.
What is meiosis?Meiosis is the type of cell division that involves the formation of four daughter cells that are genetically different from one another.
The stages involved in meiosis are as follows:
Prophase I and IIMetaphase I and IIAnaphase I and IITelophase I and IIChromosomes align at the equator of the cell at the metaphase stage. However, sister chromatids specifically line up at the cell equator at metaphase II of meiosis.
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All enzymes are examples of which type of organic molecule?.
A chicken has 39 pairs of chromosomes and a human has 23 pairs of chromosomes. The four nitrogen bases (adenine, thymine, guanine & cytosine) are the same for both the chicken and human. What makes chicken DNA different from human DNA?
Do animals have more traits in common as adults, or as developing embryos? Explain your
answer.
Answer:
they do have a lot of traits in common as adult.
Canine teeth of human beings are called vestigial organs and archaeopteryx is called a bridge animal,why?
Canine teeth are not as useful as it is in animals while archaeopteryx has the character of both birds and reptiles.
What are vestigial organs?The vestigial organs are those organs that have no apparent function in the body which means that the body can do without them.
Examples of vestigial organs in the body are:
appendixwisdom teethThe canine teeth is a type of teeth in mammalian dentition and is said to be vestigial because man can do without it.
Archaeopteryx are animals that has the characteristics of both birds and reptiles because it bears wings like birds and has hands it uses to crawl like a reptile.
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Wood project
Is this slime mold?
Yes, that is slime mold.
Answer:
Affirmative, that is slime mold.
Why does mass determine how fast and how much energy a star can generate?
Answer:
A star's life is a fight against gravity, and the gravity is related to mass. Without gravity and mass, stars could not exist in the sky.
Evaluate your understanding with the following question: 4. Which statement best describes cell theory? a. Cells are part of complex organisms that work together to produce new cells. b. Cells perform a single life function, and most cells come from existing cells. c. Cells use energy from food to be able to perform life functions and work together to produce new cells. d. Cells are the basic unit of structure for all organisms, and all cells come from existing cells.
Answer:
d. Cells are the basic unit of structure for all organisms, and all cells come from existing cells.
Cells are the basic unit of structure for all organisms, and all cells come from existing cells.
Describes cell theory?
The cell theory states that all living organisms are composed of cells which are the basic unit of life and all life come from preexisting life. All living organisms are made up of cells i.e. unicellular and multicellular
So we can conclude that option D is the correct answer.
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When charged particles of __________________ pass through the southern or northern
hemispheres of Earth they form Auroras.
A. coronal mass ejections B. solar flares
C. prominence D. solar winds
Other photo for bill he video
The above diagram illustrates how nature recycles what natural resources?
The diagram illustrates how nature recycles carbon through the various spheres of the globe.
Carbon cycleThe diagram illustrates the cycling of carbon.
Carbon is an important element in nature and cycles through various spheres of the globe.
One of the reservoirs of carbon is the atmosphere - it exists as carbon dioxide. The supply in the atmosphere is maintained by burning, respiration and decay of living organisms, volcanic eruption etc.
Carbon is fixed into living organisms (the biosphere) via photosynthesis.
More on the carbon cycle can be found here: https://brainly.com/question/1627609
why cant biotic factors be composed of cells
Answer:
True
Explanation:
Because they can't be living, as abotic factors need cells to function. biotic don't need any cells because they are nonliving, such as a rock or a bed.
What type of physical weathering is caused by the expansion of water?
Answer:
Frost wedging
Explanation:
Is a natural result of the fact that water expands when it freezes.
