Adaptive immunity is developed after an organism is exposed to a disease. Lymphocytes, who years later respond to repeated exposure to the infection are called;
T CellsLymphocytes are basically classified into two namely, the B and T cells. The B cells give antibody-mediated immunity while the T cells provide cell-mediated immunity.
The memory cytotoxic T lymphocyte is stored as reserve in the body so that in the event of the reoccurrence of a disease, it will resolve itself into the cytotoxic T cell that will fight the disease antigen.
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The bottle of water that you are drinking may have been purified for you by a wetland or the root system of an entire forest. This is an example of:
This is an example of ecosystem service.
What are ecosystem services?Ecosystem services are the many and varied benefits to humans provided by the natural environment and from healthy ecosystems. Such ecosystems include, for example, agroecosystems, forest ecosystem, grassland ecosystems, and aquatic ecosystems.
Moreover, ecosystem services make human life possible by, for example, providing nutritious food and clean water, regulating disease and climate.
Therefore, it provide many of the basic services that make life possible for people. Plants clean air and filter water, bacteria decompose wastes, bees pollinate flowers, and tree roots hold soil in place to prevent erosion.
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Based on the data shown in the graph, which of the following best describes how ecologists could determine when this ecosystem is approaching a climax community?
A
Determine if the keystone species in the ecosystem is present two years after the volcanic eruption
B
Measure the biomass of the pioneer species present before and after the volcanic eruption
(C
Record the number and type of producers present every year after the eruption
D
Calculate the net primary productivity of a specific indicator species every year after the eruption
Scientists can tell that an ecosystem's climax is approaching when they record the number and type of producers present each year after the eruption, as shown in option C.
We can arrive at this answer because:
An ecological community reaches its climax when it reaches its last stage of ecological succession.At this stage, animals and plants are well developed and interact in a balanced way.Thus, the ecological region must have a considerably high number of producers, as it shows that the basis for interactions between living beings is well established.Thus, scientists must observe the number of producers that settle in each ecological succession, to be able to determine when the community is close to its climax.
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A moose eats a lily pad. The food the moose eats is used to make ATP energy that can be used in cellular processes. The products of photosynthesis are the reactants of cellular
respiration. What is included in D in the diagram above? Choose ALL that apply.
A) water
B) oxygen glucose
D) sunlight
E) carbon dioxide
Answer:
oxygen and glucose
your welcome i hope this helps
Explanation:
Oxygen and glucose molecules are produced by the process of photosynthesis which are sent to the mitochondria for the synthesis of ATP. Thus, the correct option is B.
What are cellular processes?
Cellular processes are the processes which are essential for living. This includes all the processes which are carried out at the cellular level, but these processes are not necessarily restricted to a single cell.
Photosynthesis is the process of formation of carbohydrates in the plant cells by the use of sunlight and carbon dioxide. The products glucose and oxygen formed in this process are utilized in the process of cellular respiration.
Cellular respiration is the process of ATP synthesis from the glucose and oxygen produced from the photosynthesis.
Therefore, the correct option is B.
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2. Protons have a ________ charge.
3. Neutrons have a ________ charge.
4. Electrons have a _______ charge
5. An atoms nucleus has a ________ charge.
6. The whole entire atom has a ______ charge .
7. An atoms atomic number is the number of ________________.
Answer:
2- Positive
3- Neutral
4- Negative
5- positive
6- neutral
7- protons
Hope I helped :)
An evil scientist’s evil lab assistant shoots you with a laser beam that erases all of the RNA in your cells, and removes your cells’ ability to create new RNA. Later on in the day, you trip and scrape your knee. Do you think that the scrape in your knee will ever heal? Why or why not.
Answer:
That scrape on our knee will never heal and the blood loss due to bleeding will never be replaced. This is because RNA is inside of cells and without the ability to create new RNA you cannot replace missing cells. So the scrape will never heal if your cells cannot create new RNA.
Explanation:
hope this helps. . . <3
Which of the following filters blood by using phagocytic cells?
Answer:
SPLEEN is correct
Explanation:
Please help me with this.
Answer:
Hi, i hope this explanation helps.
Explanation:
You are going to write a capital F above the top left square. And then a lowercase F on the square next to it (top right)
On the left hand side, write a capital F
A lowecase F below it. (on the sides of the squares)
Now you are going to combine letters, looking at the squares you will see which letters align. The top left square should read FF, top right fF... and so on.
good luck!
The function of the chromosome is best described as
a
regulating the production of specific proteins.
b
ensuring that the base pairs pair correctly.
c
the unit that contains the basic structural and functional unit of organisms.
d
he most important part of heredity.
pls someone im in a quiz i realy need the help anyone
Answer:
you need to explain better the question
my guess is maybe d number
seizures affect the muscles and cause all or part of the body to go limp
Answer:
wow, ty for this information. I will try to remember this
Explain the relationship between DNA, mRNA, and protein
Answer: In the first step, the information in DNA is transferred to a messenger RNA (mRNA) molecule by way of a process called transcription. ... The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein. Figure 2: The amino acids specified by each mRNA codon. DNA is the genetic code that stores the instructions to make a protein. mRNA is involved in reading DNA, in a process known as transcription. This mRNA is then processed b ribosomes to make proteins. The sequence of DNA determines the codons in mRNA, which determines the sequence of amino acids, which determines the protein being made.
Explanation:
Section 18.5:
1. a. Prokaryotes (Bacteria) are a key part of animal _______ systems
Answer:
Prokaryotes. Bacteria are amongst the simplest of organisms - they are made of single cells. Their cell structure is simpler than the cells of eukaryotes and cells are smaller, most are 0.2 μm - 2.0 μm. These cells do not contain membrane bound organelles such as a nucleus and mitochondria.
was lamarcks explication scientific? why or why not?
Answer:
Why or why not? Lamarck was a good scientist in that he proposed scientific explanations based on keen observations and the information he had available at his time. Without an understanding of genetics and heredity, Lamarck proposed a theory to explain the diversity of life that was logical and coherent.
What's the lifecycle of HPV? (HUMAN PAPILLOMAVIRUS)
Answer:
Explanation:
HPV DNA replication during its life cycle occurs in three separate phases (reviewed in [1, 2]). After viral entry into the cell nucleus and the activation of viral gene expression, the viral genome copy number increases to several hundred copies per cell during the initial phase of genome amplification.
A new species is discovered in a moderately warm climate. Its diet is primarily vegetarian. Large carnivorous birds are its main predators. This creature has sharp claws to dig tunnels to escape from carnivores. Which biome would this new species thrive in? What biome?
The biome in which this species lives is SAVANNA. This biome (savanna) is a transitional mixed woodland-grassland biome.
Savannas, also known as tropical grasslands, represent a type of grassland biome located in warm regions.
There are two main types of grasslands: savanna grasslands (low latitudes) and temperate grasslands (mid altitudes).
A grassland is a type of biome that shows these characteristics:
mainly dominated by a nearly continuous cover of grasses (instead of taller plants such as trees)semi-arid climatetwo well-defined seasons (wet and dry seasons).Learn more in:
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Oxygen is so pervasive in the environment that it would be very difficult for a microbe to always avoid physical contact with it. What, therefore, is the most obvious way for a microbe to avoid damage
What is adaptive radiation? in your own words
Answer:
the diversification of a group of organisms into forms filling different ecological niches.
Explanation:
Help with whatever yk plzzzzz!!!!! ‼️‼️‼️‼️‼️
Answer:
Triglycerides are lipid compounds composed of a glycerol esterified to 3 fatty acid chains of varying length and composition.
fat molecules yield more energy than carbohydrates and are an important source of energy for the human body.
Explanation: this is all I know, hope it helps :)
what is the difference between a knockout animal and a transgenic animal?
Explanation:
A knockout animal has definite inactivated of DNA
A transgenic animal usually has a unknown activated piece of DNA
The major difference between a knockout animal and a transgenic animal is that in a transgenic animal, a foreign gene is integrated into its genetic material, while in knockout animals, targeted genes either are rendered nonfunctional or are altered.
What do you mean by Transgenic animals?A transgenic animal may be defined as a living organism or cell in which its genome has been altered by the introduction of one or more foreign DNA sequences from another species by artificial means. These organisms are generated in the laboratory for research purposes.
When it comes to knockout animals, they are also generated in the laboratory for research purposes. But the mechanism of action is different here.
In these animals, their specific gene sequence is silenced or their function is terminated. They do not involve any insertion of foreign gene particles.
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Based on the genetic code chart above, which of the following would be the result of this single base-pair substitution?.
The nonsense mutation is a point mutation that originates a new stop codon within the sequence. The result of this single base-pair substitution is A nonsense mutation resulting in early termination of translation. OPTION E
------------------------
When a change occurs in a single base pair, it is known as a point mutation.
Points mutations might be either silent, missense, or nonsense.
In silent mutations, the resulting mRNA codon codes for the same amino acid as the unmutated sequence. If the mutation causes the mRNA codon to code for a different amino acid, this mutation is a missense mutation. Finally, if the mutation causes the mRNA codon to be a stop codon, we are referring to a nonsense mutation.In the exposed example,
30 31 32 33 34 35 36 37 38 39
Original sequence G C U A U U A A C A
Mutated sequence G C U A U A A A C A
The mutation occurs in base number 35. An adenine replaces the original uracil.
Since only a single base changes, this is a point mutation.
This point mutation originates a new stop codon, which places before the stop codon of the original sequence (UAG) .
We are referring, then, to a NONSENSE MUTATION.
The options are:
A. a silent mutation (no change in the amino acid sequence of the protein)
INCORRECT. It is not a silent mutation
B. a frameshift mutation causing extensive change in the amino acid sequence of the protein
INCORRECT. It does not extensive change in the amino acid sequence
C. a missense mutation causing a single amino acid change in the protein
INCORRECT. It is not a missense mutation.
D. a frameshift mutation causing a single amino acid change in the protein
INCORRECT. It is not a frameshift mutation.
E. a nonsense mutation resulting in early termination of translation
CORRECT. The change of a single base produces a new stop codon placed before the original one.
The result of this single base-pair substitution is A nonsense mutation resulting in early termination of translation. OPTION E
--------------------------
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1. Read this statement: Biotechnology uses chemicals exclusively for removing pharmaceuticals (medicines) from wastewater. Which part of the statement is not true?
Biotechnology uses chemicals in wastewater. Pharmaceuticals are found in wastewater. Medicines are removed from wastewater. Chemicals are used to break down waste.
2. Characteristics of temperate grasslands include which of the following?
High temperature and precipitation
Distinct seasons, low precipitation
Wet and dry seasons, high temperatures
High temperatures, low summer rainfall
Owing to low annual precipitation, there are few trees in the temperate grassland. There are distinct seasons in temperate grasslands.
Biotechnology refers to the use of living organisms to achieve various purposes. Living organisms have been used to synthesize biological molecules, carry out water treatment among others. Hence the statement; "chemicals are used to break down waste" is not in sync with biotechnology since microorganisms rather than chemicals are used to breakdown waste water in biotechnology.
Temperate grasslands experience distinct seasons and low precipitation throughout the year. Owing to this low annual precipitation, there are few trees in the temperate grassland.
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Answer:
for part 2 it's three
Explanation:
I took the test
One part of the elbow joint is where the trochlear notch of the ______ articulates with the ______ of the humerus.
Answer:
Ulna, trochlea
Explanation:
A teacher was teaching a class on the gases in the atmosphere that absorb and reflect radiation and help warm the
the Earth's surface. These gases are called _____ gases
A) atmospheric
B) ultraradiation
C) greenhouse
D) ozone
E harmful
help asap!!
Answer:
greenhouse gasses
Explanation:
100% on edge 2022
How a fresh water/aquatic ecosystem can change into a land ecosystem over time. Support your explanation with evidence and include pictures.
If you answer correctly ill mark as brainliest!!
Answer:
i think this is the answer i also need to do this for my homework so i need to know if its correct
Explanation:
As the temperature increases the water starts to evaporate once the water evaporates there will be less water in lakes, rivers, and more. The more the temperature increases the more water evaporates so after it evaporates the aquatic ecosystem change to land ecosystem overtime. and may also cause fossils to be in land ecosystems such as in mountains and more
Question 1
A) Skin cells(1 point)
have terminally differentiated.
become senescent quickly.
continually replicate.
become quiescent quickly.
.
Question 2
A) Which cell type undergoes terminal differentiation?(1 point)
hair cells
heart cells
stem cells
epithelial cells
Question 3
A) DNA replicates in the(1 point)
cell membrane.
endoplasmic reticulum.
cytoplasm.
nucleus.
Question 4
A) Which of the following might affect gene expression in a complex organism?(1 point)
the ability to reverse terminal differentiation
the number of chromosomes being copied
the types of cells near the site
the amount of time a cell takes to replicate DNA
Question 5
A) What replicates during mitosis?(1 point)
organelles
proteins
cytoplasm
cells
Answer:
1)become sediment quickly
2)heart cells
3)nucleus
4)the types of cells near the site
5)cells
Explanation:
I just took the test
As skin ages, it is subjected to a variety of internal stresses and external assaults, all of which can result in cellular damage. Thus, option B is correct.
What are the special properties of skin cells?Skin stem cells, which are multipotent adult stem cells that may self-renew and develop into many skin cell lineages, are present in adult skin.
Skin stem cells are active both during normal aging skin renewal and during wound healing. The body's barrier organ, the skin, is inherently vulnerable to a variety of stressors that affect its shape and functionality.
In response, cells are given a number of alternative chemical options, one of which involves senescence, a permanent cell-cycle arrest.
Senescent cells have been observed to accumulate with age and may play a role in diseases and changes to the skin that are brought on by aging.
Therefore, skin cells become senescent quickly.
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True or False: Muscles can contract even when there is no visible movement.
Answer:
TRUE
Explanation: is correct
What is adenosinetriphosphate?
Answer:
Adenosine triphosphate is an organic compound and hydrotrope that provides energy to drive many processes in living cells, such as muscle contraction, nerve impulse propagation, condensate dissolution, and chemical synthesis. It is also called ATP.
Explanation:
Answer: denosine triphosphate (ATP) is the source of energy for use and storage at the cellular level. The structure of ATP is a nucleoside triphosphate, consisting of a nitrogenous base (adenine), a ribose sugar, and three serially bonded phosphate groups.
Explanation:
100 POINTS!!!!
How does matter and energy cycle through the living and nonliving parts of an ecosystem? In five sentences, please.
Matter and energy cycle through the living and nonliving parts of the ecosystem in the form of chemical compounds. Some chemical compounds make up living organisms that are called 'organic compounds'. Chemicals in the ecosystem are recycled. Some of the organic compounds of living organisms are returned to the ecosystem. Some of the organic compounds make up dead organisms. Some organic compounds are returned as nutrients to the ecosystem. Dead producers and consumers provide matter and energy to decomposers. Dead decomposers recycle dead matter, and the dead matter is returned to the ecosystem. All matter and energy are then returned to the ecosystem in one way or another. The matter and energy of the ecosystem can be recycled indefinitely because it is constantly being produced and consumed.
What % of oxygen comes from the ocean?
None
All
At least half
Rewatch
Submit
what is the main enzyme used during transcription?
Answer: RNA polymerase
Transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors. Transcription factors can bind to specific DNA sequences called enhancer and promoter sequences in order to recruit RNA polymerase to an appropriate transcription site.
what is the process that help form existing rock into metamorphic rock?
A. compaction/Cementation
B. heat/pressure
C. weathering/Erosion
D. melting
Answer: B
Explanation:
