Answer:
Memory B lymphocytes.
Explanation:
Bm lymphocytes are cells involved in the secondary innate humoral immune response. They're also, like other B cells, produce antibodies after the first exposure with an antigen and then produce large amounts of antibodies shortly after another exposure to the same antigen.
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Neutral theory proposes that
A) molecular clocks are more reliable when the surrounding pH is close to 7.0.
B) most mutations of highly conserved DNA sequences should have no functional effect.
C) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R groups) have a neutral pH.
D) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R groups) have a neutral electrical charge.
E) a significant proportion of mutations are not acted upon by natural selection.
Answer:
The correct answer is E) a significant proportion of mutations are not acted upon by natural selection.
Explanation:
The neutral theory, proposed by Motoo Kimura in 1968, proposes that part of the molecular variability produced by mutations that exists in populations is natural variability, that is, a large part of the genetic variation observed in populations is due to random fluctuation of genetic variants that are neutral, on which natural selection hardly acts, so they are not an evolutionary force since they do not contribute predominantly to natural selection and proposes genetic drift as an evolutionary mechanism.
What are two different characteristics that scientists examine to classify living things?
a. blood characteristics and naming characteristics
b.chemical characteristics and DNA characteristics
c.physical characteristics and chemical characteristics
d. physical characteristics and environmental characteristics
Characteristics such as appearance, reproduction, mobility, and functionality are just a few ways in which living organisms are grouped together. These specialized groups are collectively called the classification of living things.
Scientists examine the physical and chemical properties of organisms to classify them. Thus, the correct option is C.
The physical characteristics of organisms include the macroscopic and microscopic characteristics such as body's structure, the type of specialized tissue present, the skin type, the cellular structure
The chemical characteristics of organisms include the cellular composition, the type of proteins present, the organ/tissue system present, the DNA composition, the enzymes present, the metabolic processes that occur.
Thus, the correct option is C.
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how many new cells does your body produce every day ?
Answer: your body replaces around 330 billion cells per day. At that rate, your body is making over 3.8 million new cells every second.
Answer:
330 billion cells
Explanation:
330 cells every day are replaced equivalent to about 1 percent of all our cells. 3.8 million every second
The GLUT transporter moves glucose through a transport protein in the same direction as its concentration gradient. The action of the glucose transporter is an example of _____________. The SGLT transporter uses the sodium concentration gradient created by the sodium potassium ATPase to move glucose against its concentration gradient. The action of the SGLT transporter is an example of _______________.
Answer:
The correct answer is - facilitated transport and secondary active transport.
Explanation:
GLUT transporter is a glucose transporter that helps in moving the glucose to its concentration gradient through the cell membrane. It is a transport protein that uses passive transport of facilitated transport that moves down their concentration gradient and therefore does not require chemical energy from ATP hydrolysis in the transport step.
Sodium-based GLUT or SGLT is also a glucose transport protein that exhibits secondary active transport as it develops electrochemical potential difference by moving ions out of the cell membrane, this gradient allows the movement of ions and molecules.
draw the metaphase stage of mitosis in plant cell with chromosomes
Answer:
get a life sci study guide it will help u
AMP-PNP is a non-hydrolyzable analog of ATP that can bind to proteins in a similar manner as ATP but is no longer hydrolyzed. Predict what would happen to helicase activity if AMP-PNP were added to a DNA replication reaction. Choose one: A. Helicase would function normally, since AMP-PNP is not the same as ATP and would not bind to helicase. B. Helicase would function normally, since AMP-PNP is an analog of ATP and would function in the place of ATP. C. Helicase would function faster than normal, since the AMP-PNP is not hydrolyzed. ATP binding induces conformational changes, but hydrolysis slows DNA unwinding by helicase. D. Helicase would no longer function, since the AMP-PNP is not hydrolyzed. ATP binding and hydrolysis induce the conformational changes that facilitate DNA unwinding by helicase.
Answer:
The correct answer is - D. Helicase would no longer function, since the AMP-PNP is not hydrolyzed. ATP binding and hydrolysis induce the conformational changes that facilitate DNA unwinding by helicase.
Explanation:
During the replication process, helicase unzips or unwinds the double-stranded DNA. Helicase is a motor protein that uses ATP molecule hydrolysis in order to break the H-bonding between the strands of DNA.
If AMP-PNP added during DNA replication then it will bind to helicase and remains bound to helicase due to fact that it is a nonhydrolyzable ATP analog.
how the skin cells, neurons, muscle cells, and blood cells you have observed relate to the functions of skin, nerve, muscle, and blood tissue?
Answer:
All the type of cels perform different kind of functions that are specific to them.
Explanation:
Every cell has its own work to do but different cells may have different functions in multicellular organisms, cell with the same type of job often work together.
These groups of specialized cells from tissue in turn, the tissue often group together to form larger units called organs the heart is an organ; so is the stomach.
3.5.2 Test (CST): Computer-Scored Unit Test
Question 18 of 25
Why does having a genetically diverse population make a species more likely
to survive a change to the environment?
A. They are more likely to reach carrying capacity.
B. They are more likely to have harmful mutations.
C. They are more likely to become an invasive species.
D. They are more likely to have some individuals adapted for survival.
Answer:
D
Explanation:
Looks correct if you go with D
Genetically diverse population make a species more likely to survive a change to the environment because they are more likely to have some individuals adapted for survival. Thus, the correct option will be D.
What are Genetic variations?Genetic variation is the difference in the DNA molecule among different individuals or the differences between different populations of a species. The multiple sources of genetic variation include changes which could result from mutation and genetic recombination.
Mutations are the ultimate sources of genetic variation in a population, however other mechanisms, such as genetic drift, also contribute to it, as well. The populations which are genetically diverse are more likely to have some individuals adapted for survival.
Therefore, the correct option will be D.
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give 5 application of Charles law
Answer:
Try out a turkey timer. Pop-up turkey thermometers work by applying Charles' Law. The thermometer is placed in the turkey. As the temperature rises and the turkey cooks, the air in the thermometer expands to pop the plunger
how did adaptive radiation affect plants after they first moved to land
Explanation:
it gradually stops seed growth and sprouting depending on how much radiation is released.If there is too much evaporation due to intense radiation,the stomata closes to reserve water and if the stomata is unable to open for a long period of time the growth of the plant is stunted.The change in the circled offspring’s genotype was caused by a mutation. A mutation is a change in a gene. Mutations happen when a mistake is made when a cell’s chromosomes are copied. How might mutations introduce variation into a population? EXPLAIN
there will be changes in the number of chromosomes
A mutation is a change in a gene. Mutations happen when a mistake is made when a cell’s chromosomes are copied. Mutations introduce variation into a population by changing the genome and introducing new changes that might or might not be beneficial.
What is mutation ?It is defined as the change that is caused in terms of certain type of change that is introduced by knowingly or unknowingly.
A mutation is a change in a gene. Mutations happen when a mistake is made when a cell’s chromosomes are copied. Suppose if a genetic codon AUG has to be inserted by the mRNA which earlier has to code for methionine and was a start codon but with time U got replaced and the new codon is made which changes the expression.
Mutations that are born are none other than insertion of some other amino acids or codon , deletion of some bases and other mutations as well which leads to the variation in the species.
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Translation occurs in the ribosome and is important because
Answer: Translation takes place inside structures called ribosomes, which are made of RNA and protein. Ribosomes organize translation and catalyze the reaction that joins amino acids to make a protein chain. A ribosome is shown with mRNA and tRNA.
Explanation:
Hope it helps you if not sorry
10.What were we trying to prove about Mars by making our claims about
the channel on Mars?
that Mars was once habitable
that Mars was better to live on than the Earth
that Mars had rocks
that Mars had volcanoes
that there once lived humans on mars
Answer: That mars was once habitable.
Explanation:
mars was habitable just like earth, until it’s magnetosphere weakened and it lost its atmosphere.
by which process does air move into the lungs?
Answer:
When you breathe in, the diaphragm moves downward toward the abdomen, and the rib muscles pull the ribs upward and outward. This makes the chest cavity bigger and pulls air through the nose or mouth into the lungs.
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Answer:
respiratory system
Explanation:
The respiratory system is the network of organs and tissues that help you breathe. It includes your airways, lungs, and blood vessels. The muscles that power your lungs are also part of the respiratory system. These parts work together to move oxygen throughout the body and clean out waste gases like carbon dioxide.
Hope this helps
Resources that humans have thanks to biodiversity are:
A.Textiles
B. Wood products
C. Compounds used in medicines
D. all of the above.
Answer:
D. tất cả các ý trên
Explanation:
I just need number one I need to fill in the blanks
. Revisa las etiquetas de los alimentos que tengas en tu casa para ver si hay alguno vencido. ¿Qué le recomendarías a tu familia? ¿Por qué?
Answer:
Para comer alimentos sanos y frescos.
Explicación:
Recomiendo a mi familia los alimentos que aún no están vencidos o que son frescos porque los alimentos frescos hacen que nuestra condición de salud sea buena en comparación con los alimentos vencidos. Hay un crecimiento de patógenos como bacterias, hongos, etc.en los alimentos que los hacen dañinos para las personas y causan intoxicación alimentaria en las personas que los consumen, por eso tenemos que ver las etiquetas presentes en los alimentos para verificar su condiciones.
What part of the body is not working as it should when you have coronavirus
Answer: The abdomen mainly the heart and brain.
Explanation: Corona virus mainly attacks the lungs
clogging them up with mucus making it hard to breath
this can disrupt airflow throught the blood.
QUESTION 3
3.1 The diagram below shows a cholera bacterium. It has been magnified 50 000
times
A
В
1 mm - 1000um
3.1.1 Name structure C.
(1)
3.1.2 State the function of structure C.
3.1.3 Calculate the actual width of the cholera bacterium between points X
and Y. Give your answer in micrometers (um). Show all working
(2)
Answer:
Looks hard
Explanation:
I dont know how to do this
Actual width of the cholera bacterium between points X and Y is: 6.5 mm × (1,000 um/1 mm) = 6,500 um.
What is cholera bacterium?The cholera bacterium is a single-celled, rod-shaped bacterium called Vibrio cholerae. It is a type of bacteria that can cause severe diarrhea and dehydration if ingested through contaminated water or food.
The actual width of the cholera bacterium between points X and Y can be calculated as follows:
Width of the bacterium on the diagram = 0.06 cm
Magnification = 50,000 times
Actual width of the bacterium = (width on the diagram) / magnification
= (0.06 cm) / (50,000)
= 0.0000012 cm = 0.012 µm (micrometers)
Thus, the structure C is flagellum and its function is to provide locomotion.
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Your question seems incomplete, the probable complete question is:
The Earth is also called a/an
a) Population
b) Ecosystem
c) Biosphere
d) Species
Need a bit of helpppppppppppppppppppppp thank you
Explanation:
If the concentration of molecules outside the cell is very high relative to the internal cell concentration, the rate of diffusion will also be high. If the internal and external concentrations are similar (low concentration gradient) the rate of diffusion will be low.
what do you mean by the chromatin fibres ?
Hey buddy I am here to help!
Chromatin fibers are coiled and condensed to form chromosomes. Chromatin makes it possible for a number of cell processes to occur including DNA replication, transcription, DNA repair, genetic recombination, and cell division.
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What is the relationship of gravity to Earth, the sun and moons?
Explanation:
Our sun is 27 million times larger than our moon. Based on its mass, the sun's gravitational attraction to the Earth is more than 177 times greater than that of the moon to the Earth.
What is gigantism??
What is it caused by??
Answer: Gigantism is most commonly caused by a benign tumor on the pituitary gland called a pituitary adenoma. A number of disorders may also cause it, including neurofibromatosis.
Explanation:
McCune-Albright syndrome (MAS)
Cellulose is found throughout the cell wall of plant cells so cellulose make cells walls Ridgid which indicates that Cellulose is a
Ecotourism can provide an incentive for local people to preserve the environment in order to attract more visitors, but sometimes development is done with little planning for long-term environmental impacts. On a small island in the Caribbean, a local group is considering opening a resort for ecotourism. If they wish to build a sustainable and ecofriendly business, what should be the next steps in their plan?
A. Investigate the ecological impacts and gather evidence on which to base their decisions
B. Hire an agent to locate a suitable property and start developing infrastructure
C. Market the development to investors and explain ecotourism to them to raise money for the resort
D. Determine what types of activities the resort will offer and hire staff
Answer: The next steps in their plan should be to (Investigate the ecological impacts and gather evidence on which to base their decisions). The correct option is A.
Explanation:
ECOTOURISM is defined as the visitation of individuals (tourist) to natural areas that conserve the environment and sustains the well-being of the local people. It has to do with the interaction of the biotic components of the natural environment by tourists. This has the advantage of providing an incentive for the local inhabitants but can cause a long term negative environmental impact of not properly planned.
Conservation of these natural resources improves the quality of lives. It enables the inhabitants to live in a clean and healthy environment (eco-friendly). To set up a tourism center, certain rules and regulations needs to be met in order to avoid endangering both the biotic and abiotic components of the ecosystem. Therefore these local groups should investigate the ecological impacts and gather evidence on which to base their decisions. This would help conclude if a particular selected environment is conducive.
True or false
Transpiration pull will be stronger on a hot, humid day more than on a hot
dry day.
Question 8 of 10
Which question can be answered using the scientific process?
you need ot put the thing
Answer: Answer: Option D is the correct one. Science consists of methodsical activities that formulate hypotheses by using observations and experiments in order to address scientific questions.
Explanation:
I can't see the questions but i did this before sooo I may or may not be correct
Solve the following. Show your solution.
1.) 820.0 mL of air is at 30.0 °C. What is the volume at
55.0 °C?
can you help. me?
Answer:1503.3 mL
Explanation:
So we can know that it is direct proportion, so the volume at 55.0 C is 55/30 X 820 so it is 1503mL
What is the human female reproductive cycle regulated by?
hope this helps
Answer:
The menstrual cycle is regulated by hormones. Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone.