Answer:
Only differentiation creates more of the same types of cells. ... Only self-renewal creates more of the same types of cells. Only self-renewal depends on gene expression
Answer:
Only differentiation creates more of the same types of cells. ... Only self-renewal creates more of the same types of cells. Only self-renewal depends on gene expression.
Explanation:
please give me brain list and follow
How did scientists determine that gorillas are closely related to humans?
Which of the following increases the amount of water in the atmosphere
Answer:
Transpiration
Explanation:
This is the process of water evaporating from plants into the atmosphere.
what are the two phases of the respiratory movement of man? Are they the same in a grasshopper or a fish?
The two phases of the respiratory movement of man is inspiration ( or inhalation) and expiration (or exhalation). The phases of the respiratory movement of men is the same in fish because they also inhale and exhale.
What is inspiration (inhalation ) ?
Inspiration (inhalation) is the process of taking air into the lungs. It is the active phase of ventilation because it is the result of muscle contraction.
What is expiration (exhalation)?
Expiration (exhalation) is the process of letting air out of the lungs during the breathing cycle.
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Which observation best explains how the landform in the image was created ! PLEASE HELP !!!!!!!
Answer:
dreams have been formed through the process of erosion
Explanation:
because it looks like little water streams cutting through the rock so it must have been eroded
2. What does proper disposal of hazardous waste prevent?
mRNA has 1500 bases. If all of them are used for coding amino acids, the number of amino acids in polypeptides will be ?
Answer:
499
Explanation:
Tubelike cells that carry food from the leaves to other parts of the plant are called?
Question 1 options:
Xylem
Phloem
Chloroplasts
Answer: Phloem carry food from the leaves to other parts of the plant
Explanation: Xylem carry water and Chloroplasts are organelles in cells wich allow the plant to photosynthesise
What process puts new gene segments into the genes of a corn plant to produce a new variety of corn that is resistant to disease?
O adapting
O cloning
O genetic engineering
O selective breeding
Answer:
selective breeding............
Genetic engineering allows the modification in the DNA of an organism. To obtain a disease free plant, genetic engineering is carried out. Thus, option c is the correct answer.
What is genetic engineering?Genetic engineering is a tool used in biotechnology to bring modifications or alterations in the genetic material - DNA of an organism. It modifies the DNA through addition of a gene segment or deletion of a gene.
In genetic engineering process, a specific gene of interest or the desired genetic sequence is selected. It then inserted into a cloning vector to allow its replication in the host gene. The so called 'recombinant' then formed is inserted into the host through various insertion techniques.
Genetic engineering thus allows the selection of a disease free plant, pest resistance or temperature resistant plant. A new variety of the plant can be obtained through genetic engineering.
The genome of an organism can thus be edited where the unhealthy genes can be eliminated through genetic engineering.
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What genetic trait allows organisms to survive natural selection in their
environments?
Answer:
Adaptations
Explanation:
You are studying ion channels and have set up model lipid vesicles containing the three following transporters:
1. a Na+ /H+ antiporter driven by the Na+ concentration gradient.
2. The common 3Na+ /2K+ pump.
3. K+ leak channels. The experiments are designed such that all three transporters are oriented in the model lipid bilayers in the same direction they would be in the plasma membrane of a cell and that concentration gradients in vitro mimic the concentration gradients experienced by cells (e.g., the extracellular Na+ concentration is similar to the concentration outside of the vesicle whereas the concentration in the lumen of the model vesicles is similar to intracellular Na+ levels).
Required:
a. Draw the arrangement and ion flow of the three types of transporters in the model membranes.
b. What do you predict will happen to the pH of the vesicle lumen if you treat the model membranes with the drug oubain that impairs function of the 3Na+/2K+ pump? Briefly explain your answer in terms of what happens with each transporter.
Answer and Explanation:
a) you will find the arrangement and ion flow of the three types of transporters in the model membranes in the attached files.
K+ leak channels are channel proteins that allow K⁺ to leave the cell in favor of its concentration gradient. It keeps a stable equilibrium by taking out K⁺ that the 3Na+ /2K+ pump brings into the cell. Any alteration in the pump leads to an alteration in the leak channel functioning. Na+ /H+ antiporter is an integral membrane protein, and a secondary transporter is responsible for the interchange of H+ and Na+ through the membrane with no use of energy. It regulates pH within the cell. It responds to the Na+ and H+ concentration gradient, determined by the 3Na+ /2K+ pump. An alteration in the pump functioning produces a change in the Na gradient and consequently affects the antiporter interchange action. 3Na+ /2K+ pump is an integral protein that transports K+ and Na+ against the electrochemical gradient. A significant amount of energy is used to make the pump function. It brings K+ into the cell and takes Na+ out of it. It keeps the membrane potential and the electrochemical gradient constant. The pump function is associated with the leak channels and the antiporters function.Under normal conditions, the cell interior has a lower pH than the exterior. The K+ concentration is higher in the interior, while the Na+ concentration is higher in the cell exterior. The interior of the cell is always more electronegative than the cell exterior.
b)
The drug ouabain inhibits the pump. It impedes the Na+ exit and the K+ entrance. It occurs a sharp increase in the Na+ intracellular concentration, which influences the Na+ /H+ antiporter that changes the ions´ direction, taking out Na+ and bringing in H+ to compensate the intracellular Na+ excess. There is also a decrease in the leak channel function, which does not allow K+ to leave the cell.
Whenever the pump is inhibited, there is an increase in the intracellular pH, because Na+ concentration increases in the interior.
Signals from nearby cells on how to differentiate are examples of an:
internal cue
external cue
Answer:
External Cue..........
Answer:
I just want points
Explanation:
Mutation in the hemoglobin gene can cause sickle-cell anemia. The defective protein found in sickle-cell anemia causes red blood cells to “sickle”—become a misshapen C shape. These misshapen cells abnormally stick to each other and can become trapped by leukocytes (white blood cells) that are rolling or paused on the endothelial cells lining the vessel. This causes blockages of small blood vessels, causing severe pain and strokes called vaso-occlusive crisis. A new drug that binds and blocks selectin proteins is in phase III clinical trials to test for improvement in patients' symptoms. Why might this be an effective treatment for vaso-occlusive crisis?
The organelle that is the site of cellular respiration is the
o mitochondrion
O nucleus
o chloroplast
o ribosome
Answer:
hope this helps
Explanation:
mitochondrion
Answer:
mitochondrion
Explanation:
Plz mark brainliest thanks
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A scientist finds a tiny fragment of a bone too small to be classified by its appearance. The scientist studies the tiny fragment and concludes that it belonged to an ancient primate species. How was the scientist able to classify the bone?
Answer:
Through a microscope.
Explanation:
A stereozoom microscope is a handy instrument for magnifying small features on the surface of a bone.
Answer:
Through a microscope
Explanation:
I just know
Which word describes organisms in the Kingdom of bacteria
A. Multicellular
B. Prokaryote
C. Unicellular
D. Eukaryote
Answer:
d) eukaryote
Explanation:
all fungi are eukaryotic in nature
5000+1000+500+50 what is its answer
Answer:
6550
Explanation:
That is the sum and you can also use a calculator to find the sum
The unit of measurement for forces is called
Answer:
I am pretty sure its called a Newton=unit of force
What temperature system is used by most of the world
Answer:
The temp system used by most of the world is Celcius
Answer:
The metric system, including Celsius, is the official system of measurement for almost all countries in the world. Most scientific fields measure temperature using the Celsius scale. Zero degrees Celsius is the freezing point of water, and 100 degrees Celsius is the boiling point of water.
Explanation:
Plzzz help I’m sooo confusseeddd
Answer:
Explanation:
allows more people to be president
Early genetic manipulation of petunias included an attempt to engineer dark purple petals. To this end, extra copies of the gene that causes purple pigment was engineered to be produced in the petunia. However, to the surprise of many, the plants carrying the extra copies of the purple gene were completely white or only had patches of color. Molecular analysis revealed that the purple gene was reduced 50-fold in the engineered plants compared to wild type. Provide a possible explanation how this occurred. Also, provide a possible experiment that may overcome this setback
Answer:
The altered pigmentation in transgenic petunia plants is caused by the RNA interference (RNAi) mechanism
Explanation:
The RNA interference mechanism is a naturally occurring mechanism by which single-stranded RNA molecules can bind to complementary mRNAs in order to inhibit gene expression, blocking translation and leading to mRNA degradation. The example above described is a classical genetic experiment (Napoli et al. 1990 ) that showed the existence of the RNAi pathway by the overexpression of a chimeric chalcone synthase (CHS) gene in pigmented petunia flowers, which blocked anthocyanin biosynthesis. In this experiment, irregularly bicolored/white flowers in transgenic petunias containing exogenous pigmentation genes were developed. The co‑suppression of gene expression was produced by the high-copy-number transcription of the CHS transgene, showing the existence of an undescribed RNAi silencing mechanism. Somatic reversion of the altered phenotype can be achieved by restoring the normal mRNA levels for these pigmentation genes, e.g., by a progeny testing in order to eliminate transgenic CHS expression.
An unknown bacterium has been inoculated onto a Mannitol Salt Agar plate and incubated at 37 degrees C. After 48 hours, you observe the plate. What interpretations and conclusions can be made from this result
Explanation:
Halotolerant is the ability of the organism to grow at the higher concentration of salt than the required concentration for its growth.
As we know Mannitol salt is used as selective medium for isolation of pathogenic bacteria. The medium has mannitol salt, phenol red indicator, 7.5% sodium chloride. This high salt concentration inhibits the growth of most bacteria.
The interpretations and the conclusion regarding to the given situation should be explained below.
What is Halotolerant?It is the capability of the organism for growing at a higher concentration of salt as compared to the concentration with respect to the growth. Since Mannitol salt should be applied as the selective medium for isolation of pathogenic bacteria. The medium contained the mannitol salt, phenol red indicator, 7.5% sodium chloride.
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function of nervous tissue
A phycologist is interested in testing the claim that the proportion of algae from a local rivulet that belonged to the particular phylum cyanobacteria is at least half. A random sample of 50 alga was obtained and each alga was categorized as either being cyanobacteria or not. It was found that 38 were, in fact, cyanobacteria. The test statistic for this hypothesis test is...
Answer:
The test statistic for this hypothesis test is - 3.68.
Explanation:
A test statistic is a random variable that is calculated from sample data and used in a hypothesis test. You can use test statistics to determine whether to reject the null hypothesis. The test statistic compares your data with what is expected under the null hypothesis.
Sample proportion = 38/50
= 0.76
Hence,
Test statistic
[tex]= \frac{0.76-0.50}{\sqrt{0.50*0.50/50}}[/tex]
= 3.68
Question 1 (1 point)
Tubelike cells that carry food from the leaves to other parts of the plant are called?
Question 1 options:
Xlyem
Phloem
Choloropasts
Question 2 (1 point)
Liverworts are non vascular plants and grow?
Question 2 options:
On tree tops
Flat and close to the ground
Tall like trees
Question 3 (1 point)
Structures that anchor vascular plants and take in water and minerals are?
Question 3 options:
stems
leaves
roots
flowers
Question 4 (1 point)
Which of the following is not true of mosses, liverworts, and hornworts?
Question 4 options:
They are non-vascular plants.
They have true roots, stems, and leaves
They grow in moist places.
They are small and low-growing.
Question 5 (1 point)
Which is the best explanation of water transport in a non-vascular plant like the one shown below?
Question 5 options:
Water moves only in the roots.
Water moves from cell to cell.
Water moves through a system of tubes.
Water moves directly to the flowers from the roots.
Question 6 (1 point)
Looking at the diagram above. What is the function of the anther?
Question 6 options:
catches the sticky pollen
produces the pollen
becomes the fruit
passage tube for pollen
Answer:
1) xlyem
2) flat and close to the ground
3) roots
4) they have true roots, stems, and leaves
5) water moves from cell to cell
6) produces pollen
Explanation:
The answers to the following questions are as follow:
1) xylem
2) flat and close to the ground
3) roots
4) they have true roots, stems, and leaves
5) water moves from cell to cell
6) produces pollen
What are vascular plants?Vascular plants are a group of plants that have specialized tissues for conducting water, minerals, and nutrients throughout the plant. These specialized tissues, called vascular tissue, consist of xylem and phloem.
Xylem is a type of vascular tissue that is responsible for transporting water and minerals from the roots to the rest of the plant. It consists of tubes made of dead cells with thick cell walls that form a continuous network throughout the plant.
Phloem is another type of vascular tissue that is responsible for transporting sugars and other nutrients throughout the plant. It consists of tubes made of living cells that are arranged in a circular pattern around the xylem.
Vascular plants are important because they are able to grow to larger sizes than non-vascular plants due to their ability to transport water and nutrients throughout the plant. Examples of vascular plants include trees, grasses, and flowers.
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what type of symbiotic relationship is between the anémone and the clow fish?
A.Commensalism
B.Paratism
C.Predation
D.Mutualism
The answer is D. Mutualism
What the consequences would be if the entire water surface was covered with water lilies
Answer: There can be a ton of damage done if water lilies overgrow.
Explanation:
Water lilies protect the organisms under the body of water and provide shade to the plants and organisms underneath. These are very important for organisms, as they also provide a place to rest. But if the entire water surface were to be covered with water lilies, this would be a major problem, because sunlight would have no way of reaching below the surface, and this would decrease oxygen levels for plants and organisms. Without air and sunlight, plants will start to die and organisms of the body of water will also start to die because of no air to breathe. Also, overgrowth of water lilies causes water stagnation and leads to excessive algae blooms. The stagnant water attracts insects like mosquitoes, cockroaches, termites, and more pests which can harm plants and organisms.
Poiseille's law is often used to calculated the arteriolar blood flow. According the this law, the following all affect blood flow:-radius of vessel-length of vessel-viscosity of blood-pressure gradientWhich of these has the GREATEST affect on blood flow?
Answer:
a. radius of vessel
While they aren't spiders, Grandaddy Long legs, Horseshoe Crabs, and
Scorpions all belong to this group of organisms. *
Insecta
Crustacea
Arachnida
Nemertea
wait i may be dum but it sounds like your stating something rather then asking.. could you maybe reword the question?
Where do substrates bind on an enzyme?
active site
surface receptor
voltage-gated
channels
calcium channels
PLEASE HELP PLEASE!!!!!
why is it difficult for scientists to study the mechanism of evolution
Answer:
Because evolution is not a simple process and it is hard to accurately determine how a species evolved or what the species evolved from.