Answer:
1. A stem cells can be defined as totipotent cells because they have the capacity to self renew themselves.
Spinal cord injury leads to loss of nervous tissue also loss of motor and sensory function, currently there is no such treatment available that can completely repair the spinal cord, but the transplant of stem cells may help in the spinal cord repair.
The stem cells could never replace the nerve cells that died as a result of the injury, stem cells can help the nerve cells to repair.
2.Other medical uses are:
To repair the damaged organs or tissues Correct the genetic defects safely testing of new drug.
A form of simple cittusion is Osmosis. In which direction will water flow in the process of Osmosis?
A. Water will flow from low concentration to higher concentration
B. Water will flow with the solutes, against the concentration gradient
C. Water will flow towards the solutes (.e. toward the higher salt concentration)
D. Water will flow away from the solutes, with the concentration gradient
Answer: D
Explanation:
osmosis, water always moves from an area of higher water concentration to one of lower concentration.
how does air pollution affect an ecosystem? NEED HELP ASAP
Answer:
It can cause most animals to get sick or die
Explanation:
Where does a hydrogen bond form between 2 water molecules?
Answer:
Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.
Answer:
The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions. I hope this helps, I looked it up on google.
Explanation:
Exercise is physical activity quith the goal of improving physical fitness.
Please select the best answer from the choices provided.
ОТ
OF
Answer:
true
Explanation:
I cant tell if yoire saying t or f as the answers. but I am quite sure this woukd be true because having the goal of phsycial fitness whike being active woukd be considered excercise
Each strand of s DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown. DNDA Strand 3' _|___|___|___|___|___|___|___|___|___|___|___|___|_ 5' T G T A G C T G C G C G T Which DNA strand is complementary to the one shown above?
Answer:
The complementary DNA strand, according to the nucleotide sequence of the other strand is 3' - A C A T C G A C G C G C A - 5'
Explanation:
Each strand of DNA is made up of specific sequences of the four nucleotides present in this molecule, adenine, thymine, cytosine and guanine.
In double-stranded DNA, one strand complements the other —according to the complementarity of nitrogenous bases— where a purine, adenine and guanine, are joined with a pyrimidine, thymine and cytosine, respectively:
Adenine is complemented with Thymine. Guanine is complemented with Cytosine.According to this, the complementarity of the strands is:
5' - T G T A G C T G C G C G T - 3'
3' - A C A T C G A C G C G C A - 5'
The DNA strands remain linked by hydrogen bonds between their nitrogenous bases, until such time as they must be separated for transcription.
Click on 11:50am. What did Ben’s muscles produce when he ran after his paper.
Answer:
i guess heat or tension? muscles dont produce much
Explanation:
what did his muscles produce? the only thing i can think of would be tension, because muscles dont produce sweat, heat would also be an option
I need help with this I don’t know how to use the chart and I need help on questions 2-3
Answer:
2. The relationship between O2 levels and arterial blood shows that the oxygen level was not affected, from rest to exercise to rest.
3. The relationship between O2 levels and venous blood shows that the oxygen level decreased when exercise was being performed, and the oxygen level returned to normal when resting.
Explanation:
You will NOT find a cell wall in which of these kind of organisms?
Answer:
Algae and fungi do not have cell wall and many other organisms do not have a cell wall.You can check it out on google for more examples.
Explanation:
Which of the following processes produces the most ATP? a aerobic respiration b glycolysis c alcoholic fermentation d lactic acid fermentation
Answer:
b) glycolysis
Explanation:
Up to 36 ATP can be produced from one glucose molecule through aerobic reactions. Therefore, option (A) is correct.
What is aerobic respiration?Aerobic respiration supplies energy to fuel all cellular functions. The reactions result in the production of ATP, which can then be put to use to power other life-sustaining processes, such as growth, repair, and maintenance.
The release of energy that was stored in carbohydrates and lipids during photosynthesis and the subsequent availability of that energy to living organisms is the purpose of the series of enzyme-controlled events known as aerobic respiration.
Glycolysis, the Krebs cycle and respiratory electron transport contribute to the production of 36 ATP for every molecule of glucose that is used up during aerobic cell respiration.
Learn more about aerobic respiration, here:
https://brainly.com/question/12605249
#SPJ2
The main function of the rough endoplasmic reticulum is the production of Q
1. mitochondria and proteins secreted by the cell.
2. hydrogen peroxide and steroid hormones secreted by the cell.
3. ribosomes and steroid hormones.
4. membrane and proteins secreted by the cell.
Answer:
4. Membrane and proteins secreted by the cell
Explanation:
Endoplasmic reticulum (ER) is one of the organelle that makes up the endomembrane system of eukaryotes. The ER is of two types viz: rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER).
The RER is called "rough" because of the ribosome organelles that are attached to its surface. The attachment of this ribosomes (site of protein synthesis) also defines its function. The RER is principally involved in the production of protein. Hence, the Rough Endoplasmic Reticulum functions mainly in the production of membrane and proteins secreted by the cell.
The main function of the RER is the production of membrane and secretory proteins. Option D is correct.
Rough endoplasmic reticulum (RER) :
It is a membranous organelle that is a part endo-membrane system in the cell.
The ribosomes are attached to the RER, that make its appearance rough. Protein produced by the ribosomes is transferred to the RER lumen. Then it is modified and secreted.Therefore, the main function of the RER is the production of membrane and secretory proteins.
To know more about Endoplasmic reticulum,
https://brainly.com/question/787183
The genetic material is arranged differently in the cell of bacteria compared with animal and plant cells.
Describe two differences.
Answer:
unlike bacteria cells, plant and animal cells both have membrane. Bacteria cells lack membrane. Bacteria multiple by binary fission.
Animal and plant cells contain linear chromosomes. Bacteria have one circular chromosone and no nucleus. Plasmids carry genetic material in some bacteria.
What is bacteria?Bacteria are unicellular organisms that are very tiny. Bacteria can be found practically anywhere on Earth and play an essential role in the ecosystems that exist there. Some animals are able to survive in environments with both high temperatures and high pressures.
Both plant and animal cells store their genetic material in the form of chromosomes, which are linear structures. Bacteria do not possess a truly organized nucleus and instead contain a single chromosone that is round. Plasmids are tiny circular pieces of genetic material that can be carried by some bacteria. These plasmids carry additional genetic material.
Learn more about bacteria's, here:
https://brainly.com/question/15647167
#SPJ2
Nitrogen fixation is done mostly by....
Answer:
Nitrogen fixation occurs between some termites and fungi. It occurs naturally in the air by means of NO x production by lightning. All biological nitrogen fixation is effected by enzymes called nitrogenases. These enzymes contain iron, often with a second metal, usually molybdenum but sometimes vanadium.
Explanation:
Answer:
Rhizobium and blue green algae
In which direction does the gas tail always point?
A. In front of the comet.
B. Away from the sun.
C. Back along the comet's path.
D. Toward the sun
Answer:
Option B i.e Away from the sun
Explaination:
Gas tails will always point away from the sun because of the radiation pressure of sunlight.
Donna has observed that her father can control the speed of their grandfather clock by adjusting
the height of the weight on the end of the pendulum. Donna thinks that the pendulum will move
faster when the weight is lowered, and wants to test her idea. Donna gets a stopwatch and
measures the time it takes for the pendulum to swing twenty times when the weight is moved to
its lowest position. Donna begins to move the pendulum up by 1 cm and continues to measure
the time for twenty swings of the pendulum. Donna records her data.
What is would the hypothesis be, Independent/dependent variable, the constants and the control group of this experiment?
Thanks!
Answer:
Hypothesis: IF the weight is lowered, THEN the pendulum will move faster
Independent variable: Weight on the end of pendulum
Dependent variable: Speed of the pendulum
Constant: Same pendulum, same stopwatch
Control group: when the weight is moved to its lowest position.
Explanation:
- Hypothesis is a testable explanation given to proffer solution to an observed problem or answer a scientific question. In this investigation, Donna thinks that the pendulum will move faster when the weight is lowered. Hence, Donna's hypothesis is IF the weight is lowered, THEN the pendulum will move faster.
- Independent variable is the variable that is changed or manipulated in an experiment. In this experiment, WEIGHT on the end of pendulum is the independent variable.
- Dependent variable is the variable that is measured or recorded in an experiment. In this case, the dependent variable is the SPEED of the pendulum.
- Constant is the variable that is kept unchanged for all groups throughout the experiment. In this experiment, the constants are Same pendulum used, same stopwatch
- Control group is the group that doesn't receive the experimental treatment in an experiment. In this case, the control is when the weight is moved to its lowest position.
What are the functions of a catalyst in a reaction? select all that apply
A)sped up the reaction.
B:Increase the activation energy needed
C: lower the activation energy needed
D:maintain the reaction
E: slow down the reaction
Answer:A, C
Explanation:
Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.
1. Hot coffee is stirred with a spoon, the spoon gets hot due to _______________. 2. A chair is placed several feet from a fire in a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of_______________. 3. A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to _______________.
Answer:
Explanation:
1.Hot coffee is stirred with a spoon, the spoon gets hot due to _______________.conduction
2.The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of_______________. Radiation
3. A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to _______________.Convection
hope this helps
Answer:
1) Conduction.
Heat transfers to a spoon as the heat energy is passed from the coffee to the spoon through conduction.
2) Radiation
The heat on the glass surface gets radiated into the chair which causes the chair to warm up.
3) Convection
The globs are hot and less dense, which rises to the top whereas the cold globs are more dense which causes it to settle down.
Help me!!!!
It's 7th grade science
Answer:
do not have a nucleus is the answer to the second one
small DNA floats freely in the membrane
With the magnification of 10x through the lens of the eyepiece and the shortest objective, you get how much magnification?
100x
40x
400x
1000x
With magnification of 10x through the lens of the eyepiece and the medium length objective, you get how much magnification?
100x
40x
400x
1000x
(i just chose random answers so don’t mind that but I need HELP!!)
Answer:
10x to shortest is 40x
1x to medium is 100x
Pleas help help needed
An analogy makes a comparison between objects based on their similar qualities. Cassidy wanted to create an analogy for the motion of atoms in solids, liquids, and gases, so she compared them to marbles in a tray.
Which best compares the phases of matter to marbles in a tray?
A solid is like the tray being shaken and the marbles moving around it, and a liquid is like the tray being shaken slowly and all the marbles moving in their positions.
A solid is like the tray being shaken slowly and all the marbles moving in their positions, a liquid is like the tray being shaken and the marbles moving around it, and a gas is like the tray being shaken hard and the marbles moving vigorously around it.
A gas is like the tray being shaken slowly and all the marbles moving in their positions, and a solid is like the tray being shaken hard and the marbles moving vigorously around it.
A liquid is like the tray being shaken hard and the marbles moving vigorously around it, and a gas is
Answer:
A solid is like the tray being shaken slowly and all the marbles moving in their positions, a liquid is like the tray being shaken and the marbles moving around it, and a gas is like the tray being shaken hard and the marbles moving vigorously around it.
Answer:
B). A solid is like the tray being shaken slowly and all the marbles moving in their positions, a liquid is like the tray being shaken and the marbles moving around it, and a gas is like the tray being shaken hard and the marbles moving vigorously around it.
Explanation:
What is a station model and what types of data are identified by a station model?
It has to be in your own words ill give brainliest
Answer:
Meteorologists created the station model to fit a number of weather elements into a small space on weather maps. This allows map users to analyze patterns in atmospheric pressure, temperature, wind speed and direction, cloud cover, precipitation, and other parameters.
Explanation:
hii, can somebody please answer this me? thank youuuuuu
Answer:
There are varying factors that affects the complexity increase of human population, some of them are particularly medicine and non stop development and modernization.
I will award 60 points :)
When completing fruit fly crosses, what is counted at the end of the cross?
A.parent flies only
B.offspring and parent flies together
C.offspring flies only
Answer:
A complete fruit fly crossing requires that at the end of the crossing only offspring flies be counted
Explanation:
The fruit fly —Drosophila melanogaster— was one of the species used by Mendel to carry out his experiences related to genetics. Its rapid reproduction allowed the observation of hereditary characteristics —such as eye color and wing size— in the offspring.
Any experiment in genetics involving the crossing of fruit flies must ultimately take into account the offspring flies, their characteristics and phenotypic proportions.
Regarding the other options:
The characteristics and number of the parent flies are data already known before the crossing of fruit flies, so they do not represent a relevant data to be taken into account at the end of the crossing.
For each statement below, write true or false. ______ 5. Seismic waves change speed and direction when they encounter different materials.______ 6. P-waves travel through Earth's mantle.______ 7. S-waves do not travel through Earth's mantle.______ 8. Surface waves are the first to arrive at a seismic station.______ 9. P-waves are bent when they strike the core.______ 10. On seismograms, seismic waves recorded from more distant facilities are closer together than those recorded from facilities close to the epicenter.______ 11. S-waves do not enter the core because they cannot travel through solids.______ 12. Seismologists have reasoned that Earth's outer core must be liquid based on the disappearance of S-waves.______ 13. Studies of how waves reflect deep inside Earth show that Earth's inner core is solid.______ 14. The P-wave shadow zone does not receive direct P-waves.
Answer 1:
Seismic waves change speed and direction when they encounter different materials: True
Explanation:
When a rock suddenly breaks withing the earth or there is an explosion, it releases vibrations that flow across the earth as waves. These waves are called Seismic waves. The change in speed and direction of the waves as they encounter different materials is called refraction.
Answer 2:
P-waves travel through Earth's mantle: True
Explanation:
Another name for a P-wave is Primary Wave. They are a type of seismic wave and are known to be faster in the speed of travel than other types of seismic waves. They travel through the earth's mantle in compressional and extensional forms. They have the ability to alter the volume of rocks through which they travel.
Answer 3:
S-waves do not travel through Earth's mantle: False
Explanation:
Also known as secondary waves, or shear waves, S-waves can travel through the objects. They occur after an earthquake and have the ability to forcefully dislocate or shake in a back and forth manner, the land that is perpendicular to its direction of travel.
Answer 4
Surface waves are the first to arrive at a seismic station: False
Explanation:
The first wave to arrive at a Seismographic station (which is an observatory for recording, and processing shockwaves, oscillations of the earth generated by earthquakes and other deep earth movements) is the Primary Wave or P-Wave.
Answer 5:
P-waves are bent when they strike the core: True
Explanation
The core of the earth comprises predominantly of Iron and Nickel. Because of the strength and structure of the core, the P-waves can still pass through but have their speed slowed very significantly and refracted.
Answer 6:
On seismograms, seismic waves recorded from more distant facilities are closer together than those recorded from facilities close to the epicenter.: False
Explanation
On seismograms, seismic waves recorded from more distant facilities are father than those recorded from facilities close to the epicenter.
P-waves are known to be faster than S-waves. The difference between the speed in both waves are known constants. Thus the farther the distance of the waves from the point of an earthquake or epicenter, the farther apart they are.
Answer 7:
S-waves do not enter the core because they cannot travel through solids: False
Answer 8:
Seismologists have reasoned that Earth's outer core must be liquid based on the disappearance of S-waves. True
Answer 9:
Studies of how waves reflect deep inside Earth show that Earth's inner core is solid. True
Answer 10:
The P-wave shadow zone does not receive direct P-waves: True
The following statements shows if they are true or false properties of the S and P waves
5. Seismic waves change speed and direction when they encounter different materials is a True statement
6. P-waves travel through Earth's mantle is a True statement
7.S-waves do not travel through Earth's mantle is a False statement
8. Surface waves are the first to arrive at a seismic station is a True statement.
9.P-waves are bent when they strike the core is a true statement
10. On seismograms, seismic waves recorded from more distant facilities are closer together than those recorded from facilities close to the epicenter is a False statement
11.S-waves do not enter the core because they cannot travel through solids is a False statement
12.Seismologists have reasoned that Earth's outer core must be liquid based on the disappearance of S-waves is a True statement
13.Studies of how waves reflect deep inside Earth show that Earth's inner core is solid is a True statement
14.The P-wave shadow zone does not receive direct P-waves is a True statement
Read more on https://brainly.com/question/18760562
what is hypothesized to have caused the early primitive oceans to form our planet
Answer:
Explanation:
The primitive oceans formed from volcanoes at the beginning of time. When they blew up they released water vapour into the air. As the earth's crust cooled down, the water vapour condensed forming clouds, and water. The water fell as rain, which went down into the basins forming oceans. Scientists think they formed 4 billion years ago.
A different number of these ions
An ion is an atom that has different number of protons and electrons. An isotope is an atom of an element with a specific number of neutrons. Two different isotopes of the same element will have two different neutron counts.
Explanation:
How does water use affect land ?
Answer:
All land uses have an effect on water quality, whether positive or negative. ... In built-up areas with pavement and buildings, little rainfall soaks into the soil, causing high runoff, stream flows with high peaks and low flows in between, and poorer water quality.
Explanation:
Hope this helped! Have an AMAZING day/night!!
Answer:
Surface-Water Contamination and Land Use A variety of natural and human factors can affect the quality and use of streams, lakes, and rivers, known as surface water. One of the most important factors that can affect the quality of a surface-water body is the land use within its watershed.
Explanation:
Select the correct answer.
The bones of the tarsus and foot are stronger than the bones in the wrist and hand.
O A.
True
OB.
False
Answer:
True, this is because they are used to keep balance and hold your own body weight, your wrist and hand shouldn't, that is why your arms and legs are for lifting heavy stuff. So that is why your tarsus and foot are stronger.
Answer: True
Explanation: OWare ;)
What does the term frameshift mean in science
Answer:
A frameshift mutation is a type of mutation involving the insertion or deletion of a nucleotide in which the number of deleted base pairs is not divisible by three.
Explanation:
Answer:
A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called nucleotides.
HOPE IT WILL HELP U!
A chemical compound has
A. a fixed molecular formula
B. an unstable molecular formula
C. a single element
1.what is the meaning of synapse
2.explain how an impulse is transmitted across a synapse
Answer:
Hope this helps you. Sorry for the handwriting.