Answer:
In chromatography, the solvent front is the position on the TLC plate indicating the furthest distance travelled by the developing solvent (or eluent) Once a TLC place is developed in a TLC chamber, the plate is removed from the chamber and a pencil is used to quickly mark the furthest point travelled by the solvent
Choose
A neuron is said to be resting? *
________
When it is not transmitting an impulse
When it is transmitting an impulse
When the inner surface of the neuron is more positive
All are correct
Explanation:
i think all are correct
i guess?
The soft-solid like layer that is below the tectonic plate which allows for movement is called the...
A. Lithosphere
B. Mantle
C. Crust
D. Asthenosphere
help me help me help me please
Answer:
B
Explanation:
How can a model of the solar system be used in planning a trip from Earth to another planet? A To estimate distance, travel time and fuel cost. B To anticipate the frequency and occurrence of meteorites and other objects in space. C To map flight plans that avoid solar flare-ups and solar winds. D To predict possible emergencies astronauts may encounter during space travels.
I'm not too sure what the answer is....
Explanation:
the warmclimate meant vast plant growth
Bluegill fish reproduce when males fertilize eggs laid by female fish is an example of which?
(1 point)
A.
Asexual reproduction
B.
Sexual reproduction
Explanation:
Reproduction in Fishes. Nearly all fish reproduce by sexual reproduction - the fusion of sperm produced from testes and eggs produced from ovaries. ... Fertilization is external in most fish species. Large quantities of eggs and sperm are simultaneously released into the water by females and males.
Complete the following complimentary DNA sequences and be sure to label the primes on the
strand as well.
3' TTTAACGGC 5'
3' GGCTATCAT 5'
5' GGCTTATCG 3'
what did Miescher contribute to the discovery of DNA? When was this discovery made?
Answer:
Explanation:
In 1869, Friedrich Miescher isolated "nuclein," DNA with associated proteins, from cell nuclei. He was the first to identify DNA as a distinct molecule. Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA.
. In summary, elephants are a keystone species. Based on your knowledge of this term, explain in your own words why it is important to the ecology and ecosystems of Africa to save the elephant populations
Based on your knowledge of this term, the importance to the ecology and ecosystems of Africa to save the elephant populations is that It will save the economy if they can get them to a stable rate.
What is ecosystem?An ecosystem have each as well as every organism and the relation between the physical environment by which they must interact. The function of the ecosystem has to satisfy the need of the humans by supplying them services as well as goods from the nature.
Ecosystem has been the branch of the science which has deals with the study of the relationship between the living organisms and the natural phenomena. Ecosystem has the system in which the both living as well as nonliving organisms are present in the particular location.
There has been various types of the ecosystem such as the Grassland ecosystem, Tundra ecosystem, Desert ecosystem, Forest ecosystem and many more type of ecosystem is present in the environment.
Therefore, Based on your knowledge of this term, the importance to the ecology and ecosystems of Africa to save the elephant populations is that It will save the economy if they can get them to a stable rate.
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Large geographic region characterized by a distinct climate and mix of species
PLEASE HELP ME I ONLY HAVE A FEW MORE QUESTIONS LEFT!!!
Answer:
1.)ribosome
2.)amino acid
3.)tRNA
4.)anticodon
5.)Codon
Explanation:
How can a bacterium ensure that there is always a concentration gradient that will drive passive transport of food molecules into its cell?
Answer:
There are two major ways that molecules can be moved across a membrane, and ... is trying to be evenly distributed everywhere, like dropping food coloring in water. ... These channels are almost always specific for either a certain molecule or a ... When a molecule moves down its concentration gradient is it participating.
When a solute particle from the region of high concentration travels towards the region containing the lower solute particle is called passive transport. It is transported easily without spending energy.
Bacteria ensures that the food molecule from the surrounding will transport through the passive transport system by the concentration gradient as molecules can get in the cell by two processes.
Concentration gradient allows the movement of food from the region of high concentration towards the region of low concentration that is in the bacterial cells.
Bacterial membrane permits the movement of food molecules across its membrane easily.
Therefore food is transported to the bacteria through passive transport.
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Which one of the following lacks in prokaryotic cell
(a) Cytoplasm (b) Cell membrane (c) Chromosomes (d) Membrane bound nucleus
Answer:
Membrane bound nucleus
Explanation:
4. A woman pushes a stroller with a force of 8.2 N and performs 28.7 J of work on the stroller. Over what distance was the
Force applied?
Answer:
3.5m
Explanation:
Given parameters:
Force applied = 8.2N
Work done = 28.7J
Unknown:
Distance through which the force was applied = ?
Solution:
Work done is the force applied on body to move it through a particular distance.
Work done = Force x distance
Now insert the parameters and solve;
28.7 = 8.2 x distance
distance = 3.5m
Water does not contain carbohydrates, fats, or proteins which are essential components of food. Then why do we drink water?
Answer:
Water is a universal solvent, and is used in biochemical reactions that take place in the human body.
With relative dating, the age of the fossil is determined by __________.
a
distinguishing between the density of the fossil and size.
b
whether it is a plant or animal fossil.
c
comparing fossil placement with that of fossils in other surrounding layers of rock.
d
comparing the fossil with other fossils around the world.
Carbon, nitrogen, and phosphorus are examples of nutrients that organisms need to stay alive. Nitrogen can be the Choose... in an ecosystem when its available forms are in short supply.
Answer:
Nitrogen is present in the soil in the form of ammonium and nitrates.
Explanation:
Nitrogen present in large amount in the atmosphere about 78 % by volumes but in an ecosystem such as land and water its available forms are in short supply because very less amount of nitrogen is produced due to the process of decomposition and some quantity of nitrogen comes from the atmosphere with the rainfall and mixes with soil and present in the soil in the form of ammonium and nitrates.
The blue-print of life. Type of Nucleic acid that controls all cellular activity.
A.
mRNA
B.
rRNA
C.
DNA
D.
tRNA
Help ASAP please! Which fuels are derived from organic matter?
Energy sources from the ocean that are derived from once-living organic matter include ________ and hydrocarbons.
The answer is a fill in the blank.
Answer:Fossil Fuels
Explanation:
Answer:
Biofuels
Explanation:
I just took the test on plato and it was correct :)
A covalent bond is formed when atoms share valence electrons. Which group of elements form covalent bonds?
You notice that a group of students went on a hiking trip to Cockscomb basin. They are asked to climb a hill, by the time they reach the top of the hill some of them are almost out of breath, while others don't even make it to the top of the hill. Only a few seem not to be affected much by the climb. Plan and design an experiment in which you offer a possible explanation for the differences in breathing rate.
Answer:
It depends on the stamina of the individual.
Explanation:
The possible explanation for the differences in breathing rate is related to the daily activities of the individuals. For example, if the daily activities of the people are hard so it has big stamina and experience no difficulty in the climbing of a hill while those people who has little hard daily activities have low stamina and their breathing rates increases while climbing a hill. Where as those people who perform no daily activities have no stamina and will be unable to climb on the hill.
explain how ATP can be compared to a rechargeable battery.
Explanation:
when it's fully charged it's a ATP and when it's runs down it's ADP
and there are times when the cells need more energy and splits off another phosphate so it goes from ADP adenoside di-phosphate, to AMP, adenosine mono-phosphate
and there you have it
What kind of remote viewing device shows weather observers movements of fronts across large geographic areas?
Answer:
weather satellites
Explanation:
The weather satellites show which directions weather fronts are moving, what they look like from space and how much water content is in the atmosphere.
Weather satellites show where weather fronts are moving, what they look like from space, and how much water is in the atmosphere.
What are weather satellites?A weather satellite, also known as a meteorological satellite, is a type of Earth monitoring satellite that is predominantly used to monitor the Earth's weather and climate.
Satellites can be polar orbiting (covering the entire Earth asynchronously) or geostationary (covering the entire Earth synchronously) (hovering over the same spot on the equator).
Heat energy in the infrared spectrum is detected by the weather satellite (infrared energy is invisible to human eye). The satellite image displays objects based on their temperature (whether they are clouds, water, or land surfaces).
Observing the Earth from space with environmental satellites is one of the most important tools for forecasting weather, analyzing climate, and monitoring hazards around the world.
Weather satellites show the movement of weather fronts, what they look like from space, and how much water is in the atmosphere.
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Part of the sun or moon is visible
A.corona
B.partial eclipse
Plz in need the answer ASAP!!
Answer:
B. Partial Eclipse
Explanation:
Disadvantages of asexual reproduction are _____.
Answer:
The first one in the image :)
Explanation:
If its asexual then, only the same species will reproduce therefore making it reproduce only one species.
Give a reason why the permanent tissue does not grow
Answer:
they are plant cells thst have comppleted their growth and do not divide
Explanation:
there is no meristemic growth
Unlike meristems, permanent tissue is made of differentiated cells that have lost their ability to divide.
PLS HELP ME I WILL GIVE BRAINLIEST
I believe that a disease that destroys half of the population would be more difficult to survive than the disease that targets organisms with similar traits because with sexual reproduction, there will be differences in genetics. If the population reproduced asexually, then that disease would be more effective.
(Sorry if answer is wrong)
Any relationship in which two species live closely together and at least one of the species benefits
adaptation
competition
predation
symbiosis
Answer:
Symbiosis
both species benefit in this symbiotic relationship
pleaseee help me answer this question!!
Answer:
its b
Explanation:
Provide at least three reasons why friction is needed.
Answer:
Although you normally hear about trying to reduce or eliminate friction, it actually has some important uses.
Since friction is a resistance force that slows down or prevents motion, it is necessary in many applications where you might want to hold items or do things and prevent slipping or sliding. In those cases, there is an advantage of having friction.
Quite often uses of frction can be seen from how things would be without friction. Without friction, you would not be able to walk, drive a car, or hold objects. Pens and pencils would not work.
Explanation:
Answer:
Friction allows people and objects to move. It provides traction for an object to start moving or change direction. It can also give people a better grip on objects. Finally, friction keeps objects in place when they are set down.
Explanation:
Sample Response
True or False:
Shearing can cause a rock to break and slip apart
Answer:
True
Step-by-step explanation:
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