Answer:
It must be repeated several times
Explanation:
Which are scentific questions that can be asked about a collection of diffrent ochid types?
Answer:
Do different colors attract different pollinators.
Explanation:
What type of reproduction involves one parent making identical copies of themselves?
A. Asexual
B. Sexual
C. Meiosis
D. Selective Breeding
Photosynthesis is undergone by plants to produce a usable food source. Which of
the following organelles is needed for photosynthesis to take place?
Nucleus
Chloroplast
Ribosomes
Mitochondria
Answer:
Chloroplast
Explanation:
Chloroplasts are organelles found in green plants. They are the sites of photosynthesis. Chloroplasts contain chlorophyll, a photosynthetic pigment that traps light energy. This energy is used to power a series of reactions that convert water and carbon dioxide into sugars.
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Answer:Freehahhaahahhagagagsgsgsgsgsg
Explanation:
Freehahhaahahhagagagsgsgsgsgsg
Answer: Thank You for the Free Points, Brother! :)
Explanation: Free yayayyayahah
Which part of scientific design occurs when an experiment is conducted by more than one scientist to determine the validity of results?
Replication
Research
Trials
Variables
The answer is: Trials.
Trials part of scientific design occurs when an experiment is conducted by more than one scientist to determine the validity of results. Thus the correct option is C.
What is trail?Researchers gather information, group volunteers according to broad characteristics, and compare changes over time.
Repeated trials are when researchers do a measurement multiple times - at least three, commonly five, but the more the better. When they measure something once, the chance that the number he get is accurate is much lower. But if researcher measure it several times, then he can take an average of those numbers and get a result that is much closer to the truth.
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Answer:
D
Explanation:
Calculate the final concentration of BSA in the problems below using the formula
C1*V1 = C2*V2,
where C1 and V1 are the concentration and volume of the starting solution, and C2 and V2 are the concentration and volume of the final diluted solution. Include proper units and show your work for full credit.
A. 300 ul of 5 mg/ml BSA is added to 700 ul TBS
B. 50 ul of 1.5 mg/ml BSA is mixed with 450 ul H2O and 500 ul Bradford Reagent
C. 10 ul of 1 mg/ml BSA is mixed with 990 ul TBS.
D. 10 ul of 0.1 mg/ml BSA is mixed with 990 ul TBS.
Answer:
A. [tex]C_2=1.5\frac{mg}{mL}[/tex]
B. [tex]C_2=0.075\frac{mg}{mL}[/tex]
C. [tex]C_2=0.01\frac{mg}{mL}[/tex]
D. [tex]C_2=0.001\frac{mg}{mL}[/tex]
Explanation:
Hello.
In this case, we must compute the final concentration in all the cases so we solve for it in the given equation:
[tex]C_2=\frac{C_1V_1}{V_2}[/tex]
Thus, we proceed as follows:
A. Here, the final diluted solution includes the 300 μL of the 5 mg/ml-BSA and the 700 μL of TBS.
[tex]C_2=\frac{300\mu L*5\frac{mg}{mL} }{(300+700)\mu L}\\\\C_2=1.5\frac{mg}{mL}[/tex]
B. Here, the final diluted solution includes the 50 μL of the 1.5 mg/ml-BSA, the 450 μL of water and the 500 μL of TBS.
[tex]C_2=\frac{50\mu L*1.5\frac{mg}{mL} }{(50+450+500)\mu L}\\\\C_2=0.075\frac{mg}{mL}[/tex]
C. Here, the final diluted solution includes the 10 μL of the 1 mg/ml-BSA and the 990 μL of TBS.
[tex]C_2=\frac{10\mu L*1\frac{mg}{mL} }{(10+990)\mu L}\\\\C_2=0.01\frac{mg}{mL}[/tex]
D. Here, the final diluted solution includes the 10 μL of the 0.1 mg/ml-BSA and the 990 μL of TBS.
[tex]C_2=\frac{10\mu L*0.1\frac{mg}{mL} }{(10+990)\mu L}\\\\C_2=0.001\frac{mg}{mL}[/tex]
Best regards.
You conduct a voltage clamp experiment in which you hold the presynaptic terminal of a glutamatergic neuron (a neuron that releases glutamate) at 0 mV. When you treat the terminal with TTX, an inward current is recorded. Which ion and ion channels are responsible for the current you observe? Group of answer choices Calcium; ligand-gated non-specific cation channels Sodium; ligand-gated non-specific cation channels Calcium; voltage-gated calcium channels Sodium; voltage-gated sodium channels Potassium; voltage-gated potassium channels
Answer:
Calcium; voltage-gated calcium channels
Explanation:
Voltage-dependent calcium channels represent a group of voltage-gated ion channels and they are recognized to be primary mediators of calcium entry induced by depolarization. These channels are localized in the membrane of excitable cells such as, for example, neuron cells. The potential difference across the membrane of neuron cells without physiological activity is named resting membrane potential. When there is no action potential, voltage-dependent calcium channels are normally closed.
Select the correct answer. Which alignment of the Sun, Moon, and Earth causes a lunar eclipse?
Answer:
A; The sun, then earth, and lastly
the moon
Explanation:
Answer:
A
Explanation:
the weak stem of the bean plant that spirals around a support is colled
...........................................
Answer:
Thus it is called a creeper. Bean stalk, gourd plants and grape vines have weak stem but readily climbs up a neighbouring support or a tree. These plants are called climbers.
Explanation:
Below is Bohr model of an Atom. Scientists have claimed that the nucleus
of the atom is positively charged. In 3 - 5 sentences, describe a test (or an
experiment) to prove that this claim is true.
Answer:
Bohr claimed that the nucleus is positively charged . Though nucleus have protons and neutrons. Neutrons are neutral particles as they have no charge but protons are positively charged .
Explain how two organisms can have the same
phenotype but different genotypes. Give an example.
Answer:
2 organisms can have the same physical traits but no matter what, every single living creature has different DNA. Like how twins can look the same but their DNA won't be exact.
Explanation:
name 3 non examples of bacteria.
Answer:
Fungi,plant cells and red blood cells
Explanation:
Bacteria are prokaryotic cell and so they lack a nucleus and therir genetic material lies naked in their cytoplasm. Ther are very small compared to eukaryotic cells such as plant cells, red blood cells and stem cells. They're very large compared to viruses.
what is not a prevention method for the milkweed bug?
Answer:
remove leaf litter and spent stallis in the fall
Explanation:
Help!?! With this osmosis question
Answer:
( c. ) to an area of lower concentration between sugar molecules in the bottom of a beaker.
Explanation:
"Osmosis is a process which solvent such as water in most of the cases, moves from its higher concentration to its lower concentration when two concentrations are separated by a semipermeable membrane or differentially permeable membrane. " - Naqada
"As a result of osmosis, the concentration on both sides of a membrane becomes equal. In the option c) of the question sugar molecules in the beaker is not separated by a semipermeable membrane thus osmosis will not occur." - Naqada
Sorry if I am wrong and correct me, hope this helps. Have an amazing day.
Answer:
Translate the below
Explanation:
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tu mama se baña con chanclas
Biological molecules can be broken down by ______
reactions, where a molecule of _______
between the monomers.
breaks the bond
1. water
2. polymers
3. oxygen
4. ethanol
5. catalases
6. hydrogen
7. nitrogen
8. hydrolysis
Answer:
Biological molecules can be broken down by 8. hydrolysis reactions where a molecule of 1. water between the monomers breaks the bond.
Hope this helps girly!!
True/False
Indicate whether the statement is true or fulse.
1. A career in food science limits the individual to work in a lab as a scientist.
2. An agriscience technician career requires a college degree.
3. American agriculture is the world's largest commercial industry.
4. About 20 percent of the careers in agriscience require college degrees.
5. Large farm operations can produce more food than one farmer.
6. Agriscience jobs occur only outdoors.
7. Production agriculture involves producing literature about growing food crops.
8. People who haul agricultural commodities from their production sources work in the segment called
agricultural processing
9. U.S. consumers spend about 15 percent of their income on food.
10. Landscape designers work in the segment known as forestry.
Answer:
true
Explanation:
sorry if i am wrong
⦁ If a carbohydrate has 6 carbon, it will have _________ oxygen and _________ hydrogen.
Answer:
6:12:6
Explanation:
the ratio carbs is 1:2:1, carbon being first, hydrogen second and then oxygen last
Our model includes the fact that as whales dive deep and then come back
to the ocean surface the whales help phytoplankton to move to the
surface' they phytoplankton can use sunlight near the surface to do
photosynthesis.(whales need to come to the surface to breathe air, they
cannot get oxygen from water- they are mammals, not fish!). Explain why
this is important for decreasing the amount of carbon dioxide in the
atmosphere and helps slow climate change.
Answer:
They are known as primary producers of the ocean—the organisms that form the ... Like land plants, they take up carbon dioxide, make carbohydrates using light ... Because they need light, phytoplankton live near the surface, where enough ... toxins that cause can cause illness or death among humans and even whales ...
Explanation:
Which example illustrates public scientific communication?
A. A scientist collaborates with other scientists to plan an experiment.
B.A scientist sends a preview copy of a journal article to some colleagues.
C. A federal government agency holds a press conference to describe the response to and the dangers of a new virus epidemic.
D. A federal government agency publishes an article in a professional scientific journal detailing technical details of a new virus.
ANSWER :
c.A federal goverment agency hold apress conference to and the dangers of a new virus epidemic
A biology student looked through a microscope and observed an Elodea cell in a drop of water and illustrated it in diagram A. He added a 10% hypertonic salt solution to the slide. He then observed the cell and illustrated the change in diagram B. What caused the change in the appearance of the cell after the salt solution was added?
More water flowed into the cell than out of the cell.
More salt flowed into the cell than out of the cell.
Lass salt flowed into the cell than out of the cell.
More water flowed out of the cell than into the cell.
Answer:
There are no diagrams in this question, however, it can be answered.
More water flowed out of the cell than into the cell.
Explanation:
According to this question, a biology student added 10% hypertonic salt solution to an Elodea cell in a drop of water. The student illustrated the changes observed in diagrams A and B. Based on the principles of OSMOSIS, which is the movement of water from a region of lower solute concentration to a region of higher solute concentration, water will flow out of the cell.
Since the solution outside the Elodea cell has more solute solute/salt concentration, water will be move down the concentration gradient from the cell into the extracellular solution. Hence, more water flowed out of the cell than into the cell.
What do our muscles produce when undergoing anaerobic respiration?
Answer:
Explanation:
Lactic acid fermentation In this type of anaerobic respiration, glucose is split into two molecules of lactic acid to produce two ATP. It occurs in certain types of bacteria and some animal tissues, such as muscle cells. This process also produces two ATP per sugar molecule
An artificial cell is with a solution of 2% protein and placed in a solution with a 8% protein concentration. Predict what would happen to the cell after a few hours.
Answer:
water would diffuse out of the cell
Explanation:
proteins can't pass through the cell membrane, water can.
Water will diffuse in the outer part of the cell after a few hours.
What is cell?Cell is defined as the base of life as it is the structural as well as functional unit of life. Cell is made up of pre existing cells and the cell contain various cell organelles such as mitochondria, endoplasmic reticulum, ribosomes, golgi appratus, nucleus, and cytoplasm.
Basically, cell is of two type one in prokaryotic and another one is eukaryotic. The prokaryotic cell is known as pre mature cells as they do not contain cell organelles and eukaryotic cell are known as advanced and developed cells as they contain several cell organelles.
The unicellular animals are made up of single cell and all the functions carried out in a single cell like amoeba and multicellular organisms are made up of multiple cells and there is specific cell for specific functions.The prokaryotic cell is known as pre mature cells as they do not contain cell organelles and eukaryotic cell are known as advanced and developed cells as they contain several cell organelles.
Therefore,Water will diffuse in the outer part of the cell after a few hours.
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Ocean water is about 96.5% water. How many elements make up most of Earth’s ocean water? (Hint: Step 1. Recall and draw the structure of a molecule of water. Step 2. Count the number of unique elements.)
A one
B two
C three
D four
Answer:
d
Explanation:
HURRY PLEASE ITS FOR A TEST
8. Solutions that have more OH-than H+ ions are
*
acids
bases
buffers
neutral
Answer:
bases
Explanation:
A substance that contains equal numbers of H+ and OH- ions is considered neutral (pH 7). If a solution has more H+ than OH- ions, it is considered acidic and has a pH less than 7. If a solution contains more OH- ions than H+ ions, it is considered basic with a pH greater than 7.
How do humans rely on Earth's atmosphere?
In order for conduction to transfer heat from one object to another, what must be true?
Answer:
The objects should be far apart. There must be air circulation. The objects need to be touching. Solar energy is required.
Explanation:
Mark BRAINLIESt
Answer:
The objects need to be touching.
Explanation:
What roles do species play in ecosystems?
There are some species in every ecosystem that are necessary for the other species in the system to survive. The ecosystem may not be able to continue functioning without the keystone species, which could be a small plant or a large predator.
What are keystone species ?
Scientists may argue over which organisms or plants in a given ecosystem should be called a keystone species because a keystone species does not have a formal name. The idea, according to some wildlife scientists, oversimplifies the role of a single animal or plant in intricate food webs and habitats. On the other hand, referring to a specific plant or animal as a "keystone species" in an ecosystem is one way to educate the general public about how crucial one species can be to the continued existence of numerous others.There are three sorts of cornerstone species referred to by numerous researchers: mutualists, ecosystem engineers, and predatorsThe "keystone" is regarded as one of the most crucial components in any community or arrangement. An organism that contributes to the stability of the system is known as a keystone species in any kind of ecosystem, including marine ecosystems. Ecosystems would look very different without its keystone species. If their keystone species vanished, some ecosystems might not be able to adjust to changes in the environment. That could result in the ecosystem's demise or it could allow an invasive species to take control and significantly alter the ecosystem's course.To know more about keystone species check this:
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how does radiant energy become food for a plant?
Answer:
Photosynthesis. ... Photosynthesis is the transformation of radiant energy to chemical energy. Plants take in water, carbon dioxide, and sunlight and turn them into glucose and oxygen. Called photosynthesis, one of the results of this process is that carbon dioxide is removed from the air.
Explanation:
Please Mark Brainliest
Answer:
Its because of photosynthesis.
Explanation:
Hopefully this will helps you out :))
que son los radicales
Answer:
un radical es un átomo, molécula o ión que tiene un electrón de valencia no apareado. Con algunas excepciones, estos electrones desapareados hacen que los radicales sean altamente reactivos químicamente.
Explanation:
Question 4 of 10
Which two substances are needed for cellular respiration?
O A. Oxygen
O B. Sugar
O C. Water
D. Carbon dioxide
Answer:
B sugar
D. Carbon dioxide
Explanation: