Answer:
The Rf values indicate how soluble the particular pigment is in the solvent by how high the pigment moves on the paper.
Explanation:
The Rf values indicate how soluble the particular pigment is in the solvent by how high the pigment moves on the paper. Small Rf values tend to indicate larger, less soluble pigments while the highly soluble pigments have an Rf value near to one.
The process by which a semipermeable membrane allows water molecules, small molecules and ions to pass through while retaining the larger molecules is known as:_______
a) Dilution
b) Hydration
c) Solvation
d) Dialysis
e) Titration"
Answer:
The answer is Dialysis.
Explanation:
Dialysis is the process by which a semipermeable membrane allows the water molecules, small molecules and ions to pass through while retaining the larger molecules. Thus, the correct option is D.
What is Dialysis?
Dialysis is the process of separating molecules in a solution by the difference in the rates of diffusion through a semipermeable membrane. Membranes such as dialysis tubing. Dialysis is a common technique which operates on the same principle as the medical dialysis.
One of the most common application of dialysis is the removal of unwanted small molecules such as salts, reducing agents, or dyes from the larger macromolecules such as proteins, nucleic acids like DNA, or polysaccharides. Dialysis is also commonly used for the purpose of buffer exchange and for the drug binding studies.
Therefore, the correct option is D.
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During which eon did oxygen begin to build up the most in Earth’s atmosphere? a.)Phanerozoic b.)Proterozoic c.)Hadean d.)Archean
Answer:
b) Proterozoic eon
Proterozoic builds an oxygen layer in the earth's atmosphere.
What is a Proterozoic zone?The Archean Eon, the oldest of the two Precambrian periods, is older than the Proterozoic Eon. The Paleoproterozoic (2.5 billion to 1.6 billion years ago), and Mesoproterozoic (1.6 billion to 1 billion years ago).
All of the continents' recognized proterozoic rocks are significant sources of metallic ores, including iron, gold, copper, uranium, and nickel. The atmosphere and oceans underwent substantial alteration during the Proterozoic.
The fossilized remains of bacteria, blue-green algae, and the first oxygen-dependent organisms,the the Ediacarana fauna, may all be found in the Proterozoic rocks.
Therefore, Proterozoic builds an oxygen layer in the earth's atmosphere.
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Which of the following statements is correct?
a) Insulin suppresses the activity of glycogen synthase
b) Insulin mediates glucose uptake in the brain
c) "Prediabetes" is a condition characterized by an increased risk for the future development of type 2 diabetes
d) The rise in insulin concentration after meal ingestion is reduced in type 1 but not in type 2 diabetes
Answer:
C) Prediabetes is a condition characterized by an increased risk for the future development of type 2 diabetes.
Explanation:
Prediabetes is a condition where there's a higher than normal blood sugar level but not high enough to be classified as type 2 diabetes. It is most likely to progress to type 2 diabetes if there are no lifestyle changes to mitigate the risk.
This progression can be stopped if the necessary lifestyle changes such as physical exercise, eating a healthy diet, weight control etc, are implemented.
Prediabetes doesn't usually present with any signs and symptoms though one possible sign is the darkening of the skin on the neck, armpit and elbows.
When signs like frequent urination, excessive thirst and fatigue are noticed, it is most likely the onset of type 2 diabetes.
12. Endocrine gland that is located posterior to the sternum, within the mediastinum of the thoracic
cavity.
The correct answer is the thymus
Choose one of the following, and describe why they might have been interested in Charles Darwin's findings : a. A zoologist in the late 1800s b. A prizet in the late 1800s c. A paleontologist in the late 1900s
Answer:
i think its c
Explanation:
Exposing skeletal muscle fibers to ________ removes ions and ATP from the cells and disrupts the troponin-tropomyosin complex such that it can no longer block the active sites on the actin molecules.
Answer:
Glycerine/Glycerin
Explanation:
This is a colourless ,odourless syrup liquid which is sweet to taste .it is non toxic,it is also refers to as glycerol.Its medicinal uses includes anti bacteria and anti viral for wound treatments,and as a marker in liver diseases.
Chemically it contains three hydroxyl (OH) group bonded together.This structure is an adaptation for dissociation in water and also accounts for its hygroscopic nature.
When a muscle fibre is exposed to Glycerine,these cells contracts,reducing the space among the cells.Hence the fibres contraction is affected,follow by reduction in length.
Basically, during glycerine is applied to muscle cells,this substance punctures the sacolemma, creating holes.The latter aid the diffusion of ca+ and ATPs across this membrane in the muscle cells.
Generally the ca+ from the Sacroplasmic reticulum binds with the troponin,leading to the change in its shape to bind with the actin filament.Protein tropomyosin also binds with the actin filaments on different positions. Thus these proteins forms the troponin-tropomyosin complex on the filament.The proteins exposes part of the actin molecules, as the binding site for the myosin head cross bridges between the two filaments types.
Hydrolysis of ATP supplies energy for the withdrawal of the myosin head from the actin filaments and its tilts back to the filaments to ensure contraction and relaxation of muscles muscles fibres.
Now.if glycerine created holes in the sacrolemma,Ca+ ions will be reduced,ATPs molecules hydrolysis will be also be affected,therefore, troponin-tropomyosin complex can not be formed.Thus actin filaments would not be exposed,for myosin head to bind, (therefore the myosin binding site is blocked on the actin molecules)this eventually prevent muscles contractions without the nervous transmission.
An abnormal increase in the forward curvature of the lower or lumbar spine is known as __ .
Answer:
The correct answer is - Lordosis
Explanation:
Lordosis is characterized as an excessive internal bend of the spine. It varies from the spine's ordinary bends at the cervical, thoracic, and lumbar regions, which are, to some extent, either lordotic (closer to the low back) or kyphotic (close to the neck).
Certain ailment procedures can antagonistically influence the structure of the spine and lead to lordosis.
Thus, the correct answer is - Lordosis
what is 6.9 times 10 to the 7th power
Answer:
69000000
brainlest please and its acually not hard you just have to mutiply everything yk
Answer:
69000000
Explanation:
Since there are seven zeros in powers of ten notation it would be ten million
10000000 times 6.9 will give you 69000000
Which term describes an organism that has identical alleles for a trait?
Answer:
h;o;m'o;z'y'g'o'u;s; - two identical alleles
sorry, ignore the punctuation brainly wouldn't let me post the word together :/
Explanation:
Heterozygous would be two different alleles :)
What response do you expect to happen as the body tries to restore homeostasis
Answer:
Cells swell as water moves into them. Cells swell as water moves out of them. Cells shrivel as water moves out of them.
hope this answer is correct
____________activity reflects the extent to which an individual is alert,resting, sleeping, or dreaming.
Answer:
"EEG (electroencephalogram) " is the correct answer.
Explanation:
An EEG (electroencephalogram) seems to be a device that is being utilized to measure brain electrical performance. Parts of the mind have electrical stimulation that share information or interact with one another. This could be used to improve performance identify possible issues associated with this operation, monitor as well as combined total brain wave variations.So that the above would be the right answer
Which gland secretes chemicals that exert subtle effects on the sexual behavior and physiology of other people
Answer:
The Apocine glands.
Explanation:
These glands secrete sex pheromones This is the chemical substances which exhibits subtle effects on the sexual behavior and physiology of other people.
They are located at the axilla,anogenital region, at the areola and the nipple etc,The breast is a modified apocrine gland.It contains the mammary gland which secrets the best milk.Thus it is an example of apocrine gland.Basically,pheromones are has a significant reproductive effect on the opposite organism concerned.It aids mating,
Their hormonal secretions is released through the plasma membrane by budding off from the extracellular membrane,
In intramembranous ossification, the model or template on which the bone forms is Group of answer choices mesenchyme tissue elastic cartilage hyaline cartilage fibrocartilage
Answer:
Mesenchymal tissues.
Explanation:
Intramembranous ossification is process that allow the formation of bone from the fibrous membrane where bone tissues are created. It is the direct conversion of mesechymal tissues into bones. This process take place in the bone of the skull where mesenchymal tissues differentiate into cartilage and latter replaced by bones. Tye flat bones of the face, cranial bones and clavicles are formed by intramembranous osssification
Hair of the axilla can be considered what
Answer:
A. Determinate
B. Indeterminate
The answer is Determinate hair
Explanation:
Hair of the axilla which is also referred to as axillary hair is found under the arm.
A hair is referred to as being determinate if it is being replaced from time to time as a result of it getting old and wearing out.
The underarm hair is an example of the type of hair which undergoes the determinate type of growth process.
Indeterminate hair growth such as the one on the scalp continues to grow continuously and rarely wears out.
Which activity is part of managing water resources
studying water to see whether it is polites
taking a long hot bath to say warm
drinking water and using it for swimming and boating
transporting water to areas where it is needed
Answer:
The correct answer is - transporting water to areas where it is needed
Explanation:
Water Resources Management (WRM) is the way toward developing, planning, and managing water assets, as far as both water amount and quality, over all water uses.
Water resources management is a significant issue from different retrospectives, for example, improvement of water bodies for future, assurance of accessible water bodies from contamination and over exploitation.
Water management can be done through storage in dams; redirecting water from overabundance zones to shortage zones through waterways linking; falsely recharging ground water; desalinating ocean water; towing chunks of ice from the Antarctic to water shortage locales; controlling contamination and recovering dirtied water through reusing; and cloud seeding.
Thus, the correct answer is - transporting water to areas where it is needed.
enzymes ___ the activation energy threshold required to start a chemical reaction lower or raise
Answer:
lower
Explanation:
Enzymes are chemical substances or biological molecules that catalyze biological reactions by lowering the activation energy threshold required to start such reactions.
The activation refers to the minimum energy that must be conquered by the reactants in a chemical reaction in order to cross over to the product's side.
Enzymes work by lowering this energy and hence, making the crossing over to the product's side faster than normal. They are not themselves used up in reactions and can always be recovered and reused.
Correct answer: lower
what is inflammatory bowel disease please answer wrong answer will be reported also friend meeee
Answer:
Hope this helps u
Explanation:
Inflammatory bowel disease is a problem when your chronic inflammatory problems begin. Prolonged inflammation results in damage to the GI tract.
Answer:
Inflammatory bowel disease is a problem when your chronic inflammatory problems begin. Prolonged inflammation results in damage to the GI tract.
Explanation:
78. What color pigmentation is associated with pregnancy mask?
brown
blue
b. yellow
d. red
homestyler in the regulation of an organism's internal environment to maintain conditions suitable for life
The question is incomplete as the nature of question is not clear, however the correct question is as follows:
homeostasis is the regulation of an organism's internal environment to maintain conditions suitable for life. homeostasis requires....
Answer:
The correct answer is - Homeostasis requires balances between many factors in the body such as the body temperature, chemical and physical balance, pH etc
Explanation:
Homeostasis is the ability of an organism to regulate or maintain its internal environment or conditions according the condition require for survival of organism or cell.
It is the characteristic feature of living organisms and life to adapt or maintain the equilibrium of cell's chemical, physical environment.
Thus, the correct answer is - Homeostasis requires balances between many factors in the body such as the body temperature, chemical and physical balance, pH etc
the analysis and comparison of DNA to better understand relationships between species
Answer:
comparative genomics
Explanation:
Comparative genomics is a field of biological research in which the genomic features of different organisms are compared. The genomic features may include the DNA sequence, genes, gene order, regulatory sequences, and other genomic structural landmarks.
Which correctly lists three agents that loosen and carry away rock during the erosion process?
animals,heat,sedimentheat
heat, wind, plants
plants, animals, wind
sediment, heat, plants
Answer:
Plants, animals, wind
Explanation:
I used the process of elimination. Heat and sediment cannot move dirt and/or rocks
Animal and plant movement is a factor in biological weathering. For instance, a plant may grow in a gap in a rock and, as its roots spread, cause the crack to widen. Even you have the potential to weather! Thus, option C is correct.
What loosen and carry away rock during erosion process?The dirt is kept in place by plants. Some animals scrape pebbles as they eat to weather them. Other creatures alter the surface of the Earth by digging into it and shifting stuff.
The majority of the vegetation can be destroyed by an excessive number of animals, which speeds up erosion.
Earthen materials are worn away during erosion, a geological process in which they are moved by wind or water.
Therefore, Earthen materials are worn away during erosion, a geological process in which they are moved by wind or water.
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Ethnographic evidence has revealed that traditionally, Pawnee women worked wood, and among the Hidatsa, women made boats. Cases such as these suggest that:_________
Answer:
patterns of division of labor by gender are culturally general—not universal
Explanation:
Based on this information it can be said that cases such as these suggest that patterns of division of labor by gender are culturally general—not universal. Meaning that division of labor by gender would be drastically different depending on the surrounding culture, such as in this case women worked wood and made boats, yet in another culture such as American Culture, it is Men that worked such manual labor jobs.
In Type I diabetes the body cannot make ______ and in Type 2 diabetes the hormone ________ doesn't work properly.
(Choose the best option.)
1. Estrogen and insulin
2. Epinephrine and insulin
3. Insulin and glucagon
4. Insulin and insulin
Answer: 4. Insulin and insulin
Explanation:
Diabetes indicates that the level of glucose, or sugar, is very high in the blood. It occurs when the pancreas doesn't produce enough insulin or when the body doesn't use insulin properly (called insulin resistance). Insuline is a hormone that helps glucose get into the cells to give them energy, and glucose comes from the food and drinks being the main source of energy. Sometimes a person has both problems. In both cases, the result is that glucose does not enter the cells and builds up in the blood.
In type 1 diabetes, the pancreas does not produce insulin, Without insulin, too much glucose stays in the blood and over time, high blood glucose levels can cause serious problems in the heart, eyes, kidneys, nerves, gums, and teeth.
With type 2 diabetes, the most common type, the body does not make or use insulin well. There is a higher risk of type 2 diabetes if the person is older, obese, have a family history of diabetes, or don't exercise. Also, having pre-diabetes also increases that risk because people who have pre-diabetes have higher than normal blood sugar but not enough to be considered diabetic.
So, in type 1 diabetes there is an absolute lack of insulin due to the destruction of the pancreatic islets. While type 2 diabetes is a metabolic disorder characterized by hyperglycemia (high blood sugar) in the context of insulin resistance.
Hi where is the Mumbai tribe from
Which of these viral cytopathic effects is most likely to be associated with the development of cancer?
Answer:
loss of contact inhibition
Explanation:
From the different options provided the one that is associated with the development of cancer is loss of contact inhibition. Contact Inhibition is a process of arresting cell growth when the cells come in contact with each other causing them to stop proliferating when they form a monolayer. Loss of contact inhibition would allow cells to continue replicating which leads to cancer.
What's Inside a Black Hole?
explain the flow of energy in an ecosystem determines how many of each type of organism the ecosystem can sustain
Answer:
In environment, energy flow , likewise called the calorific flow, alludes to the flow or the progression of energy through an food chain, and is the focal point of study in ecological energetics. In an environment, biologists look to evaluate the overall significance of various part of species and feeding connections.
in any biological system in light of the fact that these living beings carry energy to other tropic level. A food chain can typically support close to six energy transfers before all the energy is used up.
Differentiate between first and second order consumers?
Explanation:
The difference between first and second consumer are,
The first consumer are autotrophic in nature but second consumers are heterotrophic in nature.The first consumer are mostly plants and second consumers are mostly animals.The first consumer are called producers and second consumer are called herbivores.hope it helps..
Enzymes have specific _____ that determine their function. carbohydrates starches lipids shapes
What happens to electrons when pigments in Photosystem II absorb light? They combine with oxygen and hydrogen to produce water. They are pumped across the membrane into the thylakoid. They move through an electron transport chain to Photosystem I. They become excited and break down the pigments to release ATP.
Answer:
The correct answer is They move through an electron transport chain to Photosystem I.
Explanation:
Luminous energy is trapped by a chlorophyll molecule in the Photosystem II. When the pigment molecules absorb light, electrons get in a higher energy level. These excited electrons go through the electron transport chain to an inferior energy level in the photosystem I. When the excited electrons leave photosystem II, they are replaced by new electrons that are extracted from the water molecules. As electrons go through the transport chain, their released energy is used to produce ATP molecules. Luminous energy absorbed in the photosystem I move the electrons to another electron acceptor from where they are transported again and used to produce NADPH molecules. When electrons are eliminated from Photosystem I, they are replaced by new electrons that are coming from the photosystem II through the transport chain.