Answer:
1. separation can be done with help of magnetic bar and filtration.
2. the next step will be testing the hypothesis.
Explanation:
1. Separation of iron pellets from sand, and salt first
Use a magnet
Due to magnetic force iron pallets will attach with it and separation will occur from sand and salt.
After separation of iron pallets, add water to mixture of sand and salt and heat until salt get dissolved then filter the salt water.
This will help in separating all three components of mixture to separate.
2. Bacteria growth
Hypothesis must be tested-
In this case a hypothesis and conclusion is represented. Conclusion is provided that in presence of sunlight growth of bacteria is faster. So the hypothesis must be verified by scientific experiment to be a valid theory by measuring or monitoring growth in presence of sunlight.
What is the role of the pancreas
Answer:
It converts food you consume into body fuel for our cells.
Answer:
It produces digestive enzymes
Explanation:
Just took the quiz
how do plant get nutrients
Answer:
Processes. Plants take up essential elements from the soil through their roots and from the air through their leaves. Nutrient uptake in the soil is achieved by cation exchange, where in root hairs pump hydrogen ions (H+) into the soil through proton pumps
hope i helped !!
Answer:
water, sun, soil
Explanation:
Plants absorb nutrients and water through their roots, but photosynthesis occurs in the leaves. So, plants need to get fluids and nutrients from the ground up through their stems to their parts that are above ground level.
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While doing research on deep-sea vents, you discover a very simple new life form. After some initial analysis, you find that this life form contains small fragments of DNA, small complementary RNA fragments, and proteins. Fortuitously, you collected two strains, one that is purple and one that is yellow. You wish to discover which of those three molecules could be the genetic material. You heat-kill some of the purple life form and subject three different homogenized samples to different enzymes: DNase, RNase, or protease. Which treated sample(s) will transform yellow into purple IF RNA is the genetic material
Answer:
The one treated with DNase and protease
Explanation:
The samples that will transform yellow into purple if RNA is the genetic material are the ones treated with DNase and protease respectively.
The treatment of the heat-killed sample of the purple life with DNase will ensure that the DNA in the sample becomes degraded while treatment with protease will ensure that protein is degraded, leaving only the RNA. Thus, the RNA can be taken up by the yellow life form and become transformed into purple if indeed RNA is the genetic material.
The sample treated with RNase cannot transform the yellow life into purple because the RNase catalyzes the degradation of RNA into smaller components.
what is the function of the pancreas
Explanation:
the function of the pancreas that it secretes enzymes that work in tandem with bile from the liver and gallbladder to help breakdown substances for proper digestion and absorption.
Answer:
Releases insulin.
Explanation:
All 113 baby mice in an experiment are Rr, the parents are probably (do a Punnett square to be sure)
a
RR x RR
b
RR x rr
c
Rr x Rr
Answer:
The correct answer is option B.
Explanation:
If am individual cross between two true breed mice the probability of offspring with heterozygous condition is 100 percent in such cross. True breed is an individual organism with homozygous for the particular character either dominant or recessive.
So, if mice with RR (purebred or homozygous dominant) bred with mice with rr (homozygous recessive), all the offspring will be heterozygous in genotype which is Rr.
Thus, the correct answer is : option B. (Punnet square is attached)
Answer:
B
Explanation:
Colonial protists have been hypothesized to be the precursors to multicellular organisms. This hypothesis suggests that the individual unicellular members of the colony, which are initially identical, can begin to take on different functions. Then. the colony can begin to evolve into a multicellular organism. True or False
Answer:
True.
Explanation:
Protists are group of eukaryotes that are unicellular or microscopic and some times multicellular. They can live in colonies and live individually.
Some protist live in large groups called colony.
Colonial protists form larger groups of multicellular organisms. The individuals work together as large groups and perform functions to benefit each other.
most of the colonial protist are filter feeders that feed on suspended particles. Colonies enhance feeding efficiency. In choanoflagellates, coloniest has led to the evolution of metazoans
what is the job of the stomach, large intenstine, small intestine 60 points!!
Answer:
Stomach - The stomach is a hollow organ, or "container," that holds food while it is being mixed with stomach enzymes.
Large Intestine - The large intestine absorbs water and electrolytes, and produces and absorbs vitamins. It forms and propells feces toward the rectum for elimination.
Small Intestine - The small intestine breaks down food coming from the stomach and absorbs the nutrients from the food.
Hamilton’s rule states that:
a. altruism evolves only among nonkin.
b. selfish genes swamp altruistic genes.
c. altruistic behavior is favored if the cost to the actor is less than the benefit to the recipient, devalued by the degree of relatedness.
d. altruistic behavior is favored if the benefits to the actor are greater than the costs to the recipients, devalued by their degree of relatedness.
Answer:
The correct answer is option D.
Explanation:
Hamilton rules state that any trait that helps in benefiting others, B, is multiplied by genetic relatedness, R, which is greater than cot to self, C, it is favored by the process of natural selection.
As indicated by Hamilton's rule, the kin selection makes qualities increment in recurrence when the hereditary relatedness of a beneficiary to an actor multiplied by the advantage to the beneficiary is more noteworthy than the regenerative expense to the actor.
Thus, the correct answer is option D.
The inheritance of the petite phenotype in Saccharomyces cerevisiae is complicated by an interaction of mitochondrial and nuclear genes. Which of the following is a false statement about petites in S. cerevisiae?
A) Segregational petites are characterized by mutations in the nuclear genome.
B) Suppressive petites are characterized by mitochondria lacking most of its DNA.
C) Neutral petites, when crossed to wild type, yield wild-type mitochondrial function.
D) The three categories of petites are segregational, neutral, and suppressive.
E) Both nuclear and cytoplasmic (mitochondrial) genes contribute to the petite phenotype in some cases.
Answer:
Option B
Explanation:
The three categories of petites are segregational, neutral, and suppressive and both nuclear and cytoplasmic (mitochondrial) genes contribute to the petite phenotype in some cases. Suppressive petites are characterized by perfoming crosses between petite and wild-type and discovering that all offspring are petite, this exhibit a "dominant" behavior which suppresses wild-type mitochondrial function and not a lack of mitochondrial function.
Consider a simplified metabolic model to describe nitrogen metabolism in the body. Nitrogen is ingested in the food (F), a fraction of which is actually absorbed (A), the remainder being lost in the feces (W). The absorbed nitrogen is taken up by the muscle to make protein. At small fraction of the stored muscle protein undergoes degradation and the liberated nitrogen (L) is released from the muscle. Of the liberated nitrogen, a fraction is recycled back to the muscle (R), while the rest is lost to excretion (E) in the urine
The given question is incomplete, the complete question is:
Consider a simplified metabolic model to describe nitrogen metabolism in the body. Nitrogen is ingested in the food (F), a fraction of which is actually absorbed (A), the remainder being lost in the feces (W). The absorbed nitrogen is taken up by the muscle to make protein. At small fraction of the stored muscle protein undergoes degradation and the liberated nitrogen (L) is released from the muscle. Of the liberated nitrogen, a fraction is recycled back to the muscle (R), while the rest is lost to excretion (E) in the urine. If the nitrogen ingested in food is 100 g/day, but only 80% of the food is actually absorbed, while the rest goes to waste, what is the amount of nitrogen lost by excretion? Assume steady-state. Of the nitrogen liberated from muscle, 90% is excreted, while the rest is recycled, what fraction of the nitrogen entering the muscle is from the absorbed food? (In other words, what is the ratio A/(A+R)). Again, assume steady-state
Answer:
The amount of nitrogen lost in the process is 20 grams in a day and the fraction of nitrogen entering the muscle is 0.909.
Explanation:
Based on the given question, the amount of nitrogen absorbed is 80 percent of 100 grams, that is,
100*(80/100) = 80 grams in a day.
The concentration of nitrogen lost in the process is,
Nitrogen ingested-nitrogen absorbed = 100-80 = 20 grams in a day.
Let us assume that all the ingested nitrogen is liberated from the muscle. Therefore, 80 grams of nitrogen is liberated. If 90 percent of the nitrogen liberated from the muscle get excreted, then the value of excreted nitrogen will be,
90% of 80 grams = 90/100*80 = 72 grams
Now the nitrogen recycled will be,
Liberated nitrogen - excreted nitrogen = 80-72 = 8 grams
From the absorbed food, the fraction of the nitrogen entering the muscle will be,
80/(80+8) = 80/88 = 0.909.
In what season(s) does the tilt not really affect temperature?
Answer:
Australia
Explanation:
they got wild fires to keep them warm
Which of these molecules does not enter the cellular respiration
pathway?
O glycerol
O fatty acids
amino acids
O glucose
O all of these
Answer:
fatty acid
Explanation:
it has double bonding of carboxylic acid
Examination of a sandstone outcrop reveals an abundance of feldspar and quartz grains. Could this weathered material have come from a nearby basaltic lava flow or a granite outcrop up the road?
The weathered material of a sandstone outcrop revealing an abundance of feldspar and quartz grains would have come from a granite outcrop up the road rather than a nearby basaltic lava flow.
Feldspar is a common mineral found in granite, whereas it is less abundant or absent in basaltic lava flows. Granite is composed primarily of feldspar along with quartz and other minerals. So, the presence of an abundance of feldspar grains suggests a connection to granite rather than basalt.
Quartz is present in both granite and basalt, but it is more commonly associated with granite. Quartz is one of the major constituents of granite, whereas it is generally less abundant in basaltic lava flows. Therefore, the presence of quartz grains does not necessarily differentiate between the two sources but aligns more with the possibility of granite as the origin.
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One element found in all living and dead organisms is ______.
Answer:
hydrozen............
......
i think!b..
A scientist adds heat to each of the following substances. Which will probably absorb the most heat before its temperature changes significantly? (2 points)
the force that drives fluxes of uncharged particles is :
a. heat
b. the chemical potential (μ)
c. dμ / dx
d. dμ / dt
Answer:
c. dμ / dx
I'm not sure but this all I can give you
Species of bacteria can evolve more quickly than
species of mammals because bacteria have
Answer:
540MIL0IAER
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Explanation:
F
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Answer:
Bacteria have smaller populations, grow faster, and also share more genes compared to mammals.
Explanation:
Because bacteria reproduce quicker and are also in smaller populations, they can evolve quicker because more genes are shared which can be helpful. This is due to natural selection, which will affect bacteria more than mammals because their small populations will make natural selection more significant to be harmed by mutations and allow them to evolve.
what is is a specific version of a gene on a homologous chromosome that has a corresponding version of a similar gene on a homologous chromosome. For example, hair color gene (ie. red from mom) will be on one homologous chromosome and a possibly different version of hair color gene (ie. black from dad) will be on the other corresponding homologous chromosome.
Answer:
This statement is partially true.
Explanation:
There are many phenotypic features that display a quantitative mode of inheritance and exhibit a continuous range of variation. Hair color is controlled by different genes that work together to express this trait. In consequence, this trait has a polygenic mode of inheritance, where a particular phenotype depends on both additive and dominance genetic effects. The most important gene associated with the hair color is Melanocortin 1 Receptor (MC1R), which is involved in the biosynthesis pathway that controls the synthesis of melanin.
Which statement best explains why fermentation occurs in mammals? It enables mammals to generate additional ATPATP in an oxygen‑rich environment. It breaks down lactic acid to generate a small amount of ATPATP under anaerobic conditions. It generates ethanol, which can be used as an alternative source of energy. It produces an acid that maintains blood pH within a narrow range. It allows glycolysis to continue under anaerobic conditions by replenishing NAD+NAD+ .
Answer:
The last option.
Explanation:
Fermentation/ Anaerobic respiration is important to supply ATP in the absence of oxygen.
In the presence of oxygen, glycolysis, Kreb's cycle and oxidative phosphorylation happen to provide about 32 ATP molecules. In its absence, only glycolysis can take place because it's the only step that doesnt need oxygen, to give a net supply of 2 ATP.
Even though glycolysis doesn't need oxygen, it needs NAD, and if the reduced NAD doesn't lose its hydrogens via oxidative phosphorylation, pyruvate (the end product of glycolysis) becomes the recipient of the hydrogen.
Pyruvate gets reduced to lactate.
The correct answer as to which best explains why fermentation occurs in mammals would be that it breaks down lactic acid to generate a small amount of ATP under anaerobic condition.
Aerobic respiration takes place in 3 steps:
Glycolysis: during which glucose is converted into pyruvate molecules with 2 ATP and 2NADH molecules produced.Citric acid cycle: during which pyruvate molecules from glycolysis are converted to CO2 with ATP, NADH, and FADH2 generatedElectron transport chain: during which the NADH and FADH2 produced in citric acid cycle are used to generate ATP.When oxygen becomes inadequate during rigorous activities in human cells, pyruvate molecules cannot proceed to the citric acid cycle due to lack of oxygen. Instead, the pyruvate molecules are converted to lactic acid through fermentation to generate 2 molecules of ATP.
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who first recognized the cell as the universal unit of life
Answer: Virchow van Leeuwenhoek
Explanation:
Both vegetable oil and butter are made up of fats.
Why is butter a solid at room temperature, while vegetable oil is a liquid?
A)Butter is a saturated fat and vegetable oil is an unsaturated fat.
В)
Butter is a polar molecule and vegetable oil is a nonpolar molecule.
C) Butter is an unsaturated fat and vegetable oil is a saturated fat.
D) Butter is a nonpolar molecule and vegetable oil is a polar molecule.
Answer:
A
Explanation:
Butter, as good as it is, is not exactly good for us. Butter is an animal fat, or a saturated fat. This means that at room temperature these fats will remain solid. There is some science behind it and ill say this quickly, it has to do with the carbon atoms being packed with hydrogen atoms. This allows them to intertwine and be solid. The Vegetable Oil being unsaturated, a plant fat, is good for us! These are missing some of the atoms needed to make them stand up straight and be solid. So these are always liquid at room temperature! :)
We have that for the Question "Both vegetable oil and butter are made up of fats. Why is butter a solid at room temperature, while vegetable oil is a liquid?"
Answer:
Option A is the correct answer(Butter is a saturated fat and vegetable oil is an unsaturated fat)
Explanation:
Butter contains more saturated fat., vegetable oil contains more unsaturated fat.
Melting point of Saturated fat less than melting point of Unsaturated fat
Intermolecular interactions in saturated fats greater than Intermolecular interactions in Unsaturated fats
Saturated molecules are so close and forms a solid. UnSaturated molecules are not so close and forms a liquid at room temperature
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Victoria pushes on a wall in front of her with a force of 25 N while she is
standing on roller skates. Which of the following is true?
A. A force less than 25 N pushes back on Victoria.
B. A force greater than 25 N pushes back on Victoria.
C. No force pushes back on Victoria because the wall doesn't move.
D. A force of 25 N pushes back on Victoria.
US
which structure is found in the cytoplasm of a prokaryotic cell but is not found in the cytoplasm of a eukaryotic cell
Answer: DNA
is found in the cytoplasm of a prokaryotic cell. Not found in the cytoplasm of a eukaryotic cell.
Which types of mutation are most damaging to an organism?
a) Substitution & Deletion
b) Deletion & Insertion
c) Insertion & Substitution
[tex]answer \\ = deletion \: and \: insertion \\ explanation \\ insertion \: and \: deletion \: results \: in \: a \: \\ frame \: shift \: that \: changes \: the \: \\ reading \: of \: subsequent \: codons \: and \: \\ therefore \: alters \: the \: entire \: amino \: \\ acid \: sequence \: that \: follows \: the \: \\ mutation ,insertion \: and \: deletions \: \\ are \: usually \: more \: harmful \: than \\ a \: substitution \: in \: which \: a \: single \\ amino \: acid \: is \: altered. \\ hope \: it \: helps[/tex]
Respiration is a process where many chemical bonds inside the body break and release energy. This energy is used to perform various activities
such as moving muscles. Explain the energy transformation in this process.
ОА
Chemical energy from broken bonds is transformed into mechanical energy for muscles.
ОВ.
Mechanical energy from broken bonds is transformed into chemical energy for muscles.
OC. Mechanical energy from broken bonds is transformed into electrical energy for muscles.
OD Heat energy from broken bonds is transformed into electrical energy for muscles.
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Answer:
OA
Explanation:
Chemical energy refers to the energy that is released with reactions involving chemicals. Cellular respiration takes glucose(a five carbon sugar) and breaks it down using glycolysis, then makes ATP(adenisine-triphosphate)(an essential chemical to the energy of life) using the krebs cycle and the electron transport train. This is all to get a surplus ATP, which is a useable CHEMICAL ENERGY source. This energy can be diverted to any system in the body, including the muscular system. Then, the muscles are used MECHANICALLY(look at the types of muscle levers in anatomy) to acheive work, thanks to the CHEMICAL ENERGY produced in cellular respiration. Thus, the answer in OA.
. What was Sharon’s experience with the experimental drug?
a) she suffered severe side effects b) she had few side effects c) it made her very sick
Answer:
imagine being on brainly
Explanation:
Choose the true statement. Receptor tyrosine kinases undergo autophosphorylation. G proteins phosphorylate receptor tyrosine kinases. Receptor tyrosine kinases include seven transmembrane segments. Active receptor tyrosine kinases are monomeric proteins.
Answer:
Receptor tyrosine kinases undergo autophosphorylation.
Explanation:
The receptor tyrosine kinases (RTKs) are proteins that undergo dimerization and autophosphorylation after binding with their corresponding ligands, thereby triggering downstream molecular signaling cascades. The RTKs bind with high specificity to ligands including growth factors, hormones and cytokines. In human cells, there are 58 types of RTKs proteins that function to regulate developmental pathways, and their dysfunctions have been associated with cancer progression.
Describe the type of attitude that would help of attitude that would help to make a good scientist?
Answer:
My answer to you is that the positive willing to do tests and experiments over and being okay with being wrong if you are.
What happens during G2 phase?
Answer:
Gap 2 (G2): During the gap between DNA synthesis and mitosis, the cell will continue to grow and produce new proteins.
Answer provided by CELLS Alive
Which statement describes a feature of equal are projection?
Option C
Latitude lines meet at the poles.
Explanation:
Several equivalent projections were developed in an attempt to minimize the distortion of countries and continents of planet Earth,keeping the area constant.
hope it helps
Answer:
c
Explanation:
i did it already
