Name 2 problems that can occur in a fresh water biome that can have a negative impact on Pacific NW Salmon. Describe how each of those problems could impact the salmon.
Answer:
building of dams- fish are barricaded when they try to travel in order to reproduce. No reproduction obviously leads to the extinction of the species.
factory fumes- pollute the freshwater.
Global warming- Higher temperatures are causing the water to be evaporated more quickly because of this plants in or around the source of water are dying and animals are losing their food sources.
Assignment Biological Molecules, Solutions, and Solubility
The Solubility of a Biological Molecule: Monosodium Glutamate; Sensitivity top H, Enter the pH you recorded during your experiment. Comparison of the effect of adding HCl on pH of water versus water saturated with MSG. Amount of HCl added Control: water Experimental: water saturated with MSGno HClpH = pH = 1 mL HClpH = pH = 2 mL HClpH = 3 mL HClpH = 4 mL HClpH = 5 mL HClpH = pH when change in appearance occurred. What explains the resistance of the MSG molecule to pH change, relative to the water? What feature of the MSG molecule is responsible for this?
Answer: The resistance is because MSG acts as a buffer, it accepts and donates H+ ions.
Explanation:
Monosodium glutamate (MSG) is a non-essential amino acid that acts as a water-soluble buffer, and it found in food such as meat as a sodium salt of glutamic acid.
A buffer is a solution that affects the concentration of hydrogen ions (also called hydrons) in water, because it can resist pH changes when other components are added, by increasing or decreasing the concentration of the hydrogen ions present. Remember, the pH is a measure of the acidity or alkalinity of a solution that indicates the amount of hydrogen ions present, and an acid is a substance that donate hydrogen ions in a solution, while a base is a substance that accepts hydrogen ions.
So, a buffer can neutralize small amounts of acid or base that is added, and maintain the pH relatively stable. The resistance of the MSG molecule to pH change, is because this molecule acts as a buffer and acepts the hydrogen ions when an acid is added. And it also acts as a buffer and donates hydrogen ions when a base is added. Thereby the hydrogens are not found free in the solution and are not able to change the pH.
For example, if HCl is added (a strong acid because it dissociates completely) on a solution which has MSG, there will be no big changes in the pH since the MSG acts as a buffer, accepting those hydrogen ions that the acid releases. So they will not be left in the solution and when you measure the pH, you will not detect them. However, if you add a large amount of acid, the molecule will no longer be able to accept all the hydrogens ions and you will begin to notice changes in the pH.
What is the effect of an enzyme on the energy of a chemical reaction
Answer:
it increases speed of chemical reaction
What way does air move ?Air ranges in which two pressures ?
A)Vertically ;L to H
B)Horizontally;H to L
C)Vertically;H to L
D)Horizontally;L to H
B.) horizontally; H to L
I just did the text and the obvious answer is B
A carbohydrate is an organic compound that is composed of carbon, hydrogen, and oxygen. The unique structure of carbohydrates makes them useful material for building cell walls in plants. Which of the following is a function of carbohydrates in animals?
Answer:
used to provide energy for daily activities and extra carbs are stored to be used for later purposes.
Explanation:
these carbohydrates are oxidised to release energy used for daily activities
carbs are also stored to provide energy to the body in times of hunger crisis
Which list shows the correct order of these events in the
formation of sink holes?
Falak lists the four events involved in the formation of
sinkholes.
W-Acidic rainwater dissolves the limestone bedrock.
X-Large cavities form in the bedrock.
Y - Natural holes and cracks become bigger.
Z - The ceiling collapses due to the weight of sediment.
O W, X, Y, Z
OW, Y, X, Z
OW, Z, Y, X
OW, Z, X, Y
Answer:
W, Y, X, Z
Explanation:
Answer:
W, Y, X, Z
Explanation:
Edge 2020
45. Where in the
cell would rRNA be found?
A Nucleus
B. Ribosomes
C. Golgi Apparatus
D. Cholorplast
46. What is the role of messenger RNA?
A. To bring the DNA message to the mitochondrion
B. To bring the tRNA
message to the nucleus
C. To bring the DNA message to the ribosome
D To take anino acids to the ribosome
47. An mRNA codon has the following sequence: ACU
What is the corresponding tRNA sequence called, and what would the sequence be?
A. Anticodon, UAG
B. Codon, TGA
C. TCode; TGU
D. Anticodon; UGA
Answer:
45. B. Ribosomes
46. C. To bring the DNA message to the ribosome
47. D. Anticodon; UGA
Explanation:
45. rRNA stands for ribosomal RNA. It is an important component of all ribosomes. It is non-coding RNA meaning it does not produce a protein. It is a ribozyme (an RNA with enzymatic activity) which carries out protein synthesis in ribosomes.
46. mRNA stands for messenger RNA. It is transcribed from DNA. After transcription, it goes to the ribosome where it is translated into protein.
47. tRNAs posses anticodons that are complementary to RNA codons. In RNAs, A pairs with U, and G pairs with C.
Justify how climate change has impacted the frog and salamander habitats
Answer:
Increasingly erratic rainfall patterns can lead to declines in southeastern frog and salamander populations, but protecting ponds can improve their plight.Amphibians, which rely on water for part or all of their life cycle, must adjust to often atypical weather. Some years bring heavy deluges, such as the region's notorious hurricanes, and others bring the transformations that come with drought. Amphibians around the world seem to be experiencing the worst declines documented among vertebrates. While habitat loss is the number one reason for population declines, research suggests that disease, invasive species, contaminants and perhaps other factors contribute to declines in protected areas.
And then there's climate change, another stressor for amphibians to contend with. Climate change projections indicate that rainfall will increasingly come in pulses, with greater deluges and longer periods of drought. Scientists have long suspected that climate change is an important factor in amphibian declines, and resource managers are asking whether conservation measures might help species persist or adapt in a changing climate. Three recent U.S. Geological Survey studies offer some insight into the issue.
Explanation:
In cats, the Dense pigment gene, D/d, codes for melanophilin, a protein involved in the transportation and deposition of pigment into a growing hair. A separate gene, M/m, is responsible for the production of the pigment, with M_ producing black pigment and mm producing brown. When a cat has two recessive d alleles, its fur is a light gray color regardless of which alleles of M/m are present.
Required:
State the phenotype and frequency for each of the following outcomes of a dihybrid cross:
a. M_D_
b. M__dd
c. mmD
d. mmdd
Answer:
a. M_D_ : 9/16 Black furred individuals
b. M__dd : 3/16 gray furred individuals (1/16 MMdd + 2/16 Mmdd)
c. mmD_ : 3/16 Brow-furred individuals (1/16 mmDD + 2/16 mmDd)
d. mmdd: 1/16 gray furred individuals.
Explanation:
Available data:
Dense pigment gene, D, codes for melanophilin.D allele dominant over d. Gene M/m is responsible for the production of the pigmentM is dominant over mIf D is present, M/m is expressedIf dd is present, M/m is not expressed DDMM, DdMM, DDMm, DdMm --->Black furDDmm, Ddmm ---> Brown furddMM, ddMm -----> Light gray furCross: between two dihybrids
Parental) DdMm x DdMm
Phenotype) Black-furred Black-furred
Gametes) DM, Dm, dM, dm DM, Dm, dM, dm
Punnet Square) DM Dm dM dm
DM DDMM DDMm DdMM DdMm
Dm DDMm DDmm DdMm Ddmm
dM DdMM DdMm ddMM ddMm
dm DdMm Ddmm ddMm ddmm
F1) 9/16 Black-furred individuals, D-M- (1/16 DDMM + 2/16 DDMm + 2/16
DdMM + 4/16 DdMm)
3/16 Brown-furred individuals, D-mm ( 1/16 DDmm + 2/16 Ddmm)
4/16 Gray-furred individuals, dd-- ( 1/16ddMM + 1/16 ddmm + 2/16 ddMm)
discribe the flow of energy from the sun to the producer and then to a consumer. I need help plz trying to get grades up
What is the function of the nucleus?
The function of the nucleus is to store the DNA of the cells of eurakyotic cells.
This is the puropse of a nucleus.
Hope it helps you!
Summarize the steps that occur in the process of chromosomal DNA replication. Please place the following steps in the proper order.
A. DnaA proteins bind to the origin of replication, resulting in the separation of the AT-rich region.
B. DNA helicase breaks the hydrogen bonds between the DNA strands, topoisomerases alleviate positive supercoiling, and single-strand binding proteins hold the parental strands apart.
C. Topoisomerases unravel the intertwined chromosomes, if necessary.
D. Primase synthesizes one RNA primer in the leading strand and many RNA primers in the lagging strand, and DNA polymerase III synthesizes the daughter strands of DNA.
E. DNA polymerase I removes the RNA primers and fills in that region with DNA, and DNA ligase covalently links Okazaki fragments together.
F. Replication continues until the two replication forks meet on the other side of the circular bacterial chromosome.
Answer:
The proper order is:
A. DnaA proteins bind to the origin of replication, resulting in the separation of the AT-rich region.
B. DNA helicase breaks the hydrogen bonds between the DNA strands, topoisomerases alleviate positive supercoiling, and single-strand binding proteins hold the parental strands apart.
C. Topoisomerases unravel the intertwined chromosomes, if necessary.
D. Primase synthesizes one RNA primer in the leading strand and many RNA primers in the lagging strand, and DNA polymerase III synthesizes the daughter strands of DNA.
E. DNA polymerase I removes the RNA primers and fills in that region with DNA, and DNA ligase covalently links Okazaki fragments together.
F. Replication continues until the two replication forks meet on the other side of the circular bacterial chromosome.
Explanation:
The process of DNA replication in prokaryotes starts at a point called ORIGIN OF REPLICATION. This site is where certain proteins recognize and bind to in order to kickstart the replication process. The following are orderly processes of DNA replication.
- DnaA proteins bind to the origin of replication, resulting in the separation of the AT-rich region.
- DNA helicase breaks the hydrogen bonds between the DNA strands to form two replication forks, topoisomerases prevent supercoiling of these separated DNA, and single-strand binding proteins hold the parental single strands apart, hence, making sure that they do not rewind again.
- In case DNA rewinds, topoisomerases unravel or disentangles the intertwined chromosomes, if necessary.
- DNA Primase synthesizes one RNA primer in the leading strand and many RNA primers in the lagging strand,which allows DNA polymerase III synthesize the daughter strands of DNA. Note that the synthesis of nucleotides on threading strand is continuous while nucleotides are synthesized in small fragments called OKAZAKI FRAGMENTS, on the lagging strand.
- DNA polymerase I removes the RNA primers and replaces with synthesized DNA in that region, and DNA ligase covalently links the Okazaki fragments (small fragments of DNA) together.
- Replication continues until the two replication forks meet on the other side of the circular bacterial chromosome.
blank are very small aquatic organisms, such as un regular algae or the larvae of some crustaceans
Answer:
Zooplankton
Explanation:
What can increase our confidence in a scientific claim or theory
Viores
fat
&
Minerals
e leed blood cells
The
SKELETAL
SYSTEM
1
*consists OF JOINTS.
BONCS, & CARTILAGE
*Provides structure, SuppORT
and PROTECTION
PROTECT
Organs
bones Join
Here with
ligamen
like
Calcium
3
3
JOINTS
alleviates
friction
2
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16 points
5.
Match the word/phrase with the correct place on the chart.
One over
3
4
1
2
Allow Movement
A Cushion For Your Bones
Bones
Cartilage
The colorless root like projections of mosses, liverworts, and hornworts, which anchor them to the substrate are called
Answer:
Rhizoids
Explanation:
Mosses, liverworts, and hornworts are three groups of a division of plants called BRYOPHYTA. These division of plants are referred to as "lower plants" because of their primitive features. They are non-vascular i.e they do not possess vascular conducting tissues e.g xylem, phloem etc.
In addition to this, bryophytes (mosses, liverworts, and hornworts) do not have true roots and leaves like other plants. Instead, they possess colorless root like projections called RHIZOIDS, which they use to anchor themselves to the substrate and absorb water.
What is measured of the average kinetic energy of all the particles of an object
Answer:
Temperature
Explanation:
Temperature is created by how fast particles move, so if they move faster, the environment would be warmer, etc.
Temperature is the kinetic energy of the particles in all technicalities.
Which organism is the least related to the other three organisms?
A. 1
B. 2
C. 3
D. 4
Answer:organism 2
Explanation:
The organism which is least related to the other three organisms is second. This is because the more the similarity of amino acid sequence, the more is the organism related.
What do you mean by Organism?An Organism may be defined as a living thing made up of one or more cells and able to carry on the activities of life.
In the given figure, the amino acid sequence SER is present in all the organisms, LEU is not present in organism 2 and ASN is the only amino acid sequence that is present only in organism 2.
Therefore, the organism which is least related to the other three organisms is second.
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A star has a mass that is 3.5 times that of the Sun. Assuming that it's on the main
sequence, how many solar luminosities is it?
Which domain would contain organisms that have membrane bound organelles?
O Archaea
O Bacteria
O Eukarya
O Protista
Answer:
Eukarya
Explanation:
Eukarya is the only domain with a membrane bound organelles.
Domain Eukarya contain organisms having membrane bound cell organelles. The correct option is C.
What is Eukarya?Domain Eukarya, is made up of organisms with nuclei as well as membrane-bound cell organelles in their cells.
It is also the only domain with multicellular and visible organisms such as humans, animals, plants, and trees. Bacteria and arachaea are unicellular organisms with no nucleus.
Thus, the correct option is C.
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Compare the distribution of mitochondria in the four organs, or organ parts, shown in the graph.
Answer:
More mitochondria present in the heart as compared to other organs.
Explanation:
The distribution of mitochondria is not the same throughout the body. The organ which perform more hard work in the body have more number of mitochondria in the cell because the organ needs more energy for performing its function. Heart is the organ in the body that performs more hard work so there are 5000 mitochondria present in each cell of the heart.
The organ that contains the highest amount of mitochondria is the heart.
Cells are the simplest units of the living organism which are organised in various amounts to form tissue.
These cells contain organelles that brings about the normal functioning of the cell.
An example of the organelle is mitochondria.
The mitochondria is the power house of the cell which is located in organs that requires a lot of energy.
Example of such organs are:
Heart,
Kidneys
Muscles
Brain.
The heart is known to have the highest mitochondria with about 5,000 mitochondria per cell.
Therefore to compare with the other organs, the heart contains the highest amount of mitochondria.
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2. The number of workers in agriscience in the United States is approximately
a. 21 million,
c. 100,000
b. 100 million.
d. 400,000.
Answer:
21 million
Explanation:
hope this helps
When vesicles of the cardiac sarcoplasmic reticulum (CSR) are incubated with ATP Mg^2+ and Ca^2+, they take up Ca^2+ and reach a pseudo steady-state. This is a steady state that changes, but slowly. The uptake of Ca2+ is mediated by the SERCA2a Ca-ATPase. The uptake reaction can be quenched by adding EGTA to the external solution, which binds the Ca^2+ outside of the vesicles, or by adding glucose plus hexokinase, that converts the ATP to ADP and glucose-6 phosphate. When the uptake reaction is stopped, Ca^2+ that was already taken up by the vesicles leaks out passively A. The amount of Ca^2+ taken up by the vesicles is generally normalized to the amount of CSR protein in mg rather than being expressed as a concentration. A typical steady state Ca2 uptake is 40 nmol mg^-1. In separate experiments, the enclosed volume of the CSR vesicles was determined to be 5 mu L mg. What is the approximate concentration of Ca^2+ inside the vesicles at steady-state? The total Ca^2+ concentration is its amount divided by the volume in which it is distributed. In this case the amount is 40 nmal mg CSR protein^-1 and the volume is 5 mu L mg CSR protein^-1, The concentration is estimated as B. The average vesicle size determined by electron microscopy is about 150 nm. What is the volume and surface area of a vesicle this size, assuming it is a sphere? C. Given that the enclosed volume of the aggregate vesicles is 5 iL mg-1, how many vesicles are there per mg of CSR protein? How much surface area is there per mg of CSR protein? D. The initial passive efflux at a load of 40 nmol mg when the pump is stopped is 16 nmol min^-1mg^-1. Convert this to a flux in units of nmol cm^-2 s^-1 by dividing by the surface area per mg of CSR protein and converting min to s. E. What is the passive permeability to Ca^2+ in cm s^-1?
Answer
I added 4 and 5 as an attachment due to time constraint.
Explanation:
1. at a steady state ca2+ taken by vesicle = 40n/mol
enclosed volume of CSR = 5μ/mg
concentration of ca2+ in vesicle =
40*10⁻⁶/5x10⁻⁶
= 0.008
= 8x10⁻⁹mol/L
2. radius of circle =75nM
volume = 150nm
volume of vesicle = 4/3 x pi x r³
= 1.33 x 3.14 x (75x10⁻⁹)³
= 1.77 x 10⁻²¹
when we convert this we get
1.77x10⁻¹⁸L since 1m³ is equal to 100oL
surface area =4x3.14x(75x10⁻⁹)²
= 12.56x5.625⁻¹⁵
= 7.065x10⁻¹⁴m²
this is 7.065x10⁻¹⁰cm²
3. number of vesicle/CSR
= 5x10⁻⁶/1.77x10⁻¹⁸
= 2.824x10¹²
surface are = 2.824x10¹² x7.06x10⁻¹⁰
= 19.95x10²
7. Which of the following is NOT an observation?
A. The grass is brown.
B. It has not rained in ten days.
O.It will rain tomorrow.
D. It is raining.
Answer:
O. It will rain tomorrow
Explanation:
You don't know if it's actually going to rain tomorrow. You just infered that it was going to rain tomorrow because of some other reason.
An organism that uses sunlight to create its own
food is known as a:
answers:
heterotroph
decomposer
producer
consumer
Which landform is created by flowing water?
.Cirques
.Gullies
.Horns
.Dunes
Answer:
B. Gullies
Explanation:
A hungry yeast cell lands in a vat of grape juice and begins to feast on the sugars there, producing carbon dioxide and ethanol in the process:
C6H12O6 + 2ADP + 2Pi + H+ → 2CO2 + 2CH3CH2OH + 2ATP + 2H2O
Unfortunately, the grape juice is contaminated with proteases that attack some of the transport proteins in the yeast cell membrane, and the yeast cell dies. Which of the following is the most likely cause of the yeast cell’s demise?
a. toxic buildup of carbon dioxide inside the cell
b. toxic buildup of ethanol inside the cell
c. diffusion of ATP out of the cell
d. inability to import sugar into the cell
e. inability to take water into the cell
Answer:
The correct answer will be
D.) inability to import sugar into the cell.
Explanation:
The grape juice is contaminated with proteases that attack some of the transport proteins in the yeast cell membrane, and the yeast cell dies. inability to import sugar into the cell
what are the function of protease ?Proteases are the enzymes found in all living organism like bacteria, algae, plants and animals and in some of the viruses.
They are mainly involved in the catabolism and digestion of proteins and cell signalling, involve in hydrolysis of peptide bonds and convert them to amino acids, which is then absorbed and utilised by cells.
They involve in blood coagulation process, cell division, growth, apoptosis and migration, recycling and transport across membranes.,
They participate the in activation of precursor proteins and zymogens.
Proteases provide immune support and regulate the process of tumour growth, metastasis, inflammation, etc.
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What does the fossil record show us?
Answer:
They show us that creatures before us, more feral, had lived and went extinct. And it also shows us the progression of fossils. (Evolution)
Explanation:
Scientists conclude the data of fossils, like the Jurassic age. Tyrannosaurus rexes were massive, carnivorous creatures. As scientists look at this data and go through the fossil records to show how we have evolved into modern people today.
inhibitor.
An enzyme inhibitor that binds at a location besides the active site is termed a(n)
A. activator
B. competitive
C. catalytic
D. allosteric
Answer:
Allosteric
Explanation:
An enzyme inhibitor that binds at a location besides the active site is termed an allosteric. Thus, option D is correct.
What are enzymes?Enzymes are the biological catalyst that speed up the chemical reaction that carries out in the body.Enzymes are protein by nature and there are number of enzymes present in our body such as salivary amylase, pepsin, renin, lyases, lygases etc.
The main function of enzyme is to make the metabolism fast as well as speed up the chemical reaction carried out in the body.Enzymes are protein by nature and there are number of enzymes present in our body such as salivary amylase, pepsin, renin, lyases, lygases etc.The best example of enzyme is salivary amylase which is an enzyme and it is present in the saliva and helps in the digestion of food.
Therefore,An enzyme inhibitor that binds at a location besides the active site is termed an allosteric. Thus, option D is correct.
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What is caused by the action of hot material rising and cool material sinking?
Answer: Heat transfer
Explanation:
Hot material such as hot air or liquid is more dense that cool material so it will rise. As it does so the cool material will sink towards the source of heat that is making the hotter materials hot and get heated as well which will enable it to rise and the whole cycle repeats.
This type of heat transfer is called Convection and it is very important to processes occurring on earth from basic things such as how water is heated in a kettle to how rainclouds are formed in the atmosphere.