Answer:
The correct answer is - option B. the cell membrane is selectively permeable, which controls the movement of materials in and out of the cell by passive and active transport.
Explanation:
The cell membrane is the most essential cell organelle that is mainly responsible for the regulation of homeostasis of the cell. It acts as a barrier between the outer environment and cell components are enclosed in the cell organelles and cytoplasm by regulating the movement of the material in and out of the cell.
This movement can be active or passive transport depending on the nature of the material as it is a selectively permeable membrane.
The correct answer is - option B.
Answer: Which of the organelles below were observable under high power? Check all the organelles that you could see.
cell membrane
nucleus
vacuoles
ribosomes
Explanation: it is A and B for the second one and the 1st one is also A
The variety and variability of organisms is called ______. One of the benefits of this kind of variety includes the ecosystem ______, which is the ability of an ecosystem system to recover after a disturbance. Other benefits of healthy ecosystems include ecosystem
______ such as pollinating crops, regulating pests, and maintaining soil structure.
Answer: Biodiversity, succession, services
Explanation:
I just had this on a test and got it right
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.
To learn more about Amino acid sequence, refer to the link:
https://brainly.com/question/17295633
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.
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
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:
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
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)
What is the effect of an enzyme on the energy of a chemical reaction
Answer:
it increases speed of chemical reaction
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.
Learn more about enzyme here:
https://brainly.com/question/14953274
#SPJ6
An organism that uses sunlight to create its own
food is known as a:
answers:
heterotroph
decomposer
producer
consumer
Which phase of mitosis is shown in the diagram?
O prophase
O metaphase
O anaphase
telophase
Answer:
metaphase
Explanation:
The phase which is shown in the figure is Metaphase. The correct option is B, metaphase.
Metaphase is a critical phase of mitosis, which is the process of cell division that leads to the formation of two genetically identical daughter cells. During metaphase, the chromosomes, which contain the cell's genetic material, align at the center of the cell in preparation for separation.
Metaphase phase of mitosis:
Chromosome Condensation: Prior to metaphase, during the preceding phase called prophase, the chromosomes condense. Each chromosome consists of two identical sister chromatids held together at a region called the centromere.Formation of the Mitotic Spindle: In metaphase, the centrosomes, which are structures located near the cell's nucleus, migrate to opposite ends of the cell. From each centrosome, microtubules extend and form a network called the mitotic spindle. Chromosome Alignment: The mitotic spindle exerts tension on the chromosomes, aligning them along the equator of the cell, known as the metaphase plate. Checkpoint Control: The cell possesses a checkpoint mechanism during metaphase, known as the spindle checkpoint or metaphase checkpoint.Once metaphase is completed, the cell proceeds to anaphase, during which the sister chromatids are separated and pulled to opposite ends.
Therefore, the correct option is B.
To know more about Metaphase, click here:
https://brainly.com/question/32675556
#SPJ5
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.
Learn more here:
https://brainly.com/question/10362080
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.
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 characteristic do all the organisms on this cladogram share?
A.fully bionocular vision B.being bi-pedal & having language C. complex brains D. partial bionocular vision & opposable thumbs
Answer:B
Explanation:
Help please someone please
Answer:
mhkhku
Explanation:
bmvgf.
Intermediate photographs should show the relation of evidence to other parts of the crime scene. A. True B. False
Answer:
True.
Explanation:
"adjective
adjective: intermediate
coming between two things in time, place, order, character, etc."
Pictures correlating to the crime scene are like puzzles to find out the other meanings or cause of another picture.
For example:
A opened jug of milk sits on a table.
There's a blurred figure of a hand hitting the jug.
The jug is now laying on the table, dripping everywhere.
-
If we take out the middle picture "There's a blurred figure of a hand hitting the jug.", then we would not know what hit it over. Did someone bump into the table? Did a cat climb onto the table and release its almighty strength onto it? All we would know that it was once standing upright.
TLDR; Without intermediate pictures, it would be hard to grasp what happened on the scene. Intermediate pictures all have something in common with each other to help interpret what occurred to the viewer.
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.
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.
Red–green color blindness is an X‑linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. When answering the given question, consider that the answers include the proportions of only some of the possible phenotypes; other phenotypes are also expected to occur but are not included.
1. If Bill and Martha marry, what types and proportions of children can they produce?
2. The following two genotypes are crossed: Aa Bb Cc X+ Xr × Aa BB cc X+Y, where a, b, and c represent alleles of autosomal genes and X+ and Xr represent X-linked alleles in an organism with XX-XY sex determination. What is the probability of obtaining genotype aa Bb Cc X+ X+ in the progeny?
Complete question:
Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes.
1. If Bill and Martha marry, what proportions of children with specific phenotypes would they be expected to produce? (The answers only include the proportions of some of the possible phenotypes; other phenotypes are also expected to occur but are not included.)
a. 1/4 color-blind girls with normal fingers, 1/4 boys with normal vision and polydactyly
b. 1/8 color-blind girls with polydactyly, 1/8 boys with normal vision and normal fingers
c. 1/3 girls with normal vision and normal fingers, 1/3 boys with normal vision and polydactyly, and 1/3 boys with normal vision and normal fingers
d. 1/6 girls with normal vision and polydactyly, 1/6 boys with normal vision and polydactyly
e. 1/8 color-blind girls with normal fingers, 1/4 boys with normal vision and polydactyly
2. The following two genotypes are crossed: Aa Bb Cc X+ Xr × Aa BB cc X+Y, where a, b, and c represent alleles of autosomal genes and X+ and Xr represent X-linked alleles in an organism with XX-XY sex determination.
Answer:
b. 1/8 color-blind girls with polydactyly, 1/8 boys with normal vision and normal fingers 4/256 aa Bb Cc X+X+Explanation:
Due to technical problems you will find the complete explanation in the attached file
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?
12. Energy is stored in different forms such as (check all that apply)
- chemical
- mechanical
- electrical
- radiant
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.
Prophase
Metaphase
Anaphase
Telophase
True or False--A model can never be revised. A
Answer:
definitely false, all models and theories can be changed, as not much is truly known
Explanation:
Which landform is created by flowing water?
.Cirques
.Gullies
.Horns
.Dunes
Answer:
B. Gullies
Explanation:
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
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.
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
which monosaccharide has the chemical formula C6 H12 06?
Frutose
Glucose
All of the other choices
Galactose
Answer:
All of them!
Explanation:
Each of the options (glucose, fructose and galactose) have the general formula: C6 H12 O6, due to them all being hexose monosaccharides.
Hope that helps! x