Answer:
aw w
Explanation:
aw w
assume that life on Mars requires cell potential to be 100mV, and the extracellular concentrations of the three major species are following (mmol/L): Na : 145; K : 4; Cl- : 120. Choose one species and assume that other two probabilities are zero. Design the cell by calculating the intracellular concentration of the chosen species.
Answer:
Explanation:
From the information given:
The cell potential on mars E = + 100 mV
By using Goldman's equation:
[tex]E_m = \dfrac{RT}{zF}In \Big (\dfrac{P_K[K^+]_{out}+P_{Na}[Na^+]_{out}+P_{Cl}[Cl^-]_{out} }{P_K[K^+]_{in}+P_{Na}[Na^+]_{in}+ P_{Cl}[Cl^-]_{in}} \Big )[/tex]
Let's take a look at the impermeable cell with respect to two species;
and the two species be Na⁺ and Cl⁻
[tex]E_m = \dfrac{RT}{zF} In \dfrac{[K^+]_{out}}{[K^+]_{in}}[/tex]
where;
z = ionic charge on the species = + 1
F = faraday constant
∴
[tex]100 \times 10^{-3} = \Big (\dfrac{8.314 \times 298}{1\times 96485} \Big) \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]3.981= \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]exp ( 3.981) = \dfrac{4}{[K^+]_{in}} \\ \\ 53.57 = \dfrac{4}{[K^+]_{in}}[/tex]
[tex][K^+]_{in} = \dfrac{4}{53.57}[/tex]
[tex][K^+]_{in} = 0.0476[/tex]
For [Cl⁻]:
[tex]100 \times 10^{-3} = -0.0257 \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]
[tex]-3.981 = \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]
[tex]0.01867 = \dfrac{120}{[Cl^-]_{in}}[/tex]
[tex][Cl^-]_{in} = \dfrac{120}{0.01867}[/tex]
[tex][Cl^-]_{in} =6427.4[/tex]
For [Na⁺]:
[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]
[tex]53.57= \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]
[tex][Na^+]_{in}= 2.70[/tex]
What is osmosis and give an example
Answer:
An example of osmosis is slowly learning how to sew after sitting next to an experience seamstress. ... An example of osmosis is when red blood cells, which have a high concentration of protein and salt, are placed in a lower concentration fluid like water, the water will rush into the red blood cells.
Explanation:
A scientist discovers a fossil of an animal and places it in the fossil record. The organism’s bones are similar to the bones of animal T, which appears earlier in the fossil record. Which conclusion is most reasonable?(1 point)
The fossils came from the same organism.
The fossils are from an ancestor of animal T.
The fossils are from animals that lived at the same time.
The fossils are from a descendant of animal T.
2. Why do organisms evolve?(1 point)
Organisms naturally select traits that help them survive and reproduce.
Organisms with traits that help them survive and reproduce in their environment pass on those traits.
Changes in the environment cause organisms to change.
Organisms make changes to help them survive and reproduce in their environment.
3. Scientists examine fossils from three different animals. They determine that all three animals share similar structures and record their observations as follows:
Animal A and animal B have somewhat similar structures.
Animal A and animal C have very similar structures.
Animal B and animal C have very similar structures.
The scientists use the similarities to determine the order in which the fossils should appear in the fossil record. Based on the scientists’ observations, which order is the most reasonable?
(1 point)
B, A, C
A, C, B
A, B, C
C, B, A
4. Scientists discover fossilized bones from two different animals. The scientists consult the fossil record to learn more about the fossils. Which question will the fossil record best answer?(1 point)
How are the animals related to modern animals?
What killed the animals?
Which animal was better equipped to survive?
Which animal is older?
Answer:
1) The fossils are from a descendant of animal T.
2) Organisms with traits that help them survive and reproduce in their environment pass on those traits.
3) A, C, B
4) Which animal is older?
5) Fossils of Archaeopteryx have traits of both dinosaurs and birds.
Explanation:
The fossil records are used to show that modern creatures are distinct from those from the past and to illustrate how evolution has progressed, hence for questions 1- B, 2- B, 3- D, for 4- D.
What is the fossil record?Due to individual variation within a population, certain members of the population are more likely to live and procreate under a specific set of environmental conditions.
The majority of these people live longer and have more children, passing on their beneficial features to the following generation.
C has the most similar structure, B has the second most similar structure, and A has the least similar structure.
Two separate creatures' petrified bones have been found by scientists. To discover more about fossils, the experts consult the fossil record.
Therefore, modern creatures are distinct from those from the past, and to illustrate how evolution has progressed, hence questions 1- B, 2- B, 3- D, for 4- D.
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Scientists can use mutants to study metabolic pathways. These organisms have a mutation in a gene encoding a metabolic pathway enzyme that results in the inactivation of that enzyme. Saccharomyces cerevisiae (a yeast species) mutants are available that grow on fructose, but not glucose. This growth defect results from a mutation in the gene encoding what enzyme?
Answer:
jlgd7trus576s6rdyird
Explanation:
Mitosis is the process of one cell splitting apart to form two cells.
True
False
______________________________
QUESTION 2.
Chromatin consists of long strands of material located within the nuclear membrane.
True
False
______________________________________
Question 3.
The process of producing new cells is called cell reproduction.
True
False
Answer:
1.true
2.true
3.False.
Explanation:
for the third guess it should be cell division
help pleaseee
give an example of lamarcks theory of evolution:
PLEASE HELP QUICK!
wut is a population, refering to one in an ecosystem? pls give examples
Answer:
It's the quantity of a living organism inside that ecosystem. Like saying the snake population is 4 million in the Desert and such
There are millions of organisms on Earth that scientists have classified into different levels of organization. Which of these characteristics would be most
Important to scientists when classifying organisms?
where the organism lives
how small the organism is
the genes of the organism
the shape of the organism
Previous
Pau
5.50
A
14
3
$
4
backspace
5
6
7
8
o
Answer:
A
Explanation:
multiply 5.50 and you know X $50
Decide whether each statement is describing anaerobic or aerobic cellular respiration.
Explanation:
38 molecules=Aerobic
2 molecules=Anaerobic
Oxygen levels low=Anaerobic
Lactic acid=Anaerobic
Oxygen levels high=Aerobic
What is the difference between global effects and local effects.
Answer:
golbal means around the world but local means next to you
Answer:
A global effect generally affects, as the term implies, the world as a whole, or at least a major part of the world, while a local effect would be just in a distinctive area.
For example, if the world is heating up due to CO2 emissions, it heats up in an global effect, resulting in the median temperature rising in all areas of the world. However, the world heating up may only mean a drought in distinctive areas that are typically already leaning towards the drier side (local effect), while the others receive a greater than usual volume of water due to rising temperatures.
~
water blank when it becomes ice
just a little help!
Answer:
Its C
Explanation:
Twins mostly share the same genes and genes can't mutate after birth
What does a DNA repair mutation cause in the Cell cycle?
Answer:
Mutation rates increase substantially in cells defective in DNA mismatch repair or in homologous recombinational repair (HRR). Chromosomal rearrangements and aneuploidy also increase in HRR defective cells. Higher levels of DNA damage not only cause increased mutation, but also cause increased epimutation.
what is the entire external body of a crustacean called
Answer:
exoskeleton
Explanation:
What is weathering - For science
Answer:
Weathering is the breaking down of rock
Explanation:
Pls mark it as brainlest
Answer:
breaking down/ dissolving of rocks & minerals
Explanation:
water, ice, acids, salt, plants, animals and changes in the weather temperature
Bone is composed of
A. Living cells, protein fibers, and calcium salts
B. Living cells, dead cells, and protein salts
C. Synovial fluid, protein fibers, and calcium salts
D. Living cells, bone marrow, and calcium fibers
Answer:
The most suitable answer :A. Living cells, protein fibers, and calcium salts
Explanation:
see image
Answer:
A. Living cells, protein fibers, and calcium salts
Explanation:
Bone is composed of living cells, protein fibers, and calcium salts
Eagles build nests, like the one shown.
How does this behavior affect the survival of the eagle population?
A. It communicates to the offspring the best way to reproduce.
B. It helps attract a mate and produce offspring.
C. It signals that the bird is ready to mate and produce offspring.
D. It provides a safe place for offspring to grow.
Answer:
The answer is:
D.It provides a safe place for offspring to grow.
Explanation:
The survival of offspring is crucial, especially in the bird world.If you lose offspring, there will be no future for your kind because you lost the new ones.
Planting large numbers of trees would result in —
A
an increase in oxygen production
B
a decrease in oxygen production
C.
an increase in carbon dioxide production
D
a decrease in carbon dioxide production
Lung cancer contributes to more cancer related deaths in men and
women than any other cancer worldwide, with a death rate of 1.38 million
lives per year. Tumors can grow in airways resulting in obstructions and
difficulty breathing Lung cancer is caused by -
a) uncontrolled meiosis respiratory tract cells
b) One DNA change that stop cellular division
c) accumulation of genetic damage resulting in cell cycle disruptions
d) none of the above
Answer:
b
Explanation:
HURRY DUE TODAY
The term for male and female reproductive structures found in separate flowers on the same plant is,
Group of answer choices
hermaphroditic
imperfect
monoecious
dioecious
Answer:
hermaphroditic as it is found in both genders
Explanation:
Here ya go, I hope this helps zoey
Answer: hey CC text me on Quora
Explanation:
Why do you, as a living organism, need to continually consume food?
Choose 1
answer:
(Choice A) A Food is broken down by catabolic pathways and converted to ATP, which is then used to fuel anabolic pathways.
(Choice B) B Food is broken down by anabolic pathways and converted to ATP, which is then used to fuel catabolic pathways.
(Choice C) C Food is broken down by endergonic reactions and converted to ATP, which is then used to drive exergonic reactions.
(Choice D) D Immediately upon consumption, food enters cells to directly fuel a variety of reactions.
Answer:
(Choice A)A food is broken down by catabolic pathways and converted to ATP, which is then used to fuel anabolic pathways
A Food is broken down by catabolic pathways and converted to ATP, which is then used to fuel anabolic pathways.
What is Food chain?From microscopic algae to enormous blue whales, depends on food to thrive. Each food web represents a possible route for nutrients and energy to travel through the ecosystem.
As an illustration, grass makes its own sustenance from sunshine. A bunny consumes some grass. Eaten by a fox, the rabbit. When a fox dies, microbes decompose its remains and return it to the soil, where it feeds grass-like plants.
Grass is consumed by a wide variety of animals, and rabbits can also consume other plants besides grass. Foxes can consume a wide variety of animals and plants. These living organisms can all be found in different food chains.
Therefore, A Food is broken down by catabolic pathways and converted to ATP, which is then used to fuel anabolic pathways.
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Any one know this one please help
Answer:
Invasive species
Explanation:
The calcium ion passes easily through the membrane of one cell but
cannot cross the membrane of a second cell. Which part of the plasma
membrane allows this substance to cross? *
- Phosphate groups of the phospholipid bilayer allow the ions to cross.
- The fatty acid tails of the phospholipids allow the ions to cross.
- Protein channels in the plasma membrane allow the ions to cross.
- Carbohydrate groups on the membrane allow the ions to cross.
Answer:
Protein channels in the plasma membrane allow the ions to cross.
Protein channels which are present in the plasma membrane of the cell allow the ions to cross the plasma membrane. Thus, the correct option is C.
Channel protein is a kind of protein which is found embedded in the plasma membrane of the cell. Channel proteins function similar to a pore and it allows the diffusion of small ions and water molecules through them. Channel proteins are lipoproteins and these are synthesized in the rough endoplasmic reticulum of the cell near the nucleus.
Ion channels are the transmembrane proteins whose canonical function is the transport of ions and molecules across the plasma membrane to regulate cell membrane potential and also play an essential role in neural communication, nerve conduction, and muscle contraction in the body.
Therefore, the correct option is C.
Learn more about Protein channels here:
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1. What happens to a plant that is put into a dark place? The plant's green color fades because it cannot perform photosynthesis without light. It grows taller.
Answer: The answer is the green part of the plant faces away because it cannot perform photosynthesis without light.
Explanation: The reason for this is because sunlight is always important to receive while performing photosynthesis because without sunlight, the plant would lose one of its major factors for photosynthesis.
Which of the following describes a structure that both prokaryotic and eukaryotic cells have in common? (2 points)
This membrane-bound organelle encloses the cell's DNA and is where DNA replication occurs.
This organelle is composed of a stack of membrane sacs where proteins are modified and stored.
This organelle extracts energy stored in glucose molecules to power cell functions.
This organelle is composed of protein and RNA and is used to make proteins for the cell.
Answer:
The correct answer would be A)This organelle is composed of protein and RNA and is used to make proteins for the cell. A ribosome is a vesicular structure present in both prokaryotic and eukaryotic cells. ... They are the site of translation in both prokaryotic and eukaryotic cells.
Explanation:
What is the answer to this
Answer:
D
Explanation:
a reptile egg is shown in the diagram which best describes function of the structure labeled y?
food source
protection
waste collection
gas exchange
Answer
food source
hope this helps
Answer:
A or food source 100%
Explanation:
Fish sperm consists mostly of the male fish's DNA. If tested chemically, there would be relatively
high amounts of
A) Nitrogenous bases, sugar and phosphate groups
B) Phospholipids and steroids
C) Triglycerides and ATP
D) Amino acids and unsaturated fats
What should the student do after he has collected and analyzed his data?
Write a lab report that summarizes his experiment
0 Share his results with his class and ask for their feedback
O
Remove all data that do not support his conclusions,
Based on scientific methods
Answer:
Write a lab report that summarizes his experiment