The gecko is a reptile that has the amazing ability to climb smooth surfaces - even glass. Recent discoveries indicate that geckos stick to smooth surfaces via van der Waals interactions between septae on their feet and the smooth surface. When not selling car insurance, geckos climb smooth surfaces.

a. How is this method of stickiness advantageous to the gecko over covalent interactions?
b. Given that van der Waals forces are among the weakest molecular interactions, how can the gecko's feet stick so effectively?

Answers

Answer 1

Answer:

a) This method of stickiness is advantageous over covalent interactions because it is weak and easily reversible.

b) The feet are equipped with millions of septae which collectively produce a synergistic effect that produces a powerful adhesive effect.

Explanation:

Geckos have their feet studded with tiny hair-like substances called septae, and these substances interact with the surfaces on which the Gecko climbs using weak van der Waals forces to produce stickiness.

a) The van der Waals interactions for the purpose of climbing is of more advantage over the covalent method of interaction because climbing involves a repetitive action of adhesion to the surface and destruction of such adhesion, and this involves the creation and the breaking of the bonds between the two surfaces easily. van der Waals forces being easily broken helps to achieve effective climbing. If the method of interaction is with a comparatively strong bond, the speed of creation and destruction of such bond is reduced, and the effectiveness of climbing is reduced.

b) Although van der Waals forces are weak forces, each foot of the wall Gecko has millions of septae that each create a van der Waals interaction, and the collective interactions produce a powerful adhesion causing the feet to stick effectively.


Related Questions

PLEASE HELP ME WITH THIS

Answers

Answer:

more exposure to sunlight and therefore increase photosynthetic production

Explanation:

Potential energy is
a. Stored energy
b. Energy in motion
c. kinetic energy
d. moving energy

Answers

potential energy is stored energy!!!!

Label flower parts on it

Answers

Answer:

AntherFilamentStamenStigmaStyleOvaryPistilOvum/OvulePetalSepal

You have isolated a new single gene mutation in zebrafish you call Casper because the mutant fish are clear (no pigments in the scales). You perform the following crosses: Cross Progeny Wild type X Casper 20 clear, 19 normal Casper X Casper 21 clear, 10 normal a. You notice that each cross produced a similar number of clear offspring but different number of normal offspring. What is going on here

Answers

Answer and Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached files

Which part of the amino acid determines the uniqueness of the amino it as well as the shape of the protein

Answers

Answer:

The primary structure of a protein - its amino acid sequence - drives the folding and intermolecular bonding of the linear amino acid chain,which ultimately determines the protein 's unique three-dimensional shape.

I hope it's helpful!

HELP ME PLEASE ILL GIVE YOU POINTS AND BRAINLIEST

word bank :
methane
reemitted heat
reradiated heat
solar radiation
carbon dioxide

label the diagram

Answers

Answer:

A= Methane

B= Carbon Dioxide

C= Solar Radiation

D= reemitted heat

E = reradiated heat

Sauce me brainliest

The energy of an object due to its temperature is called
a. Temperature Energy
b. Thermometer
c. Thermal Energy
d. Chemical Energy

Answers

Answer:

C. Thermal energy.

The energy of an object due to its temperature is called Thermal energy.

My main goal is to produce ATP energy

Answers

my main goal is to find my will to be alive

Answer:

mitochondria is my name

Explanation:

Osmosis is defined as movement of SOLVENT across a ___________ membrane

Answers

Answer:

Osmosis is defined as movement of SOLVENT across a semipermeable membrane.

Explanation:

Hope this helps!

What do these do ?Endocrine Glands, hormones :

A. Transports nutrients and oxygen to the body, removes waste

B. Sends chemical messages for growth, reproduction, and
: Kidneys, bla energy processes

C. Filters the blood to removes toxins, excess water, and other
wastes

D. Works with skeletal system to procide movement, helps
digest food, pump heart, and move blood through veins
temperature, detects stimuli fro

E. Produces sex cells (sperm and ovum), nurtures and protects growing fertilizer egg

F. Provides support and structure to the body, stores minerals, produces blood cells, works with muscular system for movement

Answers

Answer:

F. Provides support and structure to the body, stores minerals, produces blood cells, works with muscular system for movement

Which method of genetic recombination is illustrated in the diagram?

Answers

Answer:

The correct answer is this one "independent assortment." Independent assortment refers to the formation of random combinations of chromosomes in meiosis and of genes on different pairs of homologous chromosomes.

Explanation:

I wish This would be helpfull for you

What is the probability that the son is colorblind?

Answers

Answer:

I do believe 50 percent

Explanation:

You get traits from both mom and dad

If they have children with a man who is not color blind, then each daughter has a 50% chance of being a carrier and each son has a 50% chance of being color blind.

The five factors that are common characteristics of living things include cellular composition, reproduction, response and adaptation, metabolism, and what?

A. diversity
B. systems
C. evolution
D. Phylogenetics

Answers

Answer:

option C is answer evolution

Five factors are common characteristics of organism reproduction, reaction and adaptation, metabolism, and evolution.

What are the five characteristics of living things?

Big idea: All living things share certain properties such as tissue, fertility, growth and development, energy expenditure, homeostasis, response to the environment, and adaptability.

What are the characteristics of living things?

Organisms have many characteristics of different pronunciations. They breathe, move, respond to stimuli, breed, grow and depend on the environment.

Learn about 5 factors that are common characteristics of living things at

https://brainly.com/question/24394893

#SPJ2

Compared to small cells, large cells have more trouble doing what

Answers

Answer:

As the cell grows, it faces some issues such as:

• Running out of the nutrients and requirement of growth factors.

• Running out of the space.

• Require appropriate gas exchange.

As compared to the smaller cells, larger cells have more issues in moving the required materials inside and excretory products outside. This is because the ratio of the surface is to volume is turning more and more unbalanced and takes much longer time for the cellular processes to take place.

Explanation:

Which action is necessary for a solar eclipse to occur?
The Moon needs to be full.
Earth needs to pass in front of the Sun.
The Sun needs to pass in front of the Moon.
The Moon needs to pass between Earth and the Sun.

Answers

The Moon need to pass between Earth and the Sun is the answer

HELP ASAP!!!
Proteins are a type of biomolecule with a wide variety of functions. Which statement is correct about the digestive system and proteins?

Question 1 options:

Enzymes in your saliva start breaking down the carbohydrates in food


Ready to use energy is released as the protein is broken down


The large intestine absorbs proteins for use in cells.


The liver manufactures bile salts that help break down fats in proteins

Answers

Answer:

Enzymes in your saliva start breaking down the carbohydrates in food

Explanation:

It makes sense, your digestive system consists of your mouth, esophagus, stomach, pancreas, liver, gallbladder, small intestine, large intestine, and anus. As soon as you put food in your mouth you break down your food. Also I took the test, hope you make an good grade!!!

The statement 'enzymes in your saliva start breaking down the carbohydrates in food' is correct about the digestive system and proteins.

The digestive system is an organ system where organs work together to digest foods.

Enzymes are specific proteins that carry out specific chemical reactions.

Digestive enzymes such as amylase are secreted by the salivary glands in order to help with the digestion of foods.

In conclusion, the statement 'enzymes in your saliva start breaking down the carbohydrates in food' is correct about the digestive system and proteins.

Learn more in:

https://brainly.com/question/479705

During what phase of meiosis does sister chromatids align at the equator?

Answers


During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells. Then in anaphase II, the chromosomes separate at the centromeres. The spindle fibers pull the separated chromosomes toward each pole of the cell.

In England, after the trees changed from light to dark, what happened to the color of
the moths over time?
More black moths than white moths appeared.
Grey moths developed.
The smoke stained the moths changing their color.
More white moths than black moths appeared.

Answers

Answer:

option A

Explanation:

is the correct answer of this question.

plz mark my answer as brainlist plzzzz.hope this will be helpful to you.

Answer:

I would have to say

A. More black moths than white moths appeared.

Explanation:

A black form of the peppered moth rapidly took over in industrial parts of the UK during the 1800s, as soot blackened the tree trunks and walls of its habitat. And it was indeed an early discovery; black moths, strikingly different from the insect's usual mottled white.

What is the function of the phloem?

Answers

Answer:

The phloem transport food which is synthesized in leaves by the process of photosynthesis to the lower part of the tree or plant.

hope it helps

Understanding the molecular basis of life helped in developing many technologies some used to further discover the cell, and others used to diagnose diseases or create organs or perform surgeries. Choose one technology and describe it briefly indicating its uses. 2. In what ways might genetically engineered organisms pose a threat to the health and safety of human populations

Answers

Answer:

1- The CRISPR-Cas system

2- Genetically modified organisms raise concerns associated with allergic reactions, horizontal gene transfer and outcrossing

Explanation:

The CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats)-Cas (CRISPR-associated) technology is widely used in medicine and research. The CRISPR-Cas is a versatile RNA-programable genome editing system capable of introducing genetic modifications at target DNA sequences. This technology is based on the natural bacterial immune system that cleaves bacteriophages and plasmid DNA sequences. Moreover, Genetically Modified Organisms (GMO) have historically raised three major concerns on human health: 1-the allergenicity of GMO foods, 2-the ability that GMOs might have to insert genes through horizontal transfer and 3-outcrossing between GMOs and (genetically) unmodified crops, which are further consumed as non-GM foods.

Why are all of us considered scientists to some extent?
O A. Everyone has questions about the natural world.
O B. Everyone writes and tests hypotheses.
O C. Everyone takes measurements and collects data.
O D. Everyone performs scientific experiments.

Answers

Answer:

A

Explanation:

well most of these are ture (Only due to school) the one answer that would apply to people outside of a school setting it A

Which choice shows the correct order of the cell cycle?

A. Mitosis --> Cytokinesis --> Interphase

B. Mitosis --> Interphase --> DNA Replication​

Answers

Answer:

correct order of the cell cycle? A

What are the monomers of Carbohydrates?

A. Monosacharides
B. Nucleic Acids
C. Amino Acids
D. Fatty Acids

Answers

Explanation:

A. Monosacharides

....... from Greek

monos = single

sacchar = sugar

Rattlesnake Species
100
Average Length (cm)
8 8 8 8 8 8 8 %
60
Mojave
Massasauga
Western
Diamondback
O
Black-tailed
1. Which type of information about rattlesnakes
does the bar graph above show? SCIL15.2
adaptation
evolution
mimicry
variation

I needdd helpppp plssss

Answers

Answer:

cool

Explanation:

this is easy I am not going to waist a lot of time but I will give you a cool video to watch in you tube

A new human species was found on a distant planet, whose genetic inheritance and process of reproduction is identical to that of humans on earth, however, their phenotypes are much different. You are tracking two phenotypes in this new species: eye shape and tail size. The single gene that controls eye shape (gene E) is unlinked from the single gene that controls tail size (gene T). Square eyes is the dominant eye shape and round eyes is the recessive eye shape. Long tail is the dominant tail size and short tail is the recessive tail size.

Required:
An individual of this new species is heterozygous for gene E and heterozygous for gene T. What is their genotype and phenotype?

Answers

Answer:

The individual has the genotype Ee (for the eyes) and Tt (for the tail) and has square eyes and a long tail.

Explanation:

If an individual is heterozygous, it means that he has a dominant allele and a recessive allele for each genotype. In this case, if the individual is heterozygous for the E gene, he has the genotype formed with the "Ee" alleles. If the same individual is heterozygous for the T gene, it has the genotype formed by the "Tt" alleles.

Individuals with heterozygosis will present phenotypes related to the dominant allele, since the recessive allele is only expressed in hom0zygosis. In this case, the individual will have the phenotype square eyes and long tail.

Once homeostasis is reached, no changes or adjustments are needed because permanent balance has been reached

-true
-false​

Answers

Answer:

True

Explanation:

How can you tell the difference
between a plant cell and animal cell?

Answers

Answer:

I hope it helps you a lot!

:P

Explanation:

Answer:

Animal cell has no cell wall but plant cell has cell wall made of cellulose

1.The chemical equation for photosynthesis is 6CO2 + 12H20 + light energy= C6H1206 +602 + 6H2O
True
False

Answers

Answer:

False

Explanation:

It's this:

6CO₂ + 6H₂O + light energy ⇒ C₆H₁₂O₆ + 6O₂

If there were 12 H₂O molecules, the equation would be unbalanced.

Have a great day!

What do these do ?
Kidneys, bladder, liver

A. Transports nutrients and oxygen to the body, removes waste

B. Sends chemical messages for growth, reproduction, and
: Kidneys, bla energy processes

C. Filters the blood to removes toxins, excess water, and other
wastes

D. Works with skeletal system to procide movement, helps
digest food, pump heart, and move blood through veins
temperature, detects stimuli fro

E. Produces sex cells (sperm and ovum), nurtures and protects growing fertilizer egg

F. Provides support and structure to the body, stores minerals, produces blood cells, works with muscular system for movement

G. Community communications with and controls all other body systems, response to stimuli from inside and outside the body

Answers

Answer:

C

Explanation:

The kidneys are bean shaped organs about the size of an adult fist. Most people are born with two kidneys. They are located on each side of the backbone, against the back wall of the abdomen, at about the level of the lowest rib.

The liver detoxifies various metabolites, synthesizes proteins, and produces biochemicals necessary for digestion. Its other roles include the regulation of glycogen storage, decomposition of red blood cells, and the production of hormones. It is also the largest internal organ in the body.

Which property of water allows it to dissolve substances like sodium Which property of water allows it to dissolve substances like sodium chloride and glucose but prevents it from dissolving lipids?

A. pH

B. polarity

C. adhesion

D. cohesion

Answers

It's polarity I think

Polarity is an intrinsic property of water associated with its behavior to dissolve substances like sodium chloride and glucose.

What is polarity?

It is a property of high importance because it defines the behavior of these related to other properties.

It represents the unequal electrical charges in the same molecule, said unequal splitting of electrons makes water a polar molecule.

Therefore, we can conclude that polarity is an intrinsic property of water associated with its behavior to dissolve substances like sodium chloride and glucose.

Learn more about polarity here: brainly.com/question/12628409

#SPJ2

Other Questions
Do you think "democracy" would work in the United states?why?why not? PLEASE HELP ASAP!! 6. As you read the paragraph below, decide how relevant each fact is.Jeff realized right away that his bike was missing. He saw that the bike lock was cut. His bike was blue and silver. He began to run up thestreet looking right and left.Which fact above is the least relevant?Jeff realized right away that his bike was missing.He began to run up the street looking right and left.His bike was blue and silver.He saw that the bike lock was cut. y=-4x+63x + 4y = -2Is (2, 2) a solution of the system?Choose 1 answer:- Yes- No -6 x (-8) = What is this answer I am stuck on it? Which expression is equivalent to |a|5 ?a 5 or a 5a 5 and a 5a 5 and a 5a 5 or a 5 If you could change one thing about the modern world we live in,what would it be? Explain why. The area of a square garden is 2025 square meters. Find the cost of fencingthe garden at Rs 5 per meter. There are 18 suites altogether in the hotel, how many suites are there on each floor if each floor has the same floorplan? prostate cells usually require testosterone and other androgens to survive. but some prostate cancer cells thrive despite treatments that eliminate androgens. one hypothesis is that estrogen, often considered a female, may be activating genes normally controlled by an androgen in these cancer cells. desribe one or more experiments to test this hypothesis Mitosis vs Meiosis, someone help me with this, ill give brainiest. A man knows that his apple tree is 51 ft high. At 11:00 am the tree casts a shadow of 68 ft. What is the angle of elevation of the sun? Round to the nearest tenth Which statements reflect the process of electrolysis? Check all that apply. Water is formed from ions of hydrogen and oxygen. The electrical reactions in a rechargeable battery can be reversed. The cathode becomes the electrode for reduction. The cathode takes on the metal deposits or layers. Decomposition of ores produces separated elements. Decomposition of ores produces low energy products. Solve the system of equationsnegative x plus 2 y equals 2minus x plus y equals negative 1 Due in a few minutes-please help me solve these geometry problems!!! How are y'all doing? Shelbi Russey: AttemptWhich of the following is a simple sentence?Martin Luther King Jr. was an American minister and activist for civil rights in the1950s and 1960s.5Martin Luther King Jr. was an American minister who was also an activist for civilrights in the 1950s and 1960s.9Martin Luther King Jr. was an American minister; later, in the 1950s and 1960s,he was an activist for civil rights,Martin Luther King Jr, who was an American minister, was also an activist, andhe fought for civil rights in the 1950s and 1960s.Question 8 (1 point) Saved what is the quotient of 0.6243 help need help ASAP super hard? free brainly A helium atom that has only two electrons will have its electrons in which orbital(s)? What material is this woman's sleeves?