what is the function of folds and villi

Answers

Answer 1

Answer:

The inner wall of the small intestine is covered by numerous folds of mucous membrane called plicae circulares. The surface of these folds contains tiny projections called villi and microvilli, which further increase the total area for absorption.

Explanation:

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Related Questions

As you read in this chapter, fungi have long formed symbiotic associations with plants and with algae. How may these two types of associations lead to emergent properties in biological communities

Answers

Answer:

Fungi show symbiotic association with algae and plants. With plants, they thrive as endophytes in a form of the symbiotic association. This symbiotic association results in the emergence of novel characteristics in the world of biology.  

The lichens function as a tool in finding the quality of air, as they grow in the environment containing good air quality. The tolerance towards heat is another characteristic. Some of the endophytes are witnessed in the plants, which grow in very hot conditions.  

At such conditions, no fungi or plant can thrive, however, in the symbiotic association, they possess the tendency to thrive. If one tries to separate them, it results in the death of both.    

Explanation:

Which type of energy refers to the sum of potential and kinetic energies in the particles of a substance?

Answers

Answer:

The answer is Internal energy

KE + PE = IE

Explanation:

The sum of potential and kinetic energy is refers to mechanical energy which is expressed by motion  

Answer:C for edge (internal energy)

Explanation:

In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Phenotypic outcomes of their offspring? (hint: a punnett square will help you determine this).

In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Genotypic outcomes of their offspring? (hint: a punnett square will help you determine this).

All the offspring of a cross between a black-eyed mendelien and an orange-eyed mendelien have black eyes. What is the expected F2 phenotypic ratio of a cross between two F1 black-eyed mendeliens?
A) 1 black-eyed:1 orange-eyed
B) 3 black-eyed:1 orange-eyed
C) 1 black-eyed:3 orange-eyed
D) 1 black-eyed:0 orange-eyed

Answers

The phenotypic ratio of the cross is as follows: 3 red antennas: 1 white antenna

For question 2, the phenotypic ratio of the F2 generation is: 3 black-eyed: 1 orange-eyed

QUESTION 1

According to the first question, a gene coding for antenna color in butterflies is involved. Red antennas (“R”) is dominant to white antennas (“r”). Hence, a butterfly with genotype "Rr" will be phenotypically red.

According to this question, If both parents are heterozygous for red antennas i.e. Rr (red antenna) × Rr (red antenna), the following gametes will be produced: R and r. Using these gametes in a punnet square (see attached image), the following phenotypic ratio of offspring is produced:

3 RED ANTENNAS (RR, Rr, Rr) : 1 WHITE ANTENNA (rr)

2. In the second question, all the offspring of a cross between a black-eyed mendelien (BB) and an orange-eyed mendelien (bb) have black eyes (Bb). In a cross between two F1 black-eyed mendeliens i.e. Bb × Bb, the following proportion of offspring is produced:

BB, Bb, Bb, bb

Hence, a phenotypic ratio of 3 black-eyed: 1 orange-eyed

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A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to drop?

Answers

Answer:

The kinetic energy of the water molecules decreases which causes the liquid in the thermometers to drop.

Explanation:

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All parts of a nonvascular
plant must be near a
because it doesn't have
long roots.

A. water source
B. heat source
C. food source
D. air source

Answers

Answer:

a.water source

Explanation:

Which part of plant carries water and minerals from roots to other parts of the plant

Answers

Answer: The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots. Xylem cells constitute the major part of a mature woody stem or root.

hi can u Help me in my hw, Define the following terms:1)Epicenter 2)Seismograph(don't answer if u don't know the answer plz)​

Answers

Answer:

Epicenter is the point on Earth's surface directly above the focal point of the earth quake.

Actually it's above the hypocenter.

Seismograph: Is an instrument that records the seismic waves caused by action of earth quake effect.

What. Is black i will mark as brinelist ​

Answers

Just black?
Well it’s a colour which results from the absence of visible light. In technical sense black and white aren’t colour, but shades however, many people disagree since you combine other pigments to get black. Black is also associated with darkness, evil, despair and night (if it’s Literature related). It’s the darkest shade and it’s an achromatic colour.

simple. black. Is a color and it is dark

What is a major role that fungi play in ecosystems

Answers

Answer:

Fungi play a crucial role in the balance of ecosystems. They colonize most habitats on earth, preferring dark, moist conditions. They can thrive in seemingly-hostile environments, such as the tundra. However, most members of the Kingdom Fungi grow on the forest floor where the dark and damp environment is rich in decaying debris from plants and animals. In these environments, fungi play a major role as decomposers and recyclers, making it possible for members of the other kingdoms to be supplied with nutrients and to live.

Explanation:

Answer from Gauth math

Raw materials required in the autotrophic mode of nutrition involve:​

Answers

Answer:

Water,mineral salts and carbon dioxide

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The picture shows two containers filled with a gas, both initially at room temperature.

Which statement is correct?

The gas particles in both containers have the same average kinetic energy because they have equal number of particles.

The gas particles in both containers have the same average kinetic energy because they have the same volume.

The average kinetic energy of the gas particles is greater in container A because it has a lower temperature.

The average kinetic energy of the gas particles is greater in container B because its particles move faster.

Answers

Answer:

1) CO₂

2) 0.2551 g

Explanation:

The balanced reactions are:

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

MgCO₃ + 2HCl → MgCl₂ + H₂O + CO₂

1) The gas produced is CO₂.

2) Calculate mass of CaCO₃:

(0.5236 g) (0.4230) = 0.2215 g CaCO₃

Convert to moles:

(0.2215 g CaCO₃) (1 mol / 100.1 g) = 0.002213 mol CaCO₃

Find moles of CaCO₃:

(0.002213 mol CaCO₃) (1 mol CO₂ / mol CaCO₃) = 0.002213 mol CO₂

Convert to mass:

(0.002213 mol CO₂) (44.01 g / mol) = 0.09738 g CO₂

Calculate mass of MgCO₃:

(0.5236 g) (0.5770) = 0.3021 g MgCO₃

Convert to moles:

(0.3021 g MgCO₃) (1 mol / 84.31 g) = 0.003583 mol MgCO₃

Find moles of MgCO₃:

(0.003583 mol MgCO₃) (1 mol CO₂ / mol MgCO₃) = 0.003583 mol CO₂

Convert to mass:

(0.003583 mol CO₂) (44.01 g / mol) = 0.1577 g CO₂

Total mass of CO₂:

0.09738 g CO₂ + 0.1577 g CO₂ = 0.2551 g CO₂

Answer:

The average kinetic energy of the gas particles is greater in container B because its particles move faster.

Explanation:

PLEASE HELP ASAP FAST

Answers

Answer:

B.UAA is correct answer

i want some questions on mental health concerns on pandemic based on yes or no please give me questions​

Answers

Answer:

pendemic effect our society and then make many people stress/mental illness. yes or no

Explanation:

question that relate to what you want

Has mental health increased or decreased during the pandemic?
Has mental health become a greater problem since the start of the pandemic?

what is photosynthesis​

Answers

Answer:

The process of making food by Green plants (autotroph) is called photosynthesis. For performing photosynthesis water, sunlight and carbon dioxide are used by the plants.

They take sunlight from sun, water from soil and carbon dioxide gas from the air present around us. The leaves have small holes called stomata which allows air to enter the plant. Leaves also contains chlorophyll in them which traps sunlight and helps in making food. Roots of plants absorbs water and Minerals from the soil and transfers them leaves through stem.

The chemical equation for the photosynthesis

is -

carbon dioxide + water -> glucose + oxygen + energy

[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]

What's photosynthesis?

[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]

Photosynthesis is the process in which green plants derive their food (nutrients and water) through the capturing of light energy (sunlight) and using it to convert carbon dioxide (CO2) and water (H2O) into oxygen (O2) and other substances (compounds) that are rich in energy. Chlorophyll a green pigment present in plants is used in this process.

__________________

Formula ⟶ [tex]\boxed{\bf\:6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2} [/tex]

__________________

So, the products of photosynthesis are [tex]\large\boxed{\boxed{\bf\:C_6H_{12}O_6 + 6O_2}}[/tex]

describe in brief the structure of honeybees​

Answers

Answer:

The body of the honey bee is segmented: stinger, legs, antenna, three segments of thorax and six visible segments of abdomen. The head of the honey bee consists of the eyes, antennae and feeding structures. The thorax of the bee consists of the wings, legs and the muscles that control their movement.

Answer:

The body of the honey bee is segmented: stinger, legs, antenna, three segments of thorax and six visible segments of abdomen. The head of the honey bee consists of the eyes, antennae and feeding structures. The eyes include the compound eye and the simple eye.The thorax of the bee consists of the wings, legs and the muscles that control their movement. 

Which of the following is a type of adaptation that animals can have?

Physical characteristics
Behaviors
Life cycle differences
I and II
I and III
II and III
I, II, and III

Answers

Correct answer is I and II

Answer:

Second option

Explanation:

I and II

Which process involves the body maintaining homeostasis? *​

Answers

An example of homeostasis would be sweating when the temperature is hot.

Which characteristics distinguish a law from a
theory? Check all that apply

Answers

a theory is an idea that has yet to be proven by experimentation. A law is a theory that has been proven correct.

The photic zone Select one: a. has the most nutrients closer to land. b. is an area with sufficient light for photosynthesis. c. has an abundance of photosynthetic organisms. d. is very shallow. e. All of the answer choices are correct.

Answers

the answer for this would be E

The photic zone has the most nutrients closer to land, an area with sufficient light for photosynthesis, has an abundance of photosynthetic organisms, and is very shallow, Thus, the correct option for this question is E, i.e. all of the following.

Where is the photic zone present in the aquatic ecosystem?

The photic zone present in the surface layer of the aquatic ecosystem significantly receives sunlight for photosynthesis. It is the topmost layer that receives sunlight. Hence, this zone is also known as the Sunlight zone.

According to the question, due to the sufficient availability of sunlight, this area performs a good rate of photosynthesis and occupies an abundance of photosynthetic organisms. Phytoplanktons are the characteristic members of this region. As this region has sufficient availability of light, the concentration of nutrients is highly rich.

Therefore,  according to the photic zone, the correct option for this question is E, i.e. all of the following.

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The change that occurs at point C could be caused by Multiple choice question. A) increased predation by wolves. B) a wet year with increased vegetative growth. C) increased competition from moose herds. D) a dry year with decreased vegetative growth.

Answers

Answer:

The answer is "Option B"

Explanation:

A wet season with increased plant growth is indicated by the fact that the population of Elks from beginning point C attained maximum population size (K100) and remained stable until point D. That's why the difference at point C could be due to the a wet year still higher plant growth.

Which is a compound that allows plants to get nitrogen from the nitrogen cycle?

Answers

Answer:

Plants can use ammonia as a nitrogen source. After ammonium fixation, the ammonia and ammonium that is formed will be transferred further, during the nitrification process. Aerobic bacteria use oxygen to convert these compounds.

1. Why is the nitrogen cycle important?

Answers

Answer:

Nitrogen is found in soils and plants, in the water we drink, and in the air we breathe. It is also essential to life: a key building block of DNA, which determines our genetics, is essential to plant growth, and therefore necessary for the food we grow.

Explanation:

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In a mob, all it takes is one dominant and electric individual to convince people to act through the
effect.

Answers

Answer:

Yes.

Explanation:

Yes, In a mob, one dominant and electric individual has the ability to convince people to act through the  effect. This individual is the person who bring these people to fight for their rights and all the people of the mob obeys his orders and he is the only person who can stop these people from causing trouble and violence. All the people in the mob considered him their leaders and follow him in every decision.

explain how typical cells are adapted to their function​

Answers

Answer:

Many cells are specialized. They have structure that are adapted to their function. For eg : muscle cells bring parts of the body together. They contain protein fibres that can contract when energy is available, making the cells shorter.

The period of female fertility during each Month is short For fextilization to take place intercouce must occur each
a) A few hours before ovalation up to 4-5 days after avulation
b) Around 24 hours before ovulation up to around. 24 hours after ovulation
C) Sometimes between 2-3 days before ovulation upto 2-3 days after ovulation
d) Around 4-5 days before ovulation upto a few hours after ovulation
E) Around 4-5 days before ovulation upto 4-5. after ovulation.

Answers

Answer:

The so called fertility window is the days in the menstrual cycle when conception is ... Ovulation usually occurs 14 days prior to your period starting.

Explanation:

It isn't any of your selections but I hope it helped for the choices to decide which one would go to the paragraph I have given

Question 12 of 20
When a substance changes from a solid to a liquid, what happens to the
motion of its particles?
A. They move more slowly and become fixed in position.
B. They move at the same speed but in random directions.
C. They move more quickly and independently.
O D. They move more quickly and begin to move past one another.
SUBMIT

Answers

Answer:

Option C

(You could visualise ice to water for an example)

What is the best description of the word 'Variation' in biology?
O A. Differences between individuals of a species, and between different species.
OB. A large group of completely different items.
C. The differences between different parts of the same organism.
D. Change over time of a species.

Answers

The best description would be A

Variation in biology is best delineate because the variations between people of a species, and between completely different species.

What is Variation?

Variation refers to the variations or deviations from the recognized norm or commonplace. it's going to be a modification in structure, type or operate in associate degree organism, deviating from alternative organisms of identical species or cluster.

In genetic science, variation refers to a personal that possesses characteristics completely different from the others of identical kind. Genetic variation sometimes arises as a mutation sequence that encodes a super molecule or an polymer.

Variations is also mirrored within the composition of the individual, e.g. a distinction in size, color or pattern, or is also detectable solely by deoxyribonucleic acid or super molecule sequencing.

A given variant is also the results of changes during a single sequence, or the consequence of interactions among multiple genes. Populations of identical species living in several components of the globe is also characterized by specific sets of variations.

Variation will, therefore, be measured at the individual level, i.e. variations between individual individuals during a family or population, or at the population level, i.e. variations between populations living in several regions.

The different kinds of variations are:

Environmental factors - Composition variation known as environmental variation.

Inherited factors- The variation passed on from oldsters to offspring, via genes, throughout copy is named heritable variation.

What is Specie?

A species is that the basic unit of classification associate degreed a assortment rank of an organism, furthermore as a unit of variety.

A species is outlined because the largest cluster of organisms within which any 2 people of the suitable sexes or sex activity sorts will turn out fertile offspring, usually by amphimixis.

Other ways in which of shaping species embody

- makeup,

- desoxyribonucleic acid sequence,

- Morphology,

- Behavior or condition.

In addition, paleontologists use the idea of the chrono species since fossil copy can not be examined

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Which of the following iS a possible future milestone in environmental policy?
a.
water pollution policy
b. implementation of a cap and
dividend policy
C.
mandatory environmental assessments
d environmental impact statements

Answers

Answer:

a. water pollution policy

15. Assuming the fluorescence threshold is set to be 1. Which gene has the highest gene expression rate? What is the Ct value? Gene with highest expression = ______________ Ct value = _______________

Answers

Answer:

The correct answer is - Gene 1 and 14.5 (or 14).

Explanation:

The cycle threshold is denoted as Ct value. It is the cross point at the threshold line meets with fluorescence signal reaction curve. In the given RTpcr experiment, the threshold line is fluorescence intensity 1 thus, Ct value for each gene will be the point at which each curve meets the fluorescence intensity line at 1. Ct value of is inversely proportional to amount of nucleic acid in the given sample.

Here, the Ct for gene 1 is the lowest, so the amount of DNA would be highest.

Gene with highest expression= Gene 1

Ct value= 14.5

The large number of alveoli in lungs improve gas exchange by ________. increasing the surface area for diffusion decreasing the distance for diffusion changing the diffusion constant increasing the concentration difference

Answers

Answer:

Explanation:

The large number of alveoli in lungs improve gas exchange by . increasing the surface area for diffusion

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