What are three characteristics of alveolus? <3

Answers

Answer 1
1.They give the lungs a really big surface area.

2.They have moist, thin walls (just one cell thick)

3.They have a lot of tiny blood vessels called capillaries.

Related Questions

The last woman scientist discovered one gene that is unique in human, and she called it an Eureka moment. How many letters are different in that gene if you compare the chimp version with the human version

Answers

Only one letter is different between the human gene and the chimpanzee gene.

What is a gene?

A gene is a term to refer to the molecular unit of genetic inheritance that is composed of deoxyribonucleic acid, that is,

A sugar group. A phosphate group. A nitrogenous base. Guanine (G) Cytokine (C) Thymine (T) Adenine (A)

Man and chimpanzee share 99% of their genes. However, there are important genetic differences for us to be a different species from chimpanzees. Well, the change of a single nitrogenous base and differentiates the gene of a chimpanzee from the gene of a human.

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Which characteristic of living organisms is similar to burning fuel in a car engine

Answers

Answer:

im sorry but there isnt engough information for me to answer this properly

Chemical energy, or in other words using an energy source to fuel us. Cars have gas, that’s what makes them “go”. We eat food, this is what makes us “go”.

Do you think the vacuum hose is an effective way to remove sea urchins? Why? Explain at least one way this technology can be improved.

Answers

Answer:

No, or at least not yet. there small and dont do much improvment. If they were much bigger and sucked better, including some touch-ups here and there, they would have a bigger effect on removing sea urchins.

Explanation:

No

vaccum hoses are quite small in size.They don't suck sea urchins as per requirement.If they would be bigger and have more sucking power then it can be yes.

what are the 2 parts of the central nervous system

Answers

Answer:

brain and spinal cord.

Explanation:

The two parts of the central nervous system are the brain and the spinal cord.

How does a plants structure contribute to its ability to perform photosynthesis

Answers

Answer: 1. Leaves have a large surface area; this allows them to absorb more sunlight. They are also thin, meaning that carbon dioxide has a shorter way to travel.

                2. stomata allow the entrance of carbon dioxide. The more complex adaptations are of the internal leaf structure.

PLEASE HELP!! MULTIPLE CHOICE

Answers

genes control traits so when a gene is changed the trait changes

A

The answer should be A and C

many protists are single-celled organisms. which other characteristic is common to organisms in kingdom protista?

Answers

They are neither plants nor animals. They fall in the dustbin kingdom.

All of the following are true of hospitals in the United States, except: _____________

a. the average length of stay has declined substantially in recent decades.
b. the percentage of hospital services provided to outpatients has increased substantially in recent decades.
c. hospitals are owned and operated as governmental or not-for-profit institutions, but they are not owned by for-profit corporations.
d. hospitals receive a greater percentage of the healthcare dollar than any other healthcare institution.

Answers

There are different kinds of Healthcare system. The true statement about hospitals in the United States is that Hospitals are owned and operated as governmental or not-for-profits institutions but they are not owned by for-profit corporations.

U.S. Healthcare coverage is known to be divided into 2 part. They are;

Public healthcare (government-funded) Private healthcare (privately-funded)

Hospitals often offer basic care to the sick. They treat illness and do simple surgery. Their work includes removal of gallstones etc. The hospitals are not set up to make profit but too help people.

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History of the 1918 flu pandemic In 7 Minutes Compare (how is it similar to covd?) and Contrast (how is different from covd?).​

Answers

Answer:

anwser in explanation

Explanation:

It is similar to covd because of the masks and because of the deaths and the quarantine

How to pronounce punnet squares?

Answers

Answer: puh-net

Explanation:

e. How would the sky look if we could see microwaves in space?

Answers

Weird and the goverment would take them to study and wonder how they got there and people would be praising them (just a guess)

how is the dna in a prokaryotic different from a eukaryote?

Answers

eukaryotic cells have excessive linear chromosomes, while prokaryotic cells have only one chromosome.

Look at the table for energy used in activities. Ella does 2 hours of dancing a week, plays football for 1 hour a week, and goes swimming for 0.5 hours a week. She has a mass of 55kg. How much extra energy will she need a week in order to do these activities?

Answers

Ella requires 3905 kJ of energy to do 2 hours of dancing a week, 1 hour of football a week, and 0.5 hours of swimming a week.

Ella, with a mass of 55 kg, does a series of activities in a week.

Let's calculate how much energy she needs for each activity in total.

Dancing

Ellas does 2 hours of dancing a week, which consumes 18 kJ/kg.h.

2 h × 55 kg × 18 kJ/kg.h =  1980 kJ

Football

Ella plays 1 hour of football a week, which consumes 25 kJ/kg.h.

1 h × 55 kg × 25 kJ/kg.h =  1375 kJ

Swimming

Ella goes swimming for 0.5 hours a week, which consumes 20 kJ/kg.h.

0.5 h × 55 kg × 20 kJ/kg.h =  550 kJ

Total energy expenditure

E = 1980 kJ + 1375 kJ + 550 kJ = 3905 kJ

Ella requires 3905 kJ of energy to do 2 hours of dancing a week, 1 hour of football a week, and 0.5 hours of swimming a week.

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What is the correct sequence in the transmission of a neural impulse?

Answers

Answer:

A nerve impulse begins when a neuron receives a chemical stimulus. The nerve impulse travels through the axon membrane as an electrical action potential to the axon terminal. The axon terminal releases neurotransmitters that carry the nerve impulse to the next cell

Explanation:

and i'm mexican

I need some help pls
1what is the function of an enzyme


2 how are proteins made

Answers

the proteins are made up of fat

What type of food was discovered to make up the majority of the diet of human foragers (and, by extension, likely our ancient ancestors)

Answers

Plant foods such as nuts, fruits and roots was discovered to make up the majority of the diet of human foragers. Hominine ancestors depended on foraging.

Hominine ancestors (i.e., before the evolution of H. sapiens), depended on foraging for millions of years.

Foraging refers to the search for wild food resources, which are provided by nature by gathering different sources (e.g., plants, small animals, birds, insects, etc).

Nuts, fruits and roots represent excellent sources of food because they contain both macronutrients (lipids, proteins and carbohydrates) and micronutrients (i.e., minerals and vitamins).

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The gravitational pull between two objects depends on their mass and distance. What is meant by distance?
1 point)

A. How close the two objects are located, meaning that closer objects have a stronger
gravitational pull than objects farther apart.

B. The height of an object above the ground, meaning that an object will fall faster as the
height above the ground increases.

C. How far apart the two objects are located meaning that objects farther apart have a
stronger gravitational pull than closer objects.

D. The length of the object, meaning if the object is longer it will exhibit more gravitational pull
than if it is short.

Answers

The Answer is B because distance in that question refers to the distance from the object to the center of the earth

a chromosome is best described as a _____________


a. gene that has more than one form

b. green cell found in many plants

c. strand of DNA containing genetic information

d. reproductive cell found in certain kinds of bacteria

Answers

Answer: the answer is C

The answer would be C

renewable energy makes up approximately how much of the total u.s. energy budget?

Answers

Answer:9.2 quadrillion BTU

Explanation:

Energy flow through an
ecosystem is
A. completely random
B. a one-way pathway
C. always towards the Sun
D. a dual-directional pathway

Answers

Energy flow is the flow of energy through
living things within an ecosystem. All living
organisms can be organized into producers
and consumers, and those producers and
consumers can further be organized into a food
chain. Each of the levels within the food is a trophic level.

__________ is needed in the body to make vitamin D, bile acids, and cortisol. Group of answer choices Phospholipid Cholesterol Lipase Triglyceride

Answers

Explanation:

Cholesterol is the correct answer

NEED HELP ASAP PLZ

Write T or True if the statement is true; write For False if the statement is false.
1. The greenhouse effect is a natural process that supports life on the earth for millions
years.

2. The majority of the Earth's atmosphere is composed of nitrogen and oxygen,
greenhouse gases comprise only a tiny fraction of the atmosphere.

3. All greenhouse gases are created as a result of human activity.

Answers

Answer:

1.)True

2.)False

3.)True

Explanation:

that's all I can give

in what part of the body does most chemical digestion take place?

Answers

Answer:

the small intestine

Explanation:

Which statement is true of evergreen coniferous trees?

Answers

Answer:always green and pinecones

Explanation:

Human cells have 46 chromosomes. Each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere. Once the chromosome has split, each chromatid is called a daughter chromosome. At the end of cytokinesis, how many daughter chromosomes will be found in each cell? Explain.

Answers

Answer:

92 daughter chromosomes.

Explanation:

There are 46 chromosomes in a normal cell and each chromosome turns into 2 daughter cells. So 46 plus 46 is 92.

For the question we've all been waiting for: Did the chicken or the egg come first?

Answers

Answer:

had to have been something mutated into a chicken right?

in the family the father is affected by a genetic disorder the son in the family has the same disease but the daughters do not have it. what type of inheritance is this ?

Answers

Answer:

Explanation:When a genetic disorder is diagnosed in a family, family members often want to know the likelihood that they or their children will develop the condition. This can be difficult to predict in some cases because many factors influence a person's chances of developing a genetic condition. One important factor is how the condition is inherited.

8. Fish make use of _______ exchange in their gills. a. cross-current b. concurrent c. cocurrent d. countercurrent

Answers

Answer:

Countercurrent

Explanation:

I think it's the answer

Answer:

d. countercurrent

Explanation:

im pretty sure this the answer so i hope this helps bro/broette bye

Which THREE statements describe how the models of mitosis and meiosis demonstrate genetic continuity?


Chromosomes are divided up evenly during Anaphase (Anaphase I of meiosis), ensuring that the daughter cells will have the correct number to reproduce.


In Interphase the chromosomes have duplicated, indicating that there will be enough genetic material to separate into daughter cells capable of reproduction.


In Prophase (Prophase I and II of meiosis) the spindles form, indicating that the chromosomes will be split evenly, and the daughter cells will receive the appropriate amount of genetic material.


In Metaphase (Metaphase II of meiosis) the chromosomes are lined up properly, indicating that the chromatids will separate evenly and provide the daughter cells with equal amounts of genetic material.


In Telophase (Telophase II of meiosis) the amount of chromatin present is equal to the amount present during Interphase, indicating that the daughter cells will receive the same amount of genetic material as the parent cell.

Answers

Answers: A,B,D

Explanation: :I took the test and got this question right .

The three statements that describes how the models of mitosis and meiosis demonstrate genetic continuity are listed and explain below.

In Anaphase, chromosomes line up in the middle of the cell while the spindle fibres pulls them apart.

Therefore the statement below about anaphase is correct.

Chromosomes are divided up evenly during Anaphase (Anaphase I of meiosis), ensuring that the daughter cells will have the correct number to reproduce.

In interphase, the synthesis of DNA occurs where the chromosomes replicates forming two identical copies of DNA.

That is, the cell now has 92 chromosomes which is enough DNA for two cells.

Therefore the statement below about interphase is correct.

In Interphase the chromosomes have duplicated, indicating that there will be enough genetic material to separate into daughter cells capable of reproduction.

In the prophase, the mitotic apparatus appears; this consists of two centrioles separated by the mitotic spindle which is formed from microtubules.

The formation of these mitotic spindle fibres indicates that the chromosomes will be split evenly.

Therefore the statement below about prophase is correct.

In Prophase (Prophase I and II of meiosis) the spindles form, indicating that the chromosomes will be split evenly, and the daughter cells will receive the appropriate amount of genetic material.

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The genetically programmed death of cells is called:

Answers

Answer:

Apoptosis :)

Explanation:

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