What part of the lower respiratory tract is made up of tiny air sacs where oxygen and carbon dioxide are exchanged? a. Bronchioles b. Larynx c. Alveoli d. Trachea

QUESTION POSTED AT 18/01/2020 - 03:11 AM

Related questions

Earth receives thermal energy from the sun via radiation. Which of the following is a result of this energy transfer?A. There is matter to produce carbon compounds on Earth.B. Earth is a closed system in terms of energy.C. There is energy to support life on earth.D. Energy is created but not destroyed in the earth system

Answer: C. There is energy to support life on earth.

The earth receives thermal energy from the sun via. radiation. This energy is captured by chlorophyll pigments of plants and other organisms to conduct photosynthesis. The sunlight energy is necessary for synthesis of food in the form of glucose. The glucose is converted into chemical form of energy as ATP which is required for respiration process in plants. Photosynthesis and respiration both are necessary processes to sustain life of plants, which further support life of other living organisms. Therefore, energy transfer support life on earth.  

ANSWERED AT 19/02/2020 - 10:14 AM


QUESTION POSTED AT 19/02/2020 - 10:14 AM

Are viruses considered nonliving because they're are not made of protein

No. Firstly, viruses do contain protein capsids, in which DNA or RNA is contained.


To answer your question, viruses are considered non-living, because the only characteristic they exhibit, usual to the living organism, is multiplication. And that's about it. They cannot breathe, eat and so on. 

ANSWERED AT 19/02/2020 - 12:38 AM


QUESTION POSTED AT 19/02/2020 - 12:38 AM

Explain why convection happens more effciently in water or air than it does in rock

First of all, convection is the transfer of energy due to the movement of matter. 
Convection occurs more efficiently in water or air because particles in water and air move more freely than in rock. The more moving particles there are, the more energy transfer occurs. 

ANSWERED AT 19/02/2020 - 12:15 AM


QUESTION POSTED AT 19/02/2020 - 12:15 AM

which polypeptide chain will be made during translation of the following DNA sequence. (everything you need is in the picture)

The answer is: arg-ile-arg-tyr

ANSWERED AT 18/02/2020 - 11:40 PM


QUESTION POSTED AT 18/02/2020 - 11:40 PM

Which gas is a source of natural groundwater pollutionim thinking its carbon

Radon gas is a radioactive product of he decay of naturally occurring uranium in the earths crust

Carbon is also naturally polluting

And natural gas and propane also pollute

ANSWERED AT 18/02/2020 - 11:38 PM


QUESTION POSTED AT 18/02/2020 - 11:38 PM

What part of the cell theory explains why organisme grow?

The third part of the cell theory surely explains how organisms grow, but unfortunately not why. It says that every living cell originates as a result of the division of a preexisting cell and no cell can spontaneously self-assemble as it was believed till the middle of the 19th century according to the anomalous generation theory.

ANSWERED AT 18/02/2020 - 11:36 PM


QUESTION POSTED AT 18/02/2020 - 11:36 PM

What are roots made of?

Roots are made of epidermal cells

ANSWERED AT 18/02/2020 - 04:34 PM


QUESTION POSTED AT 18/02/2020 - 04:34 PM

The red spheres represent oxygen atoms, and the blue spheres represent hydrogen aroms is this substance a compound

Answer:

Yes, compounds are molecules that are formed by different elements, water is formed by oxygen and hydrogen atoms, so yes

ANSWERED AT 18/02/2020 - 02:56 PM


QUESTION POSTED AT 18/02/2020 - 02:56 PM

What is the main purpose of oxygen of glucose in the body?

Oxygen is required for aerobic respiration. This reaction produces ATP (universal currency for energy) which our bodies use to survive. Without oxygen much less ATP is produced, as aerobic respiration cannot occur in the lack of oxygen. ATP can be formed by anaerobic respiration, in the lack of oxygen, but this produces far far fewer molecules of ATP. This also produces lactic acid causing us to become fatigued and tired. Thus oxygen is crucial to produce the maximum amount of ATP possible.  

Glucose is the main molecule which is respired by our bodies to produce ATP/ energy, which our bodies use to survive. Oxygen and glucose react in the mitochondria to make ATP (release energy.) It therefore, is called a respiratory substrate.

Note: I'm avoided talking about the exact phases of respiration as it is usually not covered till college/ A level standards. If you would like to know exactly which reaction requires oxygen and how it's used (i.e. the stages of respiration) don't hesitate to ask. 

ANSWERED AT 18/02/2020 - 02:52 PM


QUESTION POSTED AT 18/02/2020 - 02:52 PM

What allows glycolysis to continue without oxygen?

Fermentation, the process of getting energy when low on or no oxygen. The two types are alcoholic and lactic acid fermentation. 

ANSWERED AT 18/02/2020 - 02:50 PM


QUESTION POSTED AT 18/02/2020 - 02:50 PM

A green plant absorbs a toxic substance that completely blocks the production of ATP. How would this most likely affect the dark reactions? A - The dark reactions would stop happening. B - The dark reactions would produce more NADPH C - The dark reactions would continue to produce oxygen D - The dark reactions would produce more carbon dioxide

Answer:

The most appropriate answer would be  A - The dark reactions would stop happening.

Light-independent or dark reaction or Calvin cycle is a part of photosynthesis in which products of light-dependent reaction (ATP and NADPH) are used to fix carbon from carbon dioxide into glucose.

It takes around 9 molecules of ATP and 6 molecules of NADPH in order to produce 1 molecule of glucose.

So, if ATP production would be stopped in a plant then dark reaction would also stop happening.

ANSWERED AT 18/02/2020 - 02:33 PM


QUESTION POSTED AT 18/02/2020 - 02:33 PM

As water soaks through the ground , it first passes through a rock layer that has pores that are mostly filled with air . What is this zone called ? A) zone of saturation B) zone of premeability C) zone of porosity D) zone of aeration

As water soaks through the ground , it first passes through a rock layer that has pores that are mostly filled with air The Zone is called zone of aeration.

ANSWERED AT 18/02/2020 - 02:29 PM


QUESTION POSTED AT 18/02/2020 - 02:29 PM

1. Which of the following sets of terms could be used in a description of the peripheral nervous system? A. motor neuron, interneuron, sensory neuron B. brain, sensory neuron, myelin C. interneuron, spinal cord, autonomic D. somatic, brain, spinal cord 2. Which of the following is not a function of the human nervous system? A. regulating heartbeat B. listening to music C. moving oxygen from air into the blood D. signaling the diaphragm to contract 3. Which of the following correctly describes how nerve impulses move throughout the body? A. electrical trans

Q1. The answer is A. motor neuron, interneuron, sensory neuron

Sensory neuron receives signals from the environment and sends it to the central nervous system. Interneuron is the part of the central nervous system, it is found in the spinal cord where is involved in reflex action. In those reflex actions, the signal from sensory neuron is sent to interneuron and it sends it back to motor neuron which sends the signal to the effectors. In reflex actions signal is not sent to the brain because immediate reaction is necessary.


Q2. The answer is  
C. moving oxygen from air into the blood

The central nervous system is involved in 
regulating heartbeat, listening to music, signaling the diaphragm to contract. However, it is not involved in moving oxygen from air into the blood. Circulatory and respiratory systems are responsible for moving oxygen from air into the blood.

ANSWERED AT 18/02/2020 - 02:29 PM


QUESTION POSTED AT 18/02/2020 - 02:29 PM

What structure serves as a passageway for both air and food? A. pharynx B. trachea C. larynx D. bronchus

pharynx tructure serves as a passageway for both air and food, this quality of pharynx make them different from the rest of the options.

ANSWERED AT 18/02/2020 - 02:27 PM


QUESTION POSTED AT 18/02/2020 - 02:27 PM

Which of the following is a possible cost of using renewable resources? a. loss of animal species b. land degradation c. lower availability of freshwater d. all of the above

all of the above are a possible cost of using renewable resources, though loss of animals species is a negative factor but still it counts.

ANSWERED AT 18/02/2020 - 02:27 PM


QUESTION POSTED AT 18/02/2020 - 02:27 PM

Some of the sedimentary rock called ______ is made from ancient coral reefs buried by sediments.

Answer:

Limestone

Explanation:

Limestone can be termed as biochemical substance as it is majorly made up of skeletons of long dead animals and calcite.

ANSWERED AT 18/02/2020 - 02:14 PM


QUESTION POSTED AT 18/02/2020 - 02:14 PM

During reduction, 3-PGA reacts with ATP and NADPH. What does ATP contribute to the reaction? carbon hydrogen ions electrons phosphate group

Answer:

The correct answer would be electrons.

It is the second step of Calvin cycle that is, reduction.

During this process electrons from ATP and NADPH are transferred to 3-phosphoglyceric acid (3-PGA). It gets reduced to form glyceraldehyde-3-phosphate (G3P).

The overall reaction is represented below.

ANSWERED AT 18/02/2020 - 02:01 PM


QUESTION POSTED AT 18/02/2020 - 02:01 PM

An increase in carbon dioxide in the atmosphere will most effect which type earth activity?

An increase in carbon dioxide in the atmosphere will most effect "Photosynthetic Activity"

Hope this helps!

ANSWERED AT 18/02/2020 - 01:34 PM


QUESTION POSTED AT 18/02/2020 - 01:34 PM

Pat wants to observe mitotic cell division in an onion plant. Which part of the plant body is most suitable for this activity and why?

Answer - Root Tip

Reasoning - The root tip can be a good place to observe and get cells at any given time since it's the place where cells and roots will keep growing under mitosis.

ANSWERED AT 18/02/2020 - 01:14 PM


QUESTION POSTED AT 18/02/2020 - 01:14 PM

Several adaptations have made land animals very successful. List as many adaptations as you think of that made life on land possible.

It is vital to your understanding of this topic that you remember life on Earth was largely water-based and these aquatic creatures had to undergo adaptations and evolution over millions of years of transition to make the conversion to life on land possible. Animals had to develop lungs in addition to or replacing gills that could breathe air and extract the oxygen from that rather than the water. They also had to develop feet to replace their fins. Animals also had to be able to adjust to wide ranges of temperature on land that they didn't experience in the water, thus they developed different forms of heat protection. Mainly, animals had to develop a respiratory system that could handle the increase of oxygen, feet/legs that were suited to land rather than water, and stronger bodies that were rigid and could withstand high/low temperatures, terrestrial predators like those of vertebrates and arthropods, that were the animals first able to live on land.  

ANSWERED AT 18/02/2020 - 12:43 PM


QUESTION POSTED AT 18/02/2020 - 12:43 PM

From which structures do oxygen molecules move from the lungs to the blood? a. Bronchi b. Trachea c. Nose d. Bronchioles e. Alveoli Follow

Alveoli the oxygen molecules move from lungs to blood

ANSWERED AT 18/02/2020 - 12:15 PM


QUESTION POSTED AT 18/02/2020 - 12:15 PM

Light travels fastest through A. air. B. water. C. metal.

It would be air so a

ANSWERED AT 18/02/2020 - 12:04 PM


QUESTION POSTED AT 18/02/2020 - 12:04 PM

Which of these is a common component of air pollution? A. nitrogen B. carbon dioxide C. insecticides D. herbicides

B.) Carbon dioxide!

but get a second opinion on this!


Good luck!!

ANSWERED AT 18/02/2020 - 11:33 AM


QUESTION POSTED AT 18/02/2020 - 11:33 AM

Put the following parts of the ocean floor in order from least to greatest depth: abyssal plain, continental shelf, mid-ocean ridge, trench, continental slope.

Answer:

From the least depth to the greatest depth, the following features are arranged-

(1) Continental Shelf

(2) Continental Slope

(3) Continental Rise

(4) Abyssal Plain

(5) Mid Oceanic Ridge

(6) Trench

Explanation:

Continental shelf- It is the top portion of the ocean floor, which ranges from the edge of the continent up to a depth of about 200 meters.

Continental slope- It is the second portion of the ocean layer that ranges from a depth of about 200 meters up to about 2000 meters.

Continental rise- It is present below the continental slope and here it slightly rises ranging in depth from about 2000 to 4000 meters below the mean sea level.

Abyssal plain- It lies below the Continental rise, extending from about 4000 to 6000 meters below the sea level.

Mid oceanic ridge- It forms the deeper portion of the ocean floor, extending from about 6000 to 8000 meters below the sea level.

Trench- It forms the deepest portion of the ocean body where sunlight cannot reach. It is dark and ranges its height from about 8000 meters and beyond that.

ANSWERED AT 18/02/2020 - 10:44 AM


QUESTION POSTED AT 18/02/2020 - 10:44 AM