Help needed in answering science questions.?

Question

1) How is photosynthesis important to living things?
2) Compare the difference between inhaled and exhaled air
3) Compare the respiratory systems in plants and animals..

thank u so much =)

well...precisely..this is called the HOMEWORK HELP section..which means i need ppl to help me by letting me understand it.. n fyi, my textbook don't have all those stuff..

Answer 1

1. The process of photosynthesis is the method by which green plants make food. These plants could not live without this ability. Animals (people) that consume the plants receive the benefit of this process as well. Since animals are incapable of making food, it must be taken in from other sources.
2. Inhaled air has a higher content of oxygen and a lower % of carbon dioxide than the air that is exhaled.

Answer 2

Ans 1) --------

Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen that we absolutely must have to stay alive. Oh yes, we need the food as well!

We can write the overall reaction of this process as:
6H2O + 6CO2 ----------> C6H12O6+ 6O2

Ans 2)---------------

Inhaled air is the air u take inside when u breath and exhaled air is the air u give outside when u leave ur breath
Inhaled air when enters into our body our respiratory system is responsible in making the oxygen content necessary for our body and leave out other gases in the air as exhaled air


The respiratory system main task is to supply oxygen to the blood and getting rid of waste gases. Carbon dioxide is the primary gas that the blood gets rid of. The upper structures of the respiratory system are combined with the sensory organs of smell and taste and the digestive system. When you inhale (breathing in) your skeletal muscle and the diaphragm contract, which then enlarge the chest cavity and cause the lungs to draw in air. This creates a partial vacuum in the thoracic cavity, air passes through the nose, pharynx, larynx, trachea, and then into the two bronchi to the lungs. Oxygen and carbon dioxide pass between the blood and the air in the alveoli, which are at the end of the smallest bronchi. Oxygen diffuses from the inhaled air through the alveoli walls into the capillaries. The lungs contain more than 300 million alveoli. When you exhale or breathe out, your skeletal muscles and diaphragm return to the relax position which decrease the size of the chest cavity and therefore pushes the air out of the lungs. The rib cage serves as a structural support for the whole thoracic arrangement, and peural membranes help provide lubrication for the respiratory organs so that they are not chaffed during respiration. The air we exhale contains 100 times more carbon dioxide than inhaled air. In a resting position a healthy individual will inhale and exhale approximately 16 time per minute.

Ans 3)---------------

Among four-legged animals, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. A diaphragm pulls air in and pushes it out. Respiratory systems of various types are found in a wide variety of organisms. Even trees have respiratory systems.

In humans and other mammals, the respiratory system consists of the airways, the lungs, and the respiratory muscles that mediate the movement of air into and out of the body. Within the alveolar system of the lungs, molecules of oxygen and carbon dioxide are passively exchanged, by diffusion, between the gaseous environment and the blood. Thus, the respiratory system facilitates oxygenation of the blood with a concomitant removal of carbon dioxide and other gaseous metabolic wastes from the circulation. The system also helps to maintain the acid-base balance of the body through the efficient removal of carbon dioxide from the blood.

For more information check out the following web site and if u like rate me as the BEST

http://www.ftexploring.com/photosyn/photosynth.html

http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookRESPSYS.html

Answer 3

1. photosynthesis is important to living things because apart from plants, none of the other living things can perform it. So both human beings and animals depend on the plants to prepare food through photosynthesis.

2. Inhaled air Exhaled air

a] contains more of a] contains more of
oxygen %. carbon di oxide %
b)goes to the lungs b) comes out from the
for purification of lungs after it collect
the blood. CO2.

3. Res. sys. in plants In animals
a)through small pores a) through skin, gills,
called stomata. trachea,nostrils etc.
b) stomatal pores are b) depending upon the
present at the bottom habitat of the animals
the leaf. mode of res. varies.

Answer 4

You know, you should really do your own homework.

I sure you can find those answers in your textbook.

There's a reason why this place is called homework help, not help me do my homework section.

1) Well, what is photosynthesis? Once you know what it is, you can probably guess why it's important to living thing.s

2) You breathe in air and you breathe out air. Why do humans or any other living thing breathe in the first place? There's something in the air which we need to survive. What replaces that thing in exhaled air? Find percentages.

3) Look in your textbook.

Answer 5

1. Photosynthesis helps place oxygen into the air as carbon dioxide is removed from the air.
2. When you inhale, you are taking in oxygen. When you exhale, you are emitting carbon dioxide.
3. Plants take in C02 and put out oxygen. Animals take in oxygen, put out CO2.

Answer 6

1. plants photosynthesize and in the process produces oxygen which is needed for all living things to survive.
2. inhaled air contains a higher amount of oxygen and exhaled air conatins a higher amount of carbon dioxide and water vapour.
im nt sure abt qns 3....

Answer 7

1) it is the way plants make their own food...then everything else depends on the plants...
2)For humans: inhaled air is oxygen (clean air)
exhaled air is carbon dioxide (dirty air)
For plants it is the opposite
3) Animals breathe/need oxygen, plants breathe/need carbon dioxide