What is BioNinja?
BioNinja is a whimsical educational site that provides review material for the IB Biology exams (both the standard-level and high-level tests).
Who is the author of BioNinja?
Brent Cornell
What is IB Biology?
The IB Diploma Programme biology higher level course covers the relationship of structure and function at all levels of complexity. Students learn about cell theory, the chemistry of living things, plant science and genetics, among many other topics to further their understanding of and learning about biology.
What is photosynthesis IB?
Photosynthesis (2.9) IB Diploma Biology Essential Idea: Photosynthesis transforms light energy into chemical potential energy that can be used by organisms. 2.9.1 Photosynthesis is the production of carbon compounds in cells using light energy.
What will happen if you remove the air from these spaces answers?
In the cells of the leaf, you find air spaces where the stoma is located. The stoma allows for carbon dioxide to come in, and oxygen to go out. What will happen if you remove the air from these spaces? The leaves will sink because they become more dense than water and cannot carry out photosynthesis.
What is the function of a stomata?
Stomata, the small pores on the surfaces of leaves and stalks, regulate the flow of gases in and out of leaves and thus plants as a whole.
What are the 3 functions of stomata?
“Functions of Stomata:
- The main function of stomata is to open and close the pores in the leaves for an exchange of gases.
- It allows the plant to take in carbon dioxide and give out oxygen for photosynthesis.
- Based on the weather conditions, it closes or opens its pores to keep the moisture content developed.
What are the two main functions of stomata?
Stomata have two main functions, namely they allow for gas exchange acting as an entryway for carbon dioxide (CO2) and releasing the Oxygen (O2) that we breath. The other main function is regulating water movement through transpiration.
What are the two major functions of stomata?
Functions of the stomata They allow the exchange of gases (CO2 and O2) with the atmosphere. Evaporation of water from the leaf surface occurs through the stomata. Thus, the stomata help in the process of transpiration. Based on the climatic conditions, it closes or opens its pores to maintain the moisture balance.
What are stomata very short answer?
Stomata are small pores present in the leaf. They are surrounded by gaurd cells which help in closening and opening of stomata. 1)They allow exchange of gases from the surrounding medium. Usually, carbon dioxide is taken up and oxygen is released.
What is the function of chlorophyll?
Chlorophyll’s job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.
What causes opening and closing of stomata?
During transpiration the movement of potassium ions in and out of the guard cells causes the opening and closing of stomata. Due to this the water potential in the guard cells decreases and water moves inside the guard cells causing them to swell up and become turgid which in turn causes the opening of stomata pores.
Which hormone is responsible for opening and closing of stomata?
abscisic acid
Under what conditions would the stomata be closed?
At night, the stomata close to avoid losing water when photosynthesis is not occurring. During the day, stomata close if the leaves experience a lack of water, such as during a drought. The opening or closing of stomata occur in response to signals from the external environment.
When stomata open what occurs?
When stomata are open, water vapor and other gases, such as oxygen, are released into the atmosphere through them. A number of factors can affect the exchange of gases between a leaf and the atmosphere.
Why do plants need to open their stomata?
The two main functions of stomata are to allow for the uptake of carbon dioxide and to limit the loss of water due to evaporation. In many plants, stomata remain open during the day and closed at night. Stomata are open during the day because this is when photosynthesis typically occurs.
Why do stomata open?
The stomata is a structure in a plant cell that allows water or gases to be let into the plant. Stomata are open during the day because this is when photosynthesis typically occurs. Opening and closing of stomata occur due to turgor changes in guard cells.
What will happen if there is no stomata in leaves?
There will be no gas exchange. No carbon dioxide will move into the plant and there will not be any photosynthesis. The leaves wont get water and won’t photosynthesis. …
What happened to the food in the stomata?
The carbon in the glucose formed during photosynthesis, comes from CO2 taken by the plant through stomata. Therefore if stomatal pores will be covered, then there will be decline in the process of photosynthesis and ultimately the plant will die due to absence of nutrients.
Which plant has no stomata?
Hydrophytes
How do photosynthesis and cellular respiration differ?
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
What type of cellular respiration requires oxygen?
Aerobic
Does cellular respiration produce carbon dioxide?
During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.
Why is respiration called the reverse of photosynthesis?
In respiration oxygen is involved, carbon dioxide is released and occurs all the time of day whereas in photosynthesis oxygen is released, carbon dioxide is involved and occurs in the presence of sunlight. Therefore, spiration is said to be the reverse of photosynthesis.
Is respiration the reverse of photosynthesis?
This process – the reverse of photosynthesis is known as respiration. During respiration, sugar is broken down in a chemical reaction with oxygen. The end products of the respiration reaction are the smaller compounds of carbon dioxide and water.
Why is it usually difficult to demonstrate respiration in green plants?
It is difficult to demonstrate the respiration process in plants because the carbon dioxide released during respiration is utilised in the photosynthesis process. So we can not demonstrate the release of carbon dioxide in respiration during sunlight.
Why is photosynthesis considered one of the most important biological process on Earth?
Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die.
Can photosynthesis happen without sunlight?
Plants need light to photosynthesize, but it doesn’t necessarily have to be sunlight. If the correct type of artificial light is used, photosynthesis can happen at night with lights that contain blue and red wavelengths.
How do humans benefit from photosynthesis?
Photosynthesis provides us with most of the oxygen we need in order to breathe. Plantshelp humans survive by giving out carbon dioxide to oxygen through a process called photosynthesis that helps us to breathe.
What are two main reasons Photosynthesis is considered the most important chemical reaction on Earth?
Photosynthesis is the process by which organisms convert light energy into chemical energy. The energy stored in organic molecules by photosynthesizers is the fuel of life for most living things and the oxygen released during photosynthesis makes cellular respiration—and therefore life—possible on earth.