What gas is produced by pond weed in the light?
Bright light provides more energy than dim light. Red light is more easily used by the pond weed than most other colours. This process of making sugar and oxygen is called photosynthesis. Pond weed uses the carbon dioxide which is dissolved in the water it is in.
What gas would you expect to find in the bubbles?
However, without a way to determine the chemical composition of the bubbles, it is only an assumption that the bubbles contain oxygen. They might just as well have been bubbles of nitrogen or carbon dioxide, or some other gas from some other process that was occurring in the plants instead of photosynthesis.
What happened to the number of bubbles as the jar was moved farther from the light?
The experiment proved that if the light source was too far away, photosynthesis would be slower and less productive. The procedure was to place Elodea under heat lamps and count the bubbles of photosynthesis in test tubes. A higher count of bubbles showed a higher rate of photosynthesis.
How does light intensity affect the rate of photosynthesis in pond weed?
More oxygen bubbles are produced when the light is closer to the beaker. So a greater light intensity gives a greater rate of photosynthesis.
How can the intensity of light affects the rate of photosynthesis?
As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis. At a very high intensity of light, the rate of photosynthesis would drop quickly as the light starts to damage the plant.
What is the relationship between water light and CO2 and photosynthesis?
Light provides the energy for photosynthetic pigments to convert carbon dioxide (CO2) and water into sugars and oxygen. As light intensity increases Ð until a point Ð the amount of sugars increases and thus, more energy is available for plant growth and maintenance.
What is the relationship between O2 and CO2?
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
What is the relationship between water light and CO2 and photosynthesis quizlet?
Plants need photosynthesis for energy and ultimately to survive. Water and carbon dioxide are reactants for photosynthesis. Chlorophyll captures sun’s light energy and then plants chemically combine this with water and carbon dioxide to make glucose (sugar) and oxygen.
What is the relationship between CO2 and O2 for sea urchins?
CO2, which is waste is released through the anus. They get oxygen only through diffusion, i.e. diffusion of oxygen into the organism. Oxygen diffuses in body through the canals and carbon dioxide diffuses back into the canals. Urchins also have the capability to cope up with rising CO2 levels in the sea.
What are the effects of rising CO2 levels on sea urchins?
(Phys.org) —Increasing levels of carbon dioxide (CO2) in the atmosphere are causing oceans to become more acidic. This situation poses a threat to marine organisms with shells made of calcium carbonate, because acid will corrode these shells.
How do sea urchins digest?
The inside of a sea urchin is dominated by a large, coiled digestive system which consists basically of a tube joining the lower mouth to the anus on the upper surface. In regular echinoids the mouth opens into an oesophagus (oe) that initially runs through the centre of the Aristotle’s lantern.
Can sea urchins survive out of water?
The shingle urchin (Colobocentrotus atratus), which lives on exposed shorelines, is particularly resistant to wave action. It is one of the few sea urchin that can survive many hours out of water. Sea urchins can be found in all climates, from warm seas to polar oceans.
Are sea urchins poisonous when dead?
Yes. Sea urchins have two types of venomous organs – spines and pedicellaria. Spines produce puncture wounds. Contact with sea urchin spines and their venom may trigger a serious inflammatory reaction and can lead to .
What do they do with sea urchins?
The most common way to enjoy sea urchin is by eating it raw, similarly to how one would enjoy oysters or sushi. Adding butter or lemon juice is a great way to enhance the natural flavour. Chefs around the world also use sea urchins as a way to add a unique twist to traditional dishes.
Are all sea urchins safe to eat?
Sea Urchin as Food Like oysters, sea urchins also vary in flavor depending on its species and diet. There are about 950 species of sea urchins… About 18 of them are edible. The green, red, and purple species have the highest demand globally because their lobes tend to be larger and visually more appetizing.