In a photosynthetic reaction, how many moles of oxygen molecule is produced when 8400 kJ of energy from the sun is used up?

Carbon tetrachloride and ethanol (ethyl alcohol) are individually toxic to the liver, but together they produce much more liver injury than the sum of their individual effects on the liver. This is an example of ___________.

Identify the different abiotic components within the picture given.

Detritus feeders work with microbial decomposers to destroy dead organisms and wastes products.

In a terrestrial setting, what organism is at the highest trophic level.

They play a very important role in the environment due to their capability to breakdown complex substances ready for reuse and recycle of important chemical nutrients necessary to sustain ecological interactions.

The intersection point of the Earth's three physical environments, where biotic and abiotic interaction happens.

Using the rule of thumb that 10% of the energy consumed is used in the production of biomass, calculate the LEAST possible amount of energy consumed by the frog through the food chain depicted in the figure, assuming that the Berries/Plantain contains 1000 joules of energy.

The following are factors affecting the toxicity of a certain chemical except:

Omnivores may be considered as either primary, or secondary/tertiary consumers.

It shows how organisms and their food chains are represented in various complex relationships.

The absence of energy from the sun during the night is not a hindrance to producers to sustain their biological processes. They undergo the so called aerobic respiration where a particular chemical oxidized to form carbon dioxide, water and energy. What is/are this/these chemical compound/s?

Typically, mercury is taken up by bacteria and phytoplankton. Small fish eat the bacteria and phytoplankton and accumulate the mercury. The small fish are in turn eaten by larger fish, which can become food for humans and animals. This situation can describe the phenomenon called ______________.

Inhalation of certain acid vapours at concentrations may, over long periods of time, cause loss of tooth enamel, eventually leading to extensive tooth decay. This is an example of...

As energy flows through the food chain, it is converted to heat and is lost as useful nutrient.

Conversion of organic nitrogen to ammonium/ammonia nitrogen.

Growth-limiting nutrient of organisms.

Enzyme that speeds up the oxidation of hydrogen sulfide converting it to sulfuric acid.

While insulin lowers blood sugar, glucagon raises it. Thus, regulating the major physiological function of these two chemicals is crucial in order to keep up a healthy level of glucose in blood. This is an example of ___________.