Which of the following does not occur during photosynthesis?

• Energy from sunlight is absorbed

• Carbon dioxide is evolved

• Glucose is synthesized

• Oxygen is given off

Even though some flowering plants contain accessory pigments which give them colours,they still contain the pigment________

• Melanin

• Chlorophyll

• Xanthophyll

• Carotene

Which of the following is not regarded as a micro nutrient or trace element essentially for plant growth?

• Phosphorus

• Zinc

• Boron

• Silicon

In a water culture experiment, a plant showed poor growth and yellowing of leaves. These symptoms were probably due to the absence of -----------

• Calcium

• Phosphorus

• Iron

• Zinc

The relationship between a herbivore and bacteria which lives in the caecum is known as ------

• Parasitism

• Symbiosis

• Commensalism

• Saprophytism

Autotrophic nutrition maybe defined in terms of food obtained --------

• from other organisms in exchange for some products

• by the breakdown of complex substances

• by an organism utilizing its own store of energy

• by synthesizing simple substances using energy from an external source

In photosynthesis, the following processes are part of the light reaction except -------

• transfer of radiant energy which reduces a co-factor

• absorption of radiant energy by chlorophyll

• utilization of energy in the electron transfer chain from ATP

• formation of glucose using energy from NADPH

An association between living organisms in which one lives on and feeds at the expense of the other organism is known as -------

• parasitism

• commensalism

• symbiosis

• predation

Thunderstorm can be beneficial to plants because it -----------

• kills the pests that attacks crops

• destroys some of the major crops

• adds nitrates to the soil

• makes rain water available to plants

Which of the following is a nitrifying bacteria?

• Nitrobacter

• Rhizobium

• Azotobacter

• Nitrosomonas