Which ofthe following is not true for a species?

• Members of a species can interbreed

• Variations occurs among members of a species

• Each species is reproductively isolated from every other species

• Gene flow does not occur between the populations of a species

One of the most important functions of botanical gardens is that

• one can observe tropical plants there

• they allow ex situ conservation of germplasm

• they provide the natural habitat for wild life

• they provide a beautiful area for recreation

During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?

• Conversion of pyruvic acid to acetyl Co-A

• Electron transport chain

• Glycolysis

• Krebs cycle

Ectophloic siphonostele is found in

• Adiantum and Cucurbitaceae

• Osmunda and Equisetum

• Marsilea and Botrychium

• Dicksonia and maiden hair fem

Which of the following represents the edible part of the fruit of litchi?

• Pericarp

• Mesocarp

• Juicy aril

• Endocarp

Carbohydrates, the most abundant biomolecules on earth, are produced by:

• all bacteria, fungi and algae

• fungi, algae and green plant cells

• some bacteria, algae and green plant cells

• viruses, fungi and bacteria

The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport ?

• Cu, Mn, Fe

• Co, Ni, Mo

• Mn, Co, Ca

• Ca, K, Na

38.

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on 

• proton gradient

• accumulation of K ions

• accumulation of Na ions

• membrane potential

Which one of the following pairs is mismatched?

• Savanna - Acacia trees

• Prairie - Epiphytes

• Tundra - Permafrost

• Coniferous forest - Evergreen trees

Potometer works on the principle of

• amount of water absorbed equals the maount transpired

• osmotic pressure

• root pressure

• potential difference between the tip of the tube and that of the plant