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
C.
Juicy aril
The edible part of the fruit of litchi is juicy aril. Aril is an accessory seed covering formed by an outgrowth at the base of the ovule.
Pericarp is the part of a fruit formed from the wall of the ripened ovary.
Mesocarp is the middle layer of the pericarp of a fruit, between the endocarp and the exocarp.
Endocarp is the innermost layer of the pericarp which surrounds a seed in a fruit. It may be membranous or woody.
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
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