The most important force which pulls water up in tall trees is

• imbibition force

• osmotic force

• cohesive force

• electromagnetic force

The amphibians of plant kingdom are

• algae 

• bryophytes

• thallophytes 

• floating plants

The law of limiting factors for photosynthesis was enunciated by

• R. Hill

• Calvin

• Krebs

• Blackman

Who said that 'transpiration is a necessary evil'

• Curtis

• Andersen

• Steward

• J.C. Bose

Transpiration would be lowest when

• wind velocity is high

• enough water is in the soil

• atmospheric RH is high

• high temperature and light

Which of the following exhibits a direct porportionality to transpiration

• Light and RH

• Temperature and RH

• Temperature and wind

• RH and wind

Water in plants is transported by

• cambium

• phloem

• xylem

• epidermis

The light phase of photosynthesis is called

• Hill reaction

• photo action

• pigment action

• chlorophyllous process

The plant Cuscuta shows maximum photosynthesis in

• red light

• blue light

• green light

• no photosynthesis at all

The incomplete breakdown of sugars in anaerobic respiration results in the formation of

• fructose and water

• glucose and CO₂

• alcohol and CO₂

• water and CO₂