Two other major groups of flavonoids found in flowers and leaves of all green plants. The function of these two flavonoids in plants are____

a) protect plants against being eaten by herbivores and against being infected by microbial pathogens

b) Protect cells from excessive UV-B radiation (280–320 nm) because they accumulate in the epidermal layers of leaves and stems and absorb light strongly in the UV-B region       

c) flavones and flavonols secreted into the soil by legume roots mediate the interaction of legumes and nitrogen-fixing symbionts

d) They are are coloured terpenoid compounds that also serve as accessory pigments in photosynthesis    

Which of the following combination from the above statements is correct?

#Question id: 10178

#Unit 6. System Physiology – Plant

Heliotropism is another term used to describe leaf orientation by solar tracking. Some plant species, such as soybean, have leaves that can display different movement such as

a. When the well watered condition plant shows diaheliotropic movements

b. When the well watered condition plant shows Para heliotropic movements

c.  When the water stress condition plant shows paraheliotropic movements

d. When the water stress condition plant shows diaheliotropic movements

Select Correct combination about soyabean plant;

#Question id: 10179

#Unit 6. System Physiology – Plant

A a plant to invest energy in developing multiple cell layers, they are shaped like pillars that stand in parallel columns one to three layers deep. Below the epidermis, the top layers of photosynthetic cells are called

#Question id: 10180

#Unit 6. System Physiology – Plant

The non uniformly distribution of chloroplast, light is only  absorbed by the chlorophyll molecules in the cholorplast rest of the light penetrates to the cell known as

#Question id: 10192

#Unit 6. System Physiology – Plant

Solar-tracking leaves present a nearly vertical position at sunrise, and during the night the leaves take a horizontal position, the sensing of light in solar-tracking leaves occurs in specialized regions of the leaf or stem, it can response for,

#Question id: 10193

#Unit 6. System Physiology – Plant

Leaf orientation is controlled by a specialized organ that contains motor cells that change their osmotic potential and generate mechanical forces that determine laminar orientation, that specialized organ is known as

#Question id: 10194

#Unit 6. System Physiology – Plant

Some plant species are not able to acclimate when transferred from a sunny to a shady environment, or vice versa, lack of acclimation indicates that these plants are specialized for either a sunny or a shady environment. When plants adapted to deep-shade conditions are transferred into full sunlight may leaves experiences;