You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structure will you use to distinguish between the two?
Secondary xylem
Secondary phloem
Protoxylem
Protoxylem
C.
Protoxylem
In dicot stem, the protoxylem is present towards the center (pith) and metaxylem is present towards the periphery of the organ. This type of xylem is known as endarch. In root, the protoxylem is present towards periphery and metaxylem present towards the centre that is called exarch.
The osmotic expansion of a cell kept in water is chiefly regulated by
mitochondria
vacuoles
plastids
plastids
Which of the following statements is correct?
The seed in grasses is not endospermic
Mango is a parthenocarpic fruit
A proteinaceous aleurone layer is present in maize grain
A proteinaceous aleurone layer is present in maize grain
In which one of the following processes CO2 is not released?
Aerobic respiration in plants
Aerobic respiration in animals
Alcoholic fermentation
Alcoholic fermentation
Which one of the following shows isogamy with non-flagellated gametes?
Sargassum
Ectocarpus
Ulothrix
Ulothrix
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as
vexillary
imbricate
twisted
twisted
Deficiency symptoms of nitrogen and potassium are visible first in
senescent leaves
young leaves
roots
roots
Which one of the following is wrong about Chara?
upper oogonium and lower round antheridium
Globule and nucule present on the same plant
Upper antheridium and lower oogonium
Upper antheridium and lower oogonium
Which one of the following fungi contains hallucinogens?
Morchella esculenta
Amanita muscaria
Neurospora sp.
Neurospora sp.
