Chemically auxins are____________?
A. Indole propionic acid.
B. Indole carboxylic acid.
C. Indole acetaldehyde
D. Indole acetic acid.
Chlorosis, i.e., yellowish hue on the leaves results from_____________?
A. Accumulation of toxic waste products in leaves.
B. Deficiency of chlorophyll.
C. Short supplies of mineral nutrients in the soil.
D. All of these
Maize is an example of_________________?
A. Monocot
B. Dicot
C. Gymnosperms
D. None of these
Which of the following statement about dicots is incorrect _________________?
A. They have 4 or 5 sepals and petals or their multiple.
B. They have parallel vein pattern on their leaves
C. They are both herbaceous and woody
D. Vascular bundles are ring shaped in their stems.
Monocots are characterized by___________?
A. Number of sepals and petals are 2 or multiple of 2
B. Number of sepals and petals are 3 or multiple of 3
C. Number of sepals and petals are 4 or multiple of 4
D. Number of sepals and petals are 5 or multiple of 5
Pinus Taxus and Picea belong to_________________?
A. Spheospsida
B. Filicineae
C. Gymnosperms
D. Angiosperms