Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?
A. White
B. Red
C. Blue
D. Green
Biology Mcqs
Chemically auxins are____________?
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_____________?
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
Which of the following tracheophytes are leafless?
Which of the following tracheophytes are leafless?
A. Psilopsida
B. Lycopsida
C. Sphenopsida
D. Prteropsida
Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili_____________?
Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili_____________?
A. Psilopsida
B. Lycopsida
C. Sphenopsida
D. Prteropsida
Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls?
Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls?
A. Psilopsida
B. Lycopsida
C. Sphenopsida
D. Prteropsida
Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _________ branched
Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _________ branched
A. Isotomous
B. Dichotomously
C. Trichotomously
D. Multichotomously
Maize is an example of_________________?
Maize is an example of_________________?
A. Monocot
B. Dicot
C. Gymnosperms
D. none of these
Which of the following statement about dicots is incorrect _________________?
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.
The first cell of the sporophyte generation is______________?
The first cell of the sporophyte generation is______________?
A. Oospore
B. Spore mother cell
C. Spore
D. Gamete