Biology Mcqs

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

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_____________?

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?

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

A. Isotomous
B. Dichotomously
C. Trichotomously
D. Multichotomously

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.

The first cell of the sporophyte generation is______________?

A. Oospore
B. Spore mother cell
C. Spore
D. Gamete

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