Question

Read the following statements and find out the incorrect statement.

a. The number and length of stamens is variable in flowers of the same species.

b. A typical angiosperm anther is bilobed, with each lobe having two theca.

c. Often a longitudinal groove runs lengthwise separating the theca.

d. The anther consists of four microsporangia located at the corners one in each lobe.

e. The microsporangia develop further and become pollen sacs. They extend longitudinally all through the length of an anther and are packed with pollen grains.

• A. a and b only
• B. a and d only
• C. b, c and e
• D. a, c and d

Answer 1

The correct option is B a and d only

$\text{Stamen}$

Stamen is the male reproductive organ which possesses a slender stalk called filament and a terminal structure called anther. The number and length of stamens is the same in flowers of the same species.

$\text{Anther}$
Anther is a bilobed and each lobe has two theca (dithecous) and two pollen sacs (microsporangia). It is tetrasporangiate as it possesses four microsporangia which are located at the corners, two in each lobe. A longitudinal groove runs lengthwise and separates the theca of each lobe.

$\text{Pollen grains}$

In microsporangium, the microspore mother cell divides by meiosis to produce haploid tetrads called microspore tetrads. Tetrads develop into pollen grains.

$\text{Final answer}$

(c) a and d only