Apple and Strawberry are examples of "false fruits" because:
In a few species such as apple, strawberry, cashew, etc., the thalamus also contributes to fruit formation. Such fruits are called false fruits.
Question 252 of 501
📘 CLASS XII
Parthenocarpic fruits, such as banana, develop:
Fruits develop without fertilization. Such fruits are called parthenocarpic fruits.
Question 253 of 501
📘 CLASS XII
The oldest viable seed discovered, Lupinus arcticus, germinated after an estimated dormancy of:
The seed germinated and flowered after an estimated record of 10,000 years of dormancy.
Question 254 of 501
📘 CLASS XII
Apomixis is a phenomenon where:
Apomixis is a special mechanism to produce seeds without fertilization.
Question 255 of 501
📘 CLASS XII
Polyembryony, as seen in Citrus and Mango, involves embryos developing from:
In many Citrus and Mango varieties some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and develop into the embryos.
Question 256 of 501
📘 CLASS XII
What is the primary advantage of using apomictic seeds in the hybrid seed industry?
If hybrids are made into apomicts, there is no segregation of characters in the hybrid progeny. Farmers can keep on using the hybrid seeds year after year.
Question 257 of 501
📘 CLASS XII
The proximal end of the filament of a stamen is attached to the:
The proximal end of the filament is attached to the thalamus or the petal of the flower.
Question 258 of 501
📘 CLASS XII
Which of the following describes the structure of a typical angiosperm anther?
A typical angiosperm anther is bilobed with each lobe having two theca, i.e., they are dithecous.
Question 259 of 501
📘 CLASS XII
In the transverse section of an anther, the microsporangia develop further to become:
The microsporangia develop further and become pollen sacs.
Question 260 of 501
📘 CLASS XII
The process of formation of microspores from a Pollen Mother Cell (PMC) is termed:
The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis.
