Question

To which of the following do tulip and crocus show response?
(a) Water
(b) Light
(c) Temperature
(d) Touch

Answer 1

In the iris family, Crocus is a genus of flowering plants comprising 90 species of corm-based perennials. Many are cultivated in fall, winter, or spring for their flowers. Tulips form a genus of annual herbaceous bulbiferous geophytes that are spring-blooming. The flowers are typically large, brightly colored, and showy, usually red, pink, yellow, or white.

Complete step by step answer:
The opening of many spring blooming flowers depends primarily on temperature. For the complete opening of Ficaria, Galanthus, Tulip, and Crocus, a small temperature rise in the morning is appropriate.
In most species, in a way similar to the opening, flower closure responds to external factors. However, closing is apparently due to an endogenous rhythm in some animals, even though the opening is not. In other species, closure is related to senescence.
Examples of flowers that close due to a drop in temperature are tulips and crocus. The minimum temperature decrease was roughly equal to the rise in temperature required for the opening.
Tulips are mainly distributed along a latitude $40^\circ$ north band, from southeast Europe (Greece, Albania, Macedonia, Kosovo, Southern Serbia, most of Romania, Ukraine, Russia) and from western Turkey, from the Levant (Syria, Israel, Lebanon, Jordan, the Palestinian Territories) and the Sinai Peninsula.
So, the correct answer is ‘ (c) Temperature’.

Note:
- Tulips and crocus are ornamental flowers used in decorations and on special occasions.
- They have a beautiful appearance and produce a soothing and pleasant odor. Flowers appear after planting for the first time (usually in September or October) and last for around 3 weeks. Soon after the flowers, the grass-like leaves may emerge or wait until the following spring.