Question

Ray florets of sunflower (composite) are
(a) Bisexual
(b) Unisexual
(c) Asexual
(d) None of the above

Answer 1

Hint: Ray florets the outer ring which is characterized by its brightly colored petals and is long, strap-like which is present outside of a sunflower. They do not contain any sex organs so they are unable to reproduce.

Complete answer:
The ray florets of sunflower are asexual which are peripheral and are zygomorphic flowers that are sterile or asexual because they do not possess any reproductive part that is the stamen or pistil. A sunflower is usually a tall plant that can grow up to 300 centimeters and constitutes disc and Ray florets inside it with several ornamental cultivars that have red-colored Ray florets and are single original mutants. Sunflowers show heliotropism during which the sunflower tilt during the day and face towards the sun and stop once it begins to bloom which happens in the young sunflower heads. Sunflowers face towards the east when they mature and follow the sun during heliotropism with the opposite side of the sunflower stem that begins to accumulate the growth hormones which causes the growth that redirects the sunflower.

Additional information:
The leaves of a sunflower are petiolate and dentate which are often sticky and the lower leaves are heart-shaped which are distinguished by the sterile ray florets and the presence of disc flowers which are caducous and get easily detached and fall at maturity. Some perennial species of sunflower show variability among the bulk in which most of them have large leaves in a rosette at the base of the plant and production of the flowering stem which is reduced in size which is entirely yellow with reddish lobes.

So, the correct answer is 'asexual'.

Note:
Sunflower constitutes 1000-2000 seeds and has 70 species with the tallest sunflower of about 30 feet tall. It helps to provide energy in the form of nourishment and known for being a happy flower by making them the perfect gift for bringing joy into someone's day.