Tag: growth and development in plants

1. Maize has an inflorescence of spikelets as flowers are born on an axis called rachilla surrounded by bracts.
2. Datura flower is bell-shaped and a solitary flower.
3. Chrysanthemum often shows solitary head inflorescence.
4. Marigold has spike inflorescence means with short or no pedicel are elongated and unbranched peduncle.

The flower is considered as the modified shoot that is meant for reproduction and contains the reproductive organs stamen (male reproductive part) and pistil (female reproductive part) and after fertilization, its parts convert into fruits and vegetables as a result of reproduction.

Carpels, pistil or gynoecium are the female reproductive part of the flower that consists of a stigma that holds the pollen grains, the style that leads the path of pollen tube and ovary produce small structures called ovules or ovum (female gamete).

Cloves represent the flower bud. They are aromatic.  They are flower buds of a tree Syzygium aromaticum belonging to the family Myrtaceae.

A.Camerarius – He first discovered sexual reproduction in plants.

B.Nawaschin – He first discovered triple fusion and double fertilization in angiosperms.

C.Strasburger – He first discovered syngamy and monosporic embryo sac in angiosperms.

D.Maheswari – He first discovered the lab to land habit in plants.

So, the correct option is ‘Camerarius’.

Free petals - Polypetalous 

Petaloid bracts are present in Bougainvillea. Petaloids are structures resembling petals but actually they are not. The actual flower of the plant is small and generally white, but each cluster of three flowers is surrounded by three or six bracts with the bright colours associated with the plant, including pink, magenta, purple, red, orange, white or yellow.  A bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often (but not always) different from foliage leaves. They may be smaller, larger or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals or sepals.

Plant honey is secreted by nectaries. Nectar is a sugar-rich liquid produced by plants in glands called as nectaries, either within the flowers with which it attracts pollinating animals or by extrafloral nectaries, which provide a nutrient source to animal mutualists, which in turn provide antiherbivore protection. Common nectar-consuming pollinators include bees, butterflies and moths, hummingbirds, and bats.
Therefore, the correct answer is option B.