Most of the plants produce single type of flowers but Viola, Commelina and Oxalis produce two types of flowers. Explain.

Number of gametes produced by a male gametophyte of flowering plant is

Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. The reason for failure of fruit formation in rose may be

A factory produces three items P,Q and R at two plants A and B . The number of items produced and operating costs per hour is as follows: It is desired to produce at least 500 items of type P , at least 400 items of type Q and 300 items of type R per day. Write the objective function and constraints.

+2 Students of a school at Kasaragod distric on their study tour collected flowers showing the following character: Flowers are with light pollen grains. Colourful flowers. Nector producing flowers. Flowers with feathery stigma. Write the name of 2 flowers pollinating through water.

Certain samples of water do no produce easy lather with soap. Which are two types of of this condition?

A factory produces three items P,Q and R at two plants A and B . The number of items produced and operating costs per hour is as follows: It is desired to produce at least 500 items of type P , at least 400 items of type Q and 300 items of type R per day. Is it a maximisation case or a minimisation case? Why?

Nicotiana sylvestris flowers only during long days and N.tobacum flowers only during short days. If raised in the laboratory under different photoperiods. they can be induced to flower at the same time and can be cross fenjlized to produce self-fertile offspring. What is the best reason for considering N. sylvestfis and N. tobocum to be separate species?