Which of the following best describes bases? A They feel slippery and taste sour.

B They turn red litmus paper blue and react with metals.

C They taste bitter and react with carbonates.

D They turn red litmus paper blue and taste bitter

They turn moist red litmus paper blue and they react with metals.

They turn moist red litmus paper blue because they have a pH range of 8-14, hence they are indicated by a blue colour of the litmus.

They react with metals because they are reactive, the reaction forms a metal salt and water.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.