HORTICULTURE

Detailed explanation-1: -The haploid plant body produces gametes by mitosis represented by a gametophyte. After fertilization, the zygote also divides by mitosis resulting in a diploid sporophytic plant body that produces haploid spores by meiosis.

Detailed explanation-2: -The plants that are recognized as pines are diploid, sporophyte plants. All conifers, including pines, are heterosporous and produce two kinds of spores, both on the same tree.

Detailed explanation-3: -Consider a mature pine tree-it is the diploid sporophyte generation. It produces two types of cones, male and female. In the male cones, in compartments on each “scale", 2n microsporocyte cells go through meiosis and produce 4 equally sized haploid microspores.

Detailed explanation-4: -Starting at the bottom of the image, there is a pine tree. This is the mature sporophyte (2n). It will produce both seed cones and pollen cones because it is monoecious.

Detailed explanation-5: -The sexual phase, called the gametophyte generation, produces gametes, or sex cells, and the asexual phase, or sporophyte generation, produces spores asexually. In terms of chromosomes, the gametophyte is haploid (has a single set of chromosomes), and the sporophyte is diploid (has a double set).