Sporophyte generation - It is found in both seed and seedless plant. Dominant phase of the life cycle of the seedless plants is diploid sporophyte while in seed plant male and female gametes fuses to produces a diploid zygote which develops into a sporophyte.
Pollination - It occurs in seed plants only
Sporophyte contains male and female reproductive structures - It is found in both seed and seedless plant.
Single fertilization - It occurs in both seed and seedless plant
Sperm cells transported by water to egg cells - seedless plant only
The Kingdom Protista has a bunch of organisms thrown into the category because scientists have yet to sort them out properly. In the future these classifications might become more specific.
Forest: A large area covered in trees.
Taiga: A snow forest.
Tundra: A flat area with no trees.
Desert: A large, dry area covered in sand
Savanna: A grassy plain in tropical and subtropical regions with very few trees.
Grassland: A large open area covered in grass.
Chaparral: A land with vegetation that consists of shrubs and bushes with thorns.
Mixed Forest: A forest with two or more kinds of different trees.
Hope this helps!
The only way for gases to diffuse in and out of the leaf is though small openings on the underside of the leaf, the stomata
That depends on what you mean by ripples at the beginning of time. If you are referring to inflation of the universe caused by the Big Bang, and the subsequent "ripples", then those ripples are the leftover, background radiation from the event. If you are referring to ripples in space-time, then it still could have multiple meanings.