Panicle Inflorescence: (oats, some grasses) branched structure at tip of stem
Spike Inflorescence: (wheat, barley) spikelets attached directly to stem.
Raceme Inflorescence: (mustard, rapeseed) single flowers attached to stalk or stem.
Head Inflorescence: (sunflower) enlarged stem = receptacle
An Apple or Tomato is considered a fruit. A Fruit is a mature ovary. Fruits can be fleshy (tomato) or dry (wheat)
process of transferring pollen grains from the anther to the stigma plants can be self-pollinated (male & female flowers on same plant) or cross-pollinated (different plants)
when sperm is united with an egg pollen lands on stigma, germinates, and grows down style to the ovary where sperm fertilizes the egg (pollen tube) there are actually two fertilizations. Second sperm fertilizes second egg to form the endosperm (food for the seed)