Starting apple seeds CAN lead to a viable apple tree, but you generally have to find an apple tree that is growing in your area, which hasn't been grafted, and take seed from it. Every time a plant is pollinated it may or may not produce viable seeds, whether you "hybridize" it or not. Sometimes hybridization causes a better rate of germination or viability. Hybridization in itself is not a bad thing at all as nature has been doing it for ever. It is true that most grocery store varieties of apples will not produce viable seeds, and if they do it's even more likely that they will not grow well if at all in your area. Apple seedlings require about 6 years to begin producing any apples.
I currently have 10 nice habanero/scotch bonnet seedlings. They are more meticulous to start than other peppers. They love heat, especially for germination, if you can germinate them at 23-27 celcius. As soon as they have two leaves and are about 2 inches tall remove the clear plastic cover, they are very susceptible to damping off, which means they come up look good for a few days and then wilt and die, that is because of too much moisture so they have to be out in open air right away. They can take up to 6 weeks for germination although all 10 of mine came up within 6 days.
One HUGE tip for seedlings that are planning to go outside. Get yourself an oscillating fan to simulate wind. Wind is the main issue for weak seedlings going outdoors. If they have never had any wind to fight against, the stalks and stems are too weak. If you don't have a fan and can't get one easily for some reason(you can find them for a couple bucks at a thrift store) you can also lightly brush your hands back and forth over them as often as you can remember. Another thing about hardening plants is if you have grown them indoor using florescent bulbs they need to adjust to the intensity of the sun. You'll have to put them outside or in a window sill for a short time every day and gradually increase the amount of sunshine. If bringing your plants in and out every day doesn't fit into your schedule you can put your plants out and use things like pantyhose or window screens to decrease the intensity of the sunlight for the first little while and it's also a good idea to try and put your plants out on a clouded over day with little wind. These tips will help you from losing your seedlings after spending the time to care for them.
My instructions said that the seedlings need to be removed from the device and 'hardened off' before planting. For me this amounts to taking the lid off and placing it outside or in a window for min 3 days without tons of water. Might help with your survival quotient!!
I have a comment to this. Your plants, once they are seedlings, should not need tonnes of water unless it's celery or lettuce you're growing inside. Thing like peppers can be almost completely dry before getting a decent soaking. This actually produces strong plants with better root structures because the roots have to work harder to get water and nutrients. Good roots make good plants
Also make sure you dont put those habaneros out until the soil is well warmed and there is absolutely no chances of even a cold night.
Hope this can help someone.