Blackbird eating a ripe fig. 1  As well as scratching up your vegetable beds in search of worms blackbirds will readily eat a variety of ripe fruits including tomatoes. They are by far the biggest threat to my tomato crop and if not checked can cause a lot of damage.
Dwarfism can be caused by more than 200 different conditions, but there are two causes that are most commonly seen in humans. The first main cause is achondroplasia, which accounts for about 70% of drawfism cases.
Natural selection causes a gradual change in the characteristics of the species Any mutation that affects or ocurs in the germ line cells that makes the sperns and the eggs will be passed on. Thus parents with dwarfism will definitely pass it to their offspring.