1.   For example, the bacterium Bacillus thuringiensis has the ability to produce crystalline spores which act as natural insecticides.

2.   These plants rarely produce spores but propagate vegetatively.

3.   It produced spores.

4.   Karnal bunt attacks mature wheat kernels and produces spores that can spread quickly through the wind or on the fur of animals.

5.   Most of these canker-causing fungi produce their spores in late summer or fall, so they are out and about looking for a home.

6.   To produce a spore small enough to infect the lungs took great skill.

7.   When the bacterium is exposed to air, it produces spores that can last for centuries.

8.   More spores are produced and are carried by wind or rain to neighbor plants to start new infections.