Yes they are
The little balls on the bottom of live oak leaves that resemble burrs are most likely galls, which are abnormal growths caused by various insects or mites. Galls can vary in appearance and are triggered by the plant's response to the insect's saliva or larvae. While galls are generally harmless to the tree, they can be unsightly.
Galls
galls me
Edward T. Connold has written: 'British oak galls' -- subject(s): Galls (Botany), Oak, Diseases and pests 'Plant galls of Great Britain'
To eat or lay eggs to develop into larvae. galls in saplings are caused by insects
22 galls. 2 quarts or 22.5 galls. Remember there are 4 quarts in one gallon.
Leaves are under continuous attack by insects, viruses, mold, and fungus. Many of these can cause growths. Many things that look like growths may be cleverly disguised insect eggs, or shape-changing insects in camouflaged cocoons. Some growths on leaves are caused by chemicals emitted by an insect. This causes the leaf to grow a little lump of leaf cells, making a safe spot to protect the insect's eggs.
None ,any fish really should kept in 10 galls or more despite what common population culture depicts.
the glitzy galls
9
there are these things that grow on oak trees , call "wolly galls" how bad are they , and will it shorten the life of the tree?Type your answer here...
Fasciation: abnormal flattening or elongation of plant stems. Witch's broom: dense clusters of branches growing from a single point. Albinism: absence of chlorophyll resulting in white or pale-colored leaves. Galls: abnormal growths caused by insect or microbial infection.