Zig-zag.  

Fruit; Fruiting.  

Minutely pitted, with small depressions.  

Pitted.  

Small pit. The region in the retina that is closely packed with cones. A depression in the retina which is...

The fact that small isolated groups of immigrants do not represent the complete gene pool for their species and hence...

With small grooves.  

Arched or vaultlike; shaped like a fornix. With scale-like appendages. Arching over.  

Form, a group of plants within a species differing slightly (usually by a single character) from the main population but...

Slight variant; usually with a minor genetic basis. The distinctive size, shape, and external appearance of an object. A piece...