Abalone, she says, make their shells by creating a fine brick-like wall of nanosize tiles of two types of chalk, something that makes them 3,000 times tougher than the chalk found in rock.
Despite working at cross-purposes, the two types of cells apparently have something in common: a newfound gene involved in regulating their proliferation.
And its distinctive design, inside and out, may attract two types of customers: bored Prius owners who want something new, and people who crave high mileage but wouldn't be caught dead in a Prius, for either its econobox vibe or its granola image.
We designed an experimental paradigm allowing us to assess time-based (remembering to do something at a particular time) and event-based (remembering to do something in a particular situation) prospective memory, using two types of material, words and pictures.
There are two types of beauty spot.
It offers two types of credit.
There are two types of vision here.
Many species have two types of flowers.
There are two types of growth assay.
There are two types of Indo-Dutch furniture.
Comment about two types of consumers.
