A nematode is a roundworm; a planarian's shape gives it this name
Flatworm
Black, especially a pure or jet black, like the stone
Onyx
The root of a plant of the mustard family, this veggie resembles a small beet
Radish
The main historical figure connected with the St. Valentine legend was martyred in this imperial capital
Rome
1981:
This company introduces its "Personal Computer" using the MS-DOS operating system
IBM
In colenterates like jellyfish, the cavity called the coelenteron has an opening called this--don't get too complex
A mouth
Come sail away with Charon on this river, a Greek word meaning "hateful"
Styx
The Eureka is a type of this citrus fruit
A lemon
Valentine is the patron saint not only of lovers but also of sufferers of this deadly medieval disease
The plague
DAILY DOUBLE!
1988:
Crafted by Robert Morris, the first known one of these viruses wriggles into computers
In nat. selection, a red froggus maxtronautus has .5 relative fitness if it produces 1/2 as many of these as a pink one
Patrick Ewing should know this Greek goddess personifying night
Nyx
The white type of this stalked veggie is grown underground; it can't produce chlorophyll & turn green
Asparagus
In some accounts, St. Valentine was not a European but actually one of these that today we would call an Iranian
Persian
1975:
Microsoft is founded by these 2 college dropouts
Paul Allen & Bill Gates
In a fish's 2-chambered heart, it's the chamber that receives blood from the veins
Atrium
This small triangular bone consists of 4 rudimentary vertebrae
Coccyx
The name of this tropical fruit comes from the resemblance of its flowers to symbols of the crucifixion
A passionfruit
As a prisoner of Emperor Claudius, Valentine's fateful mistake leading to his martyrdom was trying to do this to Claudius
Convert him
1997:
A computer with this colorful name defeats a world chess champion
Deep Blue
The 2 main types of vascular seed plants are gymnosperms & these, 80% of known green plants
Angiosperms
It's not a Seussian animal, it's this large African antelope, an endangered species
An oryx
In French, a banana is banane; this tropical fruit is ananas
A pineapple
A St. Valentine's church in Italy was built over one of these subterranean tombs where his remains were found
A catacomb
1994:
Netscape releases this efficient Internet browser
Navigator