Crossword No21
ACROSS
1 Part of the female reproductive mechanism of a flower (6)
4 Rumen, reticulum, omasum and abomasum, for instance (8)
10 Grass fibre from the Mediterranean region (7)
11 1985 sci-fi novel by Carl Sagan (7)
12 The only even prime number (3)
13 Irene ___ (1897–1956), joint winner of the 1935 Nobel Prize for Chemistry (6-5)
14 Three-part brain structure first proposed by Paul D. Maclean (6)
15 Condition that may be congenital, chronic or idiopathic (7)
19 Human-like automaton (7)
20 In electronics, a valve composed of three electrodes (6)
23 Traits developed by evolution…
