TESTS 97 



Self-Testing Exercise 



Certain flowers, as butter-and-eggs, are especially fitted to receive 

 (1), which cause both (2) and (3) pollina- 

 tion. A composite head is composed of (4) and (5) 



flowers. Some flowers, as the yucca, are only pollinated when certain 



insects (6) their (7) in them and the seeds are 



(8) by the young parasites which hatch out. Self-pollination 



is usually impossible in flowers which have the (9) and 



(10) maturingat (11) times or placed on (12) 



flowers. Some plants have only (13) or (14) flowers 



and are pollinated by the (15). 



Review Summary 



Check your knowledge of the unit by (1) answering all survey questions; 

 (2) performing all assigned exercises ; (3) checking with your teacher on all the 

 tests and making up all incorrect work ; and finally (4) making an outline of 

 the unit for your notebook. 



Test on Fundamental Concepts 



Make two vertical columns in your notebook, one headed CORRECT and the other IN- 

 CORRECT. In one column write the numbers of the statements you believe to be true. In 

 the other the statements you think are false. Your grade = correct answers times 2. 



I. All insects (1) have two pairs of wings; (2) have three body 

 parts ; (3) have mouth parts adapted to chewing ; (4) have three pairs 

 of legs ; (5) have an external skeleton of chitin. 



II. All insects breathe (6) through their wings ; (7) by taking air 

 out of the water they drink; (8) through holes in the head; (9) by 

 pumping air into their trachea; (10) by swallowing air. 



III. Insects may feed by (11) sucking through a proboscis, as the 

 butterfly; (12) chewing by means of the mandibles, as the grass- 

 hopper; (13) sucking through a beak, as the cicada; (14) lapping 

 liquid food, as the beetle ; (15) piercing and sucking, as the bugs. 



IV. The life history of an insect may (16) have four different 

 stages ; (17) be passed entirely underground as in the beetle ; (18) show 

 an incomplete metamorphosis as in the grasshopper; (19) show a 

 complete metamorphosis as in the house fly; (20) last for thirty or 

 more years. 



V. Insects are very numerous because (21) they produce many 

 young in a season ; (22) they may be colored like their surroundings 



