176 



FIRST TEAR SCIENCE 



northern part of the United States, while cotton, rice and 

 oranges are of the southern part. 



If plants are to flourish, the heat and cold and amount of 

 moisture must be such that the seeds can ripen and find suit- 

 able conditions for preservation and growth in succeeding 

 years. Plants like the cactus and the Yucca Palm which 



YUCCA PALM. 



thrive in the dry and desert regions of New Mexico and 

 Arizona would soon die in the moist climate of Louisiana. 

 As animals live upon plants or upon other animals, the 

 plants must supply the food of the plant-eating animals 

 and through these of the animal eaters. Thus, the dis- 

 tribution of plants has a great effect upon the animal life. 

 Animals that eat grass will not live in a desert, jieither 

 will animals that eat nuts live in a prairie, where there 

 are no nut-bearing plants. 



