Global warming causes changes in long-term weather patterns like and that makes farming more challenging. A . clouds, sunshine
B . hurricanes, blizzards
C . wildfires, high winds
D . rainfall, drought

The chart below matches messenger rna codons with amino acids. a dna strand has the sequence of bases, aat. according to the chart, the corresponding messenger rna codes for which amino acid?

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.

What did pavlov initially notice about the animals in his original research after conditioning took place?