You are given a prepared slide and are told that it is a streptobacillus. without even looking at the slide under the microscope, you know which of the following? 1. the bacteria are linked together in chains. 2. the bacteria are spherical in shape. 3. the bacteria are in grape-like clusters. 4. the bacteria are rod-shaped. 5. the bacteria are gram-negative.
a) 1,2.
b) 1,4.
c) 2,3.
d) 2,4.
e) 1,4,5.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.