Which of the following statements about gram-negative cell walls is false?
a) they are sensitive to penicillin.
b) they protect the cell in a hypotonic environment.
c) their gram reaction is due to the outer membrane.
d) they have an extra outer layer composed of lipoproteins, lipopolysaccharides, and phospholipids.
e) they are toxic to humans.

What did the first language sound like

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables