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.

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?

Describe the trends in electron configuration in the periodic table by selecting the terms from the drop down menus

Thyroid-stimulating hormone stimulates the thyroid gland to secrete sex hormones. true or false