Which characteristic of living cells do viruses lack?

a. They lack structural proteins.
b. They lack nucleic acids to transmit viral characteristics.
c. They lack a complete replication apparatus.
d. They lack nucleic acid transcription.

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

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?

When ash and dust begin to settle on the ground, they eventually become compacted by