Howard is making a class presentation about the process of abrasion and he wants to model the process. Which of these can Howard do to model the
process of abrasion?

A. Pour water over a pile of sand

B. Rub a soft rock on a rough surface

C. Put flat iron fillings in a beaker of water

D. Place a Few small drops of acid on a rock.

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

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?

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.