The scientist wants to investigate the mechanism that causes heart rate and and respiratory rate to increase. Which of these variables could be decreased to observe an increase in both heart rate and respiratory rate?
O amount of oxygen in the air
amount of time on the treadmill
O number of subjects in the study
O size of the room

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?

What element is able to combine with itself and hydrogen to form large molecules ?

Dna and rna share a number of similarities,but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna