Star x has a magnitude of -30 star y has a magnitude of -25. which of the following statements is true?
star y is brighter than star x
star x is older than star y.
the brightness ratio is 99.8 :
the absolute magnitude of star x is 30.

The ocean layer of a rapid temperature change with deph is known as the

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

What is the most appropriate method of gaining weight (muscle mass)